| Vector
Database |
Description |
GitHub
stars |
Embeds /
Uses |
Approximate
Nearest Neighbor (ANN) |
In-memory
Support |
Sharding |
Index Types |
Consistency
Model |
License |
Funding |
HQ in |
Company |
| Milvus |
Ccloud-native Commercial
Open Source vector database |
18k |
Not clear:
SQLite, RocksDB or MySQL |
✅ |
❌ |
✅ |
ANNOY; HNSW;
IVF_PQ; IVF_SQ(; IVF_FLAT; FLAT; IVF_SQ8_H; RNSG |
4
consistency levels: strong, bounded staleness, session, and eventually |
Apache-2.0 |
113M USD,
series B |
🇺🇸 |
Zilliz |
| Qdrant |
Commercial
Open Source vector similarity search engine and vector database |
6.6k |
RocksDB |
✅ |
✅ |
✅ |
HNSW |
Eventual Consistency, tunable consistency |
Apache-2.0 |
9.8M € |
🇪🇺 |
Qdrant Solutions GmbH |
| Weaviate |
Commercial
Open Source cloud-native vector database that stores both objects and
vectors. |
5.6k |
❔ |
✅ (It can support multiple ANN algorithms as long as they
support full CRUD) |
❌ |
✅ |
a custom HNSW algorithm that supports CRUD |
Eventual Consistency |
BSD |
67.7M USD, series B |
🇪🇺 |
SeMI Technologies |
| Vespa |
Commercial
Open Source vector database by Yahoo! It is a search engine which supports
vector search, lexical search, and search in structured data |
4.4k |
❔ |
✅ |
maintains disk and memory structures for documents |
✅ |
HNSW; BM25 |
Eventual Consistency |
Apache-2.0 |
Yahoo! |
🇺🇸 |
Yahoo! |
| Chroma |
Commercial
Open Source vector database |
4.4k |
HNSW lib, DuckDB; based on ClickHouse |
✅ |
❌ |
❔ |
HNSW |
❔ |
Apache-2.0 |
20.3M USD, seed |
🇺🇸 |
Chroma Inc. |
| Marqo AI |
A
tensor-based cloud-native commercial Open Source search and analytics engine |
2.8k |
Tensor-based |
❔ |
❔ |
✅ |
HNSW |
❔ |
Apache-2.0 |
undisclosed preseed in May 2022 |
🇦🇺 |
S2Search Australia Pty Ltd |
| Vald |
Cloud-native
Open Source distributed approximate nearest neighbor (ANN) dense vector
search engine |
1.2k |
uses the vector search engine NGT |
✅
(NGT) |
❔ |
✅ |
Distributed
Index, asynchronous indexing |
N/A |
Apache-2.0 |
Yahoo Japan Corporation |
🇯🇵 |
Yusuke Kato and Kiichiro Yukawa (Yahoo Japan Corporation) |
Pinecone
|
Fully
managed vector database that specializes in enabling semantic search
capabilities |
NA |
built on top of Faiss |
✅ (proprietary), plus KNN (with Faiss) |
❌ |
✅ |
proprietary |
Eventual Consistency |
Proprietary |
138M, series B |
🇺🇸 |
Pinecone Systems Inc |
|
|
|
|
|
|
|
|
|
|
|
|
|