8 Best SIP Trunk Providers (2025 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. Read more…

Best SIP Trunking Providers: Cheap Options

1) Hushed

Best For Anonymous calling and texting

Hushed system provides redundant SIP servers for low-latency connectivity. It is particularly appreciated by users who value their privacy and wish to keep their phone numbers out of the public domain. The app’s capabilities in supporting audio calls along with text and multimedia sharing are exactly what users typically look for in such tools.

The plans include all-inclusive pricing with metered and unmetered SIP Trunking. it allowed me to test the service in a 3-day free trial. You can benefit from Hushed by using multiple numbers from countries like the US, Canada, and the UK.

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 send and receive texts, images, emojis, GIFs, and audio messages instantly.
• Hushed SIP Trunking solution has a rapid setup that you can deploy without coding.
• Configure call routing based on business hours or phone numbers.
• Bundled minutes/SMS for local calling and texting.
• It places inbound callers into queues to minimize calling wait times.
• You can record and customize your voicemail to suit your personal or professional needs.
• Hushed provided me with local numbers for selected countries, including the US and UK, for global accessibility.
• Third-party integrations include Slack and Dropbox
• Customer support includes FAQs, chat, social media, and guides.
• Citizens of Puerto Rico, the United Kingdom, the USA, and Canada can get Hushed SIP Trunk.

Key Specs:

Per-minute SIP Rates: NA
Numbers: Local, International, Toll-free
Pricing: Plans start at One-time payment of $25.
Free Trial: Yes – 3 Days
Setup Fee: NA
Port Fee: None

Visit Hushed >>

3-Days Free Trial

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2) Zoom

Best user-friendly interface

Zoom is a cloud business communications solution that offers virtual PBX (Private Branch exchange). It provides high-quality audio, team collaboration tools, messaging, and video calling across all plans. Zoom Phone also enables video conferences, phone calls, and unlimited SMS.

Its plans offer unlimited calls and messaging and provide an option to add desk phones. Zoom even blocks robocalls, which helped keep my calls clear. In my experience, Zoom is one of the best for local and toll-free number support, and their support team is quick to help through email and phone.

Features:

• Receive instant voicemail notifications via email or Zoom mobile and desktop apps.
• Get connected in an audio conference with up to 1,000 people.
• Zoom Phone supports routing, conference, call parking, forwarding, call blocking, recording, and call transfer.
• Intercom calling enables hands-free peer-to-peer conversations.
• It helps businesses collaborate and build conference rooms that allow interactive meetings and teamwork.
• Zoom lets you send business SMS and MMS from your business phone number.
• Users can send files and share their screens during meeting presentations.
• It offers real-time analytics and reports on registrants, attendees, polling, attendee engagement, and Q&A for follow-up.
• Third-party integrations include Microsoft, Google, Salesforce, and more.
• Customer support provides live chat chatbot, call, contact form, and knowledge base.
• Citizens of USA and Canada.

Key Specs:

Per-minute SIP Rates: NA
Numbers: Toll-free
Pricing: Plans start at $15 a month. 17% Discount on Yearly Payment.
Free Trial: Lifetime Free Basic Plan
Setup Fee: NA
Port Fee: None

Visit Zoom >>

Lifetime Free Basic Plan

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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).

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.

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

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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.

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.

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/

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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.

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.

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/

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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.

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.

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/

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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.

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.

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/

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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.

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.

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