Underpriced AI: an AI item scanner and pricing tool for resellers at $5,212 in the last 30 days (Stripe-verified on Indie Hackers), built with Claude Code for the founder's wife
A phone app for thrift and eBay resellers: snap a photo of an item and AI identifies it, estimates what it sells for and drafts the listing.
$5,212 in the last 30 daysper month; $28,031 from January to September 2026; Indie Hackers, Stripe-verified, Oct 30, 2026
Figure read from Indie Hackers on ; source published (Indie Hackers). Last checked by Shipped & Paid on . What these dates mean
- Verification
- Verified Revenue read from a payment provider via a public third-party profile (e.g. TrustMRR) that matches the claim. See verification.
- App type
- SaaS & tools
- Currency
- US dollars (USD)
- Built with
- Claude Code
- Got customers via
- SEO, Blog content, Building in public
- Prior audience
- Not stated in the source
- Source
- Frank Kratzer (founder) on Indie Hackers, Jan 24, 2026
“I have the documentation how this was built using Claude Code, only using prompt engineering. It was originally built for my wife from the ground up”
Editor's note: Frank Kratzer is a developer who built the app because his wife, a reseller, spent hours every night looking up eBay prices. The Indie Hackers product page and underpricedai.com both name him as founder. The quote is his Jan 24, 2026 reply under his own launch post, after commenters called it a copy of another app. The app also uses Claude's vision model to identify items. Indie Hackers has a second listing (underpriced-ai-2) with the same Stripe data.
How they got customers
Organic search is the biggest channel: Frank publishes reseller articles (antique identifier apps, thrift store apps, WorthPoint alternatives) and reported organic sessions going from 2 in January to 1,303 in March 2026. He posts weekly build-in-public updates on Indie Hackers and built an admin CRM to find estate sale companies for partnership outreach.
Steps to try
Build for someone you know: he made it for his wife's reselling business.
From the sourceBuild it with Claude Code through prompts.
From the sourceWrite SEO articles for the exact searches resellers make; organic search became the top channel.
From the sourceWatch AI costs per use: he found scans cost 10x what he thought and changed pricing.
From the sourceTest on the cheap phones your users have and block free-tier abuse early.
From the source
"From the source" steps summarize the linked post.
Source
We summarize and link. Figures are reproduced as stated and are unaudited unless marked Verified. Founder? Request a correction or removal, or get a badge for your site.
Cite this case: Underpriced AI: $5,212 in the last 30 days (verified, Oct 30, 2026). Via Shipped & Paid, https://shippedandpaid.com/cases/underpriced-ai-reseller-pricing-tool-5-2k-month-claude-code/ Free to quote with a link back to this page.
Quick answers
How much does Underpriced AI make?
Underpriced AI reports $5,212 in the last 30 days (per month; $28,031 from January to September 2026; Indie Hackers, Stripe-verified, Oct 30, 2026). Source: Frank Kratzer (founder) on Indie Hackers, Jan 24, 2026. Proof level: Verified. Revenue read from a payment provider via a public third-party profile (e.g. TrustMRR) that matches the claim.
What was Underpriced AI built with?
The source says it was built with Claude Code.
How did Underpriced AI get customers?
Main growth channels: SEO, Blog content and Building in public. Organic search is the biggest channel: Frank publishes reseller articles (antique identifier apps, thrift store apps, WorthPoint alternatives) and reported organic sessions going from 2 in January to 1,303 in March 2026. He posts weekly build-in-public updates on Indie Hackers and built an admin CRM to find estate sale companies for partnership outreach.