nowfound

Growth · January 31, 2017

21.co

Replace your public email with an inbox that pays you.

Visit site ↗Alternativestop 1% of January 2017

In plain words

21.co is an iOS app that replaces a public email inbox with one that pays users in bitcoin. Users earn cryptocurrency by answering messages and completing tasks, receiving bitcoin rewards for each completed action. The app combines email management with a task-based earning system, appealing to those interested in Web3 and cryptocurrency.

written from the facts on this page · September 2026

From the sources

The 21 app allows you to earn bitcoin in exchange for answering messages and completing tasks. After answering a message or completing a task, you will receive a task reward in bitcoin.

More growth this month

the category →
  • AstraPixels▲267

    ​​A pixel-art solar system at its real current positions.​

    Growth · 29d ago · astrapixels.com

  • WorldMap.lol▲197

    Put your startup on the map. Literally.

    Growth · 13d ago · worldmap.lol

Launched alongside, January 2017

the whole month →