Our mission

We make breached passwords a dead end

LeakJar helps organizations protect their users from the fallout of breached credentials. We build privacy-preserving tools to screen, detect, and respond to credential exposure—backed by more than a decade of offensive-security work.

Years of excellence

$0M

Funding raised

Enterprise clients

Core products

Our values

What we stand for

The principles behind everything we build.

Privacy-first

We use k-anonymity and modern hashing so neither we nor anyone else ever sees your users' passwords. Privacy isn't an add-on — it's the architecture.

Developer experience

Clean REST APIs, thorough docs, and signed webhooks that let you ship breach detection in minutes, not weeks. We build for builders.

Responsible disclosure

We handle breached-credential data with care. Our acceptable use policy keeps these tools pointed squarely at defensive security.

Transparency

From data sourcing to security practices, you deserve to know how we operate. Our documentation is our commitment to openness.

Our story

Built by hackers, for defenders

LeakJar is built by SEWORKS, an offensive-security company founded in 2013 by a team of white-hat hackers in San Francisco. Our DNA is rooted in seeing systems the way attackers do—web and API penetration testing, cyber threat intelligence, and account-takeover detection.

In 2018 we launched Pentoma®, the first AI-powered penetration testing service. That same attacker's perspective now powers LeakJar: we know exactly how stolen credentials get weaponized, so we built the tools to stop them before they reach your users.

Founded 2013

White-hat hacker origins

San Francisco, CA

Heart of tech innovation

AI pioneer

Pentoma®, launched 2018

NVIDIA Inception

Program member

Leadership

Our team

Decades of cybersecurity expertise paired with an attacker's instinct.

Min Pyo Hong

Founder & CEO

Min has worked as a white-hat hacker for over 25 years, helping enterprises and governments strengthen their security. A serial entrepreneur, he previously founded and exited SHIFTWORKS, a mobile anti-virus and MDM company, and served on the review board of Hack In The Box.

Advisory board

Strategic advisors

Industry veterans who help us stay ahead of emerging threats.

Andrew Kim

Former Sr. Intelligence Officer, CIA

Former Director of the CIA for the K-Mission Center, recognized with the Presidential Rank Award for exceptional service to national security.

Zuk Avraham

Founder, ZecOps & Zimperium

Serial entrepreneur and cybersecurity expert. Former Founder & Chairman of Zimperium, leading mobile security innovation and threat intelligence.

Perry Ha

Founder & Managing Director, Draper Athena

Venture capital leader and technology investor. Serves on the Board of Trustees and Leadership Board at MIT, driving innovation in enterprise technology.

Backed by

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