Platform Reviews

These platform profiles have three parts:

  • Background information gathered from the web
  • Reviews based on worker surveys
  • An assessment of the platform’s terms of service

Not all profiles have every part — we’re working on it!

See this page for more information about how the ratings are calculated.

Amazon Mechanical Turk
Writing  Other Microtask  

US-based microtask marketplace run by Amazon.com, Inc. Oldest microtask marketplace.

Terms of Service
Rejection:negative rating Change:negative rating Warranty:negative rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
2.5out of five stars
AppJobber
Mobile Microtasking  

Germany-based mobile microtasking platform active in over a dozen countries in Europe. Most jobs involve taking photos of items in specific places, e.g., sales displays in stores, and pay between € 1 and € 15.

Terms of Service
Rejection:positive rating Change:positive rating Warranty:negative rating Client Contact:positive rating Worker Contact:positive rating
Clickworker
Writing  Software Testing  Mobile Microtasking  Other Microtask  

German microtasking platform. Offers "full service" for clients who want to break down large tasks for crowdsourcing as well as "self service" platform.

Terms of Service
Rejection:negative rating Change:positive rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
2.5out of five stars
content.de
Writing  

Germany-based content/writing platform.

Terms of Service
Rejection:positive rating Change:positive rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Crowd Guru
Other Microtask  

Germany-based microtask platform. Crowd Guru does not offer a “self service” platform; all projects are managed by an employee.

Terms of Service
Rejection:negative rating Change:negative rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
CrowdFlower
Other Microtask  

US-based microtasking platform. Largest English-speaking microtask platform (according to 2014 estimates). Offers "full service" and "self service." Founded 2007 as Dolores Labs.

Terms of Service
Rejection:negative rating Change:negative rating Warranty:negative rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
2.5out of five stars
jovoto
Graphic Design  Writing  Other Freelance  

Germany-based platform for design. The public section is contest-based; a private section pays designers a fixed daily rate to participate in projects.

Terms of Service
Rejection:positive rating Change:positive rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Mylittlejob
Graphic Design  Writing  Other Freelance  Other Microtask  

Germany-based microtask and freelance platform. Workers are students (or former students with university email addresses) in Germany, Austria, Spain, Italy, Denmark, US, and UK.

Terms of Service
Rejection:positive rating Change:negative rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
2.5out of five stars
Prolific
Other Microtask  

UK-based platform, founded to recruit participants for academic microtasks, especially surveys and online experiments.

Terms of Service
Rejection:negative rating Change:negative rating Warranty:negative rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
3out of five stars
Streetspotr
Mobile Microtasking  

Germany-based mobile microtasking platform active in several European countries.

Terms of Service
Rejection:positive rating Change:negative rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Testbirds
Software Testing  

Germany-based software-testing platform. Initiators of the Crowdsourcing Code of Conduct.

Terms of Service
Rejection:positive rating Change:positive rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Upwork
Graphic Design  Writing  Other Freelance  

Largest English-speaking freelance marketplace, with workers in many countries all over the world. Formed in 2013 after merger of Elance and oDesk.

Terms of Service
Rejection:positive rating Change:negative rating Warranty:positive rating Client Contact:positive rating Worker Contact:positive rating
Worker Reviews
3.5out of five stars