EXHIBIT 10.18

                                                     November 6, 2002
DIVCO West Group, LLC
San Tomas Properties, LLC
150 Spear Street
San Francisco, CA 94105

    Re:  Office Lease

Dear Sir or Madam:

     Reference  is made to that  certain  Office  Lease by and between San Tomas
Properties,  LLC ("Landlord") and Akamai Technologies,  Inc.  ("Akamai"),  dated
June 30, 2000 (the  "Lease") and ongoing  discussions  of the parties  regarding
restructuring  of the same.  All  capitalized  terms used and not defined herein
shall  have the  meanings  given to them in the Lease.  This is to  confirm  the
agreement of the parties that  effective  upon receipt by Landlord of payment of
Rent for the month of October 2002 in the amount of  $$578,811.39,  such payment
date shall be  retroactive,  and such payment  shall be  considered to have been
made under the Lease without default, nunc pro tunc, as of October 1, 2002. Also
effective upon receipt of such payment by Landlord,  Landlord waives any default
that may have  occurred  relating to delay in payment of Rent for October  2002.
All other  provisions  of the Lease shall  remain in full force and  effect.  By
signing in the space  provided  below,  you represent that you are authorized to
sign this letter agreement on behalf of Landlord, and you agree to the terms set
forth above.

                                           Very truly yours,

                                           Akamai Technologies, Inc.

                                           By: /s/ Akamai Technologies, Inc.
                                              ----------------------------------
                                              Name:  Kathryn J. Meyer
                                              Title:  VP, General Counsel
Agreed and Acknowledged:

San Tomas Properties, LLC

/s/ San Tomas Properties LLC
- --------------------------------------
Name:  Stuart Shiff
Title: Authorized Signatory
Date:  11-06-02