{"changes":[{"companyHref":"/c/letter-ai","date":"2026-09-24","documentUrl":"https://www.ycombinator.com/companies/letter-ai","domain":"letter.ai","fact":"provenance:existence","name":"Letter AI","new":{"publisher":"Y Combinator","status":"sourced","url":"https://www.ycombinator.com/companies/letter-ai"},"old":{"publisher":"letter.ai","status":"self-reported","url":"https://letter.ai"},"publisher":"Y Combinator","reason":null,"retrievedAt":"2026-09-17","slug":"letter-ai","status":"sourced","url":"https://whoraisedwhat.com/c/letter-ai"}],"country":"US","description":"Empowering B2B sellers with AI-powered training, coaching, and content","domain":"letter.ai","employees":null,"founded":null,"fundingTotalQuarantined":false,"githubOrg":null,"githubStars":null,"industry":"b2b","investors":["yc"],"lat":41.875562,"lng":-87.624421,"location":"Chicago, IL, USA","name":"Letter AI","rounds":[{"amountQuarantined":false,"amountUsd":1000000,"currency":"USD","date":"2023-06-05","investors":["yc"],"leadInvestor":"yc","source":{"fact":"round","publisher":"yc","retrievedAt":"2026-09-25","status":"attributed","url":null},"status":"attributed","type":"seed","url":null}],"slug":"letter-ai","sources":[{"fact":"round","publisher":"yc","retrievedAt":"2026-09-25","status":"attributed","url":null},{"fact":"existence","publisher":"Y Combinator","retrievedAt":"2026-09-17","status":"sourced","url":"https://www.ycombinator.com/companies/letter-ai"},{"fact":"description","publisher":"letter.ai","retrievedAt":"2026-09-25","status":"self-reported","url":"https://letter.ai"}],"stage":"seed","techStack":["Cloudflare","Typed.js","Amazon Web Services","reCAPTCHA","Google Tag Manager","jsDelivr","cdnjs","jquery 3.5.1","tua-body-scroll-lock 1","tabbable 6","focus-trap 8"],"totalRaisedUsd":1000000,"updatedAt":"2026-09-25"}