Souspli
Signed, self-contained letters that people send each other and keep — instead of pages a server renders for them.
A Souspli letter is one file. It carries its own content, images, layout and behaviour, and its author's signature covers all of it. You open it in a sealed container that has no network, so it can be as interactive as a web page and still cannot report on you. You can hand it on by any channel — a file, a paste, a torrent, a relay — and whoever receives it can verify it without asking anyone.
Out of that one object you can build the things people use servers for: an article, an invitation, an invoice, a contract with four signatures, a club with a roster, a forum with threads, votes and moderation. No accounts, no host, nothing to shut down.
Status: experimental alpha. It works, it is tested hard, and it is not yet something to trust with anything valuable. What is and is not there.
Read this at the depth you want
| Why | What is wrong with the web's shape, and what a letter fixes. Start here if someone sent you a link. · Compared with Nostr, Mastodon, IPFS, PGP… · A very old idea |
| Use | What you can do with it today: write and send a letter, run a forum, sign a contract together, decide who you trust. |
| How | The protocol — format, signatures, sealing, admission — and the architecture of the desktop client, with its threat model and escape suite. |
| Next | What is coming soon, and the research directions: zero-knowledge membership, anonymous endorsements, identity proofs. |
Words used in these pages, and the names the code uses for the same things, are in the glossary.