sqlite-vec vs USearch
sqlite-vec: Dependency-free SQLite extension for vector search that runs anywhere SQLite does, including WASM. USearch: Single-header C++ HNSW library with SIMD distance kernels and bindings for a dozen languages.
key differences
- USearch is built for larger datasets (≤ 1 PB) than sqlite-vec (≤ 100 GB).
- Horizontal scaling is none in sqlite-vec and manual in USearch.
- Transactions: sqlite-vec offers full ACID; USearch offers none.
- Only sqlite-vec has transactions, joins, secondary indexes, full-text search, json.
- Only USearch has compression.
choose sqlite-vec for
- +On-device RAG in desktop and mobile apps
- +Local-first semantic search
- +Browser-based vector search via WASM
- +Small server apps already on SQLite or libSQL
best at · Vector search, RAG, Embedded
choose usearch for
- +Embedding ANN search into a database or application
- +On-device semantic search on mobile
- +Fast similarity joins and clustering in data pipelines
best at · Vector search, Embedded, Edge
sqlite-vec vs USearch: FAQ
What is the difference between sqlite-vec and USearch?
sqlite-vec: Dependency-free SQLite extension for vector search that runs anywhere SQLite does, including WASM. USearch: Single-header C++ HNSW library with SIMD distance kernels and bindings for a dozen languages. USearch is built for larger datasets (≤ 1 PB) than sqlite-vec (≤ 100 GB). Horizontal scaling is none in sqlite-vec and manual in USearch. Transactions: sqlite-vec offers full ACID; USearch offers none.
When should I choose sqlite-vec over USearch?
Choose sqlite-vec for on-device RAG in desktop and mobile apps; local-first semantic search; and browser-based vector search via WASM. Choose USearch for embedding ANN search into a database or application; on-device semantic search on mobile; and fast similarity joins and clustering in data pipelines.
Is sqlite-vec or USearch more popular?
sqlite-vec ranks #81 on the WhichDB Score (31.1/100) and USearch ranks #132 (23.1/100). Popularity is not fit: check the requirements that matter for your project.
Are sqlite-vec and USearch open source?
Yes. sqlite-vec is open source. License: MIT or Apache-2.0 (dual). Yes. USearch is open source. License: Apache License 2.0.