These two get compared because of the names. They are not variants of one another — they take fundamentally different approaches to the same wall, and the approach determines everything else about them.
The architectural difference, which is the whole comparison
BlueBubbles — a relay
- A server process on a Mac you own and keep running
- That Mac's Messages app does the actual sending
- Clients for Windows, Linux and Android talk to it
- Messages carry the Mac's Apple Account identity
- A local REST API, so software can drive it
OpenBubbles — a registration
- The Android handset talks to Apple's servers itself
- One-time access to a Mac or iPhone to register
- The blue bubble carries the Android phone's own number
- FaceTime as well as iMessage
- No API — it is a chat app, not infrastructure
| BlueBubbles | OpenBubbles | |
|---|---|---|
| Needs an always-on Mac | Yes | No — one-time registration only |
| Whose number the bubble shows | The Mac's Apple Account | The Android handset's own number |
| Cost | Free; you pay for the Mac and the electricity | Free self-hosted, or $16.99/month hosted |
| Automation API | Yes — local REST, webhooks | None |
| Group chats and tapbacks | Yes | Not clearly documented; verify |
| SMS fallback | No | No |
| Platforms | Windows, Linux, Android, web-adjacent clients | Android |
| Continuity risk | macOS updates break relays routinely | Registration is the pattern Apple has shut down before |
The risk is not the same risk
BlueBubbles fails the way a home server fails. macOS updates itself, something in the automation path changes, the Mac reboots into a login screen and nothing sends until someone walks over to it. Annoying, recoverable, and entirely under your control.
OpenBubbles carries a different exposure. Registering a non-Apple device with Apple's messaging service is precisely the thing Beeper Mini did in December 2023, and Apple shut that down within days. Whatever your view of the ethics, the operational read is unambiguous: this approach has an adversary who has acted before and can act again, on a timeline you do not control.
Both put your personal Apple Account on the table
Automating a consumer Apple Account is against Apple's terms, and account lockout is a real outcome rather than a theoretical one. That account probably also holds your photos, your backups and your purchases. Weigh the free software against what is on the other side of that login.
Which to pick, if you are picking
- You have a Mac and want your messages everywhere. BlueBubbles. Mature, open source, well documented, and the clients are good.
- You want to build something small against your own messages. BlueBubbles, and only BlueBubbles — OpenBubbles exposes nothing to build on. Beeper's Desktop API is the other option in that shape, with an MCP server included.
- You are on Android and tired of being green. OpenBubbles is the only project that solves that under your own number rather than relaying someone else's identity.
- You have no Mac and no iPhone at all. Neither works. There is no route to iMessage that does not touch Apple hardware somewhere.
If this is for a business, stop here
Both of these are personal tools, and the failure modes that make them charming as hobby projects are disqualifying as infrastructure: a personal number instead of a business line, an Apple Account that is one enforcement action from gone, no delivery reporting, no SMS fallback so Android customers are simply unreachable, and a Mac in a cupboard as your single point of failure.
The hosted equivalent starts at $19/month and moves all of that onto somebody else's hardware and somebody else's Apple accounts. Hosted API vs self-hosted bridge works through the trade in full, and the cheapest hosted options is the short version.
Common questions
- What is the difference between OpenBubbles and BlueBubbles?
- BlueBubbles runs a server on a Mac signed into your Apple Account and relays that Mac's Messages app to clients on other platforms — your messages still come from the Mac's identity. OpenBubbles registers the Android device itself with Apple's servers, so the blue bubble carries the Android phone's own number. BlueBubbles needs the Mac permanently; OpenBubbles needs a Mac or iPhone once, to register.
- Is OpenBubbles a fork of BlueBubbles?
- No. The names invite the assumption, but they are separate projects solving different problems. BlueBubbles is a relay; OpenBubbles is a registration client.
- Can I use either one for business messaging?
- No, and both projects are clear about what they are. BlueBubbles has an API but sends from your personal number and personal Apple Account. OpenBubbles has no API at all. Both automate a consumer account in a way Apple's terms do not permit, and both fail in a way that takes your Apple Account with them.