Try Signal Protocol

This is the handshake library Glitr is willing to publish.

Run the handshake in the browser, then read the source.

Open the Signal experience
Source code

Run key exchange and a ratchet in the browser. Read the tests and the proofs in the repository if that is how you trust software.

It is not a claim that Glitr is audited, and not a claim of compatibility with the Signal messenger. It is the one place this product says: look at the code.

How it fits: Signal Protocol and the post-quantum path.