Mob4Hire - Mob4Hire provides the mobile marketplace mobile testing services.
UTest - uTest is the world's largest professional network for software testers and test engineers - 175,000+ QA professionals from more than 200 countries and territories.
PingPong UX - The easiest way to run remote user research. Test your product with users worldwide & create experiences they'll love.
Testbirds - Testbirds is a crowdtesting platform with a community of 100,000 testers
Proved - Award-winning platform that makes market research easy, fast and cheap. Instant market validations for products, services and apps.
test IO - QA platform to test web & mobile apps