head to head · open source
lancedb vs opencode-mem
lancedb has 11,666 GitHub stars, 1,110 forks, 627 open issues and last shipped today. opencode-mem has 1,739 stars, 175 forks, 6 open issues and last shipped yesterday. lancedb leads on adoption by 571% (11,666 vs 1,739 stars). lancedb is written in Rust under Apache-2.0; opencode-mem is written in TypeScript under MIT. lancedb has attracted 10% as many forks as stars, opencode-mem 10%. lancedb was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (vector-database), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| lancedb | opencode-mem | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.7K |
| License | Apache-2.0 | MIT |
| Written in | Rust | TypeScript |
| Last push | 2026-10-14 | 2026-10-13 |
| Forks | ⑂ 1.1K | ⑂ 175 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick lancedb if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick opencode-mem if
- You want the opencode-mem feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and opencode-mem fits your workflow better
About lancedb
LanceDB is an open source, developer friendly embedded retrieval library for multimodal AI, maintained in Rust and released under the Apache 2.0 license. It describes itself as a multimodal AI lakehouse: a single place where developers can build, train and analyze AI workloads over vectors, metadata and multimodal data such as text, images, videos and point clouds. It is built on top of the Lance columnar format, which provides the storage layer for efficient storage and analytics.
read the full lancedb overview →
About opencode-mem
opencode mem is an MIT licensed, TypeScript plugin for OpenCode that gives AI coding agents persistent memory across sessions by storing and searching vector embeddings in an embedded local Turso/libSQL database.
read the full opencode-mem overview →
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Frequently asked questions
Is lancedb or opencode-mem more popular?
lancedb has 11,666 GitHub stars and opencode-mem has 1,739. lancedb has the larger community by that measure.
Are lancedb and opencode-mem free?
Both are open source. lancedb is licensed under Apache-2.0 and opencode-mem under MIT. Neither carries a licence fee.
What is the difference between lancedb and opencode-mem?
lancedb is written in Rust and opencode-mem in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, lancedb or opencode-mem?
Choose lancedb if you want the larger community (11,666 stars) or its Apache-2.0 licence terms. Choose opencode-mem if its feature set, stack or MIT licence fits better. Both are self-hostable.