Proof offers conversion rate optimization solutions for websites to businesses. Allows businesses to display activity notifications and live visitor count, identify visitors, map customer journeys, and control the display of notifications. It claims to support multiple languages and is capable of integrating to third-party applications such as Wordpress, Infusionsoft, and Hubspot, etc, as well. The revenue model is subscription based, starting from USD 29/month. Claims to have 10,000+ websites using this solution which include the likes of Mixergy, Market Hero, and Swanwick, among others. Graduated from Y Combinator.