The AI SQL agent that shows its work · analyst-founded
The Chion AI founder spent ten years reading other people's SQL. Now every chart ships with its own.
The tools Jonathan Dag used either trusted the model or made him write the SQL by hand. Chion is the third option: a read-only SQL agent that answers a plain-English question and shows the SELECT it ran beside the chart. He spent ten years as an analyst at Meta, Twilio, American Express, MasterCard, and Bosch before building it, and Dagnostics LLC operates it.
Meet Jonathan Dag, founder of Chion
10+
Years in analytics
Jonathan Dag has spent over 10 years as a technical analyst working for Meta, Twilio, American Express, MasterCard, and Bosch. Different industries, same broken loop: answers no one could verify. Business users waited days for a dashboard update. Analysts rewrote the same SQL with different filters. AI tools made up queries that looked right. For a decade that loop was merely slow. Now that teams are handing analytics to AI agents, an answer you can't verify or take with you is a real liability. Chion exists to close that gap.
Ask in plain English, then read the SELECT that produced the chart before you trust the number.
What is Chion?
So he built it. Chion is an AI SQL workforce: code-validated SQL agents that export as SKILL.md files for Claude Code and Codex. The analytics knowledge stays yours instead of being locked to us or to a single model. Each agent runs read-only against PostgreSQL, with credentials in an AES-256-GCM vault, an audit row for each executed query, and the SQL shown beside every chart.
Every chart traces back to its SQL.
Why we exist, and what we won't compromise.
If you can't see the SQL, you can't trust the chart. If you can't trace the number, you shouldn't put it in a slide deck. We built Chion on three principles we won't trade for speed:
Show the work
Every chart ships with the exact SQL that produced it, without exception.
Built for analysts, usable by everyone
The pipeline validates like an analyst would. The interface doesn't require you to be one.
Trust by default
SELECT-only. Read-only. The model receives your table and column names, the rows your query returned, and sampled column values. You choose where every component runs: our cloud or your own.
Show the work. That's the whole idea.
How each answer carries its query.
Show the work at every step, for every request.
13+
Workflow steps per request
Every question runs the full validation framework: schema profiling, two-layer validation, and repair.
7+
Analytic strategies
Each request routes across seven analytical strategies, from entity lookup to extrema detection.
<30k
Tokens per request
The whole pipeline stays under 30k tokens per request. Predictable on cost, whatever the question.
None of this is a settings toggle. It's how the pipeline is built: read-only on your Postgres, compiled for Claude Code and Codex.
Chion enforces SELECT-only SQL and scopes access to the read-only role you supply. Credentials sit in an AES-256-GCM vault, each result stops at 1,000 rows, and every executed query leaves an audit row, written fire-and-forget so a logging failure never blocks your answer. The model receives your table and column names, the rows your query returned for the narrative, and sampled column values.
Talk to the founder
Jonathan reads every email. Send questions, feedback, or a demo request.
Jonathan Dag · Founder & CEO, Chion
A former technical analyst at Meta, Twilio, American Express, MasterCard, and Bosch. Engineer by training, analyst by trade.
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Chion: AI semantic layer for PostgreSQL
Chion Studio reviews and ratings on G2
Chion company profile on Crunchbase
Chion is a solo-founder operation today. If you're an engineer or analyst who wants to help build analytics that teams can defend, I'd like to hear from you. Email contact@chion.ai.
Frequently asked questions
Who founded Chion?
Chion was founded in 2025 by Jonathan Dag, a technical analyst with over ten years of experience at Meta, Twilio, American Express, MasterCard, and Bosch.
What does Chion do?
Chion converts plain-English questions into a code-validated read-only SELECT and an interactive D3 chart. It connects read-only to PostgreSQL today.
Is Chion safe to connect to my database?
Yes. Chion uses read-only SELECT queries, vault-encrypted credentials (AES-256-GCM), row-limit enforcement (max 1,000 rows / 12,000 cells), and an audit row for each executed query, written fire-and-forget so a logging failure never blocks your answer. Treat it as a signal, not a complete ledger.
How is Chion different from other analytics tools?
Chion shows the SQL alongside every chart so you can verify the answer. The 13+ step pipeline profiles your schema and validates queries in two layers. The model receives your table and column names, the rows your query returned, and sampled column values.
Where is Chion based?
Chion is a remote-first company founded in 2025.
See the work behind every number.
7-day trial. Connect a read-only PostgreSQL database and ask your first question.
Last reviewed: June 9, 2026