Contact
One address, read by the person building this: hello@signunder.com. There is no contact form, because a form that quietly drops your message is worse than no form.
You ship AI generation and want to talk about it
This is the most useful email we can get right now. We are interviewing companies that generate images, audio or video under their own brand, to work out whether Signunder is worth building. Twenty minutes, no pitch, and you get our platform research in return.
Something here is wrong or out of date
The platform coverage table and the dates are read from primary sources and will drift. If you know a platform has started marking, or a policy has changed, tell us and we will correct it and date the correction.
You want a self-hosted deployment
Running the signing path inside your own cloud and key store, with support attached. Worth a conversation even while the hosted service is pre-launch.
Signunder is pre-launch and built by one person, so replies come from a human and may take a day or two.
Be marking by 2 December
Signunder is being built now, in the open. Leave your email and we will tell you when the free checker and the signing API are live, and nothing else.
One address, used only to tell you when Signunder is ready. No newsletter, no sharing with anyone.