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Verfiy at the speed you work.

As you write or read, Cothon (KOH-thon) instantly surfaces what your sources say: confirming, contradicting, or clarifying.

Built for those who can't afford to get it wrong.

AI is everywhere in the workplace. Verification is not.

2/3 of professionals use AI output without evaluating its accuracy. Global workforce study · 48,000 respondents

 

1/2 have already made mistakes at work because of unverified AI-generated content. Same study · self-reported errors

The beat of hesitation you feel before hitting send is a rational response to a real problem. 

Your sources. Your standards. Your call.

Works wherever you work: Google Docs, PowerPoint, browser, your favorite AI. Cothon fits alongside your workflow, so checking your work doesn't mean stopping it.

Cothon is the double-check.


You bring the sources you already trust: reports, datasets, PDFs, prior research, the outlets you actually read. Highlight any statement and Cothon checks it against them instantly, confirming, contradicting, or clarifying what your sources actually say.

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Your research, captured in context.

When you come across a source worth keeping, one click saves it straight to your evidence base, tagged, indexed, and ready to use, without ever leaving what you're reading.

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Your expertise, protected.

Your team's research, in one place, and checking in real time. As anyone writes, Cothon flags claims against your shared source library. Everyone's knowledge aligned. No inaccuracy slips through.

IN THE NEWS

How two friends launched an AI safety tool

By Natalie Donback // 15 May 2026

Following layoffs, these development professionals set out to improve the use of AI in the sector and discovered a wider appetite for what they had built.

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Meet the founders

The team behind Cothon has led climate finance, sensitive data systems, and crisis response programs across four continents.

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Co-Founder, CPO

Will Culhane

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Co-Founder, CEO

Max McGrath-Horn

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Founding Engineer

Yann Say-Liang-Fat

Be among the first to try it


Cothon is in early access. We're working with a group of professionals who make their living on written work — consultants, analysts, researchers, lawyers, policy writers — to shape the product before we open it up.

If that's you, we'd like to hear from you.

Get involved

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