The real question: which one fits your problem?
Someone asked me last week whether they should use AskYourDatabase or Chion. Depends on what you need. If you need MySQL, SQL Server, or Oracle support today, go with them — we only do PostgreSQL right now. If you need the SQL to be verified before it touches your database, that's us. Here's the rest.
Feature comparison table
Architecture and verification
AskYourDatabase uses a chat-based setup: connect your database, type a question, and the tool sends your schema plus your question to an LLM. The model writes SQL, the tool runs it, you see results. Clean, fast, intuitive. For basic queries against simple schemas, it works well. There's no verification step between generation and execution — if the SQL is wrong, you catch it by eyeballing results or reading database error messages.
Chion routes every question through a multi-phase verification pipeline before anything runs. Schema profiling, entity resolution, strategy selection, contract generation, constrained SQL generation, validation, automatic repair, then execution. When we say "contract-based generation," we mean the LLM writes SQL inside structural bounds that make certain errors — phantom columns, invalid joins, unsafe mutations — impossible by design. It's slower (3-8 seconds vs 1-3 seconds for simple queries), but the verification catches errors that a direct LLM call misses. For production analytics where getting SQL right matters, it pays for itself the first time it catches a bad join before it hits your slide deck.
Security model
AskYourDatabase is a desktop app — credentials stay local, no cloud hop. Your schema info goes to OpenAI for SQL generation, but actual data stays on your machine. For strict data residency requirements, that's a real win.
Chion is cloud-based. Credentials are AES-256-GCM encrypted in a server-side vault. The LLM sees schema metadata but never your actual data rows. We enforce read-only at the database role, the SQL contract, and post-generation validation. If you can't send schema info to any cloud service, AskYourDatabase wins here. If you want defense-in-depth on the SQL side, we have more layers.
Visualization
Ours are D3.js — zoom, pan, dual-axis, animated bar race, stacked area — rendered from verified SQL, with the exact query visible below every chart. If you need data tables with optional charts, AskYourDatabase handles that. If interactive visualization and query transparency matter, the gap is significant.
Database support
AskYourDatabase supports eight databases. We support one. If you need MySQL, BigQuery, Snowflake, MongoDB, or SQL Server today, they're the right pick. We're PostgreSQL-first — deep, not wide. That's a real tradeoff and worth naming.
Pricing
AskYourDatabase uses a one-time license ($199-$399) plus your own OpenAI API costs. No subscription. You pay once and bring your own API key.
Chion is subscription-based: Starter at $29/mo, Pro at $99/mo, Max at $299/mo. LLM costs are included — you don't need your own API keys.
For solo users watching costs, AskYourDatabase's one-time pricing is attractive. For teams that want LLM costs included, managed infrastructure, and ongoing pipeline improvements, the subscription makes more sense.
The split
If your database is PostgreSQL and the output has to be correct enough for a board deck, use Chion. If you need six databases and a chatbot, use AskYourDatabase. That's the real split.