The Gap List

Find the gap. Build the thing.

A weekday newsletter for solo developers and indie hackers. One researched market gap, every morning at 7am. Each issue ships with a complete build kit — PRD, tech spec, ten ordered prompts.

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Live · May 5, 2026No. 002
Today · Indie SaaS

The testimonial collector every founder builds twice.

Six tools charge $20–50/mo for a form and a wall. The gap is at the bottom of the market — and it ships in a weekend.

18.1k
searches/mo
$19
cheapest tool
0
under $9/mo
Weekend~3 days· 7 min read · 12 receipts
Read the full issue

This week / Indie SaaS

5 issues · vol. 1, week 1
MonNo. 001
The reverse rate calculator nobody's built.
weekend
Tue · todayNo. 002
The testimonial collector every founder builds twice.
weekend
WedNo. 003

A CLI for tracking which sources you've cited

weekend
ThuNo. 004

Onboarding checklists that don't insult the user

weekend
FriNo. 005

Freelance contract redlining without a lawyer

weekend
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a

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Every gap passes a six-check test before it ships. Pain documented, demand quantified, build scoped, wedge real, path to first dollar, gap unfilled. We publish the receipts.

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Every issue is stamped Weekend, Week, or Month. The estimate is honest. Most are weekends, because most worthwhile gaps are.

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PRD, design spec, tech spec, ten ordered Claude Code prompts, starter dataset. From issue to first commit in the same hour.

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Eight files. PRD, design spec, tech spec, ten ordered Claude Code prompts, real starter data, brand-aligned mockups. Drop the folder into your repo and start at PROMPTS.md §1.

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No. 001The reverse rate calculator nobody's built.Indie SaaS weekendMay 4, 20267m