Does it use some client, what do I need to install on my devices (if supported) and what permissions does it need etc? Instead I'm greeted by a login page.

It's not transparent enough for me how the product is used before signing up and that's a huge turn off.

https://github.com/bjesus/clapboard

In cases where iOS/macOS misbehave, I use (IMAP) email without sending anything:

- create new mail message

- paste text or add attachments

- save as draft

- open draft on other device

- copy out the data

- delete draft

Works reliably for not-too-large items

.>client apps are not open source

.>data-deletion page seems to imply servers are storing images/files copied to the clipboard

.>"end-to-end encrypted" in the marketing materials.

I would add examples how data encryption works. This is so sensitive topic. But if you explain it nicely, people could use the service.

I would add FAQ. Boxes seem like I can read more but I can’t.

If I do want to move some info i'll message it to myself thank you.

Would you mind sharing the source code?

> Copy API keys

...yeah, I think that'd be a hard requirement. I don't think there is value in a cliboard-as-a-SaaS that is not self-hostable.