Lenz

In plain words

Lenz is an API that fact-checks text for AI applications by extracting claims and verifying them across multiple sources and models. It uses debate between opposing viewpoints, independent reviewer panels, and citation tracking to return scored verdicts with full transparency about sources and reasoning. Available as an API and MCP server, it serves teams building AI products where factual accuracy is critical, offering a free tier with 1,000 daily extractions and paid plans starting at $7.99 monthly.

written from the facts on this page · September 2026

From the sources

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

Drop-in fact-checking API for AI pipelines. 1 month Pro access free — Product Hunt exclusive.

An independent, multi-model fact-checking API for the teams that can’t afford to ship a wrong claim. Multiple models across five stages, grounded in independent sources. Opposing-side debate, three independent reviewers, full citation trail. Lenz is still free to try. Create an account or see the plans for Pro access. Lenz frames it as a precise, falsifiable statement — removing ambiguity before research begins. Multiple queries across authoritative sources. Two models argue opposing sides from the evidence — disagreement is preserved, not averaged away. A score, sourced citations, and a full reasoning trace. Machine-readable so your workflow branches automatically.…from lenz.io

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