Answers from your company's documents, with the source attached.

Ask about a policy or a process. Read the answer, then check the exact page it came from. When the documents don't cover a question, Brain says so instead of guessing.

Book a free audit View the code on GitHub

Portfolio product · Demonstrated on sample company documents · Company setups are scoped separately

Useful Brain source library showing document names and processing status. — The real product: every document it reads, with its status. A new version is checked before it replaces the active one.

Check every answer against its source.

Each answer carries the documents it used. Open one and read the passage before you act on it. Important answers still deserve a human check.

A Useful Brain answer on sample documents: sixteen weeks of paid parental leave, with the evidence panel showing the cited passage from parental-leave-policy.md and its retrieval scores.

Tested on real questions, including the hard ones.

We test it with 120 questions over a set of sample documents, including ones it should decline. The latest run passed 118 of 120. A benchmark on sample data, not a customer result.

Useful Brain evaluations dashboard showing the latest run: 118 of 120 checks on the Northwind test set, by category.

What it is, and what it isn't.

What it doesAnswers questions from a document collection and cites its sources
When it can't answerIt says the documents don't cover the question
Tested on120 questions over synthetic documents. Latest recorded run: 118 passed
Runs onCloudflare Workers, D1, Vectorize and Workers AI
StatusA portfolio product on sample data, not a public service
For your companyUseful Build scopes a setup around your documents and tools

Answers from your company's documents, with the source attached.

Check every answer against its source.

Tested on real questions, including the hard ones.

What it is, and what it isn't.

Want this for your company's documents?