Ask Claude to mine online complaints for pain points before you build, and treat its score with care
A solo developer used Claude's extended thinking to collect user complaints from forums and review sites, then built a small cold-email tool. A newsletter retells it; the results are self-reported.
Evidence: The author reports this. We have not checked it beyond reading the source.
The business problem
A solo developer kept building products nobody wanted (one got 3 sign-ups, another never left the laptop) and wanted evidence of demand before writing code.
What was tried
As retold by the newsletter, the developer stopped building first and asked Claude, with its extended thinking mode switched on, to find real pain points people complain about on Reddit, Quora, Twitter, G2 and similar sites. Claude returned a roughly three-page analysis with direct user quotes, a market gap around personalised cold outreach, and its own idea score of 8.5 out of 10. The developer then built a narrow micro-SaaS that writes personalised cold-email openers from a prospect's public activity, and found early customers by using it for cold outreach and posting in startup communities. The newsletter also suggests variations: ask about one niche (for example remote team leads and async tools), summarise complaints about a named competitor across review sites, or look for overlooked problems in one developer niche. The exact prompt sits behind a share link that could not be viewed.
What was reported (positive)
Self-reported by the original poster, via the newsletter: a first paying customer in week two and about $2.3K monthly recurring revenue. No dates, user counts or retention are given.
Limitations
This is a newsletter's retelling of a Reddit post; the original post was not opened here. Revenue is unverified. The 8.5 out of 10 score is Claude's opinion, not measured demand, and nothing shows it predicted the result. The model summarises what vocal complainers say and cannot tell you whether they would pay. The 'ten minutes' covers research only, not building or selling. Extended thinking is credited without a comparison. The newsletter promotes its own prompt library and carries sponsor links, and the variations are its own untested ideas.
What you need
A Claude plan with extended thinking and web research available. The source does not give the exact prompt.
Sources
- PracticalyAI newsletter (retelling a Reddit r/SaaS post) ↗ Community discussion, publication date unknown
Source published: unknown. Last reviewed here: October 16, 2026. Spot a mistake? Tell us.
Tools in this workflow
- Claude: Complaint research with extended thinkingTry Claude
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