One founder's paid SaaS is built by a chain of agents: Grok Bot manages, Claude Code writes the code, Codex reviews it
Erwin Fennema says he built StatementBridge, a niche financial software product, almost entirely with AI. It started as an internal tool and is now a live SaaS with paying customers. His setup splits the work between agents: Grok Bot manages development and gives instructions, Claude Code writes the code inside Cursor, Codex reviews the code separately, and automated tests run before GitHub deploys it to Render. His post passed 600,000 views.
Why it matters
Using one agent to write and a different one to review copies how real teams catch mistakes. Adding tests before every deploy is what makes a setup like this safe enough to charge customers for.
Who it's for
Solo founders and small teams who want to ship a real product with agents and still keep quality checks in place.
How to try it
- Pick one agent to plan the work and write clear tasks, and a different one to write the code.
- Have a second agent such as Codex review every pull request before you merge it.
- Require automated tests to pass in GitHub before anything deploys, and keep a human approving each release.
Plan & availability: Each tool needs its own plan: Grok Bot, Cursor with Claude Code, Codex, GitHub and Render. He hasn't shared his prompts or costs. Results depend on your product and how good your tests are.
Note: reported by users on X; we haven't independently confirmed it works in the current version.
Source: Erwin Fennema (@erwin_fennema) on X
Written by AgentStackList from the original post. Checked Nov 2, 2026. Features, plans and availability can change, so confirm on the source before you rely on it.
grok-botclaude-codecodexcursorsaas
More Grok Bot tricks
- Grok Bot on Mac can now read your texts, draft your emails and fill your calendar, with your OK app by app · Nov 12
- Grok Bot 1.0 turns your AI into a coworker: it sits in Slack and Teams, joins your calls and offers to pick up work before anyone asks · Nov 11
- Tell Grok Bot "grab me ice cream and chips for movie night" and Gopuff delivers it: checkout now happens inside the chat · Nov 11
- Grok Bot can now get inside your private network (safely): it joins your Tailscale tailnet to reach internal tools · Nov 10