GeeTest CAPTCHA v4 is GeeTest's behaviour-verification product. It distinguishes human users from automated scripts and bots and adapts the difficulty of the challenge to risk: higher-risk users get a harder challenge, lower-risk users an easier one. GeeTest cites uses such as login, registration, purchases, voting and posting, and says it can also protect gateways, SMS services and interfaces. The service is offered as a cloud service that, according to the vendor, can be integrated within hours; developer documentation is available online. The product is not open source.
The provider is Wuhan Jiyi Network Technology Co., Ltd., a Chinese company. GeeTest's privacy policy states that personal information is stored within the territory of the People's Republic of China, and it places responsibility for cross-border transfers on the developer who uses the service outside mainland China. European organisations should therefore assess for themselves whether transferring data to China fits within the GDPR and their own requirements.