Open-source text-to-SQL with RAG
4.4 Bottom line: Vanna is a strong data and analytics tool, best known for RAG-based text-to-SQL trained on your own schema. It has a free plan.
Vanna is an open-source Python framework that generates SQL from natural language using retrieval-augmented generation. You train it on your schema, documentation, and example queries, then ask questions to get accurate SQL back. It connects to databases like Postgres, Snowflake, and BigQuery and works with any LLM, including local models.
| Tool | Rating | Free | From | Best known for |
|---|---|---|---|---|
 Vanna (this tool) | 4.4 | Yes | Free | RAG-based text-to-SQL trained on your own schema |
 Hex | 4.4 | Yes | Free | SQL and Python notebooks |
 ThoughtSpot | 4.4 | No | $25/mo | Natural language search across live data warehouses |
 Databricks Genie | 4.4 | No | — | Natural language questions over lakehouse data |
Vanna is a strong data and analytics tool, best known for RAG-based text-to-SQL trained on your own schema. It offers a free plan.
What makes it different: Vanna stands out for RAG-based text-to-SQL trained on your own schema.
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