It wasn’t that long ago that unified communications meant a patchwork of systems bolted together: one platform for calls, another for video, a few more for messaging and file sharing. Now, the top UCaaS providers have reshaped everything we thought we knew about business comms.
UCaaS (Unified Communications as a Service) has matured into something so much more ambitious. Vendors are giving companies more than just cloud calling. They’re offering all-in-one collaboration, customer service management, AI, and flexible APIs.
The result? A crowded market where just about every vendor claims to have the best UCaaS platform. But not all of them deliver the same experience. Some focus on simplicity and speed, others on deep integrations and global reach. A few stand out for how well they blend everything together without adding complexity.
This guide is here to help you sort through it all. We’ve rounded up the top UCaaS providers from our UCaaS vendor marketplace to show you what they’re really offering right now, and what makes each of them worth considering as you plan your next move.
The Top UCaaS Providerrs
- RingCentral
- 8×8
- Vonage
- Dstny
- Intermedia
- Webex by Cisco
- CallTower
- Gamma
- Enreach
- Tata Communications
- Evolve IP
- Masergy (Comcast Business)
- Zoom
- Microsoft Teams
- Aircall
- GoTo
- Wildix
- NTT Global Networks
- BT
- Verizon
The Top UCaaS Providers in 2025: The Hybrid Work Heroes
Not every platform on this list will be the right fit for every business. Some vendors have built out sprawling ecosystems with phone systems, video meetings, contact centers, and developer APIs. Others have kept things simple on purpose, focusing on clean user experiences and faster setup.
But every one of the top UCaaS providers we’ve chose have something in common: they’re forward-thinking, reliable, and all-in on the latest tech. Let’s dive in.
RingCentral
RingCentral is an award-winning technology vendor, named a leader among UCaaS providers by the Gartner Magic Quadrant for 10 years in a row. Its RingEx platform is built to cover nearly every angle: voice, video meetings, messaging, fax, and integrations with dozens of business apps.
RingCentral makes it easy to dive into the cloud. You don’t have to spend months in implementation, and the interface is clean enough that most teams pick it up without much training. Plus, AI is a big part of the ecosystem. Meeting summaries, real-time transcription, and upgraded analytics dashboards are all built in.
The company promises 99.999% uptime, and prioritizes flexibility in its platform, allowing companies to leverage APIs as well as more than 300 third-party integrations. RingCentral also takes security seriously, with tools featuring seven layers of protection.
8×8
Focusing on flexibility, 8×8 takes a modular approach with its communication solutions, allowing companies to build the toolkits they need without compromise. 8×8 Work connects teams and customers with an enterprise-grade PBX, SMS, fax, mobility, and AI assistants.
Teams can tap into AI for chat-based collaboration, recordings, polls, noise suppression, and meeting summaries. Plus, there are tons of collaborative tools to boost creativity, like whiteboards for digital brainstorming. Integration is easy too, with pre-built connectors for CRM systems, platforms like Microsoft Teams, and more.
One thing that sets 8×8 apart as one of the top UCaaS providers for big companies is how much of the world it covers natively. The platform offers local phone numbers and compliance support in over 50 countries, with machine learning-enhanced “Global Reach.”
Vonage
Vonage is one of the more flexible UCaaS providers on the market, taking a turnkey approach to delivering flexible and scalable communication solutions to companies. The company’s UCaaS technology supports 40+ features, plus voice, messaging, SMS, video, and more.
Local numbers are available worldwide, alongside strong administration tools, call recording, and powerful end-to-end security. You also get full control over how everything fits together. If you just want a turnkey setup, you’ll find all the essentials in one app: calling, meetings, chat, and contact management. But if you’d rather build custom experiences, Vonage’s developer platform is a mature option too.
Vonage promises excellent uptimes (99.999%), so you get reliability alongside innovation. Companies can take advantage of Microsoft Teams integrations, SD-WAN capabilities, and CPaaS solutions from the same vendor.
Dstny
Business communications company, Dstny, serves both local businesses and service providers. The company takes a mobile first approach to communications technology, with a flexible cloud-based ecosystem. It also prioritizes ease of use, ensuring its technology is simple to adopt. For companies with specific needs, Dstny can even tailor UCaaS solutions to your specs.
Like most of the top UCaaS providers, Dstny makes sure teams can access everything in one place: video, voice, chat, and even contact center tools. Everything is designed to feel lightweight, and flexibility is a core factor, with support for APIs and integrations.
One thing Dstny does especially well is make it easy for service providers and partners to build their own branded solutions on top of its infrastructure. For end customers, that means more choice and a setup that can be tailored to the specific needs of different industries or regions.
Intermedia
Intermedia’s approach has always been about taking the friction out of running your communications stack. The Unite platform combines business phone capabilities, video conferencing, team chat, and file management, all with cohesive administration controls and security.
You can add in contact center capabilities, link to existing platforms like Microsoft Teams, and empower your staff on any device – headphones, laptops, mobile devices, and more. There’s also end-to-end security built in with triple shield protection. That covers encryption, redundancy, and compliance.
Intermedia has built its technology with a focus on reliability and scalability, with 24/7 customer support, a 99.999% uptime SLA and a solid range of evolving features.
Webex by Cisco
Webex has come a long way from being mostly a video meeting tool. These days, Cisco has turned it into a full suite of unified communications that covers everything from calling and chat to webinars and asynchronous video messages.
One thing Webex does especially well is combine collaboration and customer experience tools under the same umbrella. You can move between meetings, calls, and support interactions without switching platforms, which is a big plus for teams that need to keep everything connected.
AI is a major part of the Webex experience too, with features for summaries, transcriptions, live translations, and real-time employee support. Plus, if you already use Cisco hardware, Webex integrates smoothly, so desk phones, room systems, and software all feel like part of the parcel.
CallTower
CallTower has carved out a space for itself by specializing in fully managed UCaaS solutions that blend in popular collaboration apps. It supports Webex Calling solutions, as well as technologies for voice-enabling Microsoft Teams, and integrating Zoom with your own carrier services. The company has a presence across 60 countries and regions, and 16 geo-redundant data centers.
As one of the top UCaaS providers for partners, CallTower acts as a one-stop shop. It can offer help with full turnkey solutions, dedicated circuits, end-to-end support, and managed hardware. The team handles provisioning, carrier services, and ongoing management, so IT departments can spend less time troubleshooting and more time supporting users.
The company also offers extensive resources, training, and support for all clients, and gives businesses the user-friendly “Connect” portal to help them manage their technologies in one simple environment.
Gamma
Offering solutions for call management, SIP trunking, business phone systems, and connectivity, Gamma simplifies the journey to cloud transformation. Companies can access the organization’s solutions either directly from Gamma, or through their network of specialist partners. Options range from dedicated Microsoft Teams solutions to systems built for channel partners and resellers.
Gamma even offers “simple swap” IP migration solutions, as well as cloud contact center transformation strategies, mobile systems, and cyber security technologies. The company promises end-to-end security from a highly resilient UCaaS network, as well as simple provisioning, billing, and onboarding solutions.
There are tons of handy tools to access too, like CircleLoop for number management, Gamma Horizon for infrastructure, and PhoneLine+ for next-level VoIP.
Enreach
With its “UP” platform, Enreach aims to be one of the top UCaaS providers for truly customizable smart communications. Service providers can build a full system using their own branding, drawing on the power of over 100 operators over five continents.
The system is mobile-first, multi-tenant ready, and ideal for service providers, operators, and resellers of all kinds. Everything is built to be reliable, secure, and compliant form the ground up, with native FMC, APIs for integration, AI enhancement and automation, and plenty of flexibility.
With the EUPCloud, companies also get an intuitive admin portal, built-in video conferencing, and support for designing an informal contact center.
Tata Communications
Digital ecosystem enabler, Tata Communications offers a range of ways for businesses to connect their workforce, upgrade their infrastructure, and serve customers. The GlobalRapide UCaaS platform features global SIP connectivity and fraud prevention as a service for extra peace of mind. The company also offers BYOC solutions and end-to-end UCaaS managed services.
Tata delivers strong security and compliance features, as well as a quick and easy deployment strategy, with expertise in end-to-end services from assessment through to migration, deployment and management. The company also allows organizations to access contact center solutions in conjunction with their UCaaS ecosystems.
There are also dedicated solutions available for companies using Microsoft Teams, Cisco Webex, and JAMVEE.
Evolve IP
Another of the top UCaaS providers also specializing in customer service, Evolve IP helps companies tie their communications tack together. The company offers carrier-grade voice solutions purpose-built for the needs of each customer, which can integrate with industry technologies. You can connect Evolve’s tools with tools like Microsoft Teams and Cisco Webex, and link UCaaS with CCaaS.
Evolve IP promises 99.999% uptime, a secure ecosystem with end-to-end encryption, and international coverage. The company’s UCaaS solutions combine real-time alerts and analytical tools, with CRM system integrations, SIP phone connectivity and more. Plus, the company offers 24/7 support to all of its 500,000+ global users.
Evolve IP even won an award from the UC Today Partner Awards team, for the best “vertical solution” for global projects.
Comcast Business
Comcast Business, which absorbed Masergy, has steadily built out a UCaaS platform that caters to enterprises looking for secure, scalable communications. The solution combines cloud-based calling, video meetings, messaging, and contact center features into one managed service.
One of the platform’s strengths is network performance. Because Comcast owns the underlying infrastructure, companies get optimized voice and video quality, along with built-in redundancy for business continuity.
Comcast Business also offers access to SD-WAN and SASE solutions, SIP trunking, and integrations for Microsoft Teams and Cisco Webex. Plus, companies can take advantage of 24/7 monitoring from certified security and network analysts.
Zoom
Zoom has joined the ranks of the top UCaaS providers in recent years, with its Zoom Workplace platform. The UCaaS offering combines phone, messaging, and video capabilities. Plus, Zoom also offers solutions for events, webinars, and contact center management. The company invests regularly in cutting-edge technologies, like the Zoom AI companion and Zoom Docs.
The platform also offers a straightforward experience for teams that don’t want to spend weeks learning new software. Companies can tap into flexible packages and transparent pricing with a single monthly invoice for all the tools they need.
Zoom’s technology also offers high levels of availability and security, with 256-bit AES encryption. Zoom’s platform can also integrate with various other business tools through a comprehensive app marketplace.
Microsoft (Teams)
Microsoft is constantly taking new strides as one of the top UCaaS providers. The company’s investment in the XR landscape has led to the development of Microsoft Mesh for Teams and Immersive spaces. While AI initiatives have led to proprietary “Copilot” solutions for its Teams platform and productivity tools.
Teams also integrates tightly with the rest of the Microsoft 365 suite. So if you’re already using Outlook, SharePoint, or OneDrive, everything syncs automatically.
One thing that makes Teams stand out is its flexibility. You can bring your own carrier for calling, use Microsoft’s plans, or set up a hybrid approach. Teams also offers end-to-end security and solutions for access management control and compliance via the Purview platform. Specialist packages are available for government and education teams.
Aircall
Aircall has always focused on making business phone systems simpler, especially for growing companies that don’t want a lot of extra baggage. The platform delivers cloud-based voice, call routing, and analytics, all wrapped in a clean interface that teams can learn quickly.
Aircall’s technology connects easily with other tools, like Slack and Salesforce, and offer insights into crucial business metrics in seconds. Plus, companies can build out on their system with Microsoft Teams integrations, and workflow automation tools.
Organizations can also choose to align their UCaaS capabilities with their CCaaS needs using the same platform. The provider promises a 99.999% uptime, as well as a powerful enterprise infrastructure with global scalability.
GoTo
SaaS vendor GoTo offers award-winning solutions for VoIP, meeting technology, remote IT support, and more. The company’s UCaaS product, GoTo connect supports phones, meetings, and messaging in one environment, as well as integrating with the rest of the GoTo portfolio.
Like many of the top UCaaS providers, GoTo offers a 99.999% uptime guarantee, and scalable cloud ecosystem. You can also expect 24/7 customer support, and industry-leading zero trust security. For companies in need of extra peace of mind, individual rights management and custom routing rules are also available.
Those ready to connect UC and CX in one ecosystem can also tap into customer experience tools, with omnichannel support, AI capabilities, and advanced reporting.
Wildix
Offering various VoIP and UC solutions, Wildix is a cloud-based unified communications company, delivering solutions to a broad range of business users. The company is present in 135 countries worldwide, and is ranked as one of the top UCaaS providers in WebRTC.
It delivers solutions that are easy to deploy, compatible with a range of systems, and suitable for mobile work. Plus, Wildix promises its solutions are 100% secure by design, and require minimal customization, saving companies time on configuration.
The Wildix range of solutions also expands to cover contact center and monitoring, customer engagement, video conferencing, SIP trunking and connectivity.
NTT Global Networks
Specializing in SDWAN, UCaaS, and cloud technologies, NTT Global Networks builds custom digital transformation strategies for companies worldwide. The cloud communications division of the company gives businesses both the guidance and technology they need to develop stronger customer and employee experiences in the cloud.
It’s a little different to some of the other top UCaaS providers we’ve mentioned here, but still focuses on helping teams to digitally transform. One thing NTT does well is create a consistent experience across regions. Everyone gets the same quality, wherever they are.
Alongside dedicated UCaaS solutions, NTT Global Networks also offers support for Microsoft Teams Direct Routing and Operator Connect. The brand is also accredited to provide Webex communications solutions.
BT
With solutions to serve small, mid-sized, and enterprise level businesses, BT is a global communications provider serving brands from every industry. The company offers custom solutions to help transform hybrid and digital workplaces, with WAN, enterprise mobile solutions, and site connection capabilities. It also prioritizes the delivery of secure cloud services with in-built cyber security features, threat detection and surveillance.
BT can deliver extensive cloud platform support in collaboration with other UCaaS providers, and even assists organizations with cloud migration strategies. This company focuses heavily on centralizing communications, and making management effortless.
The Cloud Voice offerings are device agnostic, support customisable set-up strategies, and provide every business with end-to-end analytics, and resilience.
Verizon
Global communications company Verizon empowers businesses with flexible network as a service solutions, and unified communications and collaboration as a service. The company’s services are inherently scalable and flexible, with multiple deployment and package options. Verizon can even offer managed services for end-to-end business migration support.
UCaaS systems come with comprehensive enterprise-grade call controls, simplified collaboration tools, and secure connections to a range of applications. The company’s UCaaS solutions are FedRAMP authorized. Plus, the platform 100% application availability with global geographic redundancy, service in more than 100 countries, and 24/7 monitoring and management.
Verizon’s professional services team is a great addition for larger companies with more complicated deployments too.
What to Look for in the Top UCaaS Providers
Choosing a UCaaS platform is a bit like picking a new headquarters. It’s the place where everything happens in today’s workplace, and there’s no one-size-fits-all option. Here’s what’s really worth paying attention to, for enterprise buyers:
- Features: Start by getting clear on what your teams need. Are you mostly calling clients? Running large video meetings? Sharing documents? The strongest platforms pull all of that into one dashboard, and add in extras like AI.
- Reliability: Even the most advanced tools are useless if they suddenly go offline when you need them. Look for providers with an uptime guarantee (most serious players promise 99.999%) and a proven track record of keeping the lights on.
- Security: You’ll be moving a lot of sensitive data through these channels, customer details, contracts, internal plans. So make sure the platform offers encryption, solid authentication, and reliable data backup.
- Scalability: Maybe you’re a team of 20 today, but you have plans to double that in the next two years. A good UCaaS partner won’t make you re-architect everything to grow. Look for flexible plans and clear upgrade paths so you can expand without a painful migration later.
- Integration: The less hopping between apps, the better. Check whether the provider connects easily with your CRM, project management tools, or ERP system. Prebuilt integrations are usually faster to deploy, but APIs are helpful too.
- Support: Sooner or later, something’s going to go sideways. What matters is how fast you can get help. Look for providers with 24/7 support and a reputation for being responsive, not just ticking boxes.
- Cost: Budgets matter. It helps to know exactly what you’re paying for, and what costs might pop up down the road. The best providers will walk you through the fine print and help you figure out which plan actually matches your usage.
What to look for in a UCaaS Partner Program
If you’re thinking about reselling UCaaS or wrapping it into your own services, the partner program you pick can shape how successful you are, and how many headaches you’ll avoid.
Here are a few things worth paying extra attention to:
- Revenue potential: The best UCaaS partner programs offer the potential for significant revenue growth through recurring revenue streams and commission-based compensation models.
- Sales and marketing support: A solid program should give you real support: training sessions, ready-to-go collateral, and help with positioning. The more they invest in your success, the easier it is to build momentum.
- Technical support: Even seasoned teams will run into complex deployments or oddball issues. You’ll want access to engineers who can jump in fast, not just a generic helpdesk.
- Flexibility: Every customer is different. It helps if your program lets you tailor terms, bundle services, or adjust pricing without a lot of red tape.
- Partner community: The best UCaaS partner programs offer access to a vibrant partner community, including forums, events, and other opportunities to network and collaborate with other partners.
- Product portfolio: You’ll be staking your name on these services. Make sure the platform is reliable, secure, and broad enough that you won’t outgrow it in a year.
- Reputation: Choose a UCaaS partner program with a reputation for excellence in the industry. Look for providers with a proven track record of success, as well as positive reviews and ratings from other partners and clients.
To explore the UCaaS Provider market, visit our UC Marketplace to discover the leading providers all in one place.
Ready for the Next Step in your UCaaS Journey?
Picking a unified communications platform used to be something IT handled behind the scenes. Now it’s a huge business project – and multiple people are involved. All of the top UCaaS providers we’ve mentioned here have something great to offer. But if you’re still struggling, we’re here to help.
Here’s how you can move forward with confidence:
- Explore the data: Our latest research reports are packed with up-to-date insights on the biggest trends and opportunities in the UCaaS market.
- Get connected: Join our UC community and swap ideas with market leaders, C-Suite executives, and cutting-edge innovators.
- See the systems in action: Find the upcoming industry events where you can put these solutions to the test, and speak to vendors face-to-face.
- Iron out your buying strategy: Get ready to invest with clarity with our UC Buyer’s Guide brimming with tips on finding, implementing, and optimizing your tech.
UCaaS is the future of communications, leaving legacy headaches behind, and driving companies towards a future of better connectivity, engagement, and productivity. We’re here to help you build a strategy that helps you make the most of your communications stack.
