Total Products under this Category: 481
Last updated: September 01, 2026
Why You Can Trust G2's Software Rankings:
G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.
Highlighted products: RingEX, Nextiva, Zoom Phone, Quo, Dialpad Connect, Webex Calling, Webex Suite, and Aircall.
Underlying data: [Grid® JSON](https://www.g2.com/categories/voip-providers/grids.json?focus%5B%5D=ringex&focus%5B%5D=nextiva&focus%5B%5D=zoom-zoom-phone&focus%5B%5D=quo-quo&focus%5B%5D=dialpad-connect&focus%5B%5D=webex-calling&focus%5B%5D=cisco-webex-suite&focus%5B%5D=aircall)
OnSwitch provides 24/7 technical support and cloud-based phone solutions for small and mid-sized businesses.
OpenScape 4000 delivers converged IP and TDM infrastructure that lets you migrate at your own pace—whether maintaining on-premises control, deploying VMware-based private cloud, or implementing hybrid configurations. This architectural flexibility protects your investment while supporting modern SIP-based communications and legacy digital endpoints simultaneously. Built on proven enterprise technology with active-standby dual node architecture, OpenScape 4000 ensures zero calls lost during system failovers while supporting up to 12,000 users on a single system. Mitel licensing enables seamless portability across the entire OpenScape solution family, protecting your software investment as business requirements evolve.
Optus Loop Live lets you use business phone features on your mobile or PC with a monthly subscription and the Optus Loop Live app.
As one of the UK's leading VoIP providers, we provide business telephone systems for companies of all sizes.
Aragonese company leader, specialized in business consulting services, technological, digital and outsourcing services.
The Nordic region's leading telephone system replaces the traditional switchboard.
The PBXact Business phone system is a fully-featured IP-PBX designed with unified communication features for organizations needing mobility, productivity and collaboration capabilities.
Enterprise quality cloud based business voice solutions. Available to users in 50+ countries with flexible pricing.
Peeringo is a smart cloud phone system with AI-powered voice and messaging, global virtual numbers, and intelligent call routing — helping businesses manage customer communication seamlessly across teams and devices.
peoplefone is an open system, compatible with all VoIP telephone systems and SIP end devices. Our technology is independent of the internet provider. peoplefone has a Europe-wide network of cooperation and system house partners.
Simple, reliable call screening. No per-call charges. Answers professionally, collects details, and emails instantly — predictable every time. 📞 60% sales calls 💡 Only 7% matter ⚡ Setup in 1 minute Key Features ✓Professional call greeting ✓Captures name, number, purpose ✓Instant email summary ✓Rule-based — no unexpected replies ✓24/7 availability Perfect For For founders, small teams, and support desks who want predictable automation — not unpredictable AI. Solo founders Teams ~20 Support desks SMB / B2B 7-Day Trial → Continue Free (with ads) or Upgrade Week 1: Start free (with ads). Your local number activates instantly. After Week 1: Upgrade or continue free if you had 5+ distinct callers. Free Plan with AD: ✔︎ 30+ distinct callers/month ✔︎ Max calls = distinct callers × 1.5 Example: 100 callers → 150 calls
