An AI coding guide tool went from zero to $42,000 MRR in about 90 days
CJ Zafir built CodeGuide in 14 days after validating the idea with a waitlist, and reports running costs of about $3,500 a month.
Subject: CodeGuide (CJ Zafir)Subscription tool that writes planning docs for AI coding tools
Case Overview & Background
CJ Zafir set out to build 12 startups in 12 months. CodeGuide launched on December 24 and, he says, reached $42K MRR in three months with a community of more than 4,800 AI developers.
How AI Is Used
Step-by-Step Process
Gathered waitlist signups from daily content before building.
Used AI-friendly stacks and coding tools.
Daily content on X fed a waitlist landing page.
Customer Acquisition & Distribution
Limitations, Risks & Failure Modes
What may not apply to you, and what could go wrong:
- Self-reported
- API costs are the biggest expense at about $2,800 a month
- Depends on the AI coding tools staying popular
Key Takeaways
- Validate demand before writing code
- Daily content can replace an ad budget
- Track API costs closely
Sources
Starter Story: From Zero to $42K/Month in 90 Days with AI
Note: Video interview transcript with full monthly cost breakdown (~$3,500).
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