Security consulting

We do penetration tests, source code audit and vulnerability assessment.

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Billing Security

Payment Gateways and their providers, online banking and wallets as well as critical APIs.

Startup Security

Cutting edge application stacks, such as Ruby on Rails, Node.js, Scala etc.


Identity providers, OAuth/Open ID and Single sign-on security.

Bitcoin Security

All things related to crypto-currencies. Hey, we accept Bitcoins too!



As a payments company, security is core to everything Stripe does. I've worked with Egor both through his responsible disclosures as well as a contracted penetration test of Stripe. Egor has always been professional and responsible in his work, and Stripe today is more secure due to his efforts.

Greg Brockman
CTO of Stripe

We’ve been working closely with Egor to identify key weaknesses within our app. Egor is an expert and industry leader in identifying oauth weaknesses. He has helped us identify and resolve potential security holes such as xss, account hijacking, and access token leaking.

Sunil Sadasivan
CTO of Buffer

As a service that provides authentication, authorization and single sign-on infrastructure, security for Auth0 is a top priority. Egor has consistently demonstrated deep expertise in evaluatiing identity protocols, and security in general. Egor did a full audit of our platform and we consider him and his company part of our extended team.

Matias Woloski
CTO of Auth0

Framework vulnerabilities

Sometimes we find various vulnerabilities in popular websites and frameworks just for fun. Let's mention some of them.

We find bugs others cannot.

Reach out to us if you want to see how our security audits can help your business,
or if you have any questions.