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Weaviate Alternatives in 2026

The best 8 open-source Weaviate alternatives in 2026, ranked by GitHub stars. Find free, self-hosted replacements for Weaviate.

8 Alternatives
100% Open Source
Free To Self-Host

What are the best Weaviate alternatives in 2026?

The best open-source Weaviate alternatives in 2026 are Milvus, Qdrant, Chroma, pgvector, LanceDB. These tools cover the same use cases as Weaviate — open-source vector database with hybrid semantic search — with the advantage of being open-source, free to self-host, and backed by active communities. Top picks are ranked by GitHub stars and community adoption, so you can find a drop-in replacement that fits your workflow.

#1
Milvus ★ 46k+ Top Pick

Open-source vector database for scalable similarity search

vector-db embeddings open-source cloud-nativeApache-2.0
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#2
Qdrant ★ 34k+ Top Pick

High-performance vector similarity search engine

vector-db embeddings rust open-sourceApache-2.0
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#3
Chroma ★ 29k+ Top Pick

Open-source AI-native vector database

vector-db embeddings rag open-source
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#4
pgvector ★ 23k+

Open-source vector similarity search for PostgreSQL

vector-db postgresql embeddings open-source
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#5
LanceDB ★ 11k+

Serverless vector database for AI applications

vector-db serverless embeddings open-source
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#6
Deep Lake ★ 8k+

Database for AI data with multimodal vector storage

vector-db multimodal storage open-source
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#7
Vespa ★ 7.1k+

Open source AI search and recommendation engine

search vector-db recommendation open-source
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#8
Marqo ★ 5.0k+

Tensor search engine for text and images

search multimodal vector-db open-source
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Last updated: Aug 28, 2026 · Curated by AI Tools Hub Editorial · About · Contact · Privacy