MIT open source

Software for everyone

Software improves when everyone can inspect, share, and contribute to the tools they depend on. Our work started in the open source, and we intend to keep contributing.

github.com/feyninc
Ingestion

Chonkie

An ingestion library for robust context engineering. Clean, chunk, embed, and store your data in a few lines of code.

Chonkie logo
Chunking engine

Memchunk

Memchunk logo

Chunk at the speed of memory. Up to 1TB/s throughput powered by SIMD delimiter search, lookup tables, and zero-copy bindings.

Embeddings client

Catsu

Catsu logo

A lightweight unified embeddings client. Enjoy a consistent API across all providers with built-in retries, usage tracking, and cost monitoring.

Benchmark

MTCB

Massive Text Chunking Benchmark
MTCB logo

Measure retrieval quality across 9 different domains. Test the context you give your agents.

Contributors welcome

Use our tools, shape what comes next