OnSIP
OnSIP is a hosted VoIP service provider offering cloud-based business phone systems and communication tools.
Last updated September 1, 2026
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Overview
OnSIP provides secure and scalable cloud-based communication services, including hosted VoIP, messaging, video conferencing, and collaboration tools. Since 2004, its patented technology has delivered hosted PBX solutions without the cost and inflexibility of legacy systems. Trusted by over 150,000 businesses, OnSIP offers customizable phone systems with month-to-month contracts and includes best-in-class VoIP phones with its Unlimited plan.
History
OnSIP has been providing cloud-based communication services since 2004, using patented technology to deliver hosted PBX solutions without the high cost and inflexibility of legacy systems.
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