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
Protus/Campaigner Email Marketing
Constant Contact
e-Dialog
PulsePoint

Members:

Act-On Software
ADRevolution
Benchmark Email Service
Blackbaud, Inc.
BlueHornet Networks, Inc.
ClickSquared (formerly Click Tactics)
Cypra Media Inc.
Eloqua
Emailvision SA
Emma Email Marketing
Epsilon
eWayDirect, Inc.
ExactTarget
Experian CheetahMail
ExpertSender
Express Email Marketing
Hallmark Data Systems
Harte-Hanks Postfuture, Inc.
Implix / GetResponse.com
Knotice
LifeScript
Listrak
Lyris Technologies
MediaWhiz Holdings, Inc.
Merkle
Neolane, Inc.
Port25 Solutions, Inc.
Puresend, Inc.
Responsys
Results Generation Group, LLC
Return Path
RightNow Technologies
The Rocket Science Group, LLC (MailChimp)
Market Leader, Inc. (formerly SharperAgent, LLC)
Silverpop
Splio Development (US)
StreamSend Email Marketing
StrongMail Systems
SubscriberMail, LLC
VerticalResponse
Yesmail
Zeta Interactive