8 best VoIP phone system providers for your business in 2025

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VoIP, short for ‘voice over internet protocol,’ has been a staple of business communications for decades, and replaced traditional landlines with internet-based calling. While it’s far from new, it remains an essential tool for modern teams thanks to its reliability, flexibility, and advanced features that go well beyond what legacy phone systems can offer. 

Today’s VoIP systems let employees work from anywhere, provide secure call encryption, and give businesses tools to deliver more personalized, connected customer experiences. With the right setup, you can improve call quality, streamline operations, and keep every interaction in context.

But not all VoIP providers deliver the same level of performance, integrations, or value. In this article, we compare eight leading VoIP services to help you choose the best fit for your business.

TL;DR: 

VoIP has long been a staple in business communications, giving companies flexible, cost-effective calling with advanced features that legacy systems can’t match. In 2025, the best VoIP providers go beyond voice to offer AI tools, analytics, and seamless integrations that help teams work smarter and improve customer experience. 

This guide compares eight leading services, including Aircall, Vonage, Nextiva, Ooma Office and more, so you can find the right mix of pricing, features, and scalability for your business.

How much do the best VoIP providers cost in 2025?

What to keep in mind when choosing a VoIP system

Choosing a VoIP system isn’t just about picking the most popular provider. The right choice depends on how your business operates today and where you plan to take it tomorrow. Before you decide, keep these factors in mind:

• Your specific business needs. Small and large businesses have different requirements. You should also consider the nature of your business. Do you need a massive contact center to handle incoming customer queries, or does your team mainly use phones for outbound sales calls?

• Your plans to scale. How quickly you intend to grow your business should influence which VoIP service provider you go with. You want a provider that scales with you and enables you to add more advanced features as your business needs become more complex.

• Your budget. Closely compare which VoIP providers provide the most advanced range of features with the most basic plan if you’re on a tight budget. Also consider what’s included in each plan and what add-ons you might have to pay for (this can get expensive over time). 

• Your existing tech stack. Pay attention to which business tools each VoIP system integrates with, as you want to be able to connect the software you use every day to whichever solution you choose. 

• Your team’s level of experience. You want a tool that’s easy to implement, no matter who’s working with it—whether it’s your most experienced sales agent or a new employee. You also want to consider the level of onboarding and ongoing support each solution provides.

Why modern businesses should be using VoIP technology 

The reduced hardware and geographic freedom are just the tip of the iceberg when it comes to the benefits of using a VoIP system. Here are some of the ways this software can help your business: 

• Reduced costs: Setting up landlines and paying for handsets for every single employee gets expensive quickly. VoIP systems are much more affordable, as they scale with your business, often without the need for additional hardware. 

• Advanced AI features: VoIP systems come with a range of features that traditional phone systems don’t, like voicemail transcription, analytics and metrics, call summaries, sentiment analysis, key topic recognition, real-time prompts, AI agents, and more.

• Convenient integrations: You can keep your existing tech stack without having to change a thing, as the best business VoIP services will integrate with the tools you already use to reduce manual tasks and improve the customer experience.

• Scalability and flexibility: You can easily add users as more employees join to handle your growing contact center needs. And a good business VoIP solution will allow you to upgrade or downgrade your plan as your business changes.

8 Top VoIP phone system providers 

Choosing the right VoIP provider can transform how your team communicates with customers and colleagues. The best platforms connect with your business tools, automate repetitive tasks, and give you insights that help your team work faster and smarter.

Let’s break down eight of the best VoIP phone providers and highlight their standout features, integrations, and pricing: 

What makes Aircall one of the best VoIP providers for high-performing SMBs?

TL;DR: Aircall is an AI-powered customer communications and intelligence platform built for growing SMB sales and support teams. It offers real-time insights, automation, and 200+ integrations to keep every conversation connected.

Aircall comes with all the features you could need in a VoIP system, from basic capabilities like voicemail and extensions to advanced analytics, smart call routing, and AI-driven conversational intelligence—making it one of the best business phone systems available.

Its AI suite includes AI Assist, which delivers post-call summaries, sentiment analysis, and key topic tagging to identify coaching opportunities. AI Assist Pro supports reps before, during, and after calls with pre-call contact insights, real-time coaching, automated CRM updates, and follow-up emails. Last but not least, Aircall’s AI Voice Agent handles high-volume, repetitive inbound calls, and qualifies leads up-front, so teams can focus on high-value conversations.

The platform is incredibly easy to use and you can have it up and running in minutes without IT support. Once live, it integrates with over 200 tools, including ActiveCampaign, HubSpot, Microsoft Teams, and Salesforce, to surface relevant customer context in real time. That means reps can start calls with the right context, perform better in live conversations, and follow up faster.

Whether your team handles high-volume contact center operations or just needs a straightforward, reliable calling system, Aircall fits the bill for businesses of any size. One way it helps you connect is by letting you choose your own local VoIP phone number to foster trust with customers, increase sales and improve customer satisfaction.

• Features: AI-powered call intelligence, easily automated calling, live call recording, multi-line power dialer, disposition logging, conversation intelligence, and caller ID

• Integrations: 200+, including ActiveCampaign, HubSpot, Microsoft Teams, Salesforce, and Slack

• Pricing: From $30/month/user (annual billing)

Discover the best VoIP phone system provider: an affordable, reliable solution to help you boost customer satisfaction. Try Aircall for free.

Why is Vonage a top VoIP provider for mobile-first SMBs?

TL;DR: Flexible, mobile-first VoIP solutions with AI-powered virtual assistance.

Vonage is a cloud-based business phone system that offers flexible communication tools for small and midsize businesses. It includes features like call flip, which enables you to switch devices during a call, as well as call forwarding services. 

You also get access to an AI virtual assistant that can immediately answer calls, understand requests through conversational AI, and take appropriate actions. This functionality helps to reduce wait times and frees up live agents to focus on more complex queries.

The base plan includes essentials like voicemail and a virtual receptionist, but its premium and advanced tiers unlock more customizable and powerful features. This makes Vondage a solid choice for SMBs that want flexible, AI-enhanced communication tools.

• Features: AI virtual assistant, HD voice for phone calls, call forwarding, call logs and records, business call recording, and team messaging

• Integrations: 24, including Microsoft Dynamics, Microsoft Teams, Salesforce, ServiceNow, and Zendesk

• Pricing: From $13.99/month/extension and taxes and fees (annual billing)

See our Vonage alternatives comparison for more information.

Is Nextiva the best VoIP option for growing SMBs needing omnichannel communication?

TL;DR: Delivers a scalable, omnichannel communication platform tailored for SMBs that need advanced contact center capabilities with robust analytics and seamless integrations.

Nextiva stands out by pairing traditional VoIP features like IVR, automatic call recording, and call routing with comprehensive analytics.User-friendly dashboards give teams clear insights into call performance and customer experience.

Designed for growing businesses and large enterprises alike, Nextiva’s platform helps optimize every customer interaction by providing real-time data and actionable metrics.

Its seamless integration with major CRM and helpdesk tools like HubSpot ensure that sales and support teams have all the context they need to deliver personalized, effective service. 

• Features: IVR, call recording, automatic call distribution, dashboards and reporting, intelligent call routing, and AI classification

• Integrations: 44, including HubSpot, Microsoft Teams, Salesforce, Zendesk, and Zoho

• Pricing: From $15/month/user for small businesses and $75 for enterprises (annual billing)

See our Nextiva alternatives comparison for more information. 

Is Ooma Office the top affordable VoIP choice for small teams?

TL;DR: Affordable, straightforward VoIP solution ideal for small teams seeking reliable call quality and essential business features without complexity.

Ooma Office is a small business phone system designed to help teams connect, collaborate, and serve customers better. It offers standard business and enterprise plans, making it useful for companies of all sizes. 

With the base plan, you get HD audio for high-quality calls, a virtual receptionist to route calls professionally, mobile and desktop app access for on-the-go communication, and Ooma Meetings for easy video conferencing.

The Pro Plus plan builds on this foundation with advanced tools like caller match for personalized greetings, call queuing to manage high call volumes, and hot desking for hybrid teams. Pro Plus plan users also gain access to CRM integrations with platforms like Salesforce and Freshdesk.

• Features: HD audio, virtual receptionist, desktop and mobile apps, call match,  video conferencing and voicemail transcription

• Integrations: 13, including Freshdesk, Microsoft Dynamics, Salesforce, Zendesk, and Zoho

• Pricing: From $19.95/month/user (monthly billing)

See our Ooma alternatives comparison for more information. 

Is Zoom Phone the best VoIP option for Zoom-centric teams?

TL;DR: A cost-effective, fully integrated VoIP solution for businesses already in the Zoom ecosystem. It unifies calling, meetings, and messaging in one platform.

Zoom Phone stands out as the most affordable VoIP service on our list, especially appealing to teams that rely on Zoom for meetings and collaboration. Even the most basic plan comes with helpful features like voicemail transcription, IVR, call recording, and automatic call distribution. However, keep in mind that both domestic and international outbound calls are metered under this plan, which may add extra costs. 

For growing teams, premium plans come with unlimited domestic calling and flexible international options, including add-ons for unlimited calls to select countries. 

All plans include AI Companion tools like post-call summaries, voicemail task extraction and prioritization at no extra cost, helping teams work faster and more efficiently. With a 99.999% uptime SLA, Zoom Phone delivers the reliability businesses need. It also integrates seamlessly with Zoom Meetings, Google Workspace, HubSpot, Microsoft Teams and Slack.

• Features: Mobile and desktop apps, call transfer, call delegation, silent monitoring, and AI Companion with capabilities like voicemail task extraction and voicemail prioritization

• Integrations: 5, including Google Workspace, Microsoft Teams, Salesforce and Slack

• Pricing: From $10/month/user (monthly billing)

Why do enterprise teams choose Dialpad as a leading VoIP provider?

TL;DR: Unified communications platform, powered by proprietary real-time AI to enhance productivity and call performance.

Designed for enterprise teams, Dialpad offers an intuitive, browser-based customer communication platform that’s easy to manage, letting teams add users, forward calls, and access voicemails seamlessly across devices. 

Its AI capabilities stand out with real-time call transcription, keyword detection that flags important terms or phrases mentioned during conversations (such as “cancel,” “upgrade,” or competitor names), and dynamic “Real-Time Assist” coaching cards that guide reps live during calls, reducing ramp-up time and improving outcomes. 

Dialpad also protects your business and customer communications with enterprise-grade security. All calls and data are encrypted, with role-based access controls and single sign-on support for centralized management.

• Features: Real-time transcripts, instant call summaries, AI voice intelligence, AI live coaching, and predictive analytics and customer satisfaction scores 

• Integrations: 79, including Google Workspace, HubSpot, Salesforce, Slack, and Zendesk

• Pricing: $15/month/user

What makes RingCentral one of the top scalable VoIP platforms?

TL;DR: UCaaS provider offering voice, messaging, video, and collaboration tools in a single platform.

RingCentral offers unified communications-as-a-service (UCaaS) with voice, messaging, video calling, and collaboration features integrated into one platform. It also includes standard telephony functions like IVR, call forwarding, and call recording, and supports a broad range of business sizes from small to enterprise. 

Beyond the basics, RingCentral includes features like seamless switching from a call to a video meeting, Call Flip to move an active call between devices with a single click, and unlimited AI Receptionists to handle high volumes of incoming calls professionally.

RingCentral has over 20 years of experience in VoIP and virtual phone systems and provides customer support in multiple countries beyond its US base.The platform aims to consolidate multiple communication and collaboration tools into a single app, reducing the need for separate subscriptions and simplifying your tech stack.

• Features: Unlimited calling, SMS, document sharing, team messaging, HD voice, conferencing, call monitoring and recording, and AI noise cancellation

• Integrations: 500+, including AWS Marketplace, Google Workspace, HubSpot, Microsoft Teams, and Salesforce

• Pricing: $20/month/user

Why is Quo a top VoIP pick for startups and remote teams?

TL;DR: An affordable VoIP solution for small teams with unlimited U.S. and Canada calling and texting, plus AI-powered call summaries and voicemail transcripts.

Quo (formerly OpenPhone) is an AI-powered phone system designed for startups and small businesses. It provides teams with unlimited domestic calls and texts, AI-generated call summaries, voicemail transcription, shared phone numbers, and the ability to schedule messages.

Its standout feature is its Sona AI agent which answers calls instantly, logs key details, and provides tailored responses based on your business information, ensuring you never miss an opportunity. The platform consolidates calls, texts, and customer history in one view, making it easy for teams to stay aligned.

While it lacks video conferencing and desktop phone support, its affordability and AI features stand out for teams focused on voice communication.

• Features: AI-powered call summaries and transcripts, AI contact suggestions, phone menus, group calling, and API

• Integrations: 8, including HubSpot, Jobber, Make, Salesforce, and Zapier

• Pricing: $15/month/user

Which VoIP providers integrate best with CRM systems?

A major factor in choosing a VoIP system is how well it connects with the tools your team already uses. Strong CRM integrations make it easier to keep customer data updated, reduce manual tasks, and give your team the context they need before every call.

• Aircall connects with more than 200 apps, including Salesforce, HubSpot, and Zendesk. This makes it a strong choice for SMBs that want customer insights to flow automatically into their CRM.

• RingCentral has one of the most extensive integration libraries in the industry, with 500+ apps across CRM, productivity, and collaboration categories. It’s a good fit for larger businesses with more complex tech stacks.

• Nextiva offers seamless integrations with Salesforce, HubSpot, and Microsoft Teams, making it easy to bring customer and communications data into one place.

For smaller businesses, OpenPhone provides Zapier-powered connections, giving teams a simple way to link calls with the workflows and apps they already rely on.

Which VoIP services are best for remote and global teams?

Remote and globally distributed teams need a VoIP solution that works anywhere, scales internationally, and integrates seamlessly with their existing workflows.

• Zoom Phone is an affordable option for distributed teams already using Zoom, with international calling add-ons that make global collaboration easier.

• RingCentral supports local numbers in over 100 countries and offers a 99.999% uptime SLA, making it a reliable choice for multinational organizations.

• Aircall combines global voice coverage with integrations for Slack, Microsoft Teams, and Salesforce, giving remote teams the context they need to work smarter.

• Vonage is well-suited for mobile-first teams thanks to flexible features like call flip and an AI virtual assistant that works across devices.

Which VoIP providers lead in AI and automation features?

AI is no longer just a nice-to-have in VoIP—it’s becoming a core differentiator. The best providers use it to streamline workflows, improve call performance, and give teams more actionable insights.

• Dialpad leads the way with real-time transcription, keyword detection, AI coaching, and predictive analytics built into every plan.

• Aircall offers AI Assist, which provides post-call summaries, sentiment analysis, and real-time coaching to help sales and support teams improve faster.

• Zoom Phone integrates its AI Companion across plans, offering tools like voicemail task extraction, summarization, and prioritization at no extra cost.

• OpenPhone delivers AI-powered call summaries and transcripts, making advanced automation accessible to smaller teams at an affordable price.

Aircall: The AI-powered phone system built for modern teams

With AI-powered conversation intelligence, Aircall transforms business communications from a simple phone system into a strategic growth engine.

Puls experienced this firsthand when it consolidated multiple providers into Aircall to create a single, connected platform for voice, messaging, and customer operations. Features like AI-generated call summaries, sentiment analysis, and smart call routing make operations smoother and allows for faster decision-making, improved customer satisfaction, and reduced service errors.

Puls’s success is just one example. Aircall’s 200+ integrations, global voice coverage, and 99.95% uptime give any sales or customer support team the infrastructure to optimize their workflows. By combining reliable cloud telephony with AI insights, managers get a clear view of performance while agents have the tools to deliver more personalized, effective conversations.

For businesses that want more than a phone line, Aircall delivers a connected communications hub. One that turns every customer interaction into an opportunity to learn, improve, and grow. 

Discover the best VoIP phone system provider: an affordable, reliable solution to help you boost customer satisfaction. Try Aircall for free.

Frequently asked questions about best VoIP providers

Which VoIP brand is best?

The best VoIP brand for you depends on your business needs, but we firmly believe Aircall is one of the best VoIP service providers on the market. We provide a range of advanced features at an affordable price, so you get the best value for your money. 

What is one of the most popular VoIP services?

One of the most popular business VoIP services is Aircall, which provides reliable uptime and crystal-clear clarity on VoIP calls. The platform is easy to set up and incredibly intuitive, meaning any of your employees can start using it with little onboarding required.  

What is the best VoIP to call a landline? 

The best VoIP to call a landline is one that offers HD-quality audio and little-to-no latency. At Aircall, we’re proud of the high quality of our phone calls, and our latency is always as low as possible.

What is the best VoIP service provider?

There is no single “best” VoIP provider; options like Aircall, Vonage, Nextiva, Ooma Office, Zoom Phone, Dialpad, RingCentral, and OpenPhone each have strengths. The right choice depends on whether your priority is pricing, integrations, global coverage, or AI-powered features.

Who is the cheapest VoIP phone provider?

Pricing changes frequently, but some of the most budget-friendly options include Zoom Phone, Nextiva, and Vonage. These providers often offer lower-cost plans with essential calling features, though advanced tools may require upgrades.

Is VoIP better than WiFi calling?

VoIP and Wi-Fi both route calls over the internet, but they serve different purposes. VoIP is a full business phone system that works over any internet connection (wired or wireless) and includes business features like call routing and recording. Wi-Fi calling is a mobile carrier feature designed mainly for personal calls when cellular signal is weak.

Which mobile VoIP is best?

The best mobile VoIP app depends on the features you need. Aircall, Dialpad, and RingCentral have robust mobile apps with call management, voicemail transcription, and integrations. OpenPhone is also a strong option for small teams looking for simplicity and affordability.

Published on November 1, 2024.