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Best USA SIP Trunk Providers for Business



USA SIP Trunk Providers

In this digital era, reliable and efficient communication is the backbone of any successful business. However, using traditional phone lines is more expensive and inflexible now. 

This is where SIP trunking comes out as a 😃 solution. SIP trunking offers you a cost-effective solution and a wide range of feature-rich solutions for small to medium-sized businesses. But due to multiple SIP trunk providers out there, choosing the right one can challenging.

This guide will suggest the top USA SIP trunk providers in terms of features and pricing. Moreover, you will also learn SIP trunk benefits and things to consider before choosing the provider. 


  • Twilio, 8×8, and Grasshopper rank among the top choices for SIP trunk providers in the USA, favored by numerous businesses.
  • SIP trunking allows businesses to utilize the Internet instead of depending on traditional phone lines for making and receiving calls.
  • SIP trunk offers its customers cost-effective solutions, feature-rich, unified communication, and much more.
  • Before choosing a SIP trunk provider consider things such as features, pricing, scalability, and customer support.

What is SIP trunking?

SIP or Session Initiation Protocol trunking is a digital method of communication that allows businesses to make and receive phone calls over the Internet rather than a traditional phone line. SIP trunk helps you to access multi-communication channels such as instant messaging, video conferencing, and SMS. 

what is sip trunking

In addition, SIP trunking facilitates features such as scalability, call routing and number porting. It is also known as a digital version of phone lines. SIP trunking offers you a clear call quality compared to traditional phone lines, especially on dependable internet connections. 

What are the benefits of SIP trunking?

These are some benefits of using SIP trunking for businesses.

  • Cost-effective: SIP trunking is much cheaper than traditional phone lines, especially for those businesses with high call volume. Typically payment is made per channel instead of per line, and there are no additional long-distance charges within the provider’s network which makes it a cost-effective solution.
  • Scalability: The primary advantage for businesses of SIP trunking is that it can easily scale as your business grows. For instance, you can effortlessly add or remove channels. You no longer need to install or remove infrastructure like traditional phone lines. 
  • Feature-rich: SIP trunking offers its customers a wide range of features compared to other traditional phone lines. The features include voicemail to email, call recording, call analytics, video conferencing, and call forwarding. It’s also possible to send multimedia messages. 
  • Unified communications: With SIP trunking, you can integrate with other communications tools like video conferencing, email, and instant messaging. It enables efficient and adaptable communication strategies customized to various business requirements.
  • Potentially better call quality: SIP trunking has the capability to utilize an internet connection for voice transmission. By having dependable and proper Quality of Service (QoS) settings, SIP trunking can potentially offer you a clearer call quality compared to other traditional phone lines.
👀 Take a look at: What Is SIP Phone? Everything You Need to Know

10 Best USA SIP Trunk Providers in 2024

Choosing the best USA SIP trunk provider depends on your unique requirements. By thoroughly evaluating your requirements, you can discover the best SIP trunk provider for your business communications. 

These are the top 10 best USA Sip Trunk providers:

1. Twilio 

Twilio is the top USA SIP trunk provider, recognized for its impressive scalability. It is renowned as one of the best SIP trunk providers, and Twilio offers its customers cost-effective global coverage and adaptability. Twilio permits effortless integration of communication functionalities into your current applications or workflow. 

Twilio as one of the best USA Sip Trunk providers

Twilio pricing structure offers flexibility, featuring pay-per-minute rates for individual channels and a monthly subscription plan for multiple channels. Twilio offers unlimited capacity and allows global deployment within minutes via user-friendly self-service features.

⚡ Features

  • Call control and recording
  • Email Integration
  • Robust security:
  • Supernetwork and private connections


  • Scalability 
  • Cost-effectiveness
  • Global reach
  • Improved call quality


  • Pricing structure
  • Learning curve
  • Limited features 

💰 Pricing (Pay-as-you-go Phone Number pricing)

Local Numbers$1.15/month
Toll-Free Numbers$2.15/month

2. 8×8 

8×8 is another SIP trunking provider that offers a fixed monthly fee that includes unlimited calling to more than 40 countries. Moreover, 8×8 also offers a wide range of advanced features, such as collaboration tools, video conferencing, and business app integration. 

8x8 as sip trunk service provider

8×8 is renowned as a cost-effective solution and a multi-communication service to its customers. It delivers a completely integrated communication platform specifically designed for small to medium-sized businesses.


  • Reliability and security
  • Business Integration
  • Multimedia communication
  • Call management 


  • Strong reliability and security
  • Reduced costs for long-distance and international calls
  • Minimal upfront costs and quick ROI 
  • Improved call management
  • Scalability


  • Limited customization
  • Pricing complexity
  • Limited international reach

💰 Pricing

Contact the 8×8 customer service team for pricing.

3. Grasshopper

Grasshopper is renowned as one of the best choices for small businesses that require SIP trunking. Grasshopper offers its customers a virtual telephone system that includes advanced features such as voicemail transcription, auto attendants, and call forwarding. 

Grasshopper as a enterprise sip trunk providers

Grasshopper’s virtual telephones offer you both affordability and flexibility. It gives you the flexibility to connect with your global customers and clients over the Internet with minimal service outages or voice disruptions.


  • Automated greeting
  • Call Forwarding and routing
  • Auto attendant
  • Voicemail transcription


  • Simplicity and ease of use
  • Call-effectiveness
  • Essential call management features
  • Mobility and flexibility


  • Limited scalability
  • Lack of advanced features
  • Integration restrictions

💰 Pricing

Small Business$89/month

4. Aircall

Aircall offers SIP trunking services that enable companies to serve multiple local phone numbers without needing a physical presence in those locations. In addition, it also integrate with popular CRM and helpdesk tools, allows you to oversee all customer engagement from a single platform.

affordable USA sip trunk provider

Some key features of Aircall’s SIP trunking service include toll-free numbers, call routing, and customized schedules for business hours, enhancing call management and customer interactions.


  • Interactive voice response
  • Call conferencing
  • Call tagging
  • Video chatting and conferencing


  • Cloud-based and user-friendly
  • Scalable
  • Integration capabilities
  • Available on mobile and desktop apps


  • Potentially higher costs
  • Limited customization
  • Learning curve

💰 Pricing

Essentials$40/3 license/month
Aircall AI Add-On$9/license/month
Analytics+ Add-On$15/license/month

5. CloudTalk

CloudTalk allows its customers to leverage SIP trunking functionality within their platform. It directly focuses on cloud-based phone systems with features like call routing, call recording, voicemail transcription, and auto attendants. With CloudTalk, it is easy for agents and managers to learn and navigate.


CloudTalk’s SIP trunking services also offer for your businesses a reliable and flexible communication solution. If you are in search of a trustworthy and flexible communication partner you can discover excellent deals in CloudTalk’s offerings.


  • Intelligent call routing
  • Callback functionality
  • Automated outbound Caller ID
  • Unified communication hub


  • Ease of use and reliability
  • Strong Integration
  • Scalability and flexibility
  • Cost-effectiveness


  • Contract requirements
  • Limited reporting features
  • Integration complexity

💰 Pricing


6. Vonage

Vonage is a leading contender in the US SIP trunking market, offering a compelling combination of features, reliability, and scalability. It prioritizes clear call quality with a robust network infrastructure, ensuring seamless communication across the country. 


In addition, Vonage allows you to scale your phone line usage up or down based on demand. This completely eliminates the need for pre-provisioning and ensures you only pay for what you use. Their user-friendly dashboard simplifies call management and provides valuable insights. 


  • Automatic location-cased routing
  • PBX compatibility
  • Programmable SIP
  • Multi-code support


  • Effortless scalability
  • Cost-effectiveness
  • Unmatched reliability and high call quality
  • Global reach and local presence


  • Limited features
  • Contract requirement
  • Customer service concerns

💰 Pricing

Contact Vonage’s customer service team for pricing.

7. Nextiva

Nextiva is the best option in the US SIP trunking market,  offering a feature-packed solution for businesses seeking a reliable and comprehensive option. It mainly prioritizes compatibility with a wide range of PBX systems, ensuring a smooth integration with your existing setup. 


Nextiva boasts high call quality and robust infrastructure for seamless nationwide coverage. It offers various features, like E911 compliance and efficient number porting, to streamline your transition.


  • Seamless PBX Integration
  • Voicemail transcription
  • Number porting
  • E911 functionality


  • Cost savings
  • Scalability
  • Cloud-based flexibility
  • Improved reliability


  • Limited customization
  • Focus on bundled packages
  • More complex setup

💰 Pricing


8. RingCentral

RingCentral is one of the best SIP trunk providers for small and medium-sized businesses and is also known for its ease of use. Their service is designed to scale with your business, accommodating growing call volumes and geographically dispersed teams.


Moreover, RingCentral offers you a transparent pricing structure and avoids hidden fees. Also, customer support is readily available, with a US-based team equipped to address your specific needs. 


  • Automatic call distribution 
  • Call recording and analytics
  • Integration with business tools
  • Auto attendants


  • Reliable Infrastructure and security
  • Improved collaborations
  • Comprehensive feature set
  • Scalability and flexibility


  • Limited features control for admins
  • Customer support concerns
  • Integration complexity

💰 Pricing


9. Dialpad

Dialpad isn’t exclusively a SIP trunking provider, but it offers you a comprehensive cloud-based VoIP solution that includes SIP trunking functionality.  This means Dialpad handles all the technical aspects of connecting your existing phone system to the internet for making and receiving calls. 


With Dialpad, you can always be assured that you will have exceptional call quality. It also has a user-friendly interface that your administrators and call agents easily understand and use. 


  • Visual voicemail
  • Caller ID
  • Business text messaging
  • Virtual receptionist


  • Cost-effectiveness
  • User-friendly Interface
  • AI-powered features
  • Unlimited calling and texting


  • Voice transcription is very poor 
  • Potential Cost for High Volume
  • Integration limitations

💰 Pricing

Small Business$15/month
EnterpriseCustomized plan

10. DialerHQ

DialerHQ is an SIP trunking provider, that offers its customers secure, and cost-effective solutions. This allows you to leverage SIP trunking functionality within their call center software. It is also known as a cost-effective solution and improves customer engagement.


DialerHQ provides you with features such as automatic dialing and lead management, which can help call center agents work more efficiently.


  • CRM integration:
  • Advanced call routing
  • Integration with business tools
  • Auto-dialer


  • Offers seamless call forwarding
  • Excellent call quality
  • User-friendly interface and robust features
  • Scalability and security


  • Security concern
  • Initial setup and configuration of DialerHQ can be complex
  • Connectivity problems and a lack of new features persist

💰 Pricing

Contact DialerHQ sales team for pricing.

👀 Take a look at: PRI Vs SIP: Differences & Which to Choose for Your Business

Things to consider before choosing USA SIP trunk provider

Just randomly choosing a SIP trunk provider isn’t efficient for your business. Therefore, considering things like features and price is really important. It helps you to choose a provider that truly aligns with your business needs and requirements. 

Here are the major things to consider before choosing an SIP trunk provider in the USA:


First and foremost, explore the various SIP trunk providers and the features they offer. The essential features of the SIP trunk include call forwarding, voicemail, video conferencing, and call analytics. Analyze whether they provide all of these features or not. Besides that, look out whether the provider has features that your business needs. 


After exploring all of the provider’s features, look at the pricing. Then, carefully choose one provider that perfectly fits within your budget. But remember that the provider should offer all the features that you need in your business. 


Eventually, your business will grow in the future. Therefore, choose a provider that can scale with your business. Consider their infrastructure capacity to accommodate an increase in call volume as your company grows. For businesses operating across multiple US locations, ensure nationwide coverage and reliable call routing for all regions.

Customer support 

Trustworthy customer support is very important for any business communication service. Ensure that your chosen SIP trunk provider offers you 24/7 support via multiple channels like email, live chat, and phone. Look for a US-based support team with in-depth knowledge of SIP trunking and the specific needs of US businesses for effective troubleshooting.

Contract terms

Examine the contract length and termination fees. Some USA SIP trunk providers offer contracts for maximum flexibility, while other SIP trunks require more extended commitments with possible early termination penalties.


While there are so many USA SIP trunk providers, a perfect contender is ready for your unique business requirements. Consider factors like customer service, cost, features, scalability, and network reliability to make an informed decision. Also explore additional considerations such as data privacy, integration with current systems, and specialized industry knowledge.

Remember, exploring different providers and their offerings is the right way to discover the best USA SIP trunk provider that will evolve your communication partner’s success.


Do I need a special phone system for SIP trunking?

No, you don’t necessarily need a special phone system for SIP trunking. SIP trunking works via the internet and needs an IP-based private branch exchange (PBX) and a Session Border Controller to handle both internal and external calls.

Who sells SIP trunks?

SIP trunks are sold by a variety of companies, ranging from established telecom providers like Verizon and AT&T to business VoIP specialists like Nextiva and Avoxi. These specialists focus entirely on providing SIP trunking and other internet-based phone solutions, allowing them to cater specifically to the needs of businesses looking to make the switch from traditional phone lines.

How do I choose a SIP provider?

Focus on finding a reputable SIP provider that offers a plan that aligns with your budget and call needs. Research different providers, compare features and international rates, and choose the one that best complements your business communication goals.

How many calls can 1 SIP trunk handle?

Each SIP trunk handles one call at a time, and you can purchase more channels as your business needs grow. However, the unlimited limit on call volume is your internet bandwidth, as each call uses bandwidth and too many calls can lead to quality issues.

What is the international rate for SIP trunk?

SIP trunking itself doesn’t have a universal international rate. Instead, the cost of international calls depends on the provider you choose and the specific destination country. However, on average, SIP trunk pricing can range from $15 to $40 per channel.

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Dinesh Silwal

Dinesh Silwal is the Co-Founder and Co-CEO of KrispCall. For the past few years, he has been advancing and innovating in the cloud telephony industry, using AI to enhance and improve telephony solutions, and driving KrispCall to the forefront of the field.

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