Sauna Uses 2 Million Turso Databases to Isolate AI Assistant Contexts
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Since launching its AI work assistant in April 2026, Sauna has created more than 2 million Turso databases, adding about 90,000 new ones per day. Each session, agent, and each connected inbox or calendar corresponds to a separate database; data is isolated per connection, preventing cross-user leaks without row-by-row filtering, and it supports local search of email and schedules. Sauna also uses a two-layer memory system and a self-built versioned file system to achieve "compounding context" across sessions. Sauna only switched to this architecture after Turso removed the active database limit on all paid plans in May 2026. According to Matthias, Sauna currently runs on the team's self-built infrastructure, and whether to migrate to Turso in the future is still under consideration; Sauna does not yet need one related capability, but he expects the team will experiment with it.
AI overview based on source reports · Updated 3 days ago
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- Hacker News AI2M databases and counting: the architecture behind Sauna's AI teammate
Sauna, a proactive AI work assistant launched in April 2026, gives every session, agent, connected inbox and calendar its own database, totaling over 2 million databases with about 90,000 created daily. The piece details how Sauna uses Turso Sync for chat histories and synced copies of inboxes and calendars, after earlier attempts with Cloudflare Durable Objects and Litestream, and explains how per-database isolation supports sharing, fast local search and retention. It also covers Sauna's plans to consider moving its in-house file system to Turso and to experiment with MVCC.
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