Growth · alternatives · 2026

24 alternatives to 21.co

Replace your public email with an inbox that pays you.

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… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. 21.co launched in 2017; newer entries below may have overtaken it.

1. 1
   Earn.com▲694

   Earn money for replying to emails and completing tasks.

   2017 · coinbase.com · its alternatives →

2. 2
   Earn.com▲130

   Earn money for replying to emails and completing tasks.

   2018 · coinbase.com · its alternatives →

3. 3
   Brew Money▲640

   Earn ~6% APY on crypto with self-custody, withdraw anytime

   2022 · apps.apple.com · its alternatives →

4. 4
   Donut▲292

   Invest your spare change in Bitcoin & earn interest 24/7

   2020 · apps.apple.com · its alternatives →

5. 5
   Coinchange.io▲82

   Earn & buy crypto, get safe passive income from DeFi yield

   2021 · apps.apple.com · its alternatives →

6. 6
   Airdrop by Earn.com▲438

   Get 100,000+ early adopters for your token project

   2018 · its alternatives →

7. 7
   21bitcoin▲66

   Buy & sell bitcoin with this intuitive mobile app

   2021 · 21bitcoin.app · its alternatives →

8. 8
   Cryptalert App▲79

   Never miss a trade by creating alerts on your coins.

   2018 · apps.apple.com · its alternatives →

9. 9IB
   I built a website that lets you freelance for bitcoins▲102

   2012 · btcworkers.com · its alternatives →

10. 10
    EARLY ONES▲234

    Earn crypto by providing feedback on new Web3 products

    2022 · its alternatives →

11. 11
    CoinTracker for iOS & Android▲143

    Track your cryptocurrency portfolio & taxes on the go 📱

    2018 · cointracker.com · its alternatives →

12. 12
    Gracias▲79

    A Bitcoin gifting app

    2019 · its alternatives →

13. 13
    Pine▲80

    Pay your friends with bitcoin

    2020 · pine.pm · its alternatives →

14. 14
    Coinfella▲192

    Request payments in USD & get paid in crypto!

    2024 · aptaixiu.com · its alternatives →

15. 15
    ZEBEDEE▲156

    Play, earn, shop: your portal into rewarded gaming

    2022 · zbdpay.com · its alternatives →

16. 16
    Metal Pay▲145

    Pay your friends and get up to 5% back in crypto.

    2018 · apps.apple.com · its alternatives →

17. 17
    CryptoMarket▲82

    Price tracking app for bitcoin and altcoins

    2017 · its alternatives →

18. 18
    SoloCoin▲89

    An app rewarding social-distancing

    2020 · solocoin.app · its alternatives →

19. 19
    Satoshis Games▲100

    Earn bitcoin by playing games

    2019 · its alternatives →

20. 20
    RewardMe▲76

    Up to 10% cashback in crypto for food, ride and e-commerce

    2021 · reward.me · its alternatives →

21. 21
    BlueWallet▲97

    An easy to use and secure Bitcoin wallet for iOS

    2018 · bluewallet.io · its alternatives →

22. 22
    Crypto DM▲96

    Earn Ether from your supporters on any platform & keep 100%

    2018 · its alternatives →

23. 23
    Reveal for iOS▲108

    "Ask Me Anything" app powered by cryptocurrency

    2015 · reveal.me · its alternatives →

24. 24
    Bitbot▲111

    Manage your cryptocurrency on Messenger

    2017 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →