Observed arrival · 2026-09-21
fenecdb, a Vector Database in a Browser Tab
An embedded vector database written in Rust that runs as 370 KB of WebAssembly or as a PostgreSQL-speaking process.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers embedding vector search in small applications
- Worth noticing
- The page reports 370 KB of dependency-free WebAssembly and a 117 ms reopen time for its benchmark database.
Field notes
fenecdb exposes a browser playground alongside documentation, source links, and benchmark tables; its query syntax treats vectors as a type, `near` as a clause, and HNSW as a built-in index. The homepage reports 370 KB of dependency-free WebAssembly and compares 100,000-row workloads against SQLite and PostgreSQL with pgvector. Its design is deliberately constrained: one writer per file, no joins or transactions, and the whole file must fit in memory.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue