--- title: The 21 Marketplace Reviews meta_title: 'The 21 Marketplace Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter reviews by the users' company size, role or industry to find out how The 21 Marketplace works for a business like yours. aggregate_rating: rating_value: 5.0 review_count: 1 scale: '5' date_modified: '2025-12-01' parent_category: name: Development url: https://www.g2.com/categories/development --- # The 21 Marketplace Reviews **Vendor:** 21.co **Category:** [API Marketplaces](https://www.g2.com/categories/api-marketplace) **Average Rating:** 5.0/5.0 **Total Reviews:** 1 ## About The 21 Marketplace Discover, buy, and sell bitcoin-payable APIs at The 21 Marketplace ## The 21 Marketplace Reviews ### 1. 21 Marketplace or former Earn is the best **Rating:** 5.0/5.0 stars **Reviewed by:** Valentin B. | Physics Tutor, Small-Business (50 or fewer emp.) **Reviewed Date:** January 28, 2019 **What do you like best about The 21 Marketplace?** 21 Marketplace (formerly Earn) is a website where you can sign in and be paid for doing simple tasks and replying to simple paid messages that you receive every day. They are paying you for every message that you answer. You receive 1 dollar for one message answered. On the average you receive 1 message to answer every 2-6 days, some years ago there were many messages to answer. I can say that I have made with this website 0.06 Bitcoin in a year some years ago for answering simple messages that they have sent me every 3-6 days. They questions that they are asking you in their messages are very interesting. This website was from the very beginning a good idea, receive money to read and answer to (some) emails. When they started the name of the 21 Marketplace was Earn. **What do you dislike about The 21 Marketplace?** At the beginning there were many messages to answer, today they send you a message every week. Years ago this website was very good for making money, today you can make half of the money you were making some years ago. What I do not like is that when answering their mesages, after being paid 1 dollar in bitcoin, the senders of the messages promise you some tokens (they arrive in myetherwallet). These tokens arrive in 1-4 months to you and you can not do something with them because their dollar value is too low to be exchanged for ethereum or bitcoin. Thus you earn 1 dollar in bitcoin for every message that you answer and some tokens that have no value. **Recommendations to others considering The 21 Marketplace:** Earn was very good for earning some bitcoin a year ago. They were sending every day a paid messge to answer. Today Earn is sending a message every week, my guess is that Earn is having too many users. Earn is very good, and you can earn with tham 0.01 - 0.06 bitcoin every year. **What problems is The 21 Marketplace solving and how is that benefiting you?** I am trying to earn some money answering simple messages. ## The 21 Marketplace Discussions - [What is The 21 Marketplace used for?](https://www.g2.com/discussions/the-21-marketplace-what-is-the-21-marketplace-used-for) - [What is The 21 Marketplace used for?](https://www.g2.com/discussions/what-is-the-21-marketplace-used-for) - [View The 21 Marketplace pricing details and edition comparison](https://www.g2.com/products/the-21-marketplace/reviews?section=pricing&secure%5Bexpires_at%5D=2026-08-06+05%3A17%3A48+-0500&secure%5Bsession_id%5D=dc0a2a25-f113-4480-8e7f-0419fb51d12e&secure%5Btoken%5D=864441c57c84ffba8e3d260449f184c2252a0b93befee06808e4a98a2cccde56&format=llm_user) ## Top The 21 Marketplace Alternatives - [Zapier](https://www.g2.com/products/zapier/reviews) - 4.5/5.0 (2,062 reviews) - [Celigo](https://www.g2.com/products/celigo/reviews) - 4.6/5.0 (1,067 reviews) - [MuleSoft Anypoint Platform](https://www.g2.com/products/mulesoft-anypoint-platform/reviews) - 4.5/5.0 (657 reviews)