Side by side
Infinity vs KDB.AI
Both stand on vector databases. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+2
Choose Infinity if you are developing an LLM or retrieval-augmented generation application and want an open-source database with hybrid search. Look elsewhere if your search design depends on tensor search without added storage, or if you cannot meet its system and version requirements.
Visit Infinity
Free plan APISelf-hostedWeb
KDB.AI offers hybrid search and multimodal retrieval features, with managed cloud and self-managed deployment options. Users evaluating Cloud Starter should account for its stated resource limits and lack of availability commitment.
Visit KDB.AIThe facts
| Infinity | KDB.AI | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Windows | API, Self-hosted, Web |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 2 |
| Maker | Not published | Not published |
| Website | infiniflow.org | kdb.ai |
| On vector databases | #11 of 27 | #7 of 27 |
Infinity: what it does well
- Hybrid search covers dense and sparse embeddings, tensors, and full text.
- Filtering supports metadata and indexed conditional queries.
- Python SDK and HTTP API references are available.
- Docker and Linux package deployment options are documented.
- Apache-2.0 licensed and free to use.
What to know first
- Conditional filters must operate through an index.
- Full-text indexing requires a tokenizer or analyzer.
- Tensor search can add significant storage overhead.
- Client and server versions must match exactly in client-server mode.
KDB.AI: what it does well
- Combines dense and sparse vector search.
- Supports temporal similarity search and metadata filtering.
- Works with text, video, audio, and images.
- Free cloud plan includes 4 GB RAM and 30 GB storage.
- Integrates with LangChain, Vector IO, and LlamaIndex.
What to know first
- Cloud Starter does not promise uptime or availability.
- Cloud Starter is provided without warranty.
- The free cloud plan has a 10 MB query size.
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