Membership in the Email Sender and Provider Coalition is open to email service providers. For more information regarding membership, please contact us at membership@espcoalition.org.

Founding Members:

Acxiom | Digital
Campaigner Email Marketing
CheetahMail (an Experian company)
Constant Contact (formerly Roving Software)
Datran Media
e-Dialog
Prospectiv
Return Path

Members:

1ShoppingCart.com
24/7 Real Media
Acxiom
Advertising.com
ADRevolution
Alterian
aQuantive
Bamboo Cricket
Benchmark Email Service
Blackbaud, Inc.
BlueHornet Networks, Inc.
Cabela’s, Inc.
Click Tactics (formerly Britemoon)
Cypra Media Inc.
Digital Connexxions
Emailbrain / eMail Logics, Inc.
EmailLabs
Emma Email Marketing
Epsilon
eWayDirect, Inc.
ExactTarget
Exmplar, Inc.
Fishbowl Marketing
Goodmail Systems
Hallmark Data Systems
Habeas, Inc.
Harte-Hanks Postfuture, Inc.
IMN
Implix / GetResponse.com
Internet Marketing Center
Ipsos Interactive Services NA / Ipsos Direct
IronPort Systems
JangoMail
Knowledge Marketing
LashBack, LLC
LifeScript
Listrak
Lyris Technologies
MediaWhiz Holdings, Inc.
Message Systems (formerly OmniTI, LLC.)
Microsoft Corporation
mobileStorm, Inc.
NetCreations, Inc.
Port25 Solutions, Inc.
Postmaster Direct
Premiere Global Services, Inc.
Procter & Gamble
Proffiliates, Inc.
Puresend, Inc.
Q Interactive (formerly CoolSavings Inc.)
Quotient Marketing
Quris
Real Magnet, LLC.
Responsys
Results Generation
RightNow Technologies
The Rocket Science Group, LLC (MailChimp)
Savicom
SharperAgent, LLC
Silverpop
SKYLIST
StreamSend Email Marketing
StrongMail Systems
SubscriberMail, LLC
Topica
Traffix, Inc.
VerticalResponse
Virtumundo
Vtrenz, Inc.
Webmail.us, Inc.
WhatCounts, Inc.
Yesmail
Zustek Corporation