VoIP Fundamentals

Top 10 best SIP trunking providers

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Effective communication is crucial for businesses to thrive in today’s competitive landscape. Session Initiation Protocol (SIP) trunking has emerged as a game-changing solution. It uses internet protocol (IP) networks to seamlessly transmit voice, video, and data communications. 

With a myriad of options available, choosing the right SIP trunking provider can be daunting. That’s why we’ve compiled a comprehensive list of the top 10 best SIP trunking providers. 

This article provides an overview of key features, reliability, scalability, customer support, and pricing models. It gives you the necessary information to make an informed decision to transform your business communication infrastructure with this information.


DIDWW is a leading provider of SIP trunking services that enable businesses to expand their voice communications globally. DIDWW’s high-capacity, global platform delivers quality SIP traffic, ensuring reliable audio quality, and excellent service. DIDWW SIP trunking services are designed to assist companies of all sizes in expanding their voice communications globally. The company adheres to local regulations and provides access to sophisticated capabilities.

The high-capacity, worldwide platform, configurable settings, and secure VoIP service of DIDWW make it an excellent choice for enterprises wishing to improve their communication capabilities. DIDWW offers outbound calling, free number porting, E911 calling, and exceptional voice quality, making it a complete PSTN replacement option. 

DIDWW SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Inbound and Outbound SIP trunking.

Local dialing is available in 44 countries.

Compliance with local regulations and access to advanced features.

Flexible settings and secure VoIP service for enhanced communication capabilities.

Competitive termination rates and premium voice quality. 

Easy service scalability via a self-service user panel.
Cancel any time.
Unlimited concurrent calls.

Large inventory of local, national, and toll-free virtual phone numbers in 80+ countries and 4700+ areas available instantly.

E911 calls for emergency situations.
Licensed operator in 28 countries worldwide.

Customizable SIP trunk settings for specific needs.

Free number porting.

ISO 27001 certified for effective data protection.
Integrations with Ribbon, Genesys and Zapier.

Compatible with most IP-PBXs and devices supporting SIP protocol.

Round-the-clock 24/7/365 in-house live support for superior customer service.

Long-code and alphanumeric A2P messaging services globally. 

99.998% network uptime with strategically placed POPs, direct peering, and optimized routing. 

No long-term contract.


Nextiva is a cloud-based VoIP provider that offers SIP trunking along with other features such as CRM, analytics, and chat. It offers unlimited nationwide calls, fast and free account setup, and a multi-level auto-attendant. Users can benefit from Nextiva’s services by streamlining their workflows, improving customer relationships, and gaining insights into their business performance. Users can also leverage Nextiva’s features such as call routing, call recording, voicemail to email, and more. Nextiva has a 99.999% uptime guarantee to improve user experiences and drive business results.

Nextiva SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Unlimited toll-free calling within the US and Canada with no per-minute charges or long-distance fees.

Features such as call routing, call recording, voicemail to email, and more.

Flexible pricing with no contract or setup fees.

Easy-to-use portal to manage your SIP trunks, phone numbers, provisioning, billing, and call data records.
Call Detail Record (CDR) of all calls made through the private branch exchange (PBX).

Integrations with Zendesk, ConnectWise, or MS Teams.

24/7 support via phone, FAQs, e-guides, instant chat, webinars, and video tutorials.

Fraud detection and mitigation measures to identify and prevent unusual or fraudulent call activity.
Automatic failover capabilities that redirect calls to alternative destinations or backup systems.

HIPAA-compliant virtual faxing makes it an ideal solution for healthcare professionals and organizations.

Phone number porting. Auto-attendant feature to automatically transfer incoming calls to various extensions.

HD-quality audio and video conferencing with no time limits.

Global Call Forwarding

Global Call Forwarding is a leading provider of international toll-free phone numbers, virtual phone numbers, local phone numbers, and outbound calling solutions for businesses of all sizes. It provides cutting-edge features, multiple pricing options, and round-the-clock customer service. Global Call Forwarding’s services can help users reach a wider audience, provide better customer service, and cut their communication costs.

Global Call Forwarding SIP trunking services also provide you with a number of benefits that can enhance your communication efficiency and effectiveness, such as:

Wide range of features to enhance communication efficiency.

Local, mobile, national, toll-free, and UIFN phone numbers from over 160 countries worldwide.

Low-cost voice termination to any destination worldwide using Global Call Forwarding’s Tier 1 network.

Dynamic local Caller ID for better answer rates and customer trust.
Call forwarding to any destination worldwide with international call forwarding.

Instant provisioning and quick activation without setup fees or commitments.

Premium voice quality and improved scalability.

Dedicated account managers and responsive customer service for better support.

Flexible services for local, global, and remote teams. 
Advanced communication and call management features like call forwarding, IVR, voicemail, and more.

International call forwarding to any destination worldwide.

Reduced communication costs without compromising quality.

No expensive hardware or maintenance.

Easily scalable services.


SIP.US is a provider of cloud SIP trunking services that offer on-demand, scalable, and reliable voice communications. It supports any SIP-compliant device, such as PBX systems and softphones. It offers low rates, unlimited channels, and an easy setup. By using SIP.US’s services, users can lower their phone bills, improve call quality, and streamline their communication setup. Additionally, users can benefit from features like caller ID, E911, fax support, and more.

SIP.US SIP trunking services also provide you with a number of benefits that can enhance your communication efficiency and effectiveness, such as:

Make and receive unlimited calls with no restrictions on duration or destination.

Pay only for what you use with no contract or setup fees.

SIP trunks, numbers, billing, and call data management via a self-service control panel.

SIP trunking integration with any IP-PBX or VoIP device that supports SIP protocol.

SIP trunk integration with Microsoft Teams for voice and collaboration on one platform.
No dialer surcharges and connections with carriers who welcome telemarketing traffic.

High-quality voice and reliability from Tier 1 upstream providers and redundant network infrastructure.

Secure voice communications with TLS/SRTP encryption and fraud prevention features.

Large inventory of local, toll-free, and international numbers in over 60 countries.

Free number porting to SIP.US.
24/7 technical support from SIP experts via phone, email, or chat.
Real-time call data records and detailed usage reports for analysis and billing purposes.

Customizable caller ID name and number for outbound calls to enhance your brand identity and customer service.

Call routing to multiple destinations based on time of day, day of the week, caller ID, or other criteria with advanced call routing features.

Emergency calling (E911) and caller name lookup (CNAM) services for SIP trunks for a low monthly fee.

Fusion Connect

Fusion Connect provides mission-critical reliability and PSTN replacement. It provides scalable SIP trunking services with limitless local and long-distance calling, caller ID, and E911 capabilities. Fusion Connect’s services can help users improve business efficiency, reliability, and security. Users can also access a cloud PBX, unified communications, a contact center, and other features.

Fusion Connect SIP trunking services also provide you with a number of benefits that can enhance your communication efficiency and effectiveness, such as:

High-quality and low-cost voice termination worldwide with Fusion Connect Tier 1 network.

Integration with various cloud applications and platforms, such as Oracle, Salesforce, Microsoft Dynamics, and more.

Fraud prevention with multi-factor security that requires SIP credentials and a specific IP address to initiate calls.

Unlimited local and long-distance calling plans in the US and Canada.
Easy service scalability according to business needs change.

Advanced calling features, such as caller ID, call forwarding, call waiting, voicemail, and more.

SIP trunking service management via a web-based portal that lets you view usage reports, configure settings, order numbers, and more.

Fusion Connect softphone app that lets you make and receive calls over the internet.
Regulatory compliant to ensure business continuity with emergency calling (E911) and number portability services.

24/7 technical support from Fusion Connect’s certified engineers via phone, email, or chat.

Integration with your existing PBX system or choose from Fusion Connect’s hosted PBX options.

Network reliability and redundancy that guarantee 99.999% uptime for voice communications.


RingCentral is a cloud-based communications platform that provides SIP telecommunications, team messaging, video conferencing, and contact center services. It also provides limitless storage, extensive reporting, and a 99.999% uptime guarantee. RingCentral’s services can help users improve cooperation, efficiency, and client satisfaction. RingCentral can also be integrated with popular programs such as Salesforce, Google Workspace, Microsoft 365, and others.

RingCentral SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Extensive coverage with full service in over 45 countries and inbound virtual numbers in 105+ countries.

Complete cloud phone system with unlimited calling within the UK and Ireland.

Features such as voicemail-to-email, call screening, call logs, call park, call flip, and more.

Business SMS and MMS messages from your business phone number using your computer or mobile device.

Team collaboration using group chat, file sharing, task management, and more.
Fax services using any device without a fax machine or a dedicated line.

Call management with features such as auto-receptionist, call queues, extensions, hunt groups, intercom, paging, shared lines, and more.

Integrations with apps such as Google Workspace, Microsoft 365, Salesforce, Zendesk, Zoho CRM, and more.

HD video meetings with screen sharing and chat from any device.

Automated phone menu with multi-level IVR. 
Audio conferences for up to 1,000 people.

One-way announcements using a RingCentral phone with the paging feature.

Instant notifications of your voicemails via email or RingCentral mobile and desktop apps.

Ongoing call transfer between your mobile phone, softphone, or desk phone.

Live reports to track your overall performance with the dashboard


Vonage is a cloud-based communications provider that offers SIP trunking along with other features such as SMS, video, and fax. It offers automatic location-based routing (ALBR), multi-codec support, and user query information. Users can benefit from Vonage’s services by optimizing their network performance, reducing bandwidth consumption, and enhancing their user experience. Users can also use Vonage’s features such as call blocking, call screening, call parking, and more.

Vonage SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Elastic scalability with unlimited capacity and quick cloud connections.

Global reach to over 225 countries and 1,600+ networks.

Secure and reliable with TLS encryption. 

24/7 support and monitoring to troubleshoot any issues.

Location-based routing for efficient call handling.
Dashboard analytics for network and origin details.

Multi-level auto-attendant directs callers to the right department.

Create secondary sub-accounts for organizing multiple services.

Multi-codec support for high-quality video streaming.

Detailed call reporting and activity for your account.
Phone number portability.

Programmable voice features to enhance customer experience and business efficiency.

Instant connectivity to our network without lengthy carrier contracts.

Voice Inspector for call-quality measurements, call debugging, and new voice app testing.


Twilio is a cloud-based communications platform that offers SIP trunking along with other features such as global text messaging, interactive voice response (IVR), and video recording. It offers pay-as-you-go pricing, flexible APIs, and a 99.95% uptime guarantee. Twilio’s services may help users build personalized communication solutions, scale businesses internationally, and innovate with cutting-edge technologies. Twilio services like voice recognition, sentiment analysis, transcription, and more are also available to users.

Twilio SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Seamless scalability with unlimited capacity and elastic scaling.

Pay-as-you-go pricing with no contract fees.

Toll-free, mobile, local, and national in 100+ countries.

Call performance monitoring with Twilio Voice Insights.

Phone number porting
Call control features for holding and transferring calls.

Real-time trigger alerts for suspicious activity warnings.

Third-party integrations with platforms such as Zoom, Hubspot, Intercom, etc.

Encrypt media with Secure Real-time Transport Protocol (SRTP).

Voice conference calls for up to 250 participants.
Voice and video call audio transcription.

On-demand self-service trunk provisioning and innovative cloud features.

Custom discounts on your most important routes.

Robust global disaster recovery features.

SMS and MMS‑enabled numbers


Net2phone is a global SIP trunk provider that offers unlimited business calling to over 40 international locations as well as premium 24/7 customer support from their VoIP experts. Net2phone SIP trunking services link your existing PBX (Private Branch Exchange) system to the internet through a SIP trunk, which functions as a virtual phone line. This way, you may benefit from cloud-based PBX phone system capabilities without changing any of your existing equipment.

Net2phone SIP trunking services also provide you with a number of features that can improve your communication efficiency and effectiveness, such as:

Unlimited business calls nationwide and internationally to over 40 countries.

Enhanced quality of service (QoS) for crystal-clear voice communications.

Virtual phone numbers (DIDs) from over 50 countries and 300 cities.

Global data centers in 9 countries.
Premium 24/7 customer support from VoIP experts.

Scalable solutions for growing businesses.

Reliable and advanced network infrastructure.

Simplified management and administration of communication systems.

A host of enterprise-grade features.
Hybrid SIP and Hosted environment support.

Seamless integration with top industry providers.

SMS and MMS for business messaging.

Business phone app available on IOS and Android.

Net2phone Huddle video conferencing platform.

Interconnections with 1,000+ carriers.


Telnyx is a global provider of elastic SIP trunking services that offer instant, unlimited global scale and control over your voice communications. Telnyx is a carrier in 30+ countries with millions of local numbers that can be easily accessed through their self-service portal. IP trunking services from Telnyx enable you to connect your existing PBX system or any other VoIP device to the internet through a SIP trunk, which acts as a virtual phone line. Instead of traditional phone lines, you may use your internet bandwidth to make and receive audio and video conversations through the internet protocol (IP).

Telnyx SIP trunking services also provide you with a number of features that can enhance your communication efficiency and effectiveness, such as:

Elastic SIP trunking services.

Instant, unlimited global scale, and control over voice communications.

Connect existing PBX or VoIP devices to the internet via a virtual phone line.

Use internet bandwidth for voice and video calls over IP.

Add or remove SIP trunks easily and quickly.
Custom voice routing for quality, cost, or specialized traffic.

Compliance with Kari’s Law and the Ray Baum Act for emergency calls.

Troubleshooting of calls with built-in debugging tools.

Custom alerts for account balances and suspicious activity.

Secure communications with private, multi-cloud networks.
24/7 award-winning support, so your questions never have to wait until Monday.

15 multi-cloud points of presence.

Easily plug and play with your existing communications platform.

Local numbers in 140+ countries.

Phone number porting.


Choosing the right SIP trunking provider is crucial for businesses seeking reliable and cost-effective communication solutions. We hope this article on the top 10 best SIP trunking providers has shed light on the industry’s leading players and their offerings. 

Each provider brings unique advantages, such as reliability, scalability, advanced features, competitive pricing, and exceptional customer support. Hopefully, this overview has equipped you with valuable insights and guidance to make an informed decision. By selecting a trusted SIP trunking provider, you can enhance your business communication, streamline operations, and achieve long-term success.

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