reCAPTCHA is a security service offered by Google that protects websites from fraud and abuse. It uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on websites, while enabling legitimate users to login, make purchases, view pages, or create accounts. The service has been at the forefront of bot mitigation for over a decade and actively protects data for a network of five million sites.

With reCAPTCHA Enterprise, fraud protection can be easily extended across websites rather than being limited to select pages, and it can be integrated into mobile applications using an API-based service. Different versions of reCAPTCHA, including v3 and v2, offer varying features such as customizable risk models, risk-based escalation, enhanced risk scoring, comprehensive site-wide coverage, and enterprise-ready integration. reCAPTCHA also offers free usage for up to 1 million assessments per month and is supported by market-leading Google Cloud terms of service, availability, and support for mission-critical web applications