Top 10 Best VoIP Phone System Services of 2025
Reliable office phone systems designed to power business communication

Vonage - Best for reliability with 99.99% uptime

Vonage Business emerges as a veteran in the UCaaS landscape, delivering a robust mix of VoIP, SMS, live chat, and video functionalities. This experience translates into a smoother operation than you might find with newer platforms, offering a reliable and refined communication solution for businesses of all sizes.

The platform has 41 built-in features that enhance collaboration, customer engagement, productivity, and employee experience. Agents get tools like Call Announce, which previews the caller's identity and purpose, while managers can access the Busy Lamp Field, showing which lines are active. 

Kevin Peña, Strategic Partnerships Manager at Headsets.com, says, "Since moving to Vonage Business Communications, we have team members working in both home and office stations. They’re able to log in from wherever they are that day seamlessly. We can log in to our VBC accounts and make or receive calls from a cell phone just as easily as an office phone. It’s a simple, user-friendly interface that keeps calls, voicemails, and messages all in one place."

Why we chose Vonage: It offers unique industry-specific solutions for sectors like healthcare, retail, education, and finance. Take healthcare, for instance: the platform enables you to route patients directly to the most suitable medical professional for their particular needs. Also, features like the VisuWell app center integration ensure HIPAA-compliant virtual visits, enabling medical professionals to connect with patients on almost any device.

Our experience: When we integrated Vonage into our operations, the fully customizable virtual AI receptionist saved us a lot of headaches. It allowed us to set up dependable call routing for holidays, lunch, after-hours, and emergencies. With the AI virtual assistant, managing customer engagement became significantly easier for our agents.

RingEX - Best VoIP provider overall

RingCentral’s RingEx cloud communication service is designed for teamwork. It combines all the essentials—VoIP calling, SMS messaging, team chat, and video conferencing into one streamlined package. Enhanced with real-time AI and conversation intelligence, this unified communications as a service (UCaaS) platform transforms how teams collaborate, making every interaction smarter and more efficient.

You can set up a custom-built phone system with ease and invite users via email. You also get features like voicemail transcription, call recording, and adaptive Interactive Voice Response (IVR) menus to enhance self-service routing. Beyond core functions, RingEx offers over 300 app integrations, seamlessly fitting into your existing communication workflow. 

Its HD video meetings require no downloads to join and are supported by AI tools like live captioning and in-meeting transcriptions. Smart features also reduce background noise and keep the camera focused on the speaker.

According to Emma Grotluschen, Senior Manager of Customer Service at Swanson, RingEX Contact Center enables their entire team "to improve [their] customer service operation." She adds, "The reporting capabilities help us continually monitor and improve our performance, and [with] the automatic call recording, our supervisors tripled the calls they can review."

Why we chose RingCentral: You can tailor phone settings like automatic call recording for individual agents and even customize phone numbers, business hours, and caller IDs. Another standout feature is the ability to set basic or advanced call routing rules. Plus, you can adjust ring durations and forward calls with a pre-recorded phone menu. This ensures that customers always connect to the right person without any hassle.

Our experience: When we tested out RingEx, the setup process was remarkably smooth. We appreciated the ability to port both our existing numbers and shared lines without issues. Our agents found it quick and easy to establish new business lines on their personal mobiles, laptops, and desk phones. The RingEx app made syncing everything a breeze, allowing for a hassle-free transition across all devices.

Zoom Phone - Bring your own carrier functionality

Zoom Phone offers a solid VoIP option for small businesses on a budget. It balances cost with various features, making team collaboration easier through messaging, file sharing, and searchable conversations. It also works well with major third-party apps like Microsoft, Google, and Salesforce, which help reduce workflow friction and boost productivity.

For more demanding needs, Zoom Phone offers comprehensive call center capabilities. These include unlimited queues, advanced call distribution, voicemail transcription, and intelligent IVR routing. The system allows effortless call switching between devices, ensuring you stay connected regardless of platform.

Plus, the Bring Your Own Carrier (BYOC) feature offers flexibility. It lets you keep your current PSTN provider while leveraging Zoom's advanced features. This means you can maintain existing contracts and phone numbers while upgrading your setup. 

Why we chose Zoom Phone: Zoom's new analytics tools provide deep insights into call performance and usage patterns. You can monitor detailed metrics for call queues, including SLAs, volume, wait times, and call outcomes. The system also offers Mean Opinion Scores for inbound and outbound calls, allowing you to assess quality across individual sites or your entire network.

Our experience: We've been using Zoom Phone's AI Companion to streamline our meetings and it's transformed how we handle follow-ups. Instead of scrambling to take notes, we now receive concise post-call summaries that capture key points and actions. The voicemail task extraction feature also organizes our call-back priorities directly from our voicemails, ensuring we never miss a beat.