We are Sift Science. We do trust.

Unfortunately, evil exists. Fortunately, we're here to stop it! Fraud and abuse plague online businesses of all types, from marketplaces to payment processors, social networks to e-commerce stores. As the internet's trust layer, Sift Science's mission is simple yet powerful: make these online experiences faster, smoother, and safer – using the smartest technology around.

Up, up and away!

Risk scores per day



Domains protected

Learning speed



Events analyzed per day

Launched in 2011 from the Y Combinator incubator program, Sift Science has grown into the leading machine learning fraud detection solution for online businesses. Every day, thousands of websites and apps rely on our cloud-based machine learning to eliminate fraud, slash costs, and grow revenue. And we're just getting started.

Meet the team.

With leaders hailing from Google, Amazon, Zillow, Twilio, and New Relic, the Sift Science team has decades of experience building teams and technology, scaling startups, and solving the internet's toughest problems.

A software engineer at heart, Jason was an early engineer at a few Seattle startups (Zillow, Optify, BuzzLabs), before migrating to San Francisco to start Sift Science in 2011. He enjoys chess, basketball, and freestyle rapping.

Jason Tan


Marc is passionate about building high performing teams. His experience in big data and security has helped cloud-focused businesses like Splunk, McAfee, and Dynatrace achieve scale through intense periods of growth.

Marc Olesen

President & COO

Fred loves building well-designed, robust, scalable systems. Before Sift, he was a tech lead at Google, Principal Engineer at Jambool, CTO at Teachstreet, product lead at Zillow and engineer at Amazon.

Fred Sadaghiani


Matt has a passion for building large-scale software systems and high-performing teams. He brings 17 years experience, most recently building models, large-scale simulations, and optimizations for multi-billion-dollar supply-chain decisions.

Matt Green

Head of Engineering

Liz focuses on the most critical asset of an organization - its people. She has startup experience in Technical Recruiting and People Ops and is pursuing her MS from Northwestern in I-O Psychology and Coaching.

Liz Kosinski

Head of People Operations

Thomas loves building products that solve critical business problems. Typical enterprise software shenanigans are his mortal enemy. Prior to Sift, Thomas worked at Twilio, AdMob and Google.

Thomas Schiavone

Head of Product

Our believers.

  • Max Levchin

    PayPal Co-founder

  • Marc Benioff

    Salesforce.com CEO

  • Chris Dixon

    Andreessen Horowitz Partner

Like what you see? Join the team!

We're building an incredible machine learning, big data, cloud, SaaS company in the heart of San Francisco. But hey - we're not all about buzzwords. We're also about defeating evil and making the internet a safe place for everyone!

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