Natural Language SQL

Web · Mac · Linux · Self-hosted · API

Freedom report

Three barsScore 5.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Natural Language SQL is ranked #8 of 19 in AI SQL generators on Freedom251. It runs on API, Linux, macOS, Self-hosted, Web. There is a free plan.

Natural Language SQL plans and pricing

All plans

Natural Language SQL Engine Free GPL-3.0 open-source project · local installation github.com · 5 Oct 2026

Compared on AI SQL generators

Query explanations: Yes
Deployment: self_hosted
Schema context: Yes

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The record

Purpose: The engine turns plain-English database questions into SQL, validates and runs the SQL, then streams back results.
AI providers: Ollama runs locally by default, with OpenAI, Gemini, and Groq available as opt-in cloud providers.
Database support: It connects to PostgreSQL and MySQL and can query multiple same-type databases in parallel.
Schema retrieval: Hybrid retrieval combines BM25 and sentence-transformer vectors to select relevant schema context for a question.
Query workflow: Users can review and edit generated SQL before execution, and the interface streams progress through the query stages.
Results: Results support sorting, pagination at 50 rows per page, CSV and JSON downloads, and tab-separated copying.
Query limits: SELECT queries receive a default LIMIT, explicit result counts are capped at 1,000 rows by default, and query execution times out after 30 seconds by default.
Write queries: INSERT, UPDATE, and DELETE are allowed by default, with warning banners; the README recommends a read-only database user to block writes.
Local privacy: With the default Ollama provider, questions, schema, and generated SQL stay on the user's machine, and the app says it has no telemetry.
Cloud privacy: With an opt-in cloud provider, the question, relevant schema portion, and generated SQL context are sent to that provider; database passwords and query result rows are excluded.
Credential security: Database passwords and cloud API keys are Fernet-encrypted at rest, redacted from logs, and masked in API responses.
Deployment requirements: The recommended Docker setup requires Docker 20.10+ with Compose v2 and about 10 GB of free disk space; the first run downloads an approximately 5 GB model.
License: The repository lists the project under the GPL-3.0 license.
Local AI: Ollama runs locally by default, and the project says questions, database schema, and generated SQL stay on the user's machine with this provider.
Price from: Free

Where it ranks on Freedom251

Best AI SQL Generators in 2026#8 of 19

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Sources

github.com/jmanoj0905/natural-language-sql· checked 4 Oct 2026
github.com/jmanoj0905/natural-language-sql/blob/ma· checked 4 Oct 2026