Exhibit 31

CERTIFICATIONS

I, Karen A. Richardson, certify
  that:

| |  | 1. | I
      have reviewed this quarterly report on Form 10-Q of E.piphany, Inc.;                                                                                                                                                                                                                                                      
| |  | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |  | 2. | Based
      on my knowledge, this report does not contain any untrue statement of a
      material fact or omit to state a material fact necessary to make the statements
      made, in light of the circumstances under which such statements were made,
      not misleading with respect to the period covered by this report;
| |  | 3. | Based
      on my knowledge, the financial statements, and other financial information
      included in this report, fairly present in all material respects the financial
      condition, results of operations and cash flows of the registrant as of,
      and for, the periods presented in this report;                   
| |  | 4. | The
      registrants other certifying officer and I are responsible for establishing
      and maintaining disclosure controls and procedures (as defined in Exchange
      Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:                                                                                     
| |  |    | (a)                                                                                                                                                                                                                                                                                                                               
| |  |    | (b)                                                                                                                                                                                                                                                                                                                               
| |  |    | (c)                                                                                                                                                                                                                                                                                                                               
| |  | 5. | The
      registrants other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the registrants auditors and the audit committee of the registrants
      board of directors (or persons performing the equivalent functions):           
| |  |    | (a)                                                                                                                                                                                                                                                                                                                               
| |  |    | (b)                                                                                                                                                                                                                                                                                                                               

|Date: August
      13, 2003 |                                                  
|--------------------------- | -------------------------------------------------
|                            | /s/ Karen
      A. Richardson                    
|                            |                                                  
|                            | Karen A. Richardson
      Chief Executive Officer

40

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I, Kevin J. Yeaman, certify
  that:

| |  | 1. | I
      have reviewed this quarterly report on Form 10-Q of E.piphany, Inc.;                                                                                                                                                                                                                                                      
| |  | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |  | 2. | Based
      on my knowledge, this report does not contain any untrue statement of a
      material fact or omit to state a material fact necessary to make the statements
      made, in light of the circumstances under which such statements were made,
      not misleading with respect to the period covered by this report;
| |  | 3. | Based
      on my knowledge, the financial statements, and other financial information
      included in this report, fairly present in all material respects the financial
      condition, results of operations and cash flows of the registrant as of,
      and for, the periods presented in this report;                   
| |  | 4. | The
      registrants other certifying officer and I are responsible for establishing
      and maintaining disclosure controls and procedures (as defined in Exchange
      Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:                                                                                     
| |  |    | (a)                                                                                                                                                                                                                                                                                                                               
| |  |    | (b)                                                                                                                                                                                                                                                                                                                               
| |  |    | (c)                                                                                                                                                                                                                                                                                                                               
| |  | 5. | The
      registrants other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the registrants auditors and the audit committee of the registrants
      board of directors (or persons performing the equivalent functions):           
| |  |    | (a)                                                                                                                                                                                                                                                                                                                               
| |  |    | (b)                                                                                                                                                                                                                                                                                                                               

|Date: August
      13, 2003 |                                              
|--------------------------- | ---------------------------------------------
|                            | /s/ Kevin
      J. Yeaman                    
|                            |                                              
|                            | Kevin J. Yeaman
      Chief Financial Officer

41

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