Is there a test phase for Genymotion SaaS?

Yes, Genymotion SaaS has a free trial. The main site lists “Free trial available” for Genymotion SaaS Cloud, and the product page says it is optimized for automation, CI/CD, and teamwork. Genymotion Genymotion

If you want to evaluate it, the cloud product page is the relevant entry point: Genymotion. For billing and subscription details, the SaaS page also references cloud usage pricing and device management in the cloud. Genymotion