Matteson Systems
Matteson Systems LLC is the entity behind both this product and thaw. The product here is an autonomous outreach pipeline I built solo to audit local-business websites at scale.
what it is
The pipeline starts from OpenStreetMap and pulls every business in a region. For each one, it opens the real website in a headless browser, screenshots it on desktop and a real mobile profile, and runs Lighthouse Core Web Vitals. A Claude-vision pass reads the page and names the single most damaging fixable problem. That finding becomes the subject line and lead of a personalized email; a scorecard page built per business gives the owner a plain-English breakdown with a letter grade and an easy fix for each problem.
10,500+ businesses scored in a single run. 158 high-priority leads surfaced. About three cents per business end to end.
how it runs
State lives in an append-only, event-sourced Postgres CRM with Drizzle migrations. Every send, open, and reply is a recorded event. A threaded Gmail drip runs on a Vercel cron with reputation-aware send caps and in-thread RFC822 replies. Opens and replies are tracked. A per-call cost ledger in integer microcents tracks the real unit economics.
what broke
The day I finished the scorecard, the system was about to cold-email a funeral home in Toronto that had been scraped in by accident: out of region, wrong category. I built a filter for those cases. Most of running this is judgment around the model calls, not the model calls themselves.
numbers
10,500+businesses scored in a single run158high-priority leads surfaced- about
three centsper business, end to end