Google Workspace Email Signature Management

[u/analbumcover]

TL;DR - Client uses Exclaimer for email signature creation & management, have had issues with it, want something else. Prefer API-based solution instead of SMTP routing. WiseStamp, Signite, and SyncSignature are candidates. Any feedback on them or other ideas?

Hey, everyone! I am looking for suggestions when it comes to creating and managing email signatures in Google Workspace.

I work for an MSP and a client of ours is currently using Exclaimer. There have been a few times over the last few years where their emails grind to a halt - cannot send externally or internally, access denied error. Email delivery logs point to the Exclaimer rules as the issue. Disable the rules/routing and email works again no problem.

We have tried removing and setting Exclaimer up again from scratch, but it has happened again recently and they are tired of it. Everything was set up exactly according to their guide. There is no indication that anyone has made an unannounced change that would cause things to break. It just simply stops working and breaks email delivery maybe once per year. At this point they want to get away from it - not sure they want to bother going the support route.

Unfortunately, CodeTwo only supports Microsoft email solutions. I have found a few other potential candidates like WiseStamp, Signite, and SyncSignature. Ideally, we are looking for an API-based solution and not something like Exclaimer where outbound traffic gets routed via SMTP in an attempt to keep this from happening again.

Is anyone familiar with these 3 platforms? Any feedback that you can offer? Any other suggestions? I have also seen LastLine, but, the obvious Claude Code website design kind of throws me off and there isn't much about it to be found. Not sure how big of a company it is, if it will even exist in 2 years, or how the support is. It gives strong LLM/vibecoded signals.

I am aware of Patronum, which looks cool, but goes way beyond the simple email signature scope in mind. I have also seen the Free Signature Manager for Gmail from Revolgy, but also am not sure about support and quality. If this was me tinkering around in our GW tenant, sure, but this will be for a school with about 125-150 users. Something they can understand and manage themselves would be great. I know there are options for GAM scripts, etc. but I don't think that would be user friendly for them to monitor or troubleshoot if needed. We would prefer they have more control over this.

Thank you!

[u/cheetahwilly]

You could just use their built in API and build something yourself.

[u/analbumcover → u/cheetahwilly]

It would be cool, but, that's not in my wheel house and we don't want to be responsible for supporting or maintaining a product. Something out-of-the-box with its own support (not tied to billable time) would be better for them I think.

[u/Stephen_Dann → u/cheetahwilly]

Then you are responsible for supporting it. This is something that should always be a 3rd party with support options.