{"changes":[],"country":"FR","description":"C12 builds carbon-based quantum computers using carbon nanotubes as the fundamental qubit building block. It targets researchers and enterprises in materials, chemistry, finance, and industry needing fault-tolerant quantum acceleration. C12 holds an exclusive CNRS patent on its carbon-nanotube qubits and is the only startup advancing this approach toward fault-tolerant systems on its 2033 roadmap.","domain":"c12qe.com","employees":null,"founded":2020,"fundingTotalQuarantined":false,"githubOrg":null,"githubStars":null,"industry":"infra","investors":[],"lat":48.853495,"lng":2.348391,"location":"Paris, France","name":"C12","rounds":[{"amountQuarantined":false,"amountUsd":19400000,"currency":"USD","date":"2024-06-19","investors":[],"leadInvestor":null,"source":{"fact":"round","publisher":"techcrunch","retrievedAt":"2026-05-02","status":"attributed","url":null},"status":"attributed","type":"series-a","url":null}],"slug":"c12qe-com","sources":[{"fact":"round","publisher":"techcrunch","retrievedAt":"2026-05-02","status":"attributed","url":null},{"fact":"existence","publisher":"c12qe.com","retrievedAt":"2026-05-02","status":"self-reported","url":"https://c12qe.com"},{"fact":"description","publisher":"c12qe.com","retrievedAt":"2026-05-02","status":"self-reported","url":"https://c12qe.com"}],"stage":"series-a","techStack":["Cloudflare","Google Font API","Google Hosted Libraries","Google Tag Manager","jsDelivr","jquery 3.5.1"],"totalRaisedUsd":28000000,"updatedAt":"2026-05-02"}