Free Open-Source SQL GUI with AI Query Generation (2026)
Which free, open-source SQL clients can write SQL from plain English, what each one needs from you (an API key, a local model, a server), and where a hosted tool fits instead.
Quick answer
Yes, a few exist. DBeaver Community is a free, open-source (Apache 2.0) desktop SQL client with a built-in AI Chat that writes SQL from plain English; you connect it to OpenAI (your own API key or ChatGPT account) or to GitHub Copilot. SQL Chat is open source (MIT), chat-first and self-hosted, and can use a local model through Ollama. DataLine (GPL-3.0) generates and runs SQL from questions in a local app.
In every case the software is free and the AI model is the part you bring: an API key billed by the provider, or a local model on your own hardware. If you would rather not run anything, hosted tools such as AI2SQL work in the browser but are not open source. Looking for an AI SQL editor inside VS Code? See free AI SQL in VS Code.
At a Glance
| Tool | License | AI query generation | Local model | Setup |
|---|---|---|---|---|
| DBeaver Community | Open source (Apache 2.0) | Built-in AI Chat (OpenAI key, ChatGPT account or GitHub Copilot) | Paid editions (Ollama) | Desktop install |
| SQL Chat | Open source (MIT) | Chat-first (OpenAI-compatible key or endpoint) | Yes, via Ollama endpoint | Self-host (e.g. Docker) |
| DataLine | Open source (GPL-3.0) | Generates and runs SQL from questions | See project docs | Local app or Docker |
| Beekeeper Studio Community | Open source (GPLv3) | AI Shell is in paid editions | n/a in Community | Desktop install |
| Vanna | Open source (MIT), repository archived | Python framework, not a GUI | Yes, via Ollama | Python project |
| Dataherald | Open source (Apache 2.0) | NL-to-SQL engine with an API | See project docs | Backend service |
| AI2SQL | Not open source (hosted) | Built in, no API key | No | Browser |
Licenses and features checked on 6 October 2026 against each project's repository or pricing page.
1. DBeaver Community
DBeaver Community is one of the most widely used open-source SQL clients: Apache 2.0 licensed, cross-platform, and able to connect to PostgreSQL, MySQL, SQL Server, Oracle, SQLite and many more. Since version 26.1.2 the Community Edition includes AI Chat (it replaced the earlier AI smart completion), which uses your connected schema to write SQL from a plain-English request. In Community you connect it to OpenAI with an API key or a ChatGPT account, or to GitHub Copilot with a Copilot subscription or trial, so model usage is billed by that provider. The paid editions add more providers, including Google Gemini, Azure OpenAI and local models through Ollama.
Good fit if you want a full desktop SQL client with AI built in and you are comfortable using your own OpenAI or GitHub Copilot account.
2. SQL Chat
SQL Chat is an open-source (MIT) chat-based SQL client originally built by Bytebase. You connect MySQL, PostgreSQL, SQL Server, TiDB Cloud or OceanBase and ask questions in a chat thread. You run it yourself, for example with the project's Docker image, and give it an OPENAI_API_KEY. Its OPENAI_API_ENDPOINT setting can point at a self-hosted model such as Ollama, which makes it one of the few chat SQL clients that can run on a local LLM. Bytebase lists SQL Chat as sunset since July 2026; the code stays public on GitHub, so self-hosting is the way to use it.
Good fit if you want an open-source chat interface for SQL and prefer to keep the model on your own machine.
3. DataLine
DataLine is an open-source (GPL-3.0) data analysis app that generates and executes SQL from natural language and charts the results. It connects to PostgreSQL, MySQL, Snowflake, SQL Server, SQLite and files such as CSV and Excel, runs as a downloadable binary or a Docker container, and stores everything on your device. By default it hides your data from the LLM it uses (an option you can turn off).
Good fit if you want question-to-chart analysis in a local, open-source app.
4. Beekeeper Studio Community
Beekeeper Studio is a cross-platform SQL editor and database manager. The Community Edition is open source (GPLv3) and free to download. Its AI feature, AI Shell, is part of the paid editions, so the Community Edition does not generate SQL from plain English. It is still a capable free editor for browsing tables and writing queries yourself.
Good fit if you mainly need a clean, free SQL editor and can add AI separately or move to a paid edition later.
5. Vanna
Vanna is an open-source (MIT) Python framework for turning questions into SQL and answers. It is model-agnostic, including local models through Ollama, and is meant to be built into your own application rather than used as a ready-made GUI. Its GitHub repository is now archived (read-only), so check the project's status before you build on it.
Good fit if you are a Python team prototyping natural-language-to-SQL inside your own product.
6. Dataherald
Dataherald is an open-source (Apache 2.0) natural-language-to-SQL engine that you run as a backend service and call through its API. It is aimed at teams building question answering over their own warehouse rather than at people who want a desktop client. The last code change in its public GitHub repository was in July 2024.
Good fit if you need an NL-to-SQL service to integrate, and have engineers to operate it.
7. AI2SQL (hosted, not open source)
To be clear about where we stand: AI2SQL, which publishes this blog, is not open source. It is a hosted web app that writes SQL from plain English for PostgreSQL, MySQL, SQL Server, Oracle, SQLite, Snowflake, BigQuery and other dialects, with no install and no API key to manage.
- Free plan: 3 queries a day on a demo database.
- Paid plans: Start $9, Pro $19 and Team $39 per month. Every paid plan starts with a 7-day trial, and a credit card is required to start the trial.
- Your own database: connecting it, so AI2SQL reads your real schema and runs read-only queries, is part of Pro and Team.
Good fit if you would rather not install, host or configure anything and an open-source license is not a requirement.
Which Should You Pick?
- A free desktop SQL client with AI built in: DBeaver Community, with your own OpenAI or GitHub Copilot account.
- Open source with a local LLM: SQL Chat pointed at Ollama, self-hosted next to your database.
- Questions to charts on your own machine: DataLine.
- A free editor now, AI later: Beekeeper Studio Community.
- Building NL-to-SQL into your own product: Vanna or Dataherald, after checking each project's maintenance status.
- Nothing to install or host: a hosted tool such as AI2SQL (not open source; paid plans need a card to start the trial).
- AI SQL inside VS Code: see free AI SQL in VS Code.
Whichever you choose, review generated SQL before it runs against data you care about, and connect AI tools with a read-only database user. For a wider comparison that includes paid tools, see the best AI SQL tools in 2026.
Frequently Asked Questions
Is there a free open-source SQL GUI with AI query generation?
Yes. DBeaver Community Edition is free and open source (Apache 2.0) and includes an AI Chat that writes SQL from plain English; you connect it to OpenAI with your own API key or a ChatGPT account, or to GitHub Copilot with a Copilot subscription, so model usage is billed by that provider. SQL Chat is open source (MIT), self-hostable and chat-first, and needs an OpenAI-compatible API key or endpoint. DataLine (GPL-3.0) generates and runs SQL from natural language in a local app. The software is free in each case; the AI model is the part you supply.
Is there an open-source SQL client with free local LLM support?
SQL Chat can point its OpenAI API endpoint setting at a local Ollama server, so the model runs on your own machine. Vanna, an open-source Python framework, also works with local models through Ollama, but its GitHub repository is archived. DBeaver supports local models through Ollama in its paid editions; the free Community Edition connects to OpenAI or GitHub Copilot, both cloud-hosted.
Does Beekeeper Studio have AI?
Beekeeper Studio's AI Shell is part of its paid editions. The free Community Edition (GPLv3) is a full SQL editor and database browser without the AI Shell.
Is AI2SQL free or open source?
AI2SQL is not open source. It is a web app with a Free plan of 3 queries a day on a demo database. Paid plans are Start ($9/month), Pro ($19/month) and Team ($39/month); each starts with a 7-day trial, and a credit card is required to start the trial. Connecting your own database is part of Pro and Team.