Audit it
Read the exact code that authenticates your app, holds your channel credentials and delivers your notifications. No black box between you and your users.
Open source
Open by default. Sovereign by design.
The palumb core is open source. Audit every line, self-host the whole platform on your own EU infrastructure, or let us run it for you — the same workflows either way.
What's open
The same core powers the managed service and your self-host.
palumb's control plane — the part that authenticates your app, knows your audience, holds your channels and delivers durably — is open source. There is no proprietary fork hiding behind the managed tiers: when you self-host, you run the same code we do. The managed plans exist so you don't have to operate it — and they fund the core's continued development — not because the important parts are locked away.
The whole core is released under the GNU AGPL-3.0 — the strong-copyleft licence that keeps the platform open even when it's offered as a managed service.
Self-host it
Run the entire control plane and durable runtime on your own EU infrastructure, for free. Same workflows, your hardware, zero licence cost.
Self-hosting docs →Contribute
Issues, pull requests and discussions are welcome. The roadmap is in the open, and the people who run palumb read every report.
Open an issue →Standing on open source
palumb's durable runtime is Restate — itself open source. Durability, timers and idempotency are battle-tested infrastructure, not something we reinvented.
How durability works →No lock-in
Your exit is built in.
Sovereignty isn't only about where the servers are — it's whether you can run the software without us. Because the core is open source, you're never hostage to palumb: if we changed direction, raised prices you didn't like, or simply disappeared, you take the same code and run it on your own EU infrastructure. No rip-and-replace, no proprietary format holding your workflows, no data you can't get back.
That's the difference between a vendor that says it's European and one whose independence you can actually enforce. Open source is what makes the sovereignty real, not just a hosting choice.
Run it on your own EU infrastructure.
Self-host the entire control plane and durable runtime — no licence cost, no feature gate. Bring your own EU region and keep everything in your perimeter.