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:

ADRevolution
Alterian
Benchmark Email Service
Blackbaud, Inc.
BlueHornet Networks, Inc.
ClickSquared (formerly Click Tactics)
Cypra Media Inc.
Eloqua
Emailvision SA
Emfluence, LLC
Emma Email Marketing
Epsilon
eWayDirect, Inc.
ExactTarget
Experian CheetahMail
ExpertSender
Express Email Marketing
Goodmail Systems
Hallmark Data Systems
Harte-Hanks Postfuture, Inc.
IMN
Implix / GetResponse.com
JangoMail
Knotice
LashBack, LLC
LifeScript
Listrak
Lyris Technologies
MediaWhiz Holdings, Inc.
Merkle
Message Systems (formerly OmniTI, LLC.)
Neolane, Inc.
Port25 Solutions, Inc.
Premiere Global Services, Inc.
Procter & Gamble
Proffiliates, Inc.
Prospectiv
Puresend, Inc.
Real Magnet, LLC.
Responsys
Return Path
RightNow Technologies
The Rocket Science Group, LLC (MailChimp)
SharperAgent, LLC
Silverpop
Splio Development (US)
StreamSend Email Marketing
StrongMail Systems
SubscriberMail, LLC
VerticalResponse
WhatCounts, Inc.
Yesmail
Zeta Interactive