# Earn.com

> Paid email and micropayments platform (formerly 21.co).

## Why it is interesting

Earn pivoted from bitcoin mining hardware to paid inbox; a16z's Balaji Srinivasan became Coinbase CTO when Coinbase acquired Earn for $100M+ in 2018.

## Profile

- **Stage:** acquired
- **Status:** acquired
- **Industries:** crypto-web3, fintech
- **Coverage:** full
- **Last updated:** 2026-07-24

## Key facts

- Acquired by Coinbase (Apr 2018): >$100M cash, stock, and crypto; Balaji Srinivasan became CTO (TechCrunch)
- Prior rounds: a16z, Khosla Ventures, Qualcomm Ventures (~$120M+ raised)
- Source: https://techcrunch.com/2018/04/16/coinbase-buys-earn-com-and-makes-ceo-balaji-srinivasan-its-first-cto/

## Investors in our directory

- https://venturecapitaltracker.com/fund/andreessen-horowitz
- https://venturecapitaltracker.com/fund/khosla-ventures

## Related articles

- https://venturecapitaltracker.com/2026-a16z-hot-portfolio-companies

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Source: https://venturecapitaltracker.com/startup/earncom