head to head · open source
Milvus vs UStore
Milvus has 46,578 GitHub stars, 4,327 forks, 1,405 open issues and last shipped yesterday. UStore has 646 stars, 35 forks, 26 open issues and last shipped 5 days ago. Milvus leads on adoption by 7,110% (46,578 vs 646 stars). Milvus is written in Go under Apache-2.0; UStore is written in C++ under Apache-2.0. Milvus has attracted 9% as many forks as stars, UStore 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 | UStore | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 646 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | C++ |
| Last push | 2026-11-04 | 2026-10-31 |
| Forks | ⑂ 4.3K | ⑂ 35 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Milvus if
- You weight community size — 47K 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 UStore if
- You want the UStore feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C++
- You evaluated both and UStore fits your workflow better
About Milvus
What is Milvus? 🐦 Milvus is a high performance vector database built for scale. It powers AI applications by efficiently organizing and searching vast amounts of unstructured data, such as text, images, and multi modal information. 🧑💻 Written in Go and C++, Milvus implements hardware acceleration for CPU/GPU to achieve best in class vector search performance. Thanks to its fully distributed and K8s native architecture, Milvus can scale horizontally, handle tens of thousands of search queries on billions of vectors, and keep data fresh with real time streaming updates. Milvus also supports Standalone mode for…
read the full Milvus overview →
About UStore
UStore Modular 1 Multi Modal 2 Transactional 3 Database For Artificial Intelligence 4 and Semantic Search 5 1. supports: RocksDB • LevelDB • UDisk • UCSet backends 2. can store: Blobs • Documents • Graphs • 🔜 Features • 🔜 Texts 3: guarantees Atomicity • Consistency • Isolation • Durability 4: comes with Pandas and NetworkX API and 🔜 PyTorch data loaders 5: brings vector search integrated with USearch and UForm drivers : Python • C • C++ • GoLang • Java packages : PyPI • CMake • Docker Hub Youtube intro • Discord chat • Full documentation Quickstart Installing UStore is a breeze, and the usage is about as…
read the full UStore overview →
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Frequently asked questions
Is Milvus or UStore more popular?
Milvus has 46,578 GitHub stars and UStore has 646. Milvus has the larger community by that measure.
Are Milvus and UStore free?
Both are open source. Milvus is licensed under Apache-2.0 and UStore under Apache-2.0. Neither carries a licence fee.
What is the difference between Milvus and UStore?
Milvus is written in Go and UStore in C++. 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 UStore?
Choose Milvus if you want the larger community (46,578 stars) or its Apache-2.0 licence terms. Choose UStore if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.