<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS OF JUNO ONLINE SERVICES, INC. AND
SUBSIDIARY FOUND IN THE COMPANY'S FORM 10-Q AS OF AND FOR THE THREE MONTHS ENDED
MARCH 31, 2000.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                         128,818
<SECURITIES>                                         0
<RECEIVABLES>                                   10,612
<ALLOWANCES>                                       703
<INVENTORY>                                          0
<CURRENT-ASSETS>                               152,015
<PP&E>                                          10,619
<DEPRECIATION>                                   3,797
<TOTAL-ASSETS>                                 159,266
<CURRENT-LIABILITIES>                           51,468
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           386
<OTHER-SE>                                     205,706
<TOTAL-LIABILITY-AND-EQUITY>                   159,266
<SALES>                                         24,047
<TOTAL-REVENUES>                                24,047
<CGS>                                           14,646
<TOTAL-COSTS>                                   14,646
<OTHER-EXPENSES>                                58,749
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  44
<INCOME-PRETAX>                               (47,626)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (47,626)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (47,626)
<EPS-BASIC>                                     (1.28)
<EPS-DILUTED>                                   (1.28)