fuast vs Retool

Retool and fuast are aimed at the same pain: teams need internal tools and building them from scratch is too much work. They solve it in opposite ways. Retool gives you a visual canvas. fuast gives you a capsule your AI writes. That one choice ripples through everything else.

The core difference: a GUI you configure vs code your AI writes

In Retool you build by dragging components onto a canvas, binding them to queries, and wiring events in a properties panel. The app lives as Retool's internal configuration. It is fast for the shapes Retool anticipated, and it means the app is only as portable as Retool's export.

On fuast the app is a small full-stack TypeScript file set. There is no canvas. You (or, more often, your AI) write a server/ half and a client/ half against a documented contract, and fuast runs it. Because it is plain code, you can read it, diff it, review it in a pull request, and move it. Because the contract is published at /llms.txt, an AI can write the whole thing from a sentence.

If your mental model is "I will describe the tool to my AI and deploy what it writes," that is the fuast path and it does not have a Retool equivalent.

Pricing: per seat vs per team

Retool prices per user. Every coworker who needs to open a tool is a paid seat, which quietly turns "let me share this with the team" into a budget conversation.

fuast is a small cloud: you deploy an app and share it like a doc. Coworkers sign in with their own account and open it. The pricing is about the platform, not a turnstile in front of every viewer, so sharing a tool with the whole company is not a line item.

Where Retool is the better call

This is an honest comparison, so: Retool is genuinely strong at a few things.

• Database admin UIs. If what you need is a rich CRUD interface over a big existing Postgres, with tables, filters, and inline editing, Retool's component library is built exactly for that and will be faster to assemble.
• A large catalog of prebuilt integrations to enterprise data sources.
• A team that prefers clicking to coding and does not want an AI in the loop.

fuast is not trying to be a database admin panel generator. It is trying to make the small, bespoke app trivial to write and share.

Where fuast wins

• Your AI writes it. The contract is small and documented for a model, so "build us an expense approval flow" becomes a working app, not a canvas you assemble by hand. Retool has AI features, but the artifact is still Retool config; on fuast the artifact is code.
• It is code you own. Reviewable, diffable, portable. No lock-in to a visual format.
• Sharing is the product. A link, sign-in, verified identity. No per-seat gate.
• Batteries are included the same way. Auth, database, file storage, cron, and email are built in, so the app your AI writes has everything it needs without leaving the platform.
• Real isolation. Each app runs in a V8 isolate on its own subdomain origin, so a shared workspace of tools stays walled off from each other.

The short version

Choose Retool when the job is a heavy admin UI over an existing database and your team wants to build by clicking. Choose fuast when you want the tool to be a small, owned, reviewable app that your AI can write from a sentence and your whole team can open from a link. See it on your own team: start free, or read what a small cloud is.