Vonage Holdings Corp. is an American telecommunications company specializing in providing internet-based phone services, primarily for households and small businesses. Founded in 2001, the company is best known for its VoIP (Voice over Internet Protocol) technology, which enables phone calls over the internet. Vonage offers various services including voice and video calls, text messaging, and cloud communication solutions for businesses. In recent years, the company has focused on expanding its cloud and API (Application Programming Interface) services for corporate clients.