DraftProof
AI detectors have up to 50% false positive rates and freelancers are losing clients over wrong accusations. DraftProof documents your writing process to prove authorship, not detect AI.
The Idea
DraftProof is a writing workspace with built-in provenance recording. Write in the editor (or install the browser extension for Google Docs), and every keystroke pattern, edit, pause, and revision is documented without storing your actual words. When you deliver to a client, share a DraftProof verification link showing total active writing time, edit count, revision patterns, and a cryptographically signed timestamp. The shift here is fundamental: instead of asking "does this look like AI?" (unreliable detection), DraftProof answers "can you prove a human wrote this?" (verifiable process). Think of it as version control for writing, where the commit history IS the proof.
Why Now
AI detection tools are failing. The Washington Post reported false positive rates up to 50% under certain conditions. Gizmodo documented freelancers being fired over wrong accusations, including a journalist kicked off WritersAccess after Originality.ai flagged her human-written work. Using Grammarly, the most popular writing assistant, actively triggers false positives. The industry is shifting from detection to provenance: Grammarly launched Authorship, C2PA 2.1 became an ISO standard, and even Originality.ai now recommends checking draft history as the "safest workflow." But nobody has built a standalone, affordable provenance tool designed specifically for the freelancer-to-client workflow.
How to Build
Start with a Tiptap or ProseMirror rich text editor wrapped in Next.js. Record keystroke timing intervals, edit operations, cursor movements, and session duration without storing raw keystrokes. Hash each writing session and store the metadata in Supabase. Generate a shareable verification page for each document showing the writing timeline, edit patterns, and session data. Add cryptographic timestamps (using a service like OpenTimestamps or a simple hash chain). A browser extension for Google Docs is the stretch goal: inject a keystroke listener that sends anonymized timing data back to DraftProof for writers who prefer their existing tools.
Revenue Model
Free tier: 3 documents per month with basic provenance reports. Pro at $12/month: unlimited documents, client-facing verification pages with custom branding, and exportable PDF certificates. Team at $39/month: agency use with multiple writers, centralized dashboard, and white-label verification. The sweet spot is the Pro tier: a freelancer earning $3,000-5,000/month can easily justify $12 for career insurance. Affiliate partnerships with freelance platforms (Upwork, Fiverr, Contra) could drive acquisition. Long-term, sell anonymized writing pattern data (with consent) to AI detection companies trying to improve their models.
Effort
The rich text editor with keystroke timing is a 4-5 day build using Tiptap and a custom plugin for event capture. The verification page generator and hash chain are 2-3 days. User auth, dashboard, and Stripe billing round out the first week. The second week covers the landing page, documentation, and initial outreach to freelancer communities on Reddit and Twitter. The Google Docs extension is a separate sprint. The hardest part is not the technology but getting the verification page format right: it needs to look professional enough that a skeptical client trusts it on first impression.
Reddit Signal
The pain is everywhere. On r/freelanceWriters (245K+ members), professional writers report losing clients due to false AI detection flags, with some clients returning months later to apologize. A Gizmodo investigation documented multiple writers fired despite producing original work. On r/ChatGPT and r/Professors, consensus is that no single AI detector achieves perfect accuracy, with false positive rates from 3% (Turnitin) to 18% (ZeroGPT) and higher under edge conditions. The community is actively moving toward provenance: highly upvoted comments recommend checking Google Docs edit history and draft timestamps as the "only approach that scales without punishing honest creators." AI detection threads appear weekly across these subreddits.
Risk
OKhuman is the closest competitor, using microphone input and keystroke patterns to generate verification stamps. They target academia, not freelancers, and require microphone access (a privacy concern). Grammarly Authorship is bundled with their full product and not available standalone. The bigger risk is market education: clients need to understand why provenance beats detection, and that shift takes time. Also, determined bad actors could simulate typing patterns to game the system, though the effort required makes it impractical for most fraud. If AI detection accuracy improves dramatically, the urgency for provenance tools diminishes.
Verdict
The timing is strong. AI detection is failing publicly, writers are losing income over false accusations, and the entire industry is shifting from "detect AI" to "prove human." DraftProof sits in a clear gap: affordable, freelancer-focused provenance that existing tools do not address. OKhuman targets academia with microphone monitoring. Grammarly bundles authorship into a larger product. Neither serves the freelancer-to-client trust workflow directly. A solo operator can ship this in two weeks and seed adoption through the r/freelanceWriters community where this pain surfaces weekly. The $12/month price point makes it an easy sell against the alternative of losing a client.
AI detection is breaking trust between writers and clients, and the industry is shifting from unreliable detection to verifiable provenance. DraftProof fills a clear gap: no standalone, affordable tool exists for freelancers to prove their work is human-authored. OKhuman targets academia, Grammarly bundles authorship into a larger suite, and neither addresses the freelancer workflow. Strong Reddit signals across r/freelanceWriters (245K+ members) with weekly threads about false positives. Buildable in two weeks with a clear $12/month price point.