How Andy Cloak built a $23K/month solo micro-SaaS on Airtable

Executive overview

Most indie hackers try to build something original. Andy Cloak copied a proven tool from one platform and launched it on a faster-growing one. Data Fetcher is an Airtable extension that connects any external API to a user's Airtable database on a schedule. Built solo, it now generates $23K/month at 85% margin.

The unlock was marketplace distribution: being early on a platform's native marketplace delivers qualified, pre-trusted leads without paid acquisition.

Find a proven add-on on an established platform, then rebuild it natively on a growing one.

The six-step framework for finding platform add-on ideas

1. Find a fast-growing platform using a tool like Exploding Topics.
2. Identify a recurring pain point in their forums, Reddit, or Twitter.
3. Borrow a proven add-on pattern from a more mature platform — copy the UX, make it feel native.
4. Confirm the platform has a public API, marketplace, and extension SDK.
5. Do napkin maths: platform user count × problem frequency × willingness to pay (use the established platform's pricing as a proxy).
6. Assess platform crush risk: check their roadmap and support forums for signals that they'll build the feature natively.

Platform strategy: pros and cons

• Marketplace distribution delivers a steady stream of qualified, pre-vetted leads.
• Sweet spot: big enough to change your financial life, small enough that no one is raising VC money to compete.
• Main risk: platform makes your tool redundant overnight.
• Mitigation: look for the gap between two native features the platform is unlikely to bridge (e.g., scripting vs. no-code imports).

Growth path from zero to $23K MRR

• First customer within days of launching — purely from marketplace visibility.
• Identified recurring API use cases, then created content (blog posts, YouTube videos) targeting those integrations.
• Reached 1K MRR after a few months; 3K after one year.
• Added no-code integrations to lower the technical bar — drove growth to 10K MRR.
• Continued customer feedback loop pushed MRR to 20K after three years, then 23K.

Platform recommendations (2025)

• Notion: still growing fast; API is relatively new; opportunities in automation and data in/out.
• Figma: export integrations (to Webflow, Framer, CMS tools) remain underserved.
• Avoid building for ChatGPT or Claude — oversaturated; use them to superpower your own tool instead.

Tech stack and costs

• Extension: TypeScript, React, Airtable extension SDK.
• Backend: TypeScript, Postgres, GraphQL, Node; hosted on Heroku.
• Workers/scheduled jobs: Hetzner (low-cost).
• Front end: Next.js, Tailwind, ShadCN.
• Support: Help Scout. Analytics: Plausible, ChartMogul. Email: Mailer Lite, Fastmail.
• Monthly costs: ~$2,500 hosting, ~$1,000 SaaS tools, ~$150 coworking. Total margin: 85%.

Key lessons

• Focus beats shiny objects. Distraction often disguises as legitimate concern (platform risk, market saturation) but is usually just boredom with slowed growth.
• Talk to users early and often. One afternoon of UX testing surfaced issues that had suppressed revenue for months.
• Early user testing compressed into a single session can unlock step-change improvements in both usage and revenue.