A few hours into our launch, Lenz is now sitting at #3 Product of the Day on Product Hunt.
For a small, bootstrapped team, this is a pretty special milestone. We re incredibly grateful to everyone who has checked out the launch, tried the product, asked thoughtful questions, and shared feedback along the way.
Lenz is an AI fact-checking API for products that cannot afford to hallucinate. It extracts verifiable claims from any text, then checks each one: searching independent sources, running multi-model debate, and routing through a review panel — returning a scored verdict with every source, argument, and step visible. Most AI tools give you one model's best guess from memory. Lenz ensures no single model's blind spots drive the conclusion. Available as API and MCP. Try it free at lenz.io/ph
We ve been looking at a question that feels increasingly relevant as more products put LLM output directly in front of users: if two frontier models are asked to judge the same factual claim, how often do they actually reach the same conclusion?
We tested five frontier models on 1,000 real-world claims under the same forced-choice setup.
On 63% of the complete claims, at least one model disagreed with the others or no majority formed.
On 23%, the disagreement was substantive verdicts at least two categories apart.
Lenz is an AI fact-checker.
Paste any claim and Lenz searches for independent sources, has multiple AI models argue both sides and a separate AI panel review the evidence before reaching a scored verdict — with every source and argument and step of the process visible to you.
Most AI tools give you one model's best guess from memory. Lenz orchestrates a multi-model research system based on real sources so no single model's blind spots drive the conclusion.
Try it free at lenz.io/ph
