CapMonster works very fast, especially with simple captchas. One thread can process captchas from up to 5 threads of captcha sending software. If there is threads lack, captchas also will be processed, but in queue order.
Pro version allows to solve up to 30000 ReCaptcha2 captchas, 300000 Yandex, VK, Hotmail,
SolveMedia captchas, and more than 150000 other captchas per day. Standart version 4 times less and Lite version 20 times less.