Real-time identity verification and customer insights.


COMPANY SIZE Between 5 and 10

# OF ENGINEERS Less than 5




TAGS Developer APIs, Legal, YC Summer 2014

What do we do?

BlockScore is an identity verification and anti-fraud solution for online transactions. We make it easy for our customers to verify the identity of their users using just a phone number. We provide an incredibly easy to integrate API which collects information about a business' customers and then validates and enhances that data.

Our goal is to build a replacement for the Social Security Number as a way for people to verify your identity. The SSN should be used purely as a tax identifier, we're building a world where companies can reduce fraud by knowing only your phone number.

Why join us?

1) Identity theft is becoming increasing easy to do online. This makes it harder for companies to know if they're transacting with the right person. Blockscore benefits both sides by making it easy for companies to do easy identity verification, making it harder for fraudsters to succeed.

2) No one currently offers our service of full identity verification using just a telephone number. This makes the product compelling for companies because they see much higher conversion rates on identity checks because they don't need their users to enter lots of additional personal information. Legacy identity verification providers haven't thought about conversion rates because they service old institutions where users are used to handing over lots of information e.g. applying for a loan at a bank.

3) Feedback and learning is a core part of our culture. Every Friday we have Refactor Fridays where everyone stops working on new features and just pauses to go back and improve old code that they wrote and get feedback from other members on the team.

4) We strongly encourage people to open source projects under their own name, not under the company name, so our team members can build up a personal OSS repertoire

Technical challenges

1) We've made a big contribution to mutation testing, in particular we are big contributors to a mutation testing system for Ruby called Mutant. Mutation testing forces you to write testable and decomposable code. The bar for making tests pass is high which requires a lot of discipline and commitment to writing high quality code.

2) We ingest identity data from many disparate data sets. Resolving these accurately, especially as the data itself often has mistakes e.g. there was an error while a paper sheet was being OCR'ed, is a tough technical challenge.

3) Providing fast real-time APIs despite slow government and private data sources is challenging.

Our press coverage

Our Founders

Alain Meier


John Backus


Chris Morton


Our tech stack

  • Ruby
  • Solr
  • Heroku
  • Redis
  • Ruby on Rails
  • PostgreSQL
  • Middleman
  • Mutant (mutation testing)

Our investors

  • Khosla Ventures
  • Lightspeed Venture Partners
  • Battery Ventures