if you search ai app development in london you get two kinds of result: agencies with a slick deck and a retainer, and freelancers who'll wire an api to a button and call it a product. neither is wrong, exactly. but it helps to know what you're actually buying.
the first thing to screen for is simple. has whoever you're talking to shipped their own ai app, one you can open right now and use? imelabs runs aegis and botpt as live products. that matters more than a case study, because a case study is a screenshot and a live app is proof the thing holds together under real use.
what "ai app" should mean
a lot of what gets sold as ai app development in london is a thin wrapper: a text box, one api call, a loading spinner. that's a feature, not an app. a real build has its own logic around the model. retrieval over your own content so answers are grounded, not invented. a persona that matches your brand instead of the default assistant voice. rate limits and hard stops so a busy day doesn't become a surprise bill. the model is the easy part. everything around it is the work.
ownership, and the lock-in question
ask who owns the code and the accounts at the end. with a lot of london agencies the honest answer is "us, while you keep paying". you sit on their hosting, their stack, their retainer, and leaving is painful by design.
we do the opposite. you own every line. it deploys into your own accounts. there's no mandatory retainer and nothing to leave because nothing is held hostage. if you want us on an ongoing basis later, that's a choice you make, not a trap you're caught in.
the cost nobody wants to say out loud
a static marketing site can genuinely run at near zero on a free tier in your account. an ai app is different. it has a live backend, a database, a model bill. anyone quoting "free forever" for a live ai backend in london is hiding something. the honest number for a small live app is roughly £20 to £45 a month in infrastructure, plus whatever the model costs at your traffic. you should be told that on day one.
how to brief it
come with the one job the app must do, not a feature list. the smallest version that proves people want it. we scope from there, build it from a proven base so it ships fast, and hand you something you own outright.
that's the difference between hiring ai app development in london and hiring a studio that builds its own.