Software, made from your words.

You write the spec and its scenarios: what you want, and how you’ll know it works. AI agents write the code and test it until every scenario passes, with little to no human review.

Get early access How it works

It starts as a spec.

Say what you want in plain language: who it’s for, what it should do, the constraints it has to respect and the cases you already know about. That spec becomes the system’s single source of truth, holding requirements, scope and intent in one place. Everything that follows, from structure to code, is derived from it.

Then say how you’ll know it works.

Scenarios turn intent into acceptance criteria. Each one sets out a situation, an action and the expected outcome, step by step, in language the whole team can read. Together they form the contract the software has to satisfy before any of it counts as done.

Given: an order is open
When: the customer cancels it
Then: they get a confirmation

Agents write the code.

Agents take the spec and the scenarios as their brief and build against them: data model, back end, front end, integrations and everything in between. The spec sets the boundaries, the scenarios define what done means, and the agents carry out the implementation.

The harness keeps them honest.

Every build runs through test harnesses that execute your scenarios against the code. What fails goes back to the agents for another pass; what passes moves on. Correctness is measured against your own criteria, not taken on trust.

Then it converges.

Write, test, fix, again: the loop repeats until every scenario passes and each requirement in your spec is met. That is convergence, a working system validated against your acceptance criteria and reached with little to no human review.

For The Builders. Build the whole product.

For entrepreneurs and builders taking a product from idea to market: front end, back end, marketing site, design and more. Each layer is specified, built and checked on top of the last, so the whole product grows from one coherent spec rather than a patchwork of tools.

For Product Managers. Run the company’s code on your machine.

Run the company’s own source on your machine, describe the change as a spec, and let the agents implement it and test it against your scenarios. You bring engineering a working, tested proposal instead of another ticket in the backlog. Stop waiting for your engineers to be proactive.

For Small Businesses. Make the tool your office is missing.

Build the admin and productivity tools the rest of your team needs, without commissioning a bespoke software project. Say, a front-desk app for a medical office that makes routine tasks faster and more organised, specified by the people who run the desk and tested against their own scenarios.

For Knowledge Workers. Put your whole desktop to work.

Connect Jira, Slack, 3rd party APIs and the browser into workflows that make you more productive and more efficient. The automations run on the desktop that already holds all your files, securely, no cloud required, so your data stays where it is and you keep full control.

Be among the first to build with AISF.

We’re opening AISF to early users first. Leave your email, tell us what you’d build if you like, and we’ll be in touch when there’s a place for you.