Weaviate
Free tierThe open-source AI-native vector database built for production-scale search, RAG, and agents
Free tier available·All audiences·Powered by Snowflake, ModernBERT (via Weaviate Embeddings); external LLMs connectable·API available·Open source
Key strengths
Open-source vector databaseBillion-scale architectureBuilt-in embeddings (no external pipeline required)Hybrid search (vector + keyword)Multi-tenancyDeployment-agnostic (cloud or self-hosted)RAG and agentic AI supportSOC 2 Type II and HIPAA compliance
Free tier + paid plans · from $45 USD/mo
Amsterdam, Netherlands
Founded 2019
Self-hostable
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Documentation & Developer Resources
Weaviate is API-available and open source, giving developers multiple integration paths:
- Client libraries & REST/GraphQL APIs — interact with collections, objects, and search endpoints programmatically
- Weaviate Embeddings — built-in vectorization using Snowflake and ModernBERT models; no external embedding pipeline required
- External LLM connectivity — connect your own LLM providers for generative and RAG use cases
- Query Agent — an agentic query interface available as a usage-billed feature on cloud plans
- Multi-tenancy APIs — isolate tenant data at the schema and storage level
- Hybrid search — combine vector (ANN) and keyword (BM25) search with a single API call
- Self-hosting — full deployment supported on your own infrastructure; source available on GitHub (16,892 stars)
- Cloud integrations — native connectors for AWS, Azure, GCP, Google Cloud, DigitalOcean, Snowflake, and Databricks
Pricing tiers relevant to developers:
| Tier | Cost | Limits |
|---|---|---|
| Free | $0/mo | 1 cluster, 100K objects, 1 GB memory, 10 GB disk |
| Flex | From $45/mo | Pay-as-you-go; usage-based charges for vectors, storage, backups, embeddings, Query Agent |
| Premium | Contact sales | Dedicated/Shared; prepaid contract |
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