Switched from Litmus after some poor… Switched from Litmus after some poor customer service and aggressive sales calls. We tend to use for only HTML/CSS testing rather than the extended marketing tools but in terms of what we use it for I think it's been excellent so far and actually faster and more reliable than Litmus despite being much better value.

EoM doesn't handle multiple emails If you send more than one email to EoM "simultaneously", which seems to mean within the same second, it intermixes them, showing different emails for different rendered platforms, or no render (perpetual spinning circle) for some platforms. EoM said that I have to send the emails separately (by which, I think they mean take longer between emails.) That doesn't help me at all.

Email on Acid is a great tool in email… Email on Acid is a great tool in email development and has a lot of great features that help me trouble-shoot my code. I would like to see Acid improve its servers to be more responsive and be able to publish my tests in a faster fashion.

Does not support SAML 2.0 or OpenID… Does not support SAML 2.0 or OpenID Connect for SSO. Not ideal for the security of our proprietary info. No indication that its even on the roadmap at this point.

So helpful! Email on Acid had helped us optimize our emails across all devices and email platforms so that they render exactly how we want them too.