FreePBX vs. OpenSIPS Comparison


FreePBX Sangoma Technologies	OpenSIPS	+	+
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		Related Products 3CX 3CX is a software-based, open standards IP PBX that offers complete Unified Communications, out of the box. Suitable for any business size or industry 3CX can accommodate every need; from mobility and status to advanced contact center features and more, at a fraction of the cost. Ideal for companies working remotely, 3CX includes mobile apps, video conferencing and website live chat. Installation, management and maintenance of the PBX is so easy that you can effortlessly manage it yourself, whether on an appliance or server at your premise on Windows, Linux or in the cloud. Alternatively you can choose to have it hosted by 3CX for a completely hassle-free solution. 1,237 Ratings Visit Website PBXware PBXware is the world’s first and most mature IP PBX Professional Open Standards Turnkey Telephony Platform. Since 2004, PBXware has deployed flexible, reliable, and scalable Next Generation Communication Systems and VoIP solutions to Small and Medium sized Businesses (SMBs), enterprises, Internet Telephony Service Providers (ITSPs), Call Centers and governments worldwide by combining the most advanced of the latest technologies. Bicom Systems’ softswitch is offered in Business, Contact Center and Multi-Tenant Editions, each supporting specific features maximizing performance, reliability, and expandability. 39 Ratings Visit Website Yeastar P-Series PBX System Focusing on delivering "Easy-first Unified Communications", Yeastar P-Series Phone System offers companies of all sizes with a complete package for calls, video, messaging, and integrations, out of the box. With in-built visual call management, integrated video conferencing, advanced contact center features, and ready-made SMS, WhatsApp, Microsoft Teams, CRMs, and more platform integrations, P-Series boosts productivity at all levels and provides everything across desktop, mobile, and browser with simple user apps. Available in the Appliance, Software, and Cloud Editions, P-Series provides flexible deployment options, allowing you to have it sited on-premises or in the cloud. Balancing costs and future growth, it requires a lower total cost of ownership, less training, and fewer management efforts. The ease of use and future-proof adaptability are paramount. 116 Ratings Visit Website Signalmash Signalmash is a boutique CPaaS built for businesses that need reliable communications and real human support behind every interaction. No tiers. No wait times. Real support for faster development and better outcomes for your customers. Our enterprise-grade customer gets a dedicated Slack channel with our engineers. Direct Tier-1 connections with AT&T, Verizon & T-Mobile. 94% first-time 10DLC approval rate. SMS: 10DLC \| Short code \| Toll-free \| SimplyRCS (simplyrcs.ai): RCS Rich \| RCS Media through API & No-Code Platform Voice: SIP Trunking \| VoIP \| Termination \| Origination Numbers/DIDs: Local, short code & toll-free numbers \| BCID (Branded Caller ID) Number Intelligence/Lookup: Subscriber Info (CNAM) \| Carrier Information \| Carrier Type (Fixed or Wireless) \| Federal DNC Status Signalmash enterprise-grade reliability, boutique-level support. 16 Ratings Visit Website TollFreeForwarding Activate your new international phone number in 60 seconds. Choose from phone numbers in over 120+ countries and 1,000 cities. Forward your calls to any phone number in the world. Robust scheduling options allow you to route your calls based on the days and hours of your business. Route your calls to your main call center during business hours and to voicemail during non-business hours. Instantly view detailed information about calls made to your TollFreeForwarding phone number. Learn about your customers' call habits to help make decisions about outbound sales and follow-up. Keep track of your calls by recording all or some of your calls. Recorded calls are stored in call detail records and can be played or downloaded at any time. 3,231 Ratings Visit Website 800.com 800.com is a business phone and call tracking platform that helps small and growing businesses understand, manage, and respond to inbound calls more effectively. The platform provides local and toll-free numbers, call tracking, call recording, voicemail, SMS, and detailed call reporting so teams can see where calls come from and how they’re handled. Businesses use 800.com to track phone leads across websites, ads, social media, and offline marketing, improve response times, and follow up on missed calls. With integrations for Google Ads, GA4, Meta, Microsoft Ads, and popular CRMs, 800.com connects call data to marketing and sales workflows. The platform is easy to set up, flexible as businesses grow, and designed to turn phone calls into clearer insights and better customer experiences. 2,436 Ratings Visit Website Zoom Phone Zoom Phone is an AI-powered cloud-based business phone system that provides voice calling, messaging, and unified communications through a Voice over Internet Protocol (VoIP) platform. The software enables employees to make and receive business calls from desktop computers, mobile devices, and compatible desk phones. Its calling features include auto receptionists, call queues, call forwarding, voicemail, call recording, SMS, and intelligent call routing. Built-in AI capabilities provide post-call summaries, voicemail transcription, action item extraction, and automated follow-up assistance. Zoom Phone also supports an optional AI receptionist that answers customer inquiries, schedules appointments, and transfers calls to appropriate employees. The platform integrates with Zoom Meetings, Zoom Chat, Salesforce, Microsoft, Google, and other business applications while providing centralized administration and call analytics. 2,944 Ratings Visit Website Intulse Intulse is a business VoIP provider offering hosted/cloud VoIP services for businesses. Managed VOIP phone systems with speed, flexibility, and more for small & large businesses in the USA. Intulse was founded in 2015 to help businesses that were stuck using old communication systems that only did a little but cost a whole lot find a better solution to meet their needs. Intulse’s VoIP UCaaS (Unified Communication as a Service) solutions are designed to increase productivity through the Intulse App, CRM integration (ex. Salesforce & HubSpot), softphones, time-based routing, virtual receptionists, customized greetings, unlimited extensions, and more. Customers who choose Intulse as their cloud VoIP provider get the power of a feature-rich system that can be customized to best-fit how they do business. Intulse’s communications specialists work closely to help select and implement features to ensure each business gets the most out of their system and service. 140 Ratings Visit Website Aircall Aircall is an AI-powered customer communications and intelligence platform that unifies phone, messaging, and call center operations. Designed for sales and support teams, it enhances every interaction with features like AI Voice Agents, real-time conversation coaching, and integrated WhatsApp messaging. With powerful analytics, call recording, and shared inboxes, teams gain clarity and can resolve customer issues faster. The platform is easy to set up, offering quick number claiming, seamless integrations, and customizable workflows. Trusted by over 23,000 companies worldwide, Aircall helps businesses improve connection rates, boost CSAT scores, and streamline onboarding. By combining automation with human-first AI, Aircall reduces busywork so teams can focus on building better customer relationships. 1,838 Ratings Visit Website Intermedia Unite Intermedia Unite® brings business communications, collaboration, and customer engagement into one easy-to-use platform—keeping teams connected, productive, and responsive from anywhere. It replaces fragmented tools by combining business phone service, video conferencing, team chat, and file sharing into one seamless experience, so employees can collaborate without switching apps. Unite delivers enterprise-grade calling with 100+ features, integrated customer engagement, and enhanced Microsoft Teams experiences. With mobile and desktop apps, users can call, meet, message, and engage customers from anywhere while maintaining a consistent business identity. AI-powered transcription, summaries, and insights help teams capture details and follow up efficiently. Backed by 99.999% uptime and J.D. Power-certified support, Unite ensures reliable performance—resulting in simpler communications, more productive teams, and better customer engagement. 1,634 Ratings Visit Website
About The “Free” in FreePBX stands for Freedom. That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs. Discover the power of open source communications. Take a look at all the built-in features FreePBX has to offer and start building your phone system. Transform your FreePBX install into a robust Unified Communications system with commercial modules from Sangoma and other add-ons for FreePBX. Visit the Knowledge Base on the FreePBX Wiki! Or let FreePBX experts assist with support for installing FreePBX, updating, troubleshooting, and beyond. Completely free to download and use, the power of FreePBX comes from a global community of developers who ensure it remains a high compatibility and customizable platform with all the key features needed to build a scalable business phone system on any budget.	About OpenSIPS is an open-source SIP proxy/server for voice, video, IM, presence, and any other SIP extensions. OpenSIPS is a multi-functional, multi-purpose signaling SIP server used by carriers, telecoms or ITSPs for solutions like Class4/5 residential platforms, trunking/wholesale, enterprise/virtual PBX solutions, session border controllers, application servers, front-end load balancers, IMS platforms, call centers, and many others. OpenSIPS is recommended for any kind of SIP scenario/service by the high throughput, tens of thousands of CPS, millions of ‏simultaneous calls (see official tests), the flexibility of routing and integration, routing scripts for implementing custom routing logics, several interfacing APIs. The effective application building, more than 120 modules to provide features, for SIP handling, backend operations, integration, the routing logic. OpenSIPS 3.2 release was the subject of a security audit, making everything safer and more secure for everybody.
Platforms Supported Windows Not Supported Mac Not Supported Linux Supported Cloud Not Supported On-Premises Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported	Platforms Supported Windows Not Supported Mac Not Supported Linux Supported Cloud Not Supported On-Premises Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported
Audience Companies interested in a completely free open source PBX system	Audience Companies searching for a signaling SIP server solution to manage and improve their communication
Support Phone Support Not Supported 24/7 Live Support Not Supported Online Not Supported	Support Phone Support Not Supported 24/7 Live Support Not Supported Online Supported
API Offers API Not Supported	API Offers API Supported
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing No information available. Free Version Supported Free Trial Not Supported	Pricing Free Free Version Supported Free Trial Not Supported
Reviews/Ratings Overall 4.0 / 5 ease 1.0 / 5 features 5.0 / 5 design 5.0 / 5 support 1.0 / 5 Read all reviews	Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software
Pros & Cons from Real Users Pros Have used FreePBX since 2007 and reliable and stable PBX, since then Sangoma have added lots of new features that any business could use. I think as in a free system, FreePBX is great if you have technical knowledge to set it up. Cons I can't say I have ever used their support, but seem lots more expensive than big vendors like Cisco for support. I am sure to compete in this arena they will improve the support model. The system is good, so might not need support most answers are found online. The only reason for support are bugs that may come up.
Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Supported Live Online Not Supported In Person Not Supported
Company Information Sangoma Technologies Founded: 1984 Canada www.freepbx.org	Company Information OpenSIPS United States opensips.org
Alternatives 3CX	Alternatives ICTPBX ICTInnovations
Yeastar P-Series PBX System Yeastar	Kamailio
Asterisk Sangoma Technologies	SessionPBX SessionTalk
SIPStation Sangoma	PBXware Bicom Systems
Wiretap Telecom View All	VaxVoIP VaxSoft View All
Categories PBX Supported Telephony Supported	Categories PBX Supported

Integrations AWS Marketplace Supported Azure Marketplace Supported CRMTiger Supported DID Logic Supported DIDforSale Supported Docker Not Supported Dynamics Telephony Supported FlyNumber Supported Fonimo Not Supported GTranscribe Supported ICTBroadcast Supported NetThunder Supported Oreka TR Supported PBXDom Supported SIP Caller Supported SIP.US Supported SIPStation Supported Syncro Supported Telnyx Supported Wiretap Telecom Supported Show More Integrations View All 19 Integrations	Integrations AWS Marketplace Not Supported Azure Marketplace Not Supported CRMTiger Not Supported DID Logic Not Supported DIDforSale Not Supported Docker Supported Dynamics Telephony Not Supported FlyNumber Not Supported Fonimo Supported GTranscribe Not Supported ICTBroadcast Not Supported NetThunder Not Supported Oreka TR Not Supported PBXDom Not Supported SIP Caller Not Supported SIP.US Not Supported SIPStation Not Supported Syncro Not Supported Telnyx Not Supported Wiretap Telecom Not Supported Show More Integrations View All 4 Integrations
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