8 Best SIP Trunk Providers (2024 Reviews)

Businesses use SIP (Session Initiation Protocol) trunks to connect the traditional phone network to VoIP phone systems. SIP trunks offer disaster recovery, call data records, toll fraud prevention, and more.

We researched over 25 tools to help you find the right SIP phone service to meet your company’s needs. The selection criteria were based on call quality, value for money, customer support, and security. Here is an exclusive list of 8 top SIP trunk providers with a good reputation on the market.
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Top Pick
Nextiva

Nextiva system provides redundant SIP servers for low-latency connectivity. Nextiva SIP Trunking solution has a rapid setup that you can deploy without coding. It integrates with the existing PBX system and connects it directly to the cloud.

Visit Nextiva

Best SIP Trunking Providers: Cheap Options

#1 Best Overall

Nextiva

Nextiva

✔️ Free Trial: 7
Days

✔️ Countries Supported: USA, UK, Canada etc.

✔️ Per-minute SIP Rates: $0.008

✔️ Deployment: Hosted PBX

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#2 Top Pick

RingCentral

RingCentral

✔️ Free Trial: 14 Days

✔️ Countries Supported: USA, Canada, France etc.

✔️ Per-minute SIP Rates: $0.039

✔️ Deployment: Cloud PBX

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Vonage

Vonage

✔️ Free Trial: 14 Days

✔️ Countries Supported: USA, Canada, Mexico etc.

✔️ Per-minute SIP Rates: $0.0041 – $0.2575

✔️ Deployment: Cloud PBX

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Twilio

Twilio

✔️ Free Trial: 45 Days

✔️ Countries Supported: Finland, Australia, UK etc.

✔️ Per-minute SIP Rates: $0.0034 – 0.0130

✔️ Deployment: Hosted PBX

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Expert Advice:

Keep an open mind when selecting a SIP trunk provider to make the right choice. The wrong SIP provider may not offer the potential to scale or give an instant return on investment. That’s why it is essential to select the right tool, as it increases productivity and consolidates your communication system.

1) Nextiva

Best Affordable SIP trunk overall

Nextiva system provides redundant SIP servers for low-latency connectivity. It integrates with the existing PBX system and connects it directly to the cloud. Nextiva SIP trunks convert traditional phone systems to VoIP solutions, making it easy to place multiple calls.

The plans include all-inclusive pricing with metered and unmetered SIP Trunking. Nextiva has a 99.999% uptime guarantee to improve user experiences and drive business results.

#1 Top Pick
Nextiva
5.0

Supported Countries: Puerto Rico, United Kingdom, USA, and Canada.

Per-minute SIP Rates: $0.008

Numbers: Direct-dial, Toll-free

Free Trial: 7 Days Free Trial

Visit Nextiva

Features:

  • You can access HD-quality audio and video conferencing with no time limits.
  • Send files and share screens within the virtual rooms.
  • You can receive, open, and listen to voicemail messages from your email.
  • Nextiva SIP Trunking solution has a rapid setup that you can deploy without coding.
  • The fraud mitigation detects any fraud or unusual call activity.
  • Configure call routing based on business hours or phone numbers.
  • Auto-attendant transfers incoming calls to various extensions.
  • It places inbound callers into queues to minimize calling wait times.
  • Real-time voice analytics analyses customer calls to gain actionable insights.
  • Get a Call Detail Record (CDR) of all the calls made through the private branch exchange (PBX).
  • Nextiva has automatic failover that directs calls to another destination when offline.
  • Third-party integrations include Zendesk, Zoho, Hubspot, SugarCRM, Salesforce, etc.
  • Customer support includes phone, FAQs, e-guides, instant chat, webinars, and video tutorials.
  • Citizens of Puerto Rico, the United Kingdom, the USA, and Canada can get Nextiva SIP Trunk.

Pros

  • It allows users to port their existing phone numbers.
  • You can get a free business phone number.
  • Unlimited toll-free calling across North America.
  • You get affordable VoIP desk phones.

Cons

  • It does not track the location of emergency calls.
  • Nextiva SIP does not work with low network bandwidth.

Key Specs:

Per-minute SIP Rates: $0.008
Numbers: Direct-dial numbers (DIDs), Toll-free
Pricing: Plans start at $18.95 a month. 30 Days Money Back Guarantee.
Free Trial: Yes – 7 Days
Setup Fee: Free
Port Fee: None

Visit Nextiva >>

7-Days Free Trial


2) RingCentral

Best for Network consolidation

RingCentral is a cloud business communications solution that offers virtual PBX (Private Branch exchange). It uses IP protocol to connect on-premises systems to the public switched telephone network (PSTN). The platform facilitates communication between customers and agents across several channels. These channels include voice calling, social media messaging, email, and live chat.

Its plans offer unlimited calls and messaging and provide an option to add desk phones. RingCentral streamlines fax, intercom calling, and online meeting functionalities into one unified interface. Furthermore, you can place and manage high volumes of calls while providing more personalized customer service.

#2
RingCentral
4.9

Supported Countries: Denmark, USA, Canada, Belgium, France, and 30+ Countries

Per-minute SIP Rates: $0.039

Numbers: Local, Toll-free, Vanity, International

Free Trial: 14 Days Free Trial

Visit RingCentral

Features:

  • Receive instant voicemail notifications via email or RingCentral mobile and desktop apps.
  • Get connected in an audio conference with up to 1,000 people.
  • Advertise to callers or keep them entertained with music on hold and messages.
  • The paging feature allows you to make one-way announcements using a RingCentral phone.
  • Intercom calling enables hands-free peer-to-peer conversations.
  • It has a multi-level IVR to direct callers using an automated phone menu.
  • RingCentral lets you send business SMS and MMS from your business phone number.
  • Users can send files and share their screens during meeting presentations.
  • Create professional phone greetings to build credibility and establish your brand.
  • Third-party integrations include G-Suite, Salesforce, Microsoft Teams, Velvetech, and Theta Lake.
  • Customer support provides chat, FAQs, e-guides, webinars, video tutorials, phone, and email.
  • Citizens of Denmark, USA, Canada, Belgium, France, and 30+ Countries.

Pros

  • You can transfer an ongoing call between your mobile phone, softphone, or desk phone.
  • It protects communications data with enterprise-grade security.
  • The dashboard provides live reports to track overall performance.
  • RingCentral keeps a calling log record of all your inbound and outbound voice calls.

Cons

  • It takes up to 24 hours to generate reports.
  • RingCentral prompts users to download the app before joining a meeting.

Key Specs:

Per-minute SIP Rates: $0.039
Numbers: Local, Toll-free, Vanity, International
Pricing: Plans start at $19.99 a month. 33% Discount on Yearly Payment.
Free Trial: Yes – 14 Days
Setup Fee: Free
Port Fee: None

Visit RingCentral >>

14-Days Free Trial


3) Vonage

Best for Per-second billing

Vonage is a cloud-based communications solution suitable for small and midsize businesses. It is one of the best SIP trunking providers focusing on user management and scalability. Moreover, it offers customizable programming features like WebSocket connectivity and 30-participant conference bridges.

Managers can use Vonage portals to view billing information and adjust employee dashboard visibility. They can also review call recordings and set up dialing restrictions. You will also get advanced features like group calls, visual voicemail, and interactive voice response (IVR).

#3
Vonage
4.9

Supported Countries: Mexico, Poland, USA, Canada, New Zealand, and 60+ countries.

Per-minute SIP Rates: $0.0041 – $0.2575

Numbers: Local, Toll-free

Free Trial: 14 Days Free Trial

Visit Vonage

Features:

  • Location-based routing directs calls to the closest extension or department.
  • Dashboard analytics details your client’s cellular network and country of origin.
  • It offers three-way calling conferencing for you and two other participants.
  • The text-to-speech feature converts written text into audio.
  • Multi-level auto-attendant handles inbound calls and directs callers to the correct department.
  • You can create secondary subaccounts to help you organize multiple services or applications.
  • Vonage offers multi-codec support for high-quality video streaming.
  • Users can port and continue using their existing local numbers.
  • Get call details and report activity for your Vonage account.
  • You can use IP (Internet Protocol) whitelisting to make password authentication.
  • It can simultaneously record different sound sources to multiple tracks.
  • Customer support includes social media platforms, video tutorials, FAQs, email, and instant chat.
  • Citizens of Mexico, Poland, the USA, Canada, New Zealand, and 60+ countries can access Vonage.

Pros

  • It ensures privacy and data integrity using Transport Layer Security (TLS).
  • You can get multiple phone numbers.
  • The paging group can broadcast a message to up to 500 extensions.
  • Use call flip to transfer an ongoing call from one device to another.

Cons

  • It takes a long time to report on customer configurations.
  • The call quality is entirely dependent on the broadband speed.

Key Specs:

Per-minute SIP Rates: $0.0041 – $0.2575
Numbers: Virtual and Toll-free
Pricing: Plans starting at $19.99 a month.
Free Trial: Yes – 14 days
Setup Fee: Free
Port Fee: No

Visit Vonage >>

14-Days Free Trial


4) Twilio

Best for Unlimited capacity SIP Trunk

Twilio is a cloud-based communication solution that helps you engage customers through voice, video, SMS, email, and more. It enables you to deploy SIP trunks on VoIP infrastructure to cut communication costs.

The company offers unlimited capacity and flexible, pay-as-you-go pricing plans. Their plans include regional prefix inventory, voice analytics, and comprehensive security. Moreover, it has multiple marketing automation tools with programmable text messaging campaigns.

Twilio

Features:

  • You can record, store, and retrieve trunking calls in the cloud.
  • The sales and marketing automation allows you to campaign to your target audience.
  • Users can port existing phone numbers instead of purchasing.
  • It provides mass notifications to keep the people in your network informed.
  • The call control feature puts callers on hold or transfers them to another extension.
  • Twilio tracks and troubleshoots end-to-end call performance using voice insights.
  • You can manage inbound calls and route them to an available agent.
  • Configure disaster recovery to manage calls in case of any mishap.
  • Get real-time trigger alerts for suspicious activity warnings and other account changes.
  • Third-party integrations include Zoom, Hubspot, Intercom, Webhooks, Freshsales, and more.
  • Customer support includes e-guides, phone, email, and video tutorials.
  • Available to citizens of Netherlands, Finland, Iran, Cuba, Australia, and 100+ countries.

Pros

  • The self-service tools are easy to use.
  • Encrypt media with Secure Real-time Transport Protocol (SRTP)
  • It can transcribe voice or video call audio into texts.
  • Voice conference calls of up to 250 participants.

Cons

  • Searching for SMS logs is difficult using phone numbers.
  • Twilio’s SIP trunking does not support Fax Over IP (FoIP).

Key Specs:

Per-minute SIP Rates: $0.0034 – 0.0130
Numbers: Local, Mobile
Pricing: Plans starting at $1 a month.
Free Trial: Yes – 45 Days
Setup Fee: Free
Port Fee: None

Link: https://www.twilio.com/


5) Telnyx

Best for Getting an Automatic discount

Telnyx is an all-in-one communications platform that delivers fax, voice, SMS, and IP services. It offers carrier-grade services on a private, global IP network. Telnyx includes an elastic SIP trunk with a full outbound voice capability. You can also access enterprise-level security, fraud detection, and configuration management.

Telnyx

Features:

  • Its bulk edit feature lets you update multiple numbers at once.
  • It provides reporting on-call statistics, automatic top-up, and account balance.
  • You can troubleshoot calls with detailed debugging and SIP ladder diagnostics.
  • Telnyx allows users to customize a routing scheme for each business number.
  • Port your number with automatic Certificate Signing Request (CSR) validation.
  • It provides real-time alerts for suspicious or fraudulent activities.
  • You can make emergency calls to E911 numbers after adding an address to your account.
  • Telnyx has predictive and dedicated AI monitoring to catch number spoofing.
  • Customer support includes phone, social media, FAQs, video tutorials, and e-guides.
  • Citizens of Mexico, China, Brazil, Ireland, the UK, and 95+ countries can access Telnyx SIP Trunk.

Pros

  • It offers free cloud storage and configurable formats.
  • You can enable automatic recording per number or connection.
  • See real-time usage statistics and active calls.
  • Record and save phone calls for later reference.

Cons

  • You can’t direct notifications to different email addresses.
  • Does not offer any free trial.

Key Specs:

Per-minute SIP Rates: $0.0035 – $0.015
Numbers: Local, Toll-free
Pricing: Plans starting at $12 a month.
Free Trial: No
Setup Fee: Free
Port Fee: None

Link: https://telnyx.com/


6) Bandwidth

Best for High-definition call quality

Bandwidth is a business phone service that provides scalable and affordable SIP trunking solutions. This platform consolidates your regional and long-distance communication services into a single circuit. They also provide an IP voice network with a system of application programming interfaces (APIs).

Bandwidth SIP trunks provide options on the dashboard to order, trigger, and manage numbers in real time. Other features include 24×7 network operations centers and inbound and outbound calls. It has a Bring Your Carrier (BYOC) and delivers a 99.999% uptime guarantee.

Bandwidth

Features:

  • Get real-time analytics to get an insight into your voice and messaging performance
  • Bandwidth updates your infrastructure and systems to maintain compliance with 911 regulations.
  • The directory listings help you access caller information via the phone number database.
  • By adding a real-time caller ID to your number, ensure your customers know who is calling.
  • The workstation management allows for number ordering and migration via the dashboard.
  • The IP failover control sends your incoming calls to an alternative phone number if the network fails.
  • Third-party integrations include Genesys, RingCentral, Botsplash, GoDaddy, Microsoft Teams, etc.
  • Customer support includes phone, e-guides, submit tickets, social media, and instant chat.
  • Citizens of Malaysia, Australia, Ireland, Singapore, and 38 more countries can access Bandwidth.

Pros

  • It has a cloud-native carrier network for high-quality calling.
  • You can make high-quality outbound international calling at low fees.
  • It allows you to port multiple active phone numbers to your account.
  • Send appointment reminders to your customer’s inbox.

Cons

  • They currently do not work with third-party SMS providers.
  • Bandwidth takes a long time to resolve port requests.

Key Specs:

Per-minute SIP Rates: $0.010
Numbers: Local, Toll-free
Pricing: Plans starting at $20 a month.
Free Trial: 30 days
Setup Fee: Free
Port Fee: None

Link: https://www.bandwidth.com/


7) SignalWire

Best for Bi-directional app connections

SignalWire is a globally elastic cloud network with advanced messaging, voice, and video APIs. There are video rooms with public announcements, browser notifications, and text chats. On top of that, it is an effective enterprise-grade platform for infrastructure, applications, and communication.

Its Upgraded plans include multi-source video, end-to-end encryption, phone dial-in, and custom branding. Furthermore, there is a waiting room or lobby and a broadcast room add-on for all-hands meetings and webinars.

SignalWire

Features:

  • SignalWire Auto-dials phone numbers from a list to increase lead conversion rates.
  • The interactive voice response provides a self-service option or menu to online clients.
  • Send automated appointment text reminders to your customers.
  • Add additional security to your applications using two-factor authentication (2FA).
  • SignalWire can host video conferences with up to five participants.
  • Supervisors can provide live call coaching agents without being heard by the customer.
  • It promotes SMS marketing to increase your reach and engagement.
  • SignalWire lets you analyze inbound calls by converting speech to text.
  • You get to record and save incoming calls for later review.
  • Add SMS or voice as a second authentication factor to add an extra layer of security.
  • It can intelligently route incoming calls to an available media server.
  • Users can share their screens and stream to YouTube and Facebook.
  • It is one of the best sip providers that provides third-party integrations like Zapier and SignalWire Stack.
  • Customer support includes email, phone, e-guides, and video tutorials.
  • Citizens of Canada, USA, UK, Australia, Mexico, and 11+ countries.

Pros

  • It routes your clients to the appropriate extension depending on their queries.
  • SignalWire sends meeting transcripts to your email.
  • The system provides real-time notifications and alerts.
  • You can Bring Your Carrier to keep the costs down.

Cons

  • The Webinar functionality comes as an add-on.

Key Specs:

Per-minute SIP Rates: $0.00225 – $0.00325
Numbers: Local, DID, Toll-free
Pricing: Plans starting at $24.99 a month.
Free Trial: Yes – 30 Days
Setup Fee: Free
Port Fee: $5 per number

Link: https://signalwire.com/


8) OnSIP

Best for offering the Cheapest SIP Trunking plans

OnSIP is a cloud-based phone solution specializing in a hosted virtual PBX system. The company offers phone services with the Bring Your Own Carrier (BYOC) option. They have Unified Communications (UC) applications for instant messaging and managing calls.

It is one of the best business VoIP solutions that allow users to scale their phone systems according to their needs. The platform allows the usage of third-party softphones on mobile devices as PBX extensions. They also offer two plans, namely per seat and pay-as-you-go plan. Companies only pay for the applications they require with the pay-as-you-go plan.

OnSIP

Features:

  • You can have recorded voicemail messages from callers sent to your email as audio files.
  • It has auto attendants that use a touchstone menu to direct callers on what to do.
  • The call parking puts a call on hold and allows you to continue the conversation on a different device.
  • Dial-by-name directory will enable callers to reach agents by spelling their names.
  • Create custom on-hold music to keep callers entertained while waiting online.
  • The conference suite can host an audio call for up to 15 participants.
  • It automatically blocks any incoming calls from spam, restricting unwanted interactions.
  • Set how long the phone rings so you do not miss important calls.
  • The call management rules let you mute callers and transfer them to available colleagues.
  • It is one of the best SIP providers for business that can record calls and upload them to your cloud storage.
  • Citizens of Denmark, Australia, Canada, Sweden, Spain, and 20+ countries can get OnSIP.

Pros

  • OnSIP provides free on-network calls.
  • Users can set standard business hours for free.
  • You can access and download call history reports.
  • Port an existing phone number.

Cons

  • Conference calling is not available on macOS.
  • The services are not easy to configure and can become costly to scale.

Key Specs:

Per-minute SIP Rates: $0.039 – $0.75
Numbers: Local, Toll-free, International
Pricing: Plans starting at $18.95 a month.
Free Trial: Yes – 30 Days
Setup Fee: $7
Port Fee: $2 a month

Link: https://www.onsip.com/

What to look for in SIP Trunking providers?

Businesses seeking a SIP trunk provider need to consider some baseline requirements. The best SIP provider will deliver good customer service and make your marketing campaigns successful.

Below is a criterion to consider for the evaluation process:

  • Customer support: Look into how long the provider takes to respond to customer service requests or other service outages. Their standard resolution time, onboarding assistance, and omnichannel support should be reasonable. They should offer 24/7/365 support to all customers.
  • Pricing: The pricing of SIP services varies from one service to another. Some offer plans with a long-term commitment, while others have pay-as-you-go and bundled plans.
  • Phone system deployment type: A cloud-based or an on-premises system affects your SIP trunking choices. The on-premises systems do not offer SIP trunking, so such companies have to purchase a separate SIP provider.
  • Security certifications: SIP trunks can be prone to privacy and security threats. You can use session border controllers or Virtual Private Networks (VPNs) to avoid exposing an office network.
  • Emergency services: The Federal Communications Commission requires VoIP services to connect 911 calls. Ensure you select a SIP provider with such services.
  • Interoperability: The phone system brand plays an essential role in a SIP trunking service. Not all SIP providers are compatible with certain phone system brands. Look into the list of SIP providers that a specific business phone system supports.
  • Connection type: Many SIP providers partner with standard Internet service providers (ISPs) since they require stable internet access. Using a broadband Internet connection from an ISP is cheaper but reduces call quality and capacity.

FAQs

A trunk is a virtual telephone connection or digital circuit that uses SIP protocol over an IP network. It can carry multiple calls simultaneously using Time-Division Multiplexing (TDM).

SIP Trunking works by providing existing SIP-compatible PBX with advanced cloud-based VoIP communications. The SIP trunk connects your PBX to the ISP (internet service provider) server. The ISP connects to the Public Switched Telephone Network (PSTN) and converts from IP to analog.

Here are the best SIP Trunk providers

SIP (Session Initiation Protocol) is a specific protocol that facilitates VoIP calls and sends multimedia messages over the internet. It transfers data packets using VoIP applications, mobile devices, or computers.

On the contrary, VoIP (Voice over Internet Protocol) is a technology that transmits voice packets over the internet.

Best SIP Trunking Providers

#1 Best Overall

Nextiva

Nextiva

✔️ Free Trial: 7
Days

✔️ Countries Supported: USA, UK, Canada etc.

✔️ Per-minute SIP Rates: $0.008

✔️ Deployment: Hosted PBX

Get Free

#2 Top Pick

RingCentral

RingCentral

✔️ Free Trial: 14 Days

✔️ Countries Supported: USA, Canada, France etc.

✔️ Per-minute SIP Rates: $0.039

✔️ Deployment: Cloud PBX

Get Free


Vonage

Vonage

✔️ Free Trial: 14 Days

✔️ Countries Supported: USA, Canada, Mexico etc.

✔️ Per-minute SIP Rates: $0.0041 – $0.2575

✔️ Deployment: Cloud PBX

Get Free


Twilio

Twilio

✔️ Free Trial: 45 Days

✔️ Countries Supported: Finland, Australia, UK etc.

✔️ Per-minute SIP Rates: $0.0034 – 0.0130

✔️ Deployment: Hosted PBX

Get Free