Free & Open Source

The AI workspace
for your databases.

Query, debug, analyze and automate your databases with an AI teammate — locally, from one lightweight desktop app.

Download DataZen — Free View on GitHub

Free · Open source · macOS / Windows / Linux

Your database data stays local — AI requests go only to the provider you configure.

DataZen
Works with PostgreSQL MySQL SQLite Redis MongoDB ClickHouse + plugin drivers
<15 MBinstaller size
<1 scold startup
4+databases built-in
$0free & open source
The core difference

Your database, with an AI teammate

Not a chatbot bolted onto a grid — every AI capability lives inside the real query workflow.

Ask your database

💬“Show users inactive for 30 days.”
🤖AI reads your schema and writes the SQL
▶️Executes instantly — review, tweak or save
Natural-language SQL →

Fix broken SQL in one click

✕column "usres" does not exist
🩺AI explains the cause in plain language
✓Corrected SQL generated, ready to run
Error diagnosis →

Know why queries are slow

🐢EXPLAIN shows a seq scan over 12M rows
🔍AI pinpoints the bottleneck in the plan
📈Suggests an index — verify before applying
EXPLAIN analysis →
Who it's for

Built for developers who work with databases every day

Primary

Backend & full-stack developers

SQL editor, EXPLAIN analysis, schema browsing, ER diagrams, backups — the daily driver for real database work.

Secondary

AI-assisted developers

NL2SQL, chat sidebar, and an MCP server that plugs your databases into Claude, Cursor and other agents.

Also great

Data-oriented technical users

Explore tables, chart any result set, and automate recurring reports — without leaving your desktop.

MCP Server & Client

Give your AI agents access to your databases

DataZen ships with a built-in MCP server: expose queries, schema inspection, EXPLAIN and even whole workflows as tools for the agents you already use.

  • Works with Claude Desktop, Cursor, Cline and any MCP-compatible client
  • Doubles as an MCP client — connect external MCP servers inside DataZen
  • Headless mode (--mcp-stdio) for servers, scripts and CI
  • Your credentials stay in the OS keychain — agents never see them raw
Learn about MCP →
Claude / Cursor / AI Agentasks in natural language
→
MCPModel Context Protocol
→
DataZentools · schemas · workflows
→
PostgreSQL · MySQL · Redis · MongoDB …your existing databases
Workflows

Turn repetitive database work into one reusable flow

Generate a daily sales report automatically:

🐘 PostgreSQLquery today's orders
→
🐬 MySQLjoin customer data
→
🤖 AIsummarize findings
→
📤 Reportexported & ready to share

Queries, AI steps, conditions and loops — explore Workflows →

Charts

Query → chart → insight

Every result set becomes a chart in one click. Smart recommendations pick line, bar, pie, scatter or area based on your data — export PNG / SVG when it looks right.

  • No chart builder to learn — it just renders your result
  • Type hints from column names and value ranges
  • Pairs perfectly with NL2SQL: ask, run, see the trend
Explore charts →
Charted query results
Compare

What traditional clients don't give you

  DataZen Traditional database clients
Built-in AI — NL2SQL, error diagnosis, EXPLAIN reading ✓ —
MCP server for AI agents ✓ —
Cross-database workflows ✓ —
Local-first — no account, no cloud service ✓ Varies
Charts on any result set ✓ Varies
Installer size < 15 MB Often 100 MB+
Price Free · GPLv3 Often paid

Comparison is indicative of common patterns in established database clients, as of 2026.

Why DataZen

Lightweight, private and open by design

Under 15 MB

Tiny installer, near-instant startup — far lighter than typical heavy clients.

Your data stays local

DataZen operates no cloud database service. Credentials are AES-encrypted in the OS keychain.

Bring your own AI provider

OpenAI, Anthropic, DeepSeek or a custom endpoint — you choose exactly where requests go.

No account required

Download, install, connect. Nothing to sign up for, nothing phoning home.

Extensible drivers

PostgreSQL, MySQL, SQLite, Redis built in. Add OLAP and specialty engines via plugins.

Free & open source

Licensed under GPLv3 — audit the full source on GitHub at any time.

Security

Your database. Your credentials. Your AI provider.

The question every AI database tool must answer honestly: where does my data go?

  • DataZen runs no cloud service — your data never passes through our servers
  • Passwords are AES-256-GCM encrypted; the master key lives in your OS keychain
  • Only schema and query context are shared with AI — and only with the provider you configure
  • Fully auditable: the complete source code is on GitHub under GPLv3
Your databasefull data — stays on your machine
→
DataZenlocal desktop app
sends only schema / query context ↓
Your chosen AI providerOpenAI · Anthropic · DeepSeek · Custom endpoint
Gallery

A look inside

Natural-language SQL generation SQL error diagnosed by AI EXPLAIN plan analyzed by AI Query results charted Cross-database workflow ER diagram with foreign-key relations

Ready to hand the tedious parts to AI?

Download free, connect your database, and run your first AI-assisted query in minutes.

Download DataZen — Free

No account · Open source · Local-first

Latest release · Changelog · Roadmap