We built Casebriar because the law in a complaint deserves checking, not guessing.

The problem we set out to solve

A tenant writes in. The boiler's broken, there's damp, and they've read that you're legally required to cut the rent. Someone at the agency now has to answer three different questions, in writing, knowing the reply might be read by a redress scheme later.

The options weren't good. Look the law up yourself, and hope the page you found is current and applies in England. Send it to a solicitor, and wait. Or paste it into a chatbot, which will write a confident reply that may quote a section that doesn't say what it claims.

We thought there should be a way to answer a complaint properly that doesn't take all afternoon: every issue picked out, every legal claim checked against the legislation itself, and the decision left with the person who knows the property.

What it must never do

Casebriar is built around five rules:

• Never state the law from memory. If Casebriar says a provision applies, it has fetched that provision from legislation.gov.uk and checked the words.
• Never tell a tenant they're wrong. If a claim can't be supported, it's marked "not established", and the reply doesn't repeat it as fact either way.
• Never decide for you. Nothing is drafted until you've chosen an outcome for every issue.
• Never keep complaints longer than it needs to. Content is erased on a schedule your agency sets.
• Never pretend to cover more than it does. England only, because housing law differs in Wales, Scotland and Northern Ireland.

Where we are now

Casebriar is available now to letting agents and property managers in England. While it's new, we're also running a free pilot with a small number of agencies: we're building it with the people who use it, and what they tell us, about what's confusing, missing or slow, decides what we build next.