CAPTCHAs are tools designed to differentiate between humans and automated bots, often creating challenges for tasks like web scraping. CAPTCHA solvers have emerged to tackle this issue by using techniques such as optical character recognition (OCR) or human intervention to bypass these tests. Among the various solvers reviewed, Bright Data's Web Unlocker stands out due to its high success rate, speed, and versatility in solving a wide range of CAPTCHA types, along with additional features like IP rotation and proxy integration. Other notable solvers include 2Captcha, which employs human solvers for high accuracy but slower speeds, and AZcaptcha, which uses OCR for quicker, more cost-effective solutions. Each solver offers different pricing models and levels of API integration, catering to diverse needs from quick individual solutions to large-scale enterprise operations.