Vonage has raised $645 million across multiple rounds, including a $330K Series F round in January 2012, a $225M debt round in August 2014, and a major $345M post-IPO round in June 2019. Founded in 2001, Vonage evolved from a consumer VoIP provider into a global enterprise communication platform offering APIs, cloud calling, contact center services, and CRM-integrated solutions. Its funding supported large-scale infrastructure upgrades, acquisitions, and the expansion of its communication API ecosystem powering real-time messaging, voice, and video for enterprises worldwide before its acquisition.