Which AI agent for building a simple internal tool?

Short answer: Replit, Lovable or Cursor. Replit is our first pick: build and host in one place.

Here are the AI tools and agents we’d look at first if you want to build a simple internal tool without hiring a developer, with a simple setup recipe. This recipe is based on vendor documentation and common practice; hands-on testing is in progress.

Our picks

How to set it up

1. Describe the tool: who uses it and what it must do.
2. Start with one screen and one job.
3. Test with real data, then add features.
4. Keep backups and limit who can access it.

Watch out for

Don't put sensitive customer data in an untested app.

Last reviewed Nov 2026. Pricing comes from each vendor's official page; confirm before you buy.