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San Francisco, CA, USAFounded 2015765+ employeesPrivate
$914.6M raisedLate Stage· last: series unknown (Oct 2025)· 12 rounds

Human Interest is a 401(k) provider that makes it easy for small and medium-sized businesses to help their employees save for retirement. The company built an end-to-end technology to solve administrative and compliance problems for small and medium-sized businesses. It also offers easy and affordable employee retirement plans and helped thousands of businesses across America to offer retirement accounts to their employees.

Founders

YC S15

Hiring Pitch

Human Interest is a Y Combinator-backed company that offers an easy and affordable 401(k) retirement plan for the modern workforce. We’ve raised $500M and are backed by leading investors. Most recently, by funding from BlackRock as well as many other top investors: TPG (The Rise Fund) with SoftBank led our Series D, Glynn Capital, NewView Capital, USVP, Wing, Uncork, and others.

Tech Stack

Technologies we use:

  • Back-end: Node (Typescript/ES6 JavaScript, mostly) with a bit of Go
  • Front-end: React, Baobab, GraphQL, Sequelize
  • Cloud: AWS. tTErra
  • Persistence: PostgreSQL + pgAnalyze with a bit of Redis
  • Security: TweetNaCl, scrypt
  • Legacy: Tons of interfacing with other systems via CSVs and SFTP
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