Sipsynergy

What Sipsynergy does

Sipsynergy Limited is a UK-based, 100% channel-only cloud communications provider (founded 2011, headquartered in Eastleigh with trading offices in Chandlers Ford) serving telephony resellers, system integrators, ISPs, and distributors. The company offers three core platforms: Business Hosted Communication (BHC), its proprietary per-user cloud telephony solution for SMBs; Enterprise Hosted Collaboration (EHC), a Cisco Hosted Collaboration Service (HCS)-powered UCaaS platform with Cisco Flex Plan licensing for enterprise deployments; and SIP Trunking for ISDN-to-cloud migration. Underlying technology is Cisco HCS with AWS cloud infrastructure, exposed to partners via the proprietary Gateway RESTful-API portal for quoting, provisioning, billing, and support. Following its 2024 acquisition by 8x8 alongside Callroute, the company is consolidating onto Callroute's AWS-hosted orchestration engine with deep Microsoft Teams Direct Routing and Webex Calling integrations, retiring EHC and migrating BHC/SIP Trunking customers onto the new platform.

The business model is subscription-driven and partner-mediated: partners purchase per-user / per-channel seats at contracted margins and resell to end-customers, generating recurring monthly revenue for Sipsynergy. Sipsynergy reports 97% renewal rates enabling three-year partner contracts, ISO 27001:2013 and ISO 22301 certifications to meet enterprise security and continuity requirements, and a small but verifiable slate of named channel partner customers (ITGL, BCN, Atomos, Provista, Simplicity). Pricing is quote-based and not publicly disclosed, with a representative 100-seat order capable of delivering approximately £10k of margin to a partner over three years. The company operates exclusively in the UK and Ireland and positions itself as a Cisco Powered service and the only UK Cisco HCS partner able to serve enterprise deployments under 150 users.

Name

Sipsynergy

Legal name

Sipsynergy Limited

Website

https://sipsynergy.co.uk

Company type

Private

Founded year

2011

Operating status

Acquired

Headcount range

11–50 employees

Short description

Sipsynergy is a UK-based, 100% channel-only cloud communications provider delivering Cisco-powered hosted UCaaS, SIP trunking, and Microsoft Teams/Webex calling via resellers and SIs to SMB and enterprise end-customers, now operating within 8x8 following its 2024 acquisition.

Ownership category

akta.pro rank

Product category

Unified Communications as a Service (UCaaS)

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Telecommunications Resellers (517121)

SIC

Services-Telephone Interconnect Systems (7385)

akta.pro primary industry

SIP Trunking & Voice Termination (HDAIAHAC)

akta.pro secondary industry

VoIP Access & ITSP Services (HDAIAHAD)

Keywords

• Cloud telephony
• SIP trunking
• Unified communications
• Hosted PBX
• Channel services

Headquarters

HQ city

Ware

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Monthly Recurring Revenue (Per-User): Sipsynergy generates recurring monthly revenue through per-user licensing fees across its BHC and EHC platforms. Partners purchase at contracted margins and resell to end customers, with the company billing partners who then collect payment from their customers. The company reports 97% renewal rates supporting predictable recurring revenue.
2. SIP Trunking Services: SIP trunking offered on monthly or discounted annual contracts, starting from a single channel. Partners provision trunks for customers through the portal or API with instant provisioning capabilities.
3. Professional Services: Partners can augment recurring revenues with their own professional services for assessment, implementation, and ongoing support. Sipsynergy's PMO team assists and complements partner services as required.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Sipsynergy is a UK-based cloud telephony and SIP trunking provider delivering hosted unified communications (voice, messaging, collaboration) to the channel market. Operating exclusively through resellers, system integrators, ISPs, and distributors, the company resells and white-labels services built on Cisco collaboration technology, enabling partners to provision, manage, and bill end-customer communications services without owning the underlying infrastructure.

Product overview

Sipsynergy offers a unified communications portfolio through three core cloud platforms: Business Hosted Communication (BHC) as its proprietary SMB-focused telephony solution, Enterprise Hosted Collaboration (EHC) powered by Cisco HCS for enterprise deployments, and SIP Trunking for connectivity. All services are managed through the Gateway partner portal. The company has partnered with 8x8 and now offers Callroute as its flagship service, providing Direct Routing for Microsoft Teams and Webex. Optional add-ons include Cisco Jabber, WebEx, and Contact Centre features. Services are delivered via 100% channel-only model to telephony resellers, system integrators, ISPs, and distributors.

Differentiator

Problem solved

Functional benefit

Products and services

• Callroute Flagship hosted UC platform delivering cloud telephony, messaging, and collaboration features to channel partners for resale to UK businesses.
• BHC (Business Hosted Communications) Hosted communications solution aimed at SMB end-customers, delivered via channel partners on Sipsynergy's platform.
• EHC (Enterprise Hosted Communications) Enterprise-grade hosted communications service for larger UK businesses, delivered to channel partners for resale.
• SIP Trunking Wholesale SIP trunking service enabling channel partners to deliver IP-based voice connectivity to business customers, replacing legacy ISDN lines.
• Gateway (Partner Portal) Self-service partner portal used by resellers, SIs, and ISPs to provision, manage, white-label, and bill Sipsynergy's hosted communications services.

Quantifiable outcome

• 11% UK IP telephony and UC market growth in H1 2017
• +3 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature4 records

Partnerships

Six partnerships are on record, tiered flagship and core.

• 8x8flagshipStrategic or Co-development PartnerSipsynergy and Callroute have joined 8x8. This acquisition brings together Callroute's universal orchestration engine with 8x8's sovereign global network and engineering scale. Sipsynergy remains committed to delivering the industry's best Microsoft Teams integration while expanding scope significantly through 8x8's resources. Enterprise Hosted Voice (EHC) will be retired while Business Hosted Voice (BHC) will transition to Callroute's modern AWS-hosted cloud platform.
• CallrouteflagshipStrategic or Co-development PartnerCallroute is Sipsynergy's flagship service built to simplify telephony and connect calling directly into collaboration tools like Microsoft Teams and Webex. All BHC and SIP trunking services are being migrated to Callroute's platform. Callroute's universal orchestration engine combined with 8x8 provides sovereign global network and engineering scale.
• CiscocoreTechnology or IntegrationSipsynergy operates on Cisco Powered platforms including Cisco Hosted Collaboration Service (HCS) with Cisco Flex Plan licensing. The company is one of the few Cisco-powered cloud collaboration platforms in the UK, delivering enterprise-class reliability and performance. All Cisco Powered partner services undergo certification to rigorous standards.
• AWS (Amazon Web Services)coreTechnology or IntegrationCallroute services (and BHC migrating to Callroute) are hosted on AWS cloud infrastructure providing enterprise-grade resilience and GDPR-compliant data storage through Amazon's S3 services.
• MicrosoftcoreTechnology or IntegrationSipsynergy (via Callroute) delivers the industry's best Microsoft Teams integration for Direct Routing and Teams Phone. The partnership aims to deliver a single, integrated solution for Teams Phone, Contact Center, and Direct Routing management.
• Webex (Cisco)coreTechnology or IntegrationCallroute provides Webex Calling integration, enabling businesses committed to Cisco collaboration to migrate into Webex Calling fully integrated through Callroute.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Voiceflex: UK SIP trunking and hosted telephony provider focused on channel partners. Comparable in product focus (SIP trunking, hosted voice), channel-only GTM, and UK geographic concentration.
• VoIP Unlimited: UK wholesale VoIP and SIP trunking provider serving channel partners and resellers. Comparable in SIP trunking focus, channel-led distribution, and UK-only geographic focus.
• 4Com: UK-based hosted telephony, broadband, and IT services provider serving SMBs through direct and partner channels. Comparable in UK market focus, hosted voice product, and SMB customer segment.
• Gamma Communications: UK-headquartered unified communications and SIP trunking provider serving channel partners and direct customers. Highly comparable in geography (UK focus), product portfolio (hosted voice, SIP, UCaaS), and channel-led go-to-market.

Broad incumbents

• Microsoft (Teams Phone): Microsoft Teams Phone is a native cloud telephony capability integrated into Microsoft 365, increasingly offered as the primary voice solution for enterprise customers. Represents both a competitive threat and a partnership opportunity for SIP trunking providers like Sipsynergy.
• RingCentral: Leading global UCaaS provider offering cloud phone, messaging, video, and contact center to businesses of all sizes. Comparable core product (cloud telephony) but operates globally with broader portfolio and direct enterprise sales motion.
• Vonage (Ericsson): UCaaS and CPaaS provider, now part of Ericsson, offering cloud communications APIs and unified communications. Comparable in cloud telephony and SIP trunking offerings, with a global footprint and both direct and channel distribution.
• 8x8: Global UCaaS, CCaaS, and CPaaS provider that has acquired Sipsynergy/Callroute. Comparable product portfolio (cloud telephony, SIP, contact center) but operates at global scale with direct and channel GTM and significantly larger engineering organisation.
• BT (British Telecom): UK incumbent telecommunications provider with enterprise cloud communications and SIP trunking offerings. Comparable in UK-hosted voice and SIP services but vastly larger scale, direct enterprise relationships, and broader portfolio including network infrastructure.

Regional players

• TalkTalk Business: UK business broadband, Ethernet, and hosted communications provider serving SMBs and mid-market. Comparable in UK market focus and SIP/hosted voice offerings, primarily competing through direct sales rather than channel-only model.

Market position

Strengths4 records

Weaknesses1 record

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/sipsynergy
• LinkedInlinkedin.com/company/sipsynergy

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds1 record

Investors1 record

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 Sipsynergy