PortSIP

What PortSIP does

PortSIP is a privately held software provider of SIP-based unified communications solutions, founded in 2013 and headquartered in Changsha, China (with a secondary office in Guangzhou and a UK-registered legal entity, PortSIP Solutions, Inc.). Its proprietary, self-developed technology stack spans five core products: PortSIP PBX (a multi-tenant software PBX supporting up to 10,000 concurrent calls per server with built-in SBC, video conferencing, WebRTC, RCS-style messaging, and Microsoft Teams Direct Routing), PortSIP SBC (a cloud-native Session Border Controller), PortSIP VoIP SDK (a royalty-free cross-platform SDK for iOS, Android, Windows, macOS, and WebRTC), PortSIP UCaaS (a carrier-grade clustered platform supporting millions of users with elastic scaling for telecom operators), and PortSIP Softphone (a branded UC client). The company serves four distinct customer segments — SMBs, telecom operators and carriers, app developers/system integrators, and enterprises with on-premise UC requirements — and reports 10,000+ companies and organizations across its global customer base, including logos such as Telstra, FPT Group, wonet, Queensland Rail, Chubb, Qualcomm, HP, Siemens, Netflix, and ITS Group.

The business model is predominantly one-time perpetual licensing denominated in RMB, with paid tier pricing scaled to extensions or concurrent calls, plus optional 20%-of-purchase-price annual maintenance contracts that provide recurring support and upgrades. Free-tier versions of every product (limited to 3 concurrent calls / 10 extensions for PBX) drive self-serve top-of-funnel adoption, while commercial sales are quote-driven and routed through [email protected], a 24/7 hotline, and a structured partner program that includes an exclusive distributor (INTERBIT in Greece/Cyprus) plus technology partnerships with major IP phone vendors (Yealink, Htek, Snom, Grandstream, Fanvil, Dinstar, Alcatel-Lucent Enterprise, Polycom). Distribution also extends through iOS App Store, Google Play, and direct website downloads, with electronic delivery within 12 hours of purchase. No external funding, M&A, or leadership changes beyond CTO Peter Andry are disclosed, indicating a founder/management-owned, organically grown operating profile with active product release cadence through at least June 2024.

Name

PortSIP

Legal name

PortSIP Solutions, Inc.

Website

https://portsip.cn

Company type

Private

Founded year

2013

Operating status

Operating

Short description

PortSIP develops proprietary SIP-based unified communications software — PBX, SBC, VoIP SDK, UCaaS cluster, and Softphone — serving 10,000+ SMBs, telecom operators (Telstra, FPT, wonet), developers, and enterprises globally from its China-UK headquarters.

Ownership category

akta.pro rank

Product category

Unified Communications Software

NAICS

Software Publishers (5132), Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers (516210)

SIC

Radiotelephone Communications (4812)

akta.pro primary industry

Cloud PBX & Hosted Telephony (HDAIAHAB)

akta.pro secondary industry

CPaaS (Programmable Voice, SMS, Video APIs) (HDAIAHAG)

Keywords

• Software VoIP PBX
• Session border controller
• VoIP SDK
• Unified communications platform
• UCaaS cluster

Headquarters

HQ city

Changsha

HQ country

China

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. PortSIP PBX Perpetual License: One-time perpetual (lifetime) license fee for PortSIP PBX based on the number of extensions (no concurrent call limit). Includes one year of free technical support and version upgrades. After the first year, annual maintenance at 20% of the purchase price. On-site technical support available at RMB 1,200 per day.
2. PortSIP SBC License: Pricing based on the number of concurrent calls with no feature restrictions. Available as lifetime (perpetual) or annual subscription license. Lifetime license includes one year of free support/upgrades; after that, 20% of purchase price annually for maintenance. On-site support at RMB 2,500/day.
3. PortSIP VoIP SDK License: One-time perpetual license fee. Royalty-free: buyers can develop unlimited applications and distribute to unlimited end users without additional royalties. SDK is sold directly by PortSIP. Includes one year of free updates and technical support. Bundle discounts available when purchased with PortSIP PBX.
4. PortSIP Softphone / Custom Branding License: Custom branded softphone licenses with no end-user restrictions. Buyers can distribute to unlimited end users. Packages available for Windows (D1/D2), iOS (O1/O2), and Android (A1/A2) with varying feature sets (audio-only vs. audio+video+IM+Presence). Includes one year of free updates and support.
5. Annual Maintenance and Support Services: Annual maintenance contracts (20% of license price per year) providing free technical support, version upgrades, and access to new releases. 24/7 phone and email support included. New licenses include one year of free maintenance. After expiry, a one-month renewal grace period applies before re-purchase is required.
6. Professional and Custom Development Services: PortSIP offers professional services including custom development, deployment consulting, and tailored solutions for customers with specific business needs, providing competitive advantages through unique features.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

PortSIP develops and licenses proprietary, self-developed SIP-based unified communications software, including a multi-tenant software IP PBX, a virtualized/cloud-native Session Border Controller (SBC), a cross-platform VoIP SDK, softphone client apps, and a carrier-grade UCaaS clustering platform. Products are sold as perpetual licenses with optional annual maintenance to SMBs, enterprises, telecom operators, and app developers.

Product overview

PortSIP is a provider of software-based unified communications solutions. Its product portfolio consists of five core products: PortSIP PBX (a multi-tenant software IP PBX with integrated SBC, call center, and video conferencing), PortSIP SBC (a standalone virtualized/cloud-native Session Border Controller), PortSIP VoIP SDK (a cross-platform SIP client SDK for building custom audio/video/IM apps), PortSIP UCaaS (a carrier-grade UCaaS clustering platform for operators supporting millions of users with auto-elastic scaling), and PortSIP Softphone (a unified communications client app for iOS, Android, Windows, and macOS). These products are built on SIP standard protocols and are available for on-premise, private cloud, and public cloud deployment. The portfolio includes free versions (limited to 3 concurrent calls) and licensed versions sold as perpetual licenses with optional annual maintenance.

Differentiator

Problem solved

Functional benefit

Brands

• PortSIP PBX: Multi-tenant software-based IP PBX providing audio/video and WebRTC communications for unified communications
• PortSIP SBC
• PortSIP VoIP SDK
• PortSIP Softphone
• PortSIP UCaaS

Products and services

• PortSIP PBX A software-based multi-tenant VoIP IP PBX supporting audio/video calls, instant messaging, video conferencing, WebRTC, presence, push notifications, Microsoft Teams Direct Routing, and a built-in SBC. Deployable on Windows or Linux (Docker), on-premise or cloud, with single-server performance up to 10,000 concurrent calls. Targeted at SMBs and cloud deployments.
• PortSIP SBC A virtualized and cloud-native Session Border Controller providing VoIP security (topology hiding, encryption, DoS protection), SIP trunk interconnection, Microsoft Teams Direct Routing, and WebRTC bridging. Supports cluster deployment with 5,000+ concurrent calls per server. For enterprises and operators requiring secure SIP trunking.
• PortSIP VoIP SDK A cross-platform SIP SDK for iOS, Android, Windows, macOS, and WebRTC enabling development of HD audio/video and instant messaging applications. Supports iOS CallKit, 3GPP IMS, and codecs including G.729, Opus, AMR-WB, H.264, VP8. Sold with royalty-free distribution for app developers, system integrators, and device makers.
• PortSIP UCaaS A carrier-grade unified-communications-as-a-service clustering system built on PortSIP PBX, supporting millions of users with auto-elastic scaling and high availability. Components include Edge Proxy Server, Call Manager, Media Server, REST API Gateway, WebRTC Gateway, Presence, and Conference Server, deployable on private or public cloud. For telecom operators and carriers.
• PortSIP Softphone / PortGo App A unified communications client for iOS, Android, Windows, and macOS providing HD audio/video calls, instant messaging, presence, video conferencing, screen sharing, and mobile push notifications. Available in free and brand-customizable (white-label) paid versions.
• Professional and Custom Development Services Professional services including custom development, deployment consulting, and tailored solutions for customers with specific business needs, plus annual maintenance/support contracts and on-site technical support.

Quantifiable outcome

• 40% cost reduction compared to previous PBX versions, with more flexible license options and lower entry point
• +5 more outcomes

Named customers23 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

Feature8 records

Partnerships

Four partnerships are on record, tiered core.

• INTERBITcoreChannel Partner/ Reseller/ Distributor · 2 February 2018INTERBIT, a Greece-based IT Distributor headquartered in Heraklion, Crete, is the exclusive distributor of PortSIP in Greece and Cyprus. With a network of over 100 resellers and partners covering all territories of Greece and Cyprus, INTERBIT provides a significant sales channel for PortSIP's unified communications solutions in the region. INTERBIT was previously a 3CX代理商 and switched to representing PortSIP after being attracted by PortSIP's unique advantages, planning to expand across Europe in 2019.
• TelstracoreTechnology or Integration · 7 December 2017Telstra, Australia's largest communication operator and state-owned enterprise serving 30 million customers, signed a procurement contract with PortSIP to purchase PortSIP VoIP SDK as the development framework for their RCS (Rich Communication Suite) applications. After strict testing against multiple products, PortSIP was selected for its stable, full-featured, and powerful VoIP communication framework.
• Dialogic Corporation (Telus Home Hub Program)coreStrategic or Co-development Partner · 7 December 2017PortSIP settled agreements with Dialogic Corporation to provide software and technical support for the Telus Home Hub project. Dialogic provides CTI products globally and focuses on cloud communication solutions and services. The Telus Home Hub project is the fourth cooperation between PortSIP and Dialogic since 2013.
• Dialogic CorporationcoreTechnology or Integration · 25 March 2016Dialogic Corporation, the industry leader in cloud-optimized real-time multimedia processing solutions and network infrastructure, selected PortSIP for building communications solutions. PortSIP provides products and technical support to Dialogic for various projects including the Telus Home Hub program (the fourth cooperation since 2013), reflecting effective technical collaboration and PortSIP's extraordinary product performance.

Scale indicators11 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Twilio: Cloud CPaaS leader providing programmable voice, video, and messaging APIs. Directly competes with PortSIP's VoIP SDK positioning and increasingly bundles UCaaS via partners, threatening PortSIP's developer ecosystem.
• Agora: Real-time engagement CPaaS provider offering voice, video, and messaging SDKs across mobile and web. Closest direct competitor to PortSIP's cross-platform VoIP SDK for embedded communications use cases.
• Asterisk / FreeSWITCH (open source): Open-source telephony platforms that underpin many PBX offerings and compete at the low end of the market. PortSIP explicitly competes against and outperforms these on benchmarks, and uses the open-source comparison to justify its proprietary positioning.

Direct peers

• 3CX: Software-based IP PBX provider offering a similar multi-tenant, SIP-based UC platform for SMBs and enterprises. PortSIP explicitly differentiates against 3CX by being fully proprietary (not open-source-derived) and competing for the same channel-driven SMB and mid-market deals.
• Sangoma Technologies: Provider of communications and UC solutions including PBXact (software PBX), SBC, and SIP phones targeting SMBs and carriers. Comparable in product breadth (PBX + SBC + endpoint devices), perpetual/ subscription pricing model, and channel-driven GTM.

Broad incumbents

• Avaya: Legacy enterprise UC and contact center incumbent with large installed base transitioning to cloud. PortSIP positions as a modern, cost-efficient alternative for customers seeking to replace or augment Avaya infrastructure.
• Mitel: Established global UC and business communications vendor offering on-premise and cloud UCaaS, contact center, and IP phones. Competes with PortSIP in mid-market and enterprise deployments and is a referenced interoperability partner.
• Cisco (BroadSoft/Webex): Global UCaaS/contact center giant with Webex Calling and BroadWorks. PortSIP competes for SMB and operator UCaaS deals and maintains SIP interoperability with Cisco endpoints; Cisco Brazil is named as a PortSIP customer.
• RingCentral: Pure-play UCaaS leader offering cloud PBX, contact center, and team messaging on subscription. Competes directly with PortSIP UCaaS in the operator and mid-market segments and is listed as a PortSIP customer/integrator reference.

Regional players

• Huawei (eSpace / SmartUC): Chinese-headquartered communications vendor offering IP PBX, UC, and contact center solutions. Comparable in China-centric Xinchuang positioning and ability to serve large state-owned enterprise and operator customers, but primarily competes in Asia-Pacific.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PortSIP