Custom AI Development

Systems that keep working on the Tuesday after the demo. Built against a baseline, evaluated before they ship, and instrumented so you find out when they drift.

Demos are easy. Tuesday is hard.

Almost any modern model will produce something impressive on a curated example. The difficulty has moved: it is now in the unglamorous parts. What happens on the inputs nobody anticipated, what it costs at real volume, how you notice when quality slips, and who fixes it at 2am.

So we build in the order that surfaces those problems early rather than late. The boring infrastructure comes first, the model choice comes surprisingly late, and nothing ships without something to compare it against.

How a build runs

  1. Establish the baseline

    Before any model, we measure how well the current process performs. Without this number you cannot tell improvement from enthusiasm, and a startling number of projects never establish it.

  2. Build the evaluation first

    A test set drawn from your real data, including the awkward cases, with an agreed metric. It becomes the thing we optimise against instead of optimising against our own impressions.

  3. Ship a thin slice

    One narrow path, working end to end, in front of real users early. A narrow system in production teaches you more in a fortnight than a broad prototype teaches in a quarter.

  4. Harden it

    Rate limits, fallbacks, cost controls, sensible behaviour when the model is wrong or the provider is down. Data handling that a GDPR review will survive, designed in rather than retrofitted.

  5. Instrument and hand over

    Monitoring on quality and cost, not just uptime. Documentation written for the engineer who inherits it, and enough pairing that your team owns the system rather than renting it from us.

if we can't measure it, we won't claim it

Perlon AI · London · 2024

Perlon AI automates B2B outreach. Getting a new client live meant encoding their voice, proof, objections and rules by hand. That care is the point of the product. It was also why onboarding took days.

They wanted a builder that turned a client's voice, proof and rules into something editable in plain language. We turned that into a working first version in 12 days — the first version of what later became their Meta-Prompter.

Their engineers spent the following year extending it and putting it into the platform. Onboarding that used to take days now takes minutes.

Got something specific in mind?

Tell us the problem and what you've already tried. We'll tell you honestly whether it's a build, a strategy question, or neither.