Session is dead simple and silent. No phone, no email, no metadata, routed through the Oxen mixnet so not even the devs can trace who you are. But it’s slower, clunkier, and not ideal for file-heavy workflows.

SimpleX, on the other hand, is slick, fast, and peer-to-peer with full end-to-end encryption but it still depends on invitation links and has a steeper learning curve for normies. If you want maximum anonymity, use Session. If you want practical secure messaging with clients or collaborators SimpleX wins.

Different tools. Different trust models. Pick based on your threat, not your vibe.