Show HN: Self-hosted Spanner-like database that speaks Redis (opens in new tab)

Almost 10 years ago, I was working on two projects: a space game that simulated relativity and a "dead man's switch" in case I died. I realized two things back then:

1. If I wanted to leave a message for my son in 30 years, I couldn't make any assumptions about technology in the future.

2. No database is unkillable.

Over the coming decade, I set out to figure out how to build a leaderless database that could go "holographic" -- any partition could create a completely independent cluster -- while simultaneously acting like any other database. It was a long journey with a lot of dead ends and then suddenly there weren't.

The last year has been a whirlwind of progress, resulting in Swytch, licensed under the AGPL. A drop-in replacement for Redis clusters, with almost 100% command coverage (some lua stuff and debug commands are not implemented, see the docs[1]). It passes self-built Jepsen tests, the underlying system is proven correct through TLA+, and we've written a paper about the underlying framework Swytch is built on[2].

No clock-sync required.

Ask me anything

[1]: https://docs.getswytch.com

[2]: https://arxiv.org/abs/2605.09114