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.

2,920 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.

1,291 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.

195 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

Business Phone system without heavy hardware and wiring. Zadarma offers VoIP, Cloud PBX, CRM, speech analytics, call tracking, eSIM, website widgets, integration with top CRM systems, and much more. Take advantage of our free Cloud PBX offer to create a versatile business phone system in a matter of minutes. The PBX supports Interactive Voice Response (IVR), Conditional and Unconditional Call Forwarding, Call recording and statistics, speech analytics, and many other powerful features. With an intuitive software wizard and our clear instructions, even the most non-technical individuals can easily set up the system. Establish your local or international presence with virtual phone numbers from 100 countries around the world starting from just $2 a month.

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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EnableX Communications APIs

vCloudx

EnableX makes integrating real-time communications into applications and workflows a lot easier. Designed and developed for Service Providers, Systems Integrators, and Developers, it provides a robust, scalable and secure communications platform without the complexity of building and maintaining the network infrastructure. By simply leveraging on EnableX comprehensive sets of programmable APIs and SDKs, developers can rapidly customize and embed all or part of the communication functions – voice, video, SMS and chat – right into existing applications, workflows and systems. Together with the Virtual Number services and advanced features such as AI and NLP, businesses can reach customers globally with an outstanding communication experience.

6 Ratings

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VND PBX

VNDSOLUTIONS LIMITED

Our cloud-based hosted PBX gives you phone numbers so you can grow your business. Connect your SIP device or your current phone to our cloud PBX. Build complex calling dial-plans and enjoy features via our PBX portal. No contract with us and SAVE 70% from your current service provider. Use our business grade Hosted cloud PBX or SIP trunk service, tell us your needs and we will recommend you. Our VoIP solutions are designed specifically for businesses who want hassle free, reliable and extendable solution with no time. You enhance the features of your existing product by using our powerful Telephony API’s. Both Hosted PBX and SIP Trunking support API calls. Our robust & powerful API’s are very easy to integrate. We monitor our support lines 24/7 so give us a call or talk to our support team via live chat on our web (https://vndpbx.com). New Zealand: 0 9 8896552 (Auckland) U.S.A: +1 929 4809552 (New York)

3 Ratings

Starting Price: $11 per month

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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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Monster VoIP

Monster VoIP was established to distribute superior voice quality and maximized uptime to customers from here in L.A. to New York to Washington, D.C. to Houston to Dallas to Chicago and beyond, while delivering unparalleled service and customer satisfaction. We started by setting up data centers in Las Vegas, New York, Dallas, and Minnesota to ensure geo-redundancy, with all endpoints multi-registered at all four facilities. (This is just a fancy way of saying that multiple locations means you can expect amazing voice quality and unparalleled business phone uptime.) We then made sure to offer a complete suite of communication tools in one platform. This means you and your team only have to learn our easy-to-use user interface for all of your communication efforts. To make good on our customer satisfaction promise, we then decided to provide personalized setup and ongoing 24/7/365 support to every business VoIP customer that walks through our (virtual) doors.

1 Rating

Starting Price: $27 /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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VoIP Much

VoIP Much Phone Company

We are the VoIP Much Phone Company Inc. VoIP Much (Your Internet Phone Company) is a privately held Internet phone company, providing phone services over your broadband internet connection. This is also known as VoIP (Voice Over Internet Protocol). With headquarters located in Toronto, Ontario, Canada, VoIP Much provides phone services primarily to home and business customers across Canada and the United States. Our business services however, including conferencing and IVR (Interactive Voice Response), are provided globally. Our principle business owners have been involved in both IT (Information Technology) and Telecom for over 20 years each, bringing with both a great deal of experience and expertise to VoIP Much. Utilizing our own infrastructure, as well as peering with several carriers around the globe, VoIP Much can ensure quality phone services for your home, small or enterprise business.

2 Ratings

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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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Ajoxi

Ajoxi is a leading provider of wholesale VoIP termination services, dedicated to delivering exceptional connectivity and reliability. Utilizing state-of-the-art equipment and advanced routing technologies, Ajoxi ensures that every call is of the highest quality. Their commitment to excellence is backed by a team of experienced technicians who monitor the network around the clock, 24/7. This proactive approach allows them to swiftly identify and resolve any potential issues, minimizing downtime and ensuring seamless communication for their clients. Whether it's for high-volume call centers or international communication needs, Ajoxi's robust infrastructure is designed to handle the demands of today's fast-paced digital world. Their focus on quality, reliability, and customer satisfaction makes them a trusted partner in the VoIP industry. With Ajoxi, you can expect nothing less than top-tier service and consistent performance that supports your business communication needs.

Starting Price: $ 3.00

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Fusion Connect

Connect your entire business with one call. Fusion Connect is your Managed Services Provider tailoring business internet solutions for your SD-WAN, business VoIP, unified communications (UCaaS), internet access, secure networking, and more. Fusion Connect's Business VoIP also features Internet-based faxing, SIP trunking, softphone, and auto attendant functions. Compatible with Windows and Mac, as well as device independent.

Starting Price: $19.95/month/user

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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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4Voice

4Voice’s telecom experts analyze all facets of your voice communication needs to deliver a customized solution that fits the budget, bandwidth and priorities of your business. White glove service and one-on-one training ensure zero down-time and painless deployment, so your business can focus on the work that really matters. Whether calling from the home office, branches or working remotely, your voice transmissions are managed from a secure location, delivering cloud service that is fast, clear and reliable. 4Voice’s cloud phone services for business can reduce your phone bill by as much as 50%. With 4Voice, you use a single infrastructure for both voice and data (Internet), and get local, domestic, long distance, toll-free, and eFax services—all for one low price.

Starting Price: $10 per month

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Nextiva

Nextiva is a feature-rich cloud-based unified communications service offered by Nextiva. Offering businesses more ways to communicate than ever, Nextiva helps to empower today's modern businesses. Whether on the desk or on the road, teams subscribed to Nextiva can enjoy seamless mobility, clear communication, and a scalable service. All conversations in one place with phone, SMS, video, and email together with customer experience and productivity tools. Reduce app fatigue by communicating with customers and teams from one tool. Get rid of productivity loss from not having the information you need, when you need it. Communicate with customers however they come to you and track their conversations and feedback in a single view. Learn more about our favorite customer engagement tools. Understand how your customers feel through every interaction.

Starting Price: $19.95 per month

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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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BCM One

BCM One provides comprehensive, managed technology solutions to help businesses streamline their network to make communications, collaboration and connectivity simple and cost-effective. Business networks are complex by nature. Add in multiple locations and vendors, different ways of working, and evolving technology needs and the infrastructure can quickly get out of control. Without proper transparency, oversight, and expertise, companies end up relying on insufficient legacy systems, building out unsustainable networks, and overspending on services they don’t need. BCM One can help you right-fit your technology to meet your current network needs and scale as you grow. Your network may be complex, but it doesn’t have to be unmanageable. Let BCM One show you how. BCM One will optimize your network to meet all of your collaboration and communications needs now and as your business grows.

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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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Best SIP Trunk Providers for Windows

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

What are SIP Trunk Providers for Windows?

RingCentral RingEX

Twilio

Squaretalk

Insider Telecom

T-Max Phone Systems

XCastLabs

Zadarma

Telnyx

EnableX Communications APIs

VND PBX

Vonage Business

Voyced

Global Call Forwarding

Monster VoIP

8x8

Sherweb

VoIP Much

Spoke Phone

OnSIP

2600Hz

Ajoxi

Fusion Connect

OfficeConnect

CloudCall

4Voice

Nextiva

China Telecom

BCM One

banter

peachcomm VoIP

Best SIP Trunk Providers for Windows

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

What are SIP Trunk Providers for Windows?

RingCentral RingEX

Twilio

Squaretalk

Insider Telecom

T-Max Phone Systems

XCastLabs

Zadarma

Telnyx

EnableX Communications APIs

VND PBX

Vonage Business

Voyced

Global Call Forwarding

Monster VoIP

8x8

Sherweb

VoIP Much

Spoke Phone

OnSIP

2600Hz

Ajoxi

Fusion Connect

OfficeConnect

CloudCall

4Voice

Nextiva

China Telecom

BCM One

banter

peachcomm VoIP

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