For founders who already have customers
Find the strongest customer-backed message worth testing.
Paste real reviews, survey answers or support messages. Get a customer signal, the receipts behind it and a marketing test for your next homepage or campaign.
No signup · up to 30 feedback items free · paste 20–30 real messages or upload a CSV/TXT.
One finding, with its evidence, and the test to run.
Demo · synthetic exampleThe decision to make
Which benefit should our next homepage lead with?
What customers say
“I finally don’t have to configure everything.”
12 of 30 messages in this synthetic sample mention easy setup · quoted words trace back to their source
Quick Scan · customer signal
Easy setup is a recurring benefit worth testing in this sample.
A signal from customer messages, not proof of what caused a purchase.
Next test
“Get started without another system to configure.”
Test this message against your current headline.
1. Give it evidence
Paste real customer reviews, survey answers or support messages. Upload a CSV or TXT export; inspect the detected messages before you run the scan.
2. It builds the evidence layer first
Every message becomes atomic observations with verbatim quotes that snap to the source or die. Patterns get counts and documented strength rules, never a made-up confidence score.
3. You get a test
Quick Scan gives you a customer signal, supporting evidence and a message to test. Deep adds deeper counter-evidence, a full messaging verdict and verified copy. Deep Positioning also compares your website with your customer feedback.
Start with a signal. Go deeper for a marketing decision.
Free gives you a real finding on real data. Paid buys depth, dataset size and saved research, not tokens.
Try ProofCopy on a real dataset.
- Quick Scan: strongest finding, evidence sample, one implication
- Up to 30 feedback items per scan
- Claim Check on your scan
- No signup
Best for a landing page, campaign, launch or competitor research sprint.
- Deep Analysis: full evidence, counter-evidence, hidden signals
- All four modes incl. website comparison and competitors
- Up to 1,000 feedback items per analysis
- Saved, shareable reports
- 72 hours of access
For founders and marketers who use customer evidence continuously.
- Everything in Sprint, continuously
- Unlimited analyses (fair use)
- Research library across projects
- Cancel anytime
Prices are in USD and exclude applicable taxes. VAT or sales tax is calculated at checkout.
Need a single day? A $9 Day Pass is offered when you hit a limit. Agencies running research for several clients: $149/month with client projects and 2,000 items per analysis.
What message is worth testing next?
Start with what your customers actually say.
Run a free customer scan