VoIP providers are companies that offer Voice over Internet Protocol services, allowing users to make phone calls using the internet instead of traditional phone lines. This technology converts voice signals into digital data, enabling communication over the web. VoIP services can be used on various devices, including smartphones, computers, and dedicated VoIP phones. Many VoIP providers offer features such as call forwarding, voicemail, and video conferencing, often at lower costs than conventional phone services. Popular providers include Skype, Vonage, and RingCentral, each catering to different needs, from personal use to business communications.