Best SIP Trunk Providers for Windows of 2025

RingCentral RingEX

RingCentral

RingCentral RingEX is a powerful cloud-based phone system that helps optimize your business communications. Providing enterprise-grade business communication tools for voice, fax, text, and video as well as bring your own device to work (BYOD) capability, RingCentral RingEX enables you to work where you want and how you want. Core features of RingCentral RingEX include auto-recording, conferencing, and unlimited long-distance and local calling. RingCentral RingEX's call management features can also be customized by configuring call forwarding, answering rules, message alerts, and missed-call notifications.

3,120 Ratings

Starting Price: $19.99/month/user

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Twilio

Twilio's Elastic SIP Trunking provides a robust and scalable solution for businesses looking to modernize their communication infrastructure. By leveraging the Session Initiation Protocol (SIP), Twilio enables seamless voice and multimedia communication over the internet, eliminating the need for traditional circuit-switched lines. With Twilio's SIP Trunking, businesses can quickly set up and manage phone numbers, reducing the time to create a new number from days to seconds. This flexibility is complemented by Twilio's global reach, allowing businesses to connect with customers worldwide with high-quality voice calls. Twilio's platform supports a range of real-time communication services, including voice calls, instant messaging, and multimedia conferences. The standardized nature of Twilio's SIP Trunking simplifies integration, avoiding the complexities associated with legacy carriers.

1,319 Ratings

Starting Price: $0.0085 per min

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Squaretalk

Squaretalk is a powerful contact center solution that transforms how modern teams connect with prospects and customers, convert sales opportunities, and grow their operations. The combination of AI Voice Agents, calling and WhatsApp Business messaging, AI-powered automation, and affordable scalability ensures that companies of all sizes shorten their sales cycle and elevate outreach without additional complexity or costs. Squaretalk’s platform offers omnichannel communication, powerful call-handling features, automated transcripts, sentiment analysis, contact management, customizable workflows, advanced reporting, and enterprise-grade security. With local numbers in over 150 popular and niche destinations, we enable businesses to establish and maintain a local presence, build trust, and support their global expansion. Discover how Squaretalk’s cloud contact center platform can enhance your team’s connection rates and performance.

250 Ratings

Starting Price: $25/month/user

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Insider Telecom

Get a business phone system without breaking the bank! We help small businesses in the United States get access to big business tools, while keeping prices within reach. In fact, with Insider Telecom, we provide the equipment as long as you need it. Enjoy features like caller ID, call forwarding, conference calling, intercom, auto attendant, and many more! No big upfront purchase for a complete business phone service. That's the Insider Telecom difference. Our support team knows that you probably don't speak "telephone." So they're trained to listen for and understand the root of your specific need - from training and configuration, all the way to fitting you with a different phone system. We want to be sure you're working with the right platform.

1 Rating

Starting Price: $17.95 per user per month

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T-Max Phone Systems

T-Max

The Hosted Business Phone System PBX will make any company sound and function like a Fortune 500 company. Your company can have all your calls answered by an auto-attendant allowing for callers to choose departments, extensions, dial by name or many other options. If you are working on the go you can have them automatically transferred to your cell phone. T-Max is fully geo-redundant. In other words, our servers are being hosted in a top-notch data centers throughout the United States. We use multiple carriers ensuring maximum connectivity to the PSTN. T-Max uses high-quality desk phones from Polycom & Yealink, with many different models to pick from to fit your unique environment best. We offer reception consoles, agent phones, wireless phones, and conference room phones. Our Hosted Business Phone System is the best choice for the price on the market today. 1-888-245-3483 Departments Extensions Digital Receptionist Voice Prompts Voice Mail Fax Service and Much More

Starting Price: $19.99 Mo/Ext

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XCastLabs

The First and Still the Best in VoIP Communication! Our proprietary technology has been providing telecom services for over 20 years. XCast’s broad suite of products—Hosted IP-PBX, SIP Trunking, Carrier Services and Call Center Solutions—are available directly from XCastLabs or through our white label Resellers, our agent partners, carriers or call centers. XCast exceptional service, rates, and products meet the FCC standards for STIR/SHAKEN network compliance. XCast’s Hosted PBX solution is delivered over the Internet to any of your connected devices. Promotional plans start as low as $9.95 per month and include FREE Outbound minutes and a FREE Yealink Business Phone per extension. Sip Trunk Plans begin at $4.95 w/unlimited inbound minutes and free installation. Our Automatic Call Distribution (ACD) system has full reporting, automated customer callback, custom prompts, music on-hold, call recording, call monitoring (with whisper and barge-in), call transfer and more!

29 Ratings

Starting Price: $4.95/month

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Zadarma

Powerful Cloud Telephony for Global Businesses Zadarma offers a feature-rich VoIP platform designed for businesses that want flexibility, scalability, and professional communication without high costs. Set up your cloud PBX in minutes, manage international teams, and serve customers worldwide — all from a single interface. Key features: - Virtual phone numbers in 110+ countries - Free cloud PBX with IVR, call routing, and analytics - Integration with CRMs: HubSpot, Zoho, Bitrix24, and more - Apps for desktop, mobile, and browser-based calling - AI-powered voice agents and call tracking - Full control via web interface and API Ideal for remote teams, support centers, and growing companies looking to modernize their phone systems.

12 Ratings

Starting Price: $2/month

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Telnyx

See how the developer friendly Telnyx API can transform your business communications. Telnyx is an all-in-one communication platform designed to be tailored exactly to your needs. We created our network with real-time communications in mind so we can deliver quality calls, messaging, and data around the world. Easily build reliable messaging with our SMS API. Keep your data safe by setting up two-factor authentication using SMS or voice codes. Plug and play your VoIP setup in minutes and get carrier-grade voice with elastic SIP trunks. Our cloud-agnostic approach means you can rest easy knowing you are protecting in case of a network failure. With Telnyx deploy communications exactly to specifications.

8 Ratings

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Vonage Business

Vonage

Vonage Business is a leading cloud communications platform for businesses of all sizes and industries. Vonage Business covers all the communication needs of organizations looking to succeed, offering more than 40 business-critical features, mobility, conferencing, and integration with top cloud applications. Trusted by more than 500,000 business users, Vonage is available in a number of plans and packages that fit various business requirements.

3 Ratings

Starting Price: $19.99/month/user

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Voyced

Hosted VoIP solution with a European focus but with presence in over a 165+ countries. As all our solutions are based on Premium Plus we give you the highest possible quality for the lowest price. All carry all types of numbers, from Geographic to National, TollFree and UIFN, Mobile VoIP, Elastic Pool solutions and much more. We also have our own SoftPhone and will soon be launching other Roaming products too.

2 Ratings

Starting Price: $0.25 per user per month

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Global Call Forwarding

Buy toll-free numbers and local phone numbers from more than 160 countries without commitment. You can route incoming calls to any phone, PBX, or SIP worldwide. Our global network has multiple layers of redundancy. Make international outbound calls and show any of your business phone numbers as Caller ID. Connect our SIP trunks to your phone system or use the GCF softphone to make outbound calls. Easily set up and modify smart call routing features like auto-attendant / IVR, location & time-based routing, local ringback tones, simultaneous ring, customized greetings, call recording, voicemail, and more. Easily add or remove virtual numbers, change calling plans, download your invoices and call detail records, modify advanced features, reach live technical support 24/7, and contact your account manager.

1 Rating

Starting Price: $7.95 per month

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8x8

A single platform that combines cloud phone, video collaboration, team chat, contact center and analytics. Optimize your organization's total cost of ownership by giving each user the exact features needed for the job. Eliminate organizational silos with full analytics and collaboration between contact center agents and functional area experts. Single administration tool for system setup, with user and data management. Combine call, directory, video conferencing, chat and contact center in a single license. Connect your business around the globe with enterprise-grade reliability and quality in the cloud. Schedule, start or join HD video and audio conferences from any device or room with no friction. Easily access your contacts whether they are colleagues on the same account or an external user. Design better customer experiences with an intelligent, collaborative, and reliable solution.

1 Rating

Starting Price: $19.99 per month

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Sherweb

A secure and reliable solution for your online business. Everything you need to get started. A user-friendly control panel to manage your website. Experienced support technicians. Access to a huge library of pre-configured web apps for your website. With Sherweb as your trusted cloud partner, you’ll be surprised by what you can achieve. Our full-fledged cloud management platform, driven by evolving business needs, empowers IT professionals to leverage agile solutions paired with 5-star service by trusted experts they can count on. We’re born in the cloud – IT folks rest easy knowing our ever-expanding portfolio of innovative products has been hand-picked and pre-vetted, including a selection of proprietary software you won’t find anywhere else. We bring you a mature, powerful platform that doesn’t make you choose between saving time and saving costs. Automate and integrate just about anything, leveraging our cutting-edge APIs. 

1 Rating

Starting Price: $7.25 per month

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Spoke Phone

Spoke Network

Spoke is the leading platform for high-value, complex, and regulated conversations. Spoke guides employees to say and collect the right things so deals move forward and customers get better experiences. Spoke integrates with everything, personalizing conversations, driving productivity, and ensuring compliance. Trusted for over 250,000 conversations every day with features such as calls, SMS, WhatsApp, Team Inbox, programmable routing, Personalized IVRs, caller insights, forms, analytics, +more. The Problem Today, only a small portion of your employees are equipped or have the skills to have highly-contextual, complex, and personalized customer conversations. The Solution Spoke empowers every employee with the information and skills to hold high-quality compliant conversations that drive positive customer and business outcomes.

Starting Price: $15 per month

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OnSIP

Junction Networks

OnSIP delivers powerfully simple business communications services to more than 100,000 customer accounts. We’re proud to provide the benefits of an on-demand phone system without the high cost, burden, and inflexibility of traditional phone systems. With unprecedented pricing flexibility and no contracts, you can customize your communications by adding users and features and enjoy enterprise-level communications without commitment. Set up is easy and backed by free onboarding and award-winning, U.S-based support. Unlimited plans include a variety of features – voicemail to email, ring groups, call parking, music on hold, video conferencing, call recording, dial-by-name directories and free SIP phones for 5+ users. OnSIP’s platform is built on patented, geographically distributed technology to provide 100% redundancy and massive scalability. Enjoy the confidence that your phone system is always up and always on to keep your teams connected. Sign up for a free trial today!

Starting Price: $18.95 per month

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2600Hz

An unrivaled UCaaS solution designed to empower Service Provider success. Differentiate your brand and offering in the market with a completely customizable, white label solution. KAZOO is 2600Hz's turnkey UC platform, offering the flexibility you need to provide a superior communication experience. Give your customers a communication solution that will make them successful. 300+ APIs enable you to customize a solution to help your customers do business better. White label your solution to build and maintain your brand recognition in the market. Low upfront costs let you get started quicker and stay cost competitive. Reliability and geo-redundancy ensures your customers are always online. Mobile ready lets your customers get business done when and where they need to. KAZOO is a multi-tenant platform and gives you the ability to open your sales channels. Bring on resellers, go direct, or have an agent model.

Starting Price: $3.50/month

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OfficeConnect

UniVoIP

OfficeConnect™ provides unified voice, conferencing, messaging, fax, and more. Our state-of-the-art VoIP phones are far more flexible and cost-effective than legacy on-premises systems. Keep your projects moving and synchronize your teams with best-in-class audio and video conferencing made simple. UniVoIP encrypts all voice packets—from both remote and on-site phones—using SRTP with 128-bit AES encryption. SRTP is compliant with both the federal standards for FIPS 140-2 Certified Encryption and the Department of Defense’s PKI Digital Certificate.

Starting Price: $18.95 per user per month

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CloudCall

CloudCall is the only communications software dedicated to businesses who use CRMs. By capturing all calls and communications, and saving them into the CRM contact records, CloudCall helps businesses make more insightful decisions, stay in control of teams working from anywhere, and get more done faster. Let data drive your business Capture data from your communications, surface key insights, and automate key workflows. Saving time, increasing efficiency and profits. Get more control Keep everything in your CRM and see how your teams are doing from anywhere. Boost productivity and profits Make more placements, close more deals, get more done faster, with Click-to-call, Power Dialler and Automated workflows.

Starting Price: $15/user/month

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Nextiva

Nextiva is an AI-powered Unified Customer Experience Management (Unified-CXM) platform that helps businesses acquire, retain, and grow customers through seamless, personalized interactions. It unifies voice, chat, messaging, social, email, video, and reviews into one platform, eliminating silos and improving collaboration across teams. With patented customer journey orchestration, companies gain real-time insights and automate workflows that improve customer retention while lowering costs. Built-in AI and automation simplify self-service, optimize agent productivity, and deliver measurable efficiency. Nextiva’s workforce engagement tools reduce attrition, boost performance, and connect front-line employees with back-office teams. Trusted by thousands of innovative companies worldwide, and recognized as a Strong Performer in Gartner’s 2025 “Voice of the Customer” CCaaS report, Nextiva is redefining how businesses deliver meaningful customer experiences.

Starting Price: $19.95 per month

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IPFone

IPFone is a telecommunications company that provides cloud communication, internet access, and business phone systems for small and medium-sized businesses. IPFone's services include: UCaaS Webex VoIP SD-WAN Contact center Fiber internet On-site installation In-depth training World-class customer support Unlimited international* calling

Starting Price: 17.95

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China Telecom

China Telecom Americas

China Telecom (Americas) Corporation (CTA) provides customized, cost-effective and integrated network and communication solutions to its diverse base of customers. As a leading facility-resale private carrier with unique access to providers in Asia and the Americas, we offer a wide range of communication and data center services for multinational customers. CTA is headquartered in Herndon, Virginia, with offices in Chicago, Dallas, Los Angeles, San Jose, Sao Paulo and Toronto. Enterprises throughout the Americas trust CTA’s one-stop, turnkey solutions to meet the challenges of today’s complex business environment.

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banter

banter.io

Why do business phone lines cost so much? Get a business phone line starting at $4.99/month. Add a business line to your personal phone, so you can do business on the go. Get a robust and reliable business phone system without wasting money on unnecessary office phone systems. Keep your personal number private and receive business calls through your smartphone using the mobile app. banter differentiates business calls from personal so you can always make the right impression. Get your business calls sent straight to your cell phone. No expensive phone system required. You can make a call using your desk phone, PC or smartphone. Ease of integration, progressive technology, and a simple interface is what makes us stand apart from the rest. We offer the most sophisticated VoIP system that is simple to operate. Always get notified of your incoming calls on multiple channels. Integrate multiple communication channels with banter for faster interactions with your potential customers.

Starting Price: $4.99 per month

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peachcomm VoIP

Peachcomm

With PeachComm, your business can choose the industry-leading Cisco Webex platform that is leading digital transformation and communication innovation. We’ve been a proud, certified partner since 2001. Dedicated communications specialists start with your business in mind to create a customized phone system that works with your unique needs. From desktop phones to receptionist consoles to call center phones, we have a model that meets your business needs. PeachComm has proudly been a Cisco partner (formerly BroadSoft) since 2001. Cisco takes customer security very seriously investing in technology and creating innovative solutions to ensure your business is protected. No counting minutes with our unlimited calling for all of users. Connect with business applications and other cloud services. Desktop, Tablet and Smartphone applications for PC and Mac. Answer calls 24/7. Provide personalized messages & route calls.

Starting Price: $19.95 per month

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Pulse

Pulse Telesystems Private Limited

Pulse is recognized as a leading provider of call center solutions that effectively utilize Web Real-Time communication to enhance the efficiency of call center operations. With nearly two decades of experience, Pulse has successfully assisted clients across Pan India, Northern America, and Europe in establishing seamless customer interactions at every touchpoint. By optimizing the customer journey and maximizing revenue and loyalty, Pulse enables businesses to meet their customers' requirements through personalized call center solutions equipped with advanced features. These features promote proactive customer engagement and deliver exceptional user experiences.

Starting Price: $14.51

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VoIPline Telecom

Take control of your business communications. No technical skills are required. VoIPline Telecom's phone system provides you with full control over your business communications using a visual block diagram accessible via any web browser. Drag-and-drop configuration: Add over 30 telephony configuration tools to the canvas with a simple drag-and-drop. Arrange objects as you like. Visual call flow customisation: Customise the flow for incoming calls by linking one object to another. The entire call flow is visually clear even for users with no technical skills - you can see every step of how an incoming call will be handled step by step. Separate call logic with tabs: In addition to a single call flow configuration canvas, a whole host of such canvases can be created. This can be useful to separate the call logic so as not to overcomplicate a single canvas.

Starting Price: $1.05

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pascom ONE

pascom GmbH

pascom ONE is a cloud-based, all-in-one phone system solution that is designed to help companies upgrade their business communications by combining all your voice, chat, video and virtual fax into a single solution. pascom's Desktop and Softphone apps ensure that no matter where you work, in the office, in Home Office or on the go, you can stay connected with colleagues and customers from anywhere. By providing unified access to all your contacts, chats, team messaging and web meeting channels, pascom ONE is more than just a cloud phone system, it is the heart beat of all your essential everyday business communications.

Starting Price: €8.90/concurrent user/month

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Broadvoice

Broadvoice simplifies communications for small and medium businesses (SMBs) by combining powerful cloud PBX, UC and collaboration features with virtual call center in one award-winning Unified Communications as a Service (UCaaS) platform that delivers enterprise-class features at affordable rates. The platform is connected to Broadvoice’s secure, redundant network and hosting infrastructure, enabling SMBs to connect with customers securely anytime, anywhere and with any device. Broadvoice is ranked in the Deloitte Technology Fast 500 and Inc. 500 Fastest Growing Private Companies in America.

Starting Price: $10/month

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Impact Telecom

Impact Tech

Deliver the sales, support, and marketing your customers want by using our AI-driven products. Achieving success in today’s hyper-connected world requires a coordinated customer management system that connects every client interaction. Impact CRM brings together all the information your team needs to provide the best customer experience and presents it through a single interface. Using Machine Learning, Impact CRM extracts value from every interaction by analysing it for customer satisfaction. It protects your brand by flagging potential damage caused by poorly-performing team members and reduces compliance issues by highlighting possible infringements. Understand the mood of your customers, avoid compliance issues and protect your brand with ImpacTech. Every business knows the importance of exceptional customer satisfaction. It boosts the bottom line and improves retention. Then there’s the priceless benefit of word-of-mouth marketing that happy customers provide.

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Cebod Telecom

Cebod Telecom is one of the market leaders for affordable business VoIP plans. If you want a quality VoIP system on a budget, Cebod Telecom is the provider for you. They offer a state-of-the-art Pay-Per-Line business telephone model. Revolutionary as businesses will pay per line as opposed to pay-per-user VoIP systems, this service offers businesses access to Cebod Telecom’s already well-regarded quality telephone systems. In addition, the company also offers all-inclusive 50 plus premium IP PBX and dial tone features including music on hold, call forwarding, voicemail, e-Fax, and SMS through their VoIP services. Cebod Telecom offers both metered and unmetered phone plans suited for every type and size of business. High call quality, unlimited user extensions, and unlimited calling within USA and Canada are some of the benefits offered for each phone plan. They also offer free android and IOS phone Apps to manage the phone system and to communicate.

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CIS (Consumer Information Solutions)

Consumer Information Solutions

Experience an enterprise phone system for a small business price. Our VoIP phone system is ideal for any business of any size. With hosted PBX from CIS, you have access to Unlimited Calling anywhere in the Continental USA and Canada. Bundle your Phone System and Voice Services into one solution for one low rate. Enjoy the immediate advantage with one vendor for a complete telecom solution that will save you money and increase productivity. At CIS we speak with many SMB owners and we have learned that many businesses are thinking about call center solutions in the wrong way. For many, they are thinking a call center requires a large-scale operation with many agents answering customer service or support calls. That is the old way of thinking! Today especially because of Covid-19 restrictions, lockdowns, and the rise of the remote employee many businesses should be using call center solutions.

Starting Price: $20 per month

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Best SIP Trunk Providers for Windows

Compare the Top SIP Trunk Providers for Windows as of December 2025

What are SIP Trunk Providers for Windows?

RingCentral RingEX

Twilio

Squaretalk

Insider Telecom

T-Max Phone Systems

XCastLabs

Zadarma

Telnyx

Vonage Business

Voyced

Global Call Forwarding

8x8

Sherweb

Spoke Phone

OnSIP

2600Hz

OfficeConnect

CloudCall

Nextiva

IPFone

China Telecom

banter

peachcomm VoIP

Pulse

VoIPline Telecom

pascom ONE

Broadvoice

Impact Telecom

Cebod Telecom

CIS (Consumer Information Solutions)

Best SIP Trunk Providers for Windows

Compare the Top SIP Trunk Providers for Windows as of December 2025

What are SIP Trunk Providers for Windows?

RingCentral RingEX

Twilio

Squaretalk

Insider Telecom

T-Max Phone Systems

XCastLabs

Zadarma

Telnyx

Vonage Business

Voyced

Global Call Forwarding

8x8

Sherweb

Spoke Phone

OnSIP

2600Hz

OfficeConnect

CloudCall

Nextiva

IPFone

China Telecom

banter

peachcomm VoIP

Pulse

VoIPline Telecom

pascom ONE

Broadvoice

Impact Telecom

Cebod Telecom

CIS (Consumer Information Solutions)

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