# NFON SIP Trunk Software Pricing, Alternatives & More 2026 | Capterra > With the help of Capterra, learn about NFON SIP Trunk Software - reviews, pricing plans, popular comparisons to other Telephony products and more. Source: https://www.capterra.com/p/10025867/SIP-Trunk-Flexx --- # NFON SIP Trunk Software Review 2026: Features, Reviews, Integrations, Pros & Cons Last updated on March 13, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. Independent research methodology Capterra’s researchers use a mix of verified reviews, independent research and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology. 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[Learn more](https://www.capterra.com/resources/how-we-ensure-transparency/) [Description](#description)[Use cases](#use-cases)[Alternatives](#alternatives)[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 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://digitalmarkets.gartner.com/get-listed/claim-bx?url=https://www.nfon.com&name=NFON SIP Trunk) ## 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 (465)](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 (871) Value For Money 4.8 (4) Value For Money 4.3 (783) Customer Service 4.8 (4) Customer Service 4.1 (802) ## NFON SIP Trunk alternatives [4.1 (224)](https://www.capterra.com/p/157853/JustCall/reviews/) Starting price $29.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 80% of reviewers rated it above 4 stars [4.8 (324)](https://www.capterra.com/p/29589/CallCenterNOW/reviews/) Starting price $25.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 98% of reviewers rated it above 4 stars [Ringover](https://www.capterra.com/p/169627/RingOver/) [4.7 (871)](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/) ## Features Features with the highest number of reviews are displayed first. Those that have no reviews appear next, sorted alphabetically. 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. 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 Call Disposition 5.0 (1) 0.00% of 1 reviewers that rated this feature as important or highly important Track and report on call outcomes NFON SIP Trunk 36 features Define levels of authorization for access to specific files or systems Dashboard to view the status of ongoing processes, identify current incidents and track past activities Track and document all activities across devices, networks, and other systems Application programming interface that allows for integration with other systems/databases Distribute/route/connect calls Manage all call center activities including call monitoring, call recording, call answering, call transfer, etc. Facilitate virtual conferences that connect multiple people remotely Track and report on call outcomes Manage and track all past and future calls. Listen to live phone conversations for the purpose of training and assessing agent performance Record the audio of phone conversations for quality assurance purposes Track and report on all incoming and outgoing calls Sends voice calls to a specific queue based on predetermined criteria View caller ID details such as name and number and determine how to respond by prioritizing or blocking it Process to identify source of incoming calls, date, time, duration or caller type using a unique phone number Transfers live calls to other agents Identify the number and contact information of a caller before answering the phone Computer-telephony integration is the use of computers to manage telephone calls Centralized database of stakeholders and their contact information such as names, address, phone number etc. Built-in customer relationship management (CRM) capabilities or integration with a third-party CRM system For Cloud-based phone system that sends and receives calls via the internet. Track interaction history by documenting conversations for contacts Read and accept a combination of touch tone keypad selections and voice inputs and provide the appropriate prerecorded voice response Access software remotely via mobile devices Allows communication with customers or users via multiple channels such as phone, email, live chat, etc. Transmit voice and other information digitally Monitor wait time and abandonment for incoming requests that have not been routed Active monitoring of systems, applications, or networks Collection, analysis, and representation of numerical data and generation of reports to understand various patterns View and track pertinent metrics to find patterns and gain insights from data Enables the connectivity to send and receive calls over the internet Set up connections to third-party platforms to improve business processes Consolidate and integrate communication tools as one platform or entity to enhance business communication and collaboration Connect with meeting participants remotely over video Computer-based system that allows users to send and receive voice messages 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) ### Starting price Contact vendor for pricing Free trial available 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/)[ SugarCRM](https://www.capterra.com/p/231638/SugarCRM/)[ Salesforce Platform](https://www.capterra.com/p/268338/App-Cloud/) 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 Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. 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](https://www.capterra.com/p/10015023/Gamma/) Reasons for choosing NFON SIP Trunk Backup Möglichkeiten waren bei Nfon besser Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. 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 Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. 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 Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. ## 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. Independent research methodology Capterra's researchers use a mix of verified reviews, independent research and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology. [Learn more](https://www.capterra.com/resources/proprietary-data-research/) How Capterra verifies reviews Capterra carefully verified over 2.5 million+ reviews to bring you authentic software experiences from real users. Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI. [Learn more](https://www.capterra.com/resources/how-we-verify-reviews/) How Capterra ensures transparency Capterra lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. Capterra is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider's website. [Learn more](https://www.capterra.com/resources/how-we-ensure-transparency/)