<PAGE>   1

    As filed with the Securities and Exchange Commission on November 23, 1999

                                                Registration No. 333-___________

===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

                              --------------------

                          JUPITER COMMUNICATIONS, INC.
             (Exact name of registrant as specified in its charter)

            DELAWARE                                   13-4069996
  (State or other jurisdiction             (I.R.S. Employer Identification No.)
of incorporation or organization)

                                  627 BROADWAY
                               NEW YORK, NY 10012
               (Address of principal executive offices) (Zip Code)

                              --------------------

                          JUPITER COMMUNICATIONS, INC.
                            1999 STOCK INCENTIVE PLAN
                        1999 EMPLOYEE STOCK PURCHASE PLAN
                                1997 OPTION PLAN
                            (Full title of the Plans)

                              --------------------

                                   GENE DEROSE
                             CHIEF EXECUTIVE OFFICER
                          JUPITER COMMUNICATIONS, INC.
                        627 BROADWAY, NEW YORK, NY 10012
                     (Name and address of agent for service)
                            TELEPHONE (212) 780-6060
                            FACSIMILE (212) 780-6075
          (Telephone number, including area code, of agent for service)

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
=================================================================================================================================
                                                                                          PROPOSED MAXIMUM
                                          AMOUNT TO BE     PROPOSED MAXIMUM OFFERING      AGGREGATE OFFERING         AMOUNT OF
 TITLE OF SECURITIES TO BE REGISTERED    REGISTERED (1)        PRICE PER SHARE                 PRICE            REGISTRATION FEE
----------------------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                     <C>                     <C>                     <C>
1999 Stock Incentive Plan
Common Stock, $0.01 par value           5,000,000 shares         $34.625(2)             $173,125,000.00(2)       $48,128.75

----------------------------------------------------------------------------------------------------------------------------------

1999 Employee Stock Purchase Plan
Common Stock $0.01 par value              500,000 shares         $34.625(2)             $ 17,312,500.00(2)       $ 4,812.88

----------------------------------------------------------------------------------------------------------------------------------

1997 Option Plan
Common Stock $0.01 par value            2,658,869 shares         $   3.65(3)            $  9,704,871.85(3)       $ 2,697.95

----------------------------------------------------------------------------------------------------------------------------------

                                        8,158,869 shares                             Aggregate Registration Fee: $55,639.58

=================================================================================================================================
</TABLE>


(1)  This Registration Statement shall also cover any additional shares of
     Common Stock which become issuable under the Jupiter Communications, Inc.
     1999 Stock Incentive Plan, 1999 Employee Stock Purchase Plan and 1997
     Option Plan by reason of any stock dividend, stock split, recapitalization
     or other similar transaction effected without the Registrant's receipt of
     consideration which results in an increase in the number of the outstanding
     shares of Registrant's Common Stock.


<PAGE>   2

(2)  Calculated solely for purposes of this offering under Rule 457(h) of the
     Securities Act of 1933, as amended, on the basis of the average of the high
     and low selling prices per share of Registrant's Common Stock on
     November 16, 1999, as reported by the Nasdaq National Market.

(3)  Calculated solely for purposes of this offering under Rule 457(h) of the
     Securities Act of 1933, as amended, on the basis of the weighted average
     exercise price of the outstanding options.



                                      II-2
<PAGE>   3

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference

         Jupiter Communications, Inc. (the "Registrant") hereby incorporates by
reference into this Registration Statement the following documents previously
filed with the Securities and Exchange Commission (the "SEC"):

         (a)      The Registrant's Prospectus filed with the SEC pursuant to
                  Rule 424(b) promulgated under the Securities Act of 1933, as
                  amended, filed with the SEC on October 8, 1999, in connection
                  with the Registrant's Registration Statement No. 333-84175, in
                  which there is set forth the audited financial statements for
                  the Registrant's fiscal year ended December 31, 1998;

         (b)      The Registrant's Registration Statement No. 000-27537 on Form
                  8-A12G filed with the SEC on October 4, 1999 in which there is
                  described the terms, rights and provisions applicable to the
                  Registrant's outstanding Common Stock.

         All reports and definitive proxy or information statements filed
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of
1934, as amended, (the "1934 Act") after the date of this Registration Statement
and prior to the filing of a post-effective amendment which indicates that all
securities offered hereby have been sold or which deregisters all securities
then remaining unsold shall be deemed to be incorporated by reference into this
Registration Statement and to be a part hereof from the date of filing of such
documents. Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Registration Statement to the extent that a statement
contained herein or in any subsequently filed document which also is deemed to
be incorporated by reference herein modifies or supersedes such statement. Any
such statement so modified or superseded shall not be deemed, except as so
modified or superseded, to constitute a part of this Registration Statement.

Item 4.  Description of Securities

         Not Applicable.

Item 5.  Interests of Named Experts and Counsel

         Not Applicable.

Item 6.  Indemnification of Directors and Officers

         The registrant's certificate of incorporation, as amended and restated,
in effect as of the date hereof, provides that, except to the extent prohibited
by the Delaware General Corporation Law, as amended (the "DGCL"), the
registrant's directors shall not be personally liable to the registrant or its
stockholders for monetary damages for any breach of fiduciary duty as directors
of the registrant. Under the DGCL, the directors have a fiduciary duty to the
registrant which is not eliminated by this provision of the Certificate and, in
appropriate circumstances, equitable remedies such as injunctive or other forms
of non-monetary relief will remain available. In addition, each director will
continue to be subject to liability under the DGCL for breach of the director's
duty of loyalty to the registrant, for acts or omissions which are found by a
court of competent jurisdiction to be not in good faith or involving intentional
misconduct, for knowing violations of law, for actions leading to improper
personal benefit to the director, and for payment of dividends or approval of
stock repurchases or redemptions that are prohibited by DGCL. This provision
also does not affect the directors' responsibilities under any other laws, such
as the Federal securities laws or state or Federal environmental laws.

         Section 145 of the DGCL empowers a corporation to indemnify its
directors and officers and to purchase insurance with respect to liability
arising out of their capacity or status as directors and officers, provided that
this provision shall not eliminate or limit the liability of a director: (i) for
any breach of the director's duty of loyalty to the corporation or its
stockholders, (ii) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) arising under
Section 174 of the DGCL, or (iv) for any transaction from which the director
derived an improper personal benefit. The DGCL provides further that the
indemnification




                                      II-1
<PAGE>   4

permitted thereunder shall not be deemed exclusive of any other rights to which
the directors and officers may be entitled under the corporation's bylaws, any
agreement, a vote of stockholders or otherwise. The Certificate eliminates the
personal liability of directors to the fullest extent permitted by Section
102(b)(7) of the DGCL and provides that the registrant shall fully indemnify any
person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding (whether civil,
criminal, administrative or investigative) by reason of the fact that such
person is or was a director or officer of the registrant, or is or was serving
at the request of the registrant as a director or officer of another
corporation, partnership, joint venture, trust, employee benefit plan or other
enterprise, against expenses (including attorney's fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by such person in
connection with such action, suit or proceeding.

         At present, there is no pending litigation or proceeding involving any
director, officer, employee or agent as to which indemnification will be
required or permitted under the Certificate. The registrant is not aware of any
threatened litigation or proceeding that may result in a claim for such
indemnification.

Item 7.  Exemption from Registration Claimed

         Not Applicable.

Item 8.  Exhibits

<TABLE>
<CAPTION>
Number                           Exhibit
------                           -------
<S>       <C>
4         Instruments Defining Rights of Stockholders. Reference is made to
          Registrant's Registration Statements No. 000-27537 on form 8-A12G
          which is incorporated herein by reference pursuant to Item 3(b).

5         Opinion and consent of Brobeck, Phleger & Harrison LLP.

23.1      Consent of KPMG LLP, Independent Accountants.

23.2      Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.

24        Power of Attorney. Reference is made to page II-4 of this Registration
          Statement.

99.1      Jupiter Communications, Inc. 1999 Stock Incentive Plan.

99.2      Jupiter Communications, Inc. 1999 Employee Stock Purchase Plan.

99.3      Jupiter Communications, Inc. 1997 Option Plan.
</TABLE>


Item 9.  Undertakings.

         A. The undersigned Registrant hereby undertakes: (1) to file, during
any period in which offers or sales are being made, a post-effective amendment
to this Registration Statement (i) to include any prospectus required by Section
10(a)(3) of the 1933 Act, (ii) to reflect in the prospectus any facts or events
arising after the effective date of this Registration Statement (or the most
recent post-effective amendment thereof) which, individually or in the
aggregate, represent a fundamental change in the information set forth in this
Registration Statement and (iii) to include any material information with
respect to the plan of distribution not previously disclosed in this
Registration Statement or any material change to such information in this
Registration Statement; provided, however, that clauses (1)(i) and (1)(ii) shall
not apply if the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed by the
Registrant pursuant to Section 13 or Section 15(d) of the 1934 Act that are
incorporated by reference into this Registration Statement; (2) that for the
purpose of determining any liability under the 1933 Act each such post-effective
amendment shall be deemed to be a new registration statement relating to the
securities offered therein and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof; and (3) to remove
from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the Jupiter
Communications, Inc. 1999 Stock Incentive Plan, 1999 Employee Stock Purchase
Plan and 1997 Option Plan.



                                      II-2
<PAGE>   5

         B. The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the 1933 Act, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference into this Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

         C. Insofar as indemnification for liabilities arising under the 1933
Act may be permitted to directors, officers, or controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that, in the opinion of the SEC, such indemnification is
against public policy as expressed in the 1933 Act, and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer, or controlling person of the Registrant in the
successful defense of any action, suit, or proceeding) is asserted by such
director, officer, or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the 1933 Act and will be governed by the final
adjudication of such issue.



                                      II-3
<PAGE>   6

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-8, and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of New York, State of New York on this 23rd day of
November, 1999.

                                     JUPITER COMMUNICATIONS, INC.


                                     By: /s/ Gene DeRose
                                        ---------------------------
                                         Gene DeRose
                                         Chief Executive Officer

                                POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS:

         That the undersigned officers and directors of Jupiter Communications,
Inc., a Delaware corporation, do hereby constitute and appoint Gene DeRose,
Chief Executive Officer, and Jean Robinson, Chief Financial Officer, and each of
them, the lawful attorneys-in-fact and agents with full power and authority to
do any and all acts and things and to execute any and all instruments which said
attorneys and agents, and any one of them, determine may be necessary or
advisable or required to enable said corporation to comply with the Securities
Act of 1933, as amended, and any rules or regulations or requirements of the
Securities and Exchange Commission in connection with this Registration
Statement. Without limiting the generality of the foregoing power and authority,
the powers granted include the power and authority to sign the names of the
undersigned officers and directors in the capacities indicated below to this
Registration Statement, to any and all amendments, both pre-effective and
post-effective, and supplements to this Registration Statement, and to any and
all instruments or documents filed as part of or in conjunction with this
Registration Statement or amendments or supplements thereof, and each of the
undersigned hereby ratifies and confirms that all said attorneys and agents, or
any one of them, shall do or cause to be done by virtue hereof. This Power of
Attorney may be signed in several counterparts.

         IN WITNESS WHEREOF, each of the undersigned has executed this Power of
Attorney as of the date indicated.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities and on the dates indicated.

<TABLE>
<CAPTION>
Signature                Title                                     Date
---------                -----                                     ----
<S>                     <C>                                        <C>
/s/ Gene DeRose
---------------------   Chief Executive Officer and Chairman       November 23, 1999
Gene DeRose             of the Board of Director (Principal
                        Executive Officer)

/s/ Kurt Abrahamson
---------------------   President, Chief Operating Officer and     November 23, 1999
Kurt Abrahamson         Director

/s/ Jean Robinson
---------------------   Chief Financial Officer (Principal         November 23, 1999
Jean Robinson           Financial and Accounting Officer)
</TABLE>




                                      II-4
<PAGE>   7


<TABLE>
<S>                     <C>                                        <C>
/s/ Robert Kavner
---------------------   Director                                   November 23, 1999
Robert Kavner


/s/ Jeff Ballowe
---------------------   Director                                   November 23, 1999
Jeff Ballowe
</TABLE>



                                      II-5
<PAGE>   8

                       SECURITIES AND EXCHANGE COMMISSION

                                WASHINGTON, D.C.

                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933

                          JUPITER COMMUNICATIONS, INC.



<PAGE>   9

                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
Number                           Exhibit
------                           -------
<S>       <C>
4         Instruments Defining Rights of Stockholders. Reference is made to
          Registrant's Registration Statements No. 000-27537 on form 8-A12G
          which is incorporated herein by reference pursuant to Item 3(b).

5         Opinion and consent of Brobeck, Phleger & Harrison LLP.

23.1      Consent of KPMG LLP, Independent Accountants.

23.2      Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.

24        Power of Attorney. Reference is made to page II-4 of this Registration
          Statement.

99.1      Jupiter Communications, Inc. 1999 Stock Incentive Plan.

99.2      Jupiter Communications, Inc. 1999 Employee Stock Purchase Plan.

99.3      Jupiter Communications, Inc. 1997 Option Plan.
</TABLE>
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 20394}]
{"company-data": {"conformed-name": "JUPITER COMMUNICATIONS INC", "cik": "0001091908", "assigned-sic": "7389", "irs-number": "113497726", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-91513", "film-number": "99763117"}, "business-address": {"street1": "627 BROADWAY", "city": "NEW YORK", "state": "NY", "zip": "10012", "phone": "2127806060"}, "mail-address": {"street1": "627 BROADWAY", "city": "NEW YORK", "state": "NY", "zip": "10012"}}
1

    As filed with the Securities and Exchange Commission on November 23, 1999

                                                Registration No. 333-___________

===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

                              --------------------

                          JUPITER COMMUNICATIONS, INC.
             (Exact name of registrant as specified in its charter)

            DELAWARE                                   13-4069996
  (State or other jurisdiction             (I.R.S. Employer Identification No.)
of incorporation or organization)

                                  627 BROADWAY
                               NEW YORK, NY 10012
               (Address of principal executive offices) (Zip Code)

                              --------------------

                          JUPITER COMMUNICATIONS, INC.
                            1999 STOCK INCENTIVE PLAN
                        1999 EMPLOYEE STOCK PURCHASE PLAN
                                1997 OPTION PLAN
                            (Full title of the Plans)

                              --------------------

                                   GENE DEROSE
                             CHIEF EXECUTIVE OFFICER
                          JUPITER COMMUNICATIONS, INC.
                        627 BROADWAY, NEW YORK, NY 10012
                     (Name and address of agent for service)
                            TELEPHONE (212) 780-6060
                            FACSIMILE (212) 780-6075
          (Telephone number, including area code, of agent for service)

                         CALCULATION OF REGISTRATION FEE
=================================================================================================================================
                                                                                          PROPOSED MAXIMUM
                                          AMOUNT TO BE     PROPOSED MAXIMUM OFFERING      AGGREGATE OFFERING         AMOUNT OF
 TITLE OF SECURITIES TO BE REGISTERED    REGISTERED (1)        PRICE PER SHARE                 PRICE            REGISTRATION FEE
----------------------------------------------------------------------------------------------------------------------------------
1999 Stock Incentive Plan
Common Stock, $0.01 par value           5,000,000 shares         $34.625(2)             $173,125,000.00(2)       $48,128.75

----------------------------------------------------------------------------------------------------------------------------------

1999 Employee Stock Purchase Plan
Common Stock $0.01 par value              500,000 shares         $34.625(2)             $ 17,312,500.00(2)       $ 4,812.88

----------------------------------------------------------------------------------------------------------------------------------

1997 Option Plan
Common Stock $0.01 par value            2,658,869 shares         $   3.65(3)            $  9,704,871.85(3)       $ 2,697.95

----------------------------------------------------------------------------------------------------------------------------------

                                        8,158,869 shares                             Aggregate Registration Fee: $55,639.58

=================================================================================================================================
(1)  This Registration Statement shall also cover any additional shares of
     Common Stock which become issuable under the Jupiter Communications, Inc.
     1999 Stock Incentive Plan, 1999 Employee Stock Purchase Plan and 1997
     Option Plan by reason of any stock dividend, stock split, recapitalization
     or other similar transaction effected without the Registrant's receipt of
     consideration which results in an increase in the number of the outstanding
     shares of Registrant's Common Stock.
2

(2)  Calculated solely for purposes of this offering under Rule 457(h) of the
     Securities Act of 1933, as amended, on the basis of the average of the high
     and low selling prices per share of Registrant's Common Stock on
     November 16, 1999, as reported by the Nasdaq National Market.

(3)  Calculated solely for purposes of this offering under Rule 457(h) of the
     Securities Act of 1933, as amended, on the basis of the weighted average
     exercise price of the outstanding options.

                                      II-2
3

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference

         Jupiter Communications, Inc. (the "Registrant") hereby incorporates by
reference into this Registration Statement the following documents previously
filed with the Securities and Exchange Commission (the "SEC"):

         (a)      The Registrant's Prospectus filed with the SEC pursuant to
                  Rule 424(b) promulgated under the Securities Act of 1933, as
                  amended, filed with the SEC on October 8, 1999, in connection
                  with the Registrant's Registration Statement No. 333-84175, in
                  which there is set forth the audited financial statements for
                  the Registrant's fiscal year ended December 31, 1998;

         (b)      The Registrant's Registration Statement No. 000-27537 on Form
                  8-A12G filed with the SEC on October 4, 1999 in which there is
                  described the terms, rights and provisions applicable to the
                  Registrant's outstanding Common Stock.

         All reports and definitive proxy or information statements filed
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of
1934, as amended, (the "1934 Act") after the date of this Registration Statement
and prior to the filing of a post-effective amendment which indicates that all
securities offered hereby have been sold or which deregisters all securities
then remaining unsold shall be deemed to be incorporated by reference into this
Registration Statement and to be a part hereof from the date of filing of such
documents. Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Registration Statement to the extent that a statement
contained herein or in any subsequently filed document which also is deemed to
be incorporated by reference herein modifies or supersedes such statement. Any
such statement so modified or superseded shall not be deemed, except as so
modified or superseded, to constitute a part of this Registration Statement.

Item 4.  Description of Securities

         Not Applicable.

Item 5.  Interests of Named Experts and Counsel

         Not Applicable.

Item 6.  Indemnification of Directors and Officers

         The registrant's certificate of incorporation, as amended and restated,
in effect as of the date hereof, provides that, except to the extent prohibited
by the Delaware General Corporation Law, as amended (the "DGCL"), the
registrant's directors shall not be personally liable to the registrant or its
stockholders for monetary damages for any breach of fiduciary duty as directors
of the registrant. Under the DGCL, the directors have a fiduciary duty to the
registrant which is not eliminated by this provision of the Certificate and, in
appropriate circumstances, equitable remedies such as injunctive or other forms
of non-monetary relief will remain available. In addition, each director will
continue to be subject to liability under the DGCL for breach of the director's
duty of loyalty to the registrant, for acts or omissions which are found by a
court of competent jurisdiction to be not in good faith or involving intentional
misconduct, for knowing violations of law, for actions leading to improper
personal benefit to the director, and for payment of dividends or approval of
stock repurchases or redemptions that are prohibited by DGCL. This provision
also does not affect the directors' responsibilities under any other laws, such
as the Federal securities laws or state or Federal environmental laws.

         Section 145 of the DGCL empowers a corporation to indemnify its
directors and officers and to purchase insurance with respect to liability
arising out of their capacity or status as directors and officers, provided that
this provision shall not eliminate or limit the liability of a director: (i) for
any breach of the director's duty of loyalty to the corporation or its
stockholders, (ii) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) arising under
Section 174 of the DGCL, or (iv) for any transaction from which the director
derived an improper personal benefit. The DGCL provides further that the
indemnification

                                      II-1
4

permitted thereunder shall not be deemed exclusive of any other rights to which
the directors and officers may be entitled under the corporation's bylaws, any
agreement, a vote of stockholders or otherwise. The Certificate eliminates the
personal liability of directors to the fullest extent permitted by Section
102(b)(7) of the DGCL and provides that the registrant shall fully indemnify any
person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding (whether civil,
criminal, administrative or investigative) by reason of the fact that such
person is or was a director or officer of the registrant, or is or was serving
at the request of the registrant as a director or officer of another
corporation, partnership, joint venture, trust, employee benefit plan or other
enterprise, against expenses (including attorney's fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by such person in
connection with such action, suit or proceeding.

         At present, there is no pending litigation or proceeding involving any
director, officer, employee or agent as to which indemnification will be
required or permitted under the Certificate. The registrant is not aware of any
threatened litigation or proceeding that may result in a claim for such
indemnification.

Item 7.  Exemption from Registration Claimed

         Not Applicable.

Item 8.  Exhibits
Number                           Exhibit
------                           -------
4         Instruments Defining Rights of Stockholders. Reference is made to
          Registrant's Registration Statements No. 000-27537 on form 8-A12G
          which is incorporated herein by reference pursuant to Item 3(b).

5         Opinion and consent of Brobeck, Phleger & Harrison LLP.

23.1      Consent of KPMG LLP, Independent Accountants.

23.2      Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.

24        Power of Attorney. Reference is made to page II-4 of this Registration
          Statement.

99.1      Jupiter Communications, Inc. 1999 Stock Incentive Plan.

99.2      Jupiter Communications, Inc. 1999 Employee Stock Purchase Plan.

99.3      Jupiter Communications, Inc. 1997 Option Plan.
Item 9.  Undertakings.

         A. The undersigned Registrant hereby undertakes: (1) to file, during
any period in which offers or sales are being made, a post-effective amendment
to this Registration Statement (i) to include any prospectus required by Section
10(a)(3) of the 1933 Act, (ii) to reflect in the prospectus any facts or events
arising after the effective date of this Registration Statement (or the most
recent post-effective amendment thereof) which, individually or in the
aggregate, represent a fundamental change in the information set forth in this
Registration Statement and (iii) to include any material information with
respect to the plan of distribution not previously disclosed in this
Registration Statement or any material change to such information in this
Registration Statement; provided, however, that clauses (1)(i) and (1)(ii) shall
not apply if the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed by the
Registrant pursuant to Section 13 or Section 15(d) of the 1934 Act that are
incorporated by reference into this Registration Statement; (2) that for the
purpose of determining any liability under the 1933 Act each such post-effective
amendment shall be deemed to be a new registration statement relating to the
securities offered therein and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof; and (3) to remove
from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the Jupiter
Communications, Inc. 1999 Stock Incentive Plan, 1999 Employee Stock Purchase
Plan and 1997 Option Plan.

                                      II-2
5

         B. The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the 1933 Act, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference into this Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

         C. Insofar as indemnification for liabilities arising under the 1933
Act may be permitted to directors, officers, or controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that, in the opinion of the SEC, such indemnification is
against public policy as expressed in the 1933 Act, and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer, or controlling person of the Registrant in the
successful defense of any action, suit, or proceeding) is asserted by such
director, officer, or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the 1933 Act and will be governed by the final
adjudication of such issue.

                                      II-3
6

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-8, and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of New York, State of New York on this 23rd day of
November, 1999.

                                     JUPITER COMMUNICATIONS, INC.

                                     By: /s/ Gene DeRose
                                        ---------------------------
                                         Gene DeRose
                                         Chief Executive Officer

                                POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS:

         That the undersigned officers and directors of Jupiter Communications,
Inc., a Delaware corporation, do hereby constitute and appoint Gene DeRose,
Chief Executive Officer, and Jean Robinson, Chief Financial Officer, and each of
them, the lawful attorneys-in-fact and agents with full power and authority to
do any and all acts and things and to execute any and all instruments which said
attorneys and agents, and any one of them, determine may be necessary or
advisable or required to enable said corporation to comply with the Securities
Act of 1933, as amended, and any rules or regulations or requirements of the
Securities and Exchange Commission in connection with this Registration
Statement. Without limiting the generality of the foregoing power and authority,
the powers granted include the power and authority to sign the names of the
undersigned officers and directors in the capacities indicated below to this
Registration Statement, to any and all amendments, both pre-effective and
post-effective, and supplements to this Registration Statement, and to any and
all instruments or documents filed as part of or in conjunction with this
Registration Statement or amendments or supplements thereof, and each of the
undersigned hereby ratifies and confirms that all said attorneys and agents, or
any one of them, shall do or cause to be done by virtue hereof. This Power of
Attorney may be signed in several counterparts.

         IN WITNESS WHEREOF, each of the undersigned has executed this Power of
Attorney as of the date indicated.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities and on the dates indicated.
Signature                Title                                     Date
---------                -----                                     ----
/s/ Gene DeRose
---------------------   Chief Executive Officer and Chairman       November 23, 1999
Gene DeRose             of the Board of Director (Principal
                        Executive Officer)

/s/ Kurt Abrahamson
---------------------   President, Chief Operating Officer and     November 23, 1999
Kurt Abrahamson         Director

/s/ Jean Robinson
---------------------   Chief Financial Officer (Principal         November 23, 1999
Jean Robinson           Financial and Accounting Officer)
II-4
7
/s/ Robert Kavner
---------------------   Director                                   November 23, 1999
Robert Kavner

/s/ Jeff Ballowe
---------------------   Director                                   November 23, 1999
Jeff Ballowe
II-5
8

                       SECURITIES AND EXCHANGE COMMISSION

                                WASHINGTON, D.C.

                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933

                          JUPITER COMMUNICATIONS, INC.
9

                                  EXHIBIT INDEX
Number                           Exhibit
------                           -------
4         Instruments Defining Rights of Stockholders. Reference is made to
          Registrant's Registration Statements No. 000-27537 on form 8-A12G
          which is incorporated herein by reference pursuant to Item 3(b).

5         Opinion and consent of Brobeck, Phleger & Harrison LLP.

23.1      Consent of KPMG LLP, Independent Accountants.

23.2      Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.

24        Power of Attorney. Reference is made to page II-4 of this Registration
          Statement.

99.1      Jupiter Communications, Inc. 1999 Stock Incentive Plan.

99.2      Jupiter Communications, Inc. 1999 Employee Stock Purchase Plan.

99.3      Jupiter Communications, Inc. 1997 Option Plan.