Replace / Zilliz Cloud
Best free Zilliz Cloud alternatives (open source, self-hosted) 2026
The best open-source alternative to Zilliz Cloud is Qdrant (or pgvector) with Weaviate, self-hosted on Railway. Vectors you host. Qdrant is Apache-2.0; pgvector lives in Postgres — Pinecone without the serverless meter.
Estimated save $2,400 a year.
Open the stackStart on Railway
How Zilliz Cloud compares
| Zilliz Cloud | Qdrant / pgvector | |
|---|---|---|
| Pricing model | Hosted subscription | Open-source or fair-code license; you pay the host |
| Hosting | Vendor cloud | Self-hosted on Railway or any VPS |
| Rough monthly cost | Public list price not verified this run | Hosting only — no SaaS seat meter in this repo |
- Qdrant
Apache-2.0 vector database
- pgvector
Vectors inside PostgreSQL
- Weaviate
BSD-3-Clause vector database
- XERJ
Local AI search: one binary, mixed folders, Elasticsearch API, agent memory
FAQ
- What is the best free open-source Zilliz Cloud alternative?
- The best open-source alternative to Zilliz Cloud is Qdrant (or pgvector) with Weaviate, self-hosted on Railway. Vectors you host. Qdrant is Apache-2.0; pgvector lives in Postgres — Pinecone without the serverless meter.
- Is it free?
- The Qdrant / pgvector licenses are open source or fair-code. You still pay hosting (Railway or any VPS) and any APIs the stack calls. There is no Zilliz Cloud seat or task bill on this path.
- Can I migrate from Zilliz Cloud?
- Yes. Start with the workflows or data you actually use, then cut over. The Qdrant / pgvector stack page has the agent prompt and the cost table; most teams rebuild the slice that matters and leave old Zilliz Cloud links until they expire.
- How do I deploy it?
- Open the Qdrant / pgvector stack, copy the agent prompt, and deploy on Railway (one service, PORT, and a volume when the app needs disk). Placeholder: Qdrant + a volume, or Postgres with pgvector. RAG chat can sit on /stacks/open-webui-litellm.
- What does this replace?
- Pinecone. The published small-team estimate on this stack is $2,400 a year.
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