Freeswitch
FreeSWITCH is an open-source communication framework maintained by SignalWire Inc. that provides developers direct access to SIP, RTP, codecs, and dialplan logic for building voice, video, and messaging systems, monetizing through commercial modules, support subscriptions, and SignalWire managed services.
- Company typePrivate
- Founded2006
- HeadquartersBrookfield, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Freeswitch does
FreeSWITCH is an open-source communication framework, founded in 2006 and headquartered in Brookfield, United States, that provides direct programmatic access to the media and signaling layers underpinning modern voice, video, and messaging systems. The platform handles SIP signaling, RTP media streams, codecs (including a commercial G.729A module at $10 per license), dialplans, and routing logic through a modular architecture that lets adopters load only required components and build custom integrations. More than 5,000 businesses rely on the framework, with deployments collectively serving 300 million-plus daily end users across marquee operators including Five9, Vonage (Ericsson), Amazon Connect, Oracle Cloud Application, and Zoom VoIP Phone Systems.
The project is maintained and sponsored by SignalWire Inc. (legal name; Anthony Minessale, founder and CEO), which was founded by the original FreeSWITCH core developers. Revenue is generated indirectly through three channels: (1) perpetual one-time licenses for commercial modules sold via licensing.freeswitch.com, such as the G.729A codec ($10/license, three activations) and the AMD answering-machine detection module ($50/license, two-license minimum); (2) FreeSWITCH Advantage, an annual subscription distribution with quarterly releases, security updates, and direct support for production deployments (pricing undisclosed, sales-led); and (3) SignalWire's commercial cloud services, which monetize the transition of self-managed FreeSWITCH deployments into managed voice, video, messaging, AI Agent, and MFA services.
The go-to-market blends product-led and community-led adoption (GitHub repository, Discord, community forum, bimonthly Office Hours, the annual ClueCon developer conference) with enterprise field sales for support plans, professional services, and SignalWire cloud migrations. Recent product investment has shifted toward AI-augmented call automation through the SignalWire AI Agent / Digital Employee offering and the AMD module, positioning FreeSWITCH as a foundation layer for AI-driven voice workflows.
Freeswitch firmographics
Firmographics- Name
- Freeswitch
- Legal name
- SignalWire Inc.
- Website
- https://freeswitch.com
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- FreeSWITCH is an open-source communication framework maintained by SignalWire Inc. that provides developers direct access to SIP, RTP, codecs, and dialplan logic for building voice, video, and messaging systems, monetizing through commercial modules, support subscriptions, and SignalWire managed services.
- Ownership category
- akta.pro rank
Freeswitch industry classification
Industry- Product category
- Open-Source Real-Time Communications Framework
- NAICS
- Software Publishers (5132), Wired and Wireless Telecommunications (except Satellite) (5171), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Computer Systems Design and Related Services (54151)
- SIC
- Services-Prepackaged Software (7372), Communications Services, Nec (4899), Services-Computer Integrated Systems Design (7373)
- akta.pro primary industry
- Industry-Specific Low-Code Platforms (Vertical App Platforms) (HDAEAKAL)
- akta.pro secondary industry
- Low-Code/No-Code Application Platforms (HDAEAKAA)
Keywords
Where Freeswitch is headquartered
LocationHeadquarters
- HQ city
- Brookfield
- HQ country
- United States
- HQ region
- North America
Markets served
Freeswitch business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Marketing or Sales, Infrastructure, Operations
Revenue model
- Open Source Core Software: FreeSWITCH core is free open-source software distributed under the Mozilla Public License. Revenue is not generated directly from the open-source product but through related commercial services and products from the sponsor, SignalWire.
- Commercial Modules: Licensed commercial modules including G.729A codec ($10/license) and AMD (Answering-Machine Detection, $50/license). These are perpetual licenses with limited activations. Sold through licensing.freeswitch.com.
- FreeSWITCH Advantage: A commercially licensed FreeSWITCH distribution designed for long-running production systems. Includes quarterly releases, security updates, and direct access to FreeSWITCH support. Revenue model is subscription-based.
- SignalWire Cloud Services: SignalWire offers commercial cloud services that complement FreeSWITCH deployments, including AI Agent, Voice API, Messaging API, Video API, and Multi-Factor Authentication. These are usage-based or subscription-based services for enterprises scaling beyond DIY deployments.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | FreeSWITCH Core - Open Source |
| One time/ perpetual license | One time/ perpetual license | G.729A Codec Module |
| One time/ perpetual license | One time/ perpetual license | AMD Module |
| Other | One time/ perpetual license | License Reset Fee |
| Subscription | Annual | FreeSWITCH Advantage |
Go-to-market motion4 records
Distribution channels4 records
Marketing channels9 records
Freeswitch product offering
Product offeringCore offering
FreeSWITCH is an open-source communication framework that gives developers direct access to SIP signaling, RTP media streams, codecs, dialplans, and routing logic for building voice, video, and messaging systems on their own infrastructure. Its modular architecture lets teams load only required components and integrate AI, transcription, and SignalWire cloud extensions. Commercial modules (G.729A codec, AMD) and FreeSWITCH Advantage support subscriptions provide paid revenue alongside the free MPL-licensed core.
Product overview
FreeSWITCH is an open-source communication framework offered as a single unified platform that powers voice, video, and messaging systems. The core FreeSWITCH engine provides deep control over media and signaling layers with modular architecture. Commercial modules extend the platform including the G.729A codec module for bandwidth-efficient voice compression ($10/license) and the AMD (Answering Machine Detection) module for call automation ($50/license). FreeSWITCH Advantage provides enterprise-grade support and quarterly releases for production deployments. SignalWire serves as the commercial sponsor maintaining and hosting the open-source project while offering cloud extensions.
Differentiator
Problem solved
Functional benefit
Brands
- FreeSWITCH Advantage: A supported, commercially licensed FreeSWITCH distribution designed for long-running production systems with quarterly releases, security updates, and direct support access.
Products and services
- FreeSWITCH Core Engine Open-source communication framework that provides developers direct access to media and signaling layers with a modular architecture, enabling the building of custom voice, video, and messaging systems on user-owned infrastructure. Distributed under the Mozilla Public License at no cost.
- G.729A Codec Module High-efficiency, fixed-bit-rate (8 kbit/s, 10ms frames) speech coder for FreeSWITCH based on the ACELP algorithm, optimized for minimal CPU use while delivering strong perceived voice quality. Sold as a perpetual license at $10 USD per license with 3 allowed activations.
- AMD (Answering-Machine Detection) Module Module that analyzes live FreeSWITCH call audio to distinguish human answers from answering machines/voicemail, for use in autodialers, voice automation, and large-volume call flows. Sold as a perpetual license at $50 USD with a minimum of 2 licenses.
- FreeSWITCH Advantage Commercially licensed FreeSWITCH distribution designed for long-running production systems, including quarterly releases, security updates, and direct access to FreeSWITCH support. Sold as an annual subscription; pricing requires contacting sales.
Quantifiable outcome
- 5k+ businesses rely on FreeSWITCH globally
- +1 more outcomes
Companies that use Freeswitch
Customer profileNamed customers6 records
Segments6 records
Ideal customer profiles3 records
Freeswitch technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability6 records
Feature6 records
Freeswitch partnerships and signals
Strategic signalScale indicators3 records
Recent moves5 records
Expansion highlights5 records
Freeswitch competitors and assessment
Company assessmentDirect peers
- Kamailio: Open-source SIP server focused on signaling and routing, frequently deployed alongside FreeSWITCH in telecom stacks. Directly comparable in target market (telco developers) and open-source distribution model.
- 3CX: Open-source-based PBX/communications platform offering both self-hosted and cloud deployments, competing with FreeSWITCH-powered solutions in the SMB/enterprise telephony market.
- Asterisk: The original open-source telephony/VoIP server/framework (PBX), directly comparable to FreeSWITCH as a community-driven communications stack used to build voice and messaging platforms.
Broad incumbents
- Twilio: Dominant cloud communications platform offering voice, video, and messaging APIs. Competes with SignalWire/FreeSWITCH for the same developer and enterprise communications budget, with a much broader product portfolio.
- Plivo: Cloud communications API provider for voice and messaging, identified by SignalWire as a direct competitor targeting developers building communications applications.
- Telnyx: Cloud communications platform with voice, messaging, and networking services aimed at developers and enterprises. Explicitly named by SignalWire as a direct competitor.
- Vonage (Ericsson): Cloud communications provider (now part of Ericsson) and an existing FreeSWITCH-powered customer for some products, while also competing at the API/UCaaS layer against SignalWire.
- Cisco Webex / BroadWorks: Large incumbent UCaaS/CCaaS and SIP/communications platform provider. Comparable as a software-defined telecom stack, particularly for enterprise and telco-grade deployments where FreeSWITCH also operates.
Emerging players
- Agora: Real-time engagement platform offering voice, video, and chat APIs for developers. Comparable to FreeSWITCH/SignalWire in enabling real-time communications applications, with a focus on SDK simplicity over open-source frameworks.
- LiveKit: Open-source WebRTC platform for real-time video, audio, and data, with cloud offerings. Comparable emerging alternative to FreeSWITCH for developers building real-time communications, especially video-first use cases.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks5 records
Key highlights6 records
Customer concentration
Freeswitch social profiles
Digital presenceFreeswitch financial estimates
Financial estimateRevenue estimate
Valuation estimate
Freeswitch leadership team
Management profileNumber of profiles
Profiles1 record
Freeswitch funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Freeswitch M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Freeswitch
What does Freeswitch do?
FreeSWITCH is an open-source communication framework that gives developers direct access to SIP signaling, RTP media streams, codecs, dialplans, and routing logic for building voice, video, and messaging systems on their own infrastructure. Its modular architecture lets teams load only required components and integrate AI, transcription, and SignalWire cloud extensions. Commercial modules (G.729A codec, AMD) and FreeSWITCH Advantage support subscriptions provide paid revenue alongside the free MPL-licensed core.
Is Freeswitch a public or private company?
Freeswitch is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Freeswitch founded?
Freeswitch was founded in 2006. It employs 1 to 10 people.
Where is Freeswitch based?
Freeswitch is headquartered in Brookfield, United States, in the North America region.
How does Freeswitch make money?
Four revenue lines are on record. Open Source Core Software is the primary driver. The others are commercial Modules, freeSWITCH Advantage and signalWire Cloud Services.
Who are Freeswitch's main competitors?
Direct peers on record are Kamailio, 3CX and Asterisk. Broad incumbents are Twilio, Plivo, Telnyx, Vonage (Ericsson) and Cisco Webex / BroadWorks. Emerging players are Agora and LiveKit.
Does Freeswitch have an API?
Yes. FreeSWITCH provides flexible APIs and modular architecture for extending systems and integrating with existing environments. The developer documentation is available at developer.signalwire.com with guides for FreeSWITCH, REST APIs for structured dialplan logic and workflows, and SIP/trunking APIs for carrier connectivity. SignalWire's RELAY APIs provide real-time communications capabilities that connect to FreeSWITCH's same primitives. Developer documentation is at developer.signalwire.com/freeswitch/FreeSWITCH-Explained.
What industry is Freeswitch in?
Freeswitch's product category is Open-Source Real-Time Communications Framework. Its primary akta.pro industry code is HDAEAKAL, Industry-Specific Low-Code Platforms (Vertical App Platforms), with a secondary code of HDAEAKAA, Low-Code/No-Code Application Platforms. Its NAICS code is 5132 and its SIC code is 7372.