head to head · open source
Milvus vs undb
Milvus has 46,166 GitHub stars, 4,257 forks, 1,405 open issues and last shipped today. undb has 2,982 stars, 156 forks, 56 open issues and last shipped 1.2 years ago. Milvus leads on adoption by 1,448% (46,166 vs 2,982 stars). Milvus is written in Go under Apache-2.0; undb is written in TypeScript under AGPL-3.0. Milvus has attracted 9% as many forks as stars, undb 5%. Milvus was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | undb | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 3.0K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Go | TypeScript |
| Last push | 2026-09-20 | 2025-07-13 |
| Forks | ⑂ 4.3K | ⑂ 156 |
| 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 undb if
- You want the undb feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and undb 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 undb
undb is a local first, offline first no code database platform that also serves as a backend as a service. It lives in the open source no code database and BaaS ecosystem, and it is written in TypeScript with SQLite as its database engine. The project provides a table management UI, and it can be packaged into a single binary with Bun or run as a Docker service.
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Frequently asked questions
Is Milvus or undb more popular?
Milvus has 46,166 GitHub stars and undb has 2,982. Milvus has the larger community by that measure.
Are Milvus and undb free?
Both are open source. Milvus is licensed under Apache-2.0 and undb under AGPL-3.0. Neither carries a licence fee.
What is the difference between Milvus and undb?
Milvus is written in Go and undb 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, Milvus or undb?
Choose Milvus if you want the larger community (46,166 stars) or its Apache-2.0 licence terms. Choose undb if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.