head to head · open source
Milvus vs Chat2DB
Milvus has 46,166 GitHub stars, 4,257 forks, 1,405 open issues and last shipped today. Chat2DB has 28,161 stars, 3,036 forks, 269 open issues and last shipped yesterday. Milvus leads on adoption by 64% (46,166 vs 28,161 stars). Milvus is written in Go under Apache-2.0; Chat2DB is written in Java under a custom or non-standard licence. Milvus has attracted 9% as many forks as stars, Chat2DB 11%. Milvus was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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
| Milvus | Chat2DB | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 28K |
| License | Apache-2.0 | Custom / other |
| Written in | Go | Java |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 4.3K | ⑂ 3.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Milvus if
- You weight community size — 46K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Chat2DB if
- You want the Chat2DB feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Java
- You evaluated both and Chat2DB fits your workflow better
About Milvus
Milvus is a high performance, cloud native vector database written in Go and C++, designed to power AI applications by efficiently storing, indexing, and searching large scale unstructured data such as text, images, and multi modal embeddings. It implements hardware accelerated approximate nearest neighbor (ANN) search using algorithms like HNSW, FAISS, and DiskANN, and supports both real time streaming updates and batch ingestion. Milvus lives in the GenAI infrastructure ecosystem, serving as the persistent storage and retrieval layer for embedding based workloads including RAG, recommendation, and image search.…
read the full Milvus overview →
About Chat2DB
Chat2DB is a free, cross platform, AI powered database client and SQL workspace from OtterMind that turns natural language into SQL, built for developers, DBAs, analysts and data teams who want the tool running on their own machine rather than in a vendor's cloud.
read the full Chat2DB overview →
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Frequently asked questions
Is Milvus or Chat2DB more popular?
Milvus has 46,166 GitHub stars and Chat2DB has 28,161. Milvus has the larger community by that measure.
Are Milvus and Chat2DB free?
Both are open source. Milvus is licensed under Apache-2.0, and Chat2DB has no licence declared in this registry. Both are free to self-host.
What is the difference between Milvus and Chat2DB?
Milvus is written in Go and Chat2DB in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Milvus or Chat2DB?
Choose Milvus if you want the larger community (46,166 stars) or its Apache-2.0 licence terms. Choose Chat2DB if its feature set, stack or Custom / other licence fits better. Both are self-hostable.