Private by architecture

Your circles.
Your identities.
Your terms.

Invite-only circles with circle-scoped pseudonyms. No global account. The server can't link you across circles.

Built different from the ground up

Most platforms bolt on privacy as an afterthought. Bastion was designed around it from the first line of code.

Anonymous by default

No email, phone number, or name required. Your identity lives on your device.

Context isolation

Each circle sees a completely different identity. No global account. No cross-circle linkage. Your circles are cryptographically separated — not by policy, by design.

Invite-only circles

Bastion communities are intentional. Every circle is private, curated, and built for productive conversation — not engagement metrics.

Every circle is a bastion

One person. Many circles. Unlinkable across them.

W
Work Circle
a7f3…c921
H
Hobby Circle
e4b1…8d07
S
Support Circle
f092…1a5e

Same person. Three circles. Three separate cryptographic identities. Designed to be unlinkable.

There are no global accounts on Bastion. Each circle sees a completely separate identity — one that is not linkable to your identity in any other circle.

The server can't link your identity across circles. Circle-scoped pseudonyms: different name, different key in each circle.

Your circles stay separate. Not by policy. By design.

Not another "private" messenger

Other platforms encrypt your messages. Bastion isolates your entire identity.

Other platforms

Require email or phone to sign up
One global identity across all groups
Server knows your group memberships
Privacy as a policy promise

Bastion

No personal info required to create an account
Separate cryptographic identity per circle
Memberships encrypted on-device, opaque to server
Cryptographic identity isolation by design
Posts are stored on the server (not end-to-end encrypted today). The core privacy property is identity isolation — the server can’t link you across circles or to a global account.

Ready for circles that stay yours?

Create an account in seconds. No email. No phone. Just privacy-first communities.

Open Bastion →