--- title: "NFON SIP Trunk Software Pricing, Alternatives & More 2026 | Capterra" description: "With the help of Capterra, learn about NFON SIP Trunk Software - reviews, pricing plans, popular comparisons to other Telephony products and more." source_url: "https://www.capterra.com/p/10025867/SIP-Trunk-Flexx/" page_type: "product" language: "en" --- # NFON SIP Trunk Software Review 2026: Features, Reviews, Integrations, Pros & Cons Last updated on September 4, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Description](#description)[Use cases](#use-cases)[Alternatives](#alternatives)[FAQs](#faqs)[Features](#features)[Pricing](#pricing)[Integrations](#integrations)[Support](#support)[Reviews](#reviews) NFON SIP Trunk ## What is NFON SIP Trunk? NFON SIP Trunk Flexx is a cloud-based VoIP telephony solution that provides flexibility and seamless integration. It enables businesses to connect multiple telephone systems and PBX endpoints, including Microsoft Teams, into a single trunk set. The solution enhances security with call blocking and fraud detection while ensuring high availability through load balancing via a secondary PBX. It also offers flexible number routing without the need for new number blocks, self-service management portals for easy configuration, integration with Genesys Cloud and Microsoft Teams, and full telephony capabilities to meet the demands of modern businesses. ## What is NFON SIP Trunk used for? [Telephony](https://www.capterra.com/telephony-software/)[VoIP](https://www.capterra.com/voip-software/)[Cloud PBX](https://www.capterra.com/cloud-pbx-software/) Top alternative Featured Overall rating Based on 4 user reviews Reviews sentiment Positive \- Neutral \- Negative \- Contact vendor for pricing Free trial available Free version not included Capterra Shortlist charts the highest-rated and most popular products... Our "Best of" badge program showcases products with the highest ratings... Our "Best of" badge program showcases products with the highest ratings... Do you work for NFON SIP Trunk?[Manage this product listing](https://www.g2.com/products/nfon-sip-trunk/claim_requests/new?auto=true) ## Compare with a popular alternative Capterra selects software alternatives based on relevant features, verified user reviews and user interactions. Placement may be influenced by client status. ### NFON SIP Trunk 5.0 (4) VS. [4.4 (468)](https://www.capterra.com/p/158704/3CX/reviews/) Starting Price Contact vendor Starting Price $350 Flat Rate, Per Year Free Trial Free Version Pricing Options Free Trial Free Version Ease Of Use 5.0 (4) Ease Of Use 4.4 (888) Value For Money 4.8 (4) Value For Money 4.3 (798) Customer Service 4.8 (4) Customer Service 4.1 (819) ## NFON SIP Trunk alternatives [4.0 (46)](https://www.capterra.com/p/251900/Zoho-Voice/reviews/) Starting price $34.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 76% of reviewers rated it above 4 stars [4.2 (466)](https://www.capterra.com/p/184709/Aircall/reviews/) Starting price $40.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 83% of reviewers rated it above 4 stars [Ringover](https://www.capterra.com/p/169627/RingOver/) [4.7 (888)](https://www.capterra.com/p/169627/RingOver/reviews/) Starting price $29.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 96% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/169627/RingOver/) Highest Rated [VoIP.ms](https://www.capterra.com/p/203084/VoIP-ms/) [4.8 (698)](https://www.capterra.com/p/203084/VoIP-ms/reviews/) Starting price $1.10 Per User, Per Month Pricing Options Free Trial Free Version User Rating 97% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/203084/VoIP-ms/) ## FAQs about NFON SIP Trunk Overview ### What company size and specific industries is NFON SIP Trunk built for? NFON SIP Trunk is designed for businesses of all sizes, from sole traders and small companies to mid-market organizations and global enterprises. It suits any sector that needs cloud-based VoIP, PBX integration, high call volumes, and scalable telephony rather than a single industry focus. Features and Usability ### What are the key features of NFON SIP Trunk? NFON SIP Trunk offers SIP trunking and VoIP connection for cloud phone systems, plus call routing, call transfer, IVR, and queue management for call handling. It also includes call recording, call monitoring, reporting and statistics, access controls/permissions, CRM, third-party integrations, and unified communications. Integrations ### Which third-party tools and platforms does NFON SIP Trunk integrate with? NFON SIP Trunk integrates with 9 third-party tools and platforms, including communication and CRM systems such as Microsoft Teams, Salesforce Platform, HubSpot CRM, Pipedrive, Zoho CRM, Copper, and Redtail CRM, plus Shopify and Yoobi for broader business workflows. Getting Started and Support ### What customer support options does NFON SIP Trunk offer? NFON SIP Trunk provides Email/Help Desk, FAQ/Forum, Knowledge Base, Phone Support, and 24/7 Live Rep support. Support experience feedback is not available in the catalog data, so no user sentiment about response speed, helpfulness, or common issues can be confirmed. ## Features AI summary Based on 2,215 Telephony reviews Capterra data shows that buyers of telephony software rank the following features as their top priorities: - **VoIP Connection** (**54%** of reviewers rated this feature as critical) - **Call Routing** (**44%**) - **Call Monitoring** (**39%**) NFON SIP Trunk supports all three features that reviewers rate most highly: **VoIP Connection**, **Call Routing**, and **Call Monitoring**. Together, these capabilities help businesses manage call flows more efficiently, maintain visibility into call activity, and support reliable voice communication, allowing teams to handle inbound and outbound calls with greater control and consistency. VoIP Connection 4.7 (3) 66.67% of 3 reviewers that rated this feature as important or highly important Place/receive calls through voice over IP connection Call Center Management 4.5 (2) 50.00% of 2 reviewers that rated this feature as important or highly important Manage all call center activities including call monitoring, call recording, call answering, call transfer, etc. Call Recording 3.0 (1) 0.00% of 1 reviewers that rated this feature as important or highly important Record the audio of phone conversations for quality assurance purposes Online Voice Transmission 3.5 (2) 50.00% of 2 reviewers that rated this feature as important or highly important Transmit voice and other information digitally Automatic Call Distribution 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Distribute/route/connect calls Call Conferencing 4.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Facilitate virtual conferences that connect multiple people remotely NFON SIP Trunk 36 features ### All Features - Access Controls/Permissions: Define levels of authorization for access to specific files or systems - Activity Dashboard: Dashboard to view the status of ongoing processes, identify current incidents and track past activities - Activity Tracking: Track and document all activities across devices, networks, and other systems - API: Application programming interface that allows for integration with other systems/databases - Automatic Call Distribution: Distribute/route/connect calls - Call Center Management: Manage all call center activities including call monitoring, call recording, call answering, call transfer, etc. - Call Conferencing: Facilitate virtual conferences that connect multiple people remotely - Call Disposition: Track and report on call outcomes - Call List Management: Manage and track all past and future calls. - Call Monitoring: Listen to live phone conversations for the purpose of training and assessing agent performance - Call Recording: Record the audio of phone conversations for quality assurance purposes - Call Reporting: Track and report on all incoming and outgoing calls - Call Routing: Sends voice calls to a specific queue based on predetermined criteria - Call Screening: View caller ID details such as name and number and determine how to respond by prioritizing or blocking it - Call Tracking: Process to identify source of incoming calls, date, time, duration or caller type using a unique phone number - Call Transfer: Transfers live calls to other agents - Caller ID: Identify the number and contact information of a caller before answering the phone - Computer Telephony Integration: Computer-telephony integration is the use of computers to manage telephone calls - Contact Database: Centralized database of stakeholders and their contact information such as names, address, phone number etc. - CRM: Built-in customer relationship management (CRM) capabilities or integration with a third-party CRM system - For Cloud Phone Systems: For Cloud-based phone system that sends and receives calls via the internet. - Interaction Tracking: Track interaction history by documenting conversations for contacts - IVR: Read and accept a combination of touch tone keypad selections and voice inputs and provide the appropriate prerecorded voice response - Mobile Access: Access software remotely via mobile devices - Multi-Channel Communication: Allows communication with customers or users via multiple channels such as phone, email, live chat, etc. - Online Voice Transmission: Transmit voice and other information digitally - Queue Management: Monitor wait time and abandonment for incoming requests that have not been routed - Real-Time Monitoring: Active monitoring of systems, applications, or networks - Reporting & Statistics: Collection, analysis, and representation of numerical data and generation of reports to understand various patterns - Reporting/Analytics: View and track pertinent metrics to find patterns and gain insights from data - SIP Trunking: Enables the connectivity to send and receive calls over the internet - Third-Party Integrations: Set up connections to third-party platforms to improve business processes - Unified Communications: Consolidate and integrate communication tools as one platform or entity to enhance business communication and collaboration - Video Conferencing: Connect with meeting participants remotely over video - Voice Mail: Computer-based system that allows users to send and receive voice messages - VoIP Connection: Place/receive calls through voice over IP connection --- Get Advice We can help you find the software with the features you need. Features 5.0 (4) 5.0 Based on 4 reviews ## Pricing Value for money 4.8 (4) Free Trial SIP Trunk Flexx Basic Contact Vendor for Pricing It includes: - Detect fraud - Block calls - Integrate PSTN connectivity - Microsoft Teams\* Integration - Backup systems - Self-service portals - Conference services SIP Trunk Flexx Premium Contact Vendor for Pricing It includes: - Detect fraud - Block calls - Integrate PSTN connectivity - Microsoft Teams\* Integration - Self-service hub - Backup systems - Self-service portals - Conference services Value for money 4.8 (4) 4.8 Based on 4 reviews ## Integrations [ Microsoft Teams](https://www.capterra.com/p/168668/Microsoft-Teams/)[ Zoho CRM](https://www.capterra.com/p/155928/Zoho-CRM/)[ Shopify](https://www.capterra.com/p/83891/Shopify/)[ HubSpot CRM](https://www.capterra.com/p/152373/HubSpot-CRM/)[ Pipedrive](https://www.capterra.com/p/132666/Pipedrive/)[ Copper](https://www.capterra.com/p/141642/Copper/)[ Salesforce Platform](https://www.capterra.com/p/268338/App-Cloud/)[ Redtail CRM](https://www.capterra.com/p/121349/RedTail-CRM/) Connect with a Capterra advisor for a free 15-minute consultation Get a personalized software list aligned to your business needs with guidance from our expert advisors. Our team has helped 1 million+ businesses like yours find options that fit their needs. ## Support, customer service and training options Customer Service 4.8 (4) Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Deployment - Web - Android - iPhone/iPad Typical users - Freelancers - Small businesses - Mid size businesses - Enterprises Customer Service 4.8 (4) 4.8 Based on 4 reviews ## User reviews Overall rating 5.0 Based on 4 reviews Filter by rating 5(4) 4(0) 3(0) 2(0) 1(0) Mentioned topic Sorted by most recent TA Till A. Senior Manager Automotive ### "Flexibel und zuverlässig mit kleinen Hürden bei der Einrichtung" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 8/10 January 4, 2025 eine Erfahrung mit SIP Trunk Flexx ist insgesamt positiv. Es bietet eine gute Mischung aus Flexibilität, Skalierbarkeit und Zuverlässigkeit. Die Einrichtung war zwar etwas komplex, aber nach der Implementierung läuft alles stabil und die Sprachqualität ist hervorragend. Für moderne Kommunikationsanforderungen ist es eine solide Lösung. Pros SIP Trunk Flexx finde ich gut, weil es flexibel, kosteneffizient und super einfach skalierbar ist. Außerdem passt es zu bestehenden Systemen und bietet Top-Sprachqualität – genau das, was man für moderne Kommunikation braucht! Cons Manchmal können die Einrichtung und Integration mit älteren Systemen etwas kompliziert sein. Außerdem hängt die Qualität stark von der Internetverbindung ab, und zusätzliche Kosten für Support oder Upgrades könnten anfallen. Review source Vendor Referred - Incentive Offered: This reviewer was invited by the software vendor to submit an honest review and offered a nominal incentive as a thank you. MR Matthais R. CEO Information Technology and Services ### "SIP Trunk Flexx, einfacher und flexibler geht es kaum..." 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 December 11, 2024 Beantragt, Zugänge erhalten, alles im Telefonsystem eintragen lassen... läuft Pros Er läuft an jedem Telefonsystem ohne Probleme und hat sehr viele Backup Möglichkeiten bei Ausfällen von Telefonsystemen. Cons gibt keinen Nachteil... wirklich... habe keinen gefunden... Alternatives considered [Gamma AI](https://www.capterra.com/p/10015023/Gamma/) Reasons for choosing NFON SIP Trunk Backup Möglichkeiten waren bei Nfon besser Review source Vendor Referred - Incentive Offered: This reviewer was invited by the software vendor to submit an honest review and offered a nominal incentive as a thank you. JQ Jens Q. Geschäftsführer Information Technology and Services ### "SIP Trunk und Teams perfekt" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 December 4, 2024 Wir nutzen das Produkt um Microsoft Team mit Telefonie zu integrieren und es funktioniert super. Pros Gute Sprachqualität, leichte Integration Cons Es gibt hier ehrlich gesagt keine negativen Aspekte. Das Produkt funktioniert einfach. Review source Vendor Referred - Incentive Offered: This reviewer was invited by the software vendor to submit an honest review and offered a nominal incentive as a thank you. TS Tobias S. IT Consulting und Projektmanagement Information Technology and Services ### "Das beste Produkt im NFON Portfolio" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 4.0 4.0 Likelihood to Recommend 10/10 December 4, 2024 Das absolute Lieblingsprodukt i.v.m. Microsoft Teams Phone mit oder STARFACE. Aktuell auch das beste Produkt aus dem NFON Portfolio. Pros Der Trunk sucht am Markt seines gleichen. Die hybride Nutzung beispielsweise an einer PBX und gleichzeitig an MS Teams ist das absolute Highlight. Aus Kundensicht passt auch noch zusätzlich der niedrige Preis - aus Partnersicht dürfte der Trunk etwas teurer sein. Cons Das Auftragsformular ist etwas undurchsichtig, da zu viele Optionen. Einfacher wäre es, wenn es nur ein Pricing gäbe (Preis pro Kanal) und dies beliebig hochskaliert werden kann. Die verschiedenen Pakete verwirren teilweise nur. Switched from [Cloudya](https://www.capterra.com/p/184983/NFON/) Der Wechsel auf Teams Phone. Hierzu wurde ein flexibler Trunk benötigt. Review source Vendor Referred - Incentive Offered: This reviewer was invited by the software vendor to submit an honest review and offered a nominal incentive as a thank you. ## Top-rated software of 2026 ### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox.