What C4B Com for Business does

C4B Com for Business AG is a privately held German unified communications and collaboration (UCC) software vendor headquartered in Germering near Munich. Founded in 1998 and operating as a German stock corporation (AG) under Executive Board member Michael Welz and Supervisory Board Chairman Dr. Peter Jochum, the company has built the XPhone Connect platform over more than 25 years and reports more than one million installed licenses across approximately 10,000 enterprises, municipalities, and public-sector organizations. Its customer base is concentrated in the DACH region and spans public administration, healthcare, logistics, manufacturing, automotive, banking, and energy utilities.

XPhone Connect is a modular UCC suite built on Microsoft Windows Server infrastructure, delivering telephony, softphone (VoIP), intelligent presence management, hotline management (TeamDesk), mobile app, online meetings with bidirectional screen sharing and active noise suppression, integrated BI analytics, and AI-powered call recording and transcription. The platform is positioned as vendor-independent, integrating with Cisco, Mitel, and Alcatel-Lucent PBX systems, Session Border Controllers, and the Microsoft ecosystem (Teams, Outlook, Microsoft 365, Dynamics), alongside Salesforce, SAP R/3, HCL Notes, and DATEV. Cross-platform interoperability is delivered through the MicSync feature for Zoom and Webex. Deployment models span on-premises perpetual licensing, on-premises subscription, hybrid, and cloud, with the Contacts by XPhone cloud application for Microsoft Teams representing the newest recurring-revenue SKU.

The business model combines software license sales (perpetual and subscription), the XPhone Up2Date software assurance service, cloud subscription add-ons (Contacts by XPhone, priced per called number per month), and professional services for needs analysis, integration, and support. All commercial sales are routed exclusively through a certified partner network of IT service providers, system integrators, and resellers, with no direct enterprise sales motion beyond free consultation appointments. Pricing is quote-based and not publicly disclosed, and the company is bootstrapped with no disclosed funding rounds, M&A activity, or external investors.

Name

C4B Com for Business

Legal name

C4B Com For Business AG

Website

https://c4b.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

51–100 employees

Short description

C4B Com for Business AG is a German unified communications software vendor that develops and sells XPhone Connect, a vendor-independent UCC platform serving approximately 10,000 enterprises and public-sector organizations across the DACH region in verticals including public administration, healthcare, logistics, manufacturing, and banking.

Ownership category

akta.pro rank

Product category

Unified Communications & Collaboration (UCC) Software

NAICS

Software Publishers (5132), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518210), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)

SIC

Telephone Communications (No Radiotelephone) (4813), Services-Telephone Interconnect Systems (7385), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

UCaaS Platforms & Suites (HDAIAHAA)

akta.pro secondary industries

Unified Communications (UCaaS) Apps (BPAMACAE), Unified Communications & Contact Center for Workplace (UCaaS/VoIP, Meeting Rooms) (BPAEAIAE), Business Messaging & Team Collaboration (HDAIAHAE)

Keywords

• Unified communications software
• Business telephony platform
• VoIP softphone solutions
• PBX integration software
• Microsoft Teams integration

Headquarters

HQ city

Germering

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. XPhone Connect Software Licenses: The company offers both on-premises perpetual license and subscription (cloud/abonnement) models for XPhone Connect software. Perpetual licenses provide unlimited usage rights after one-time payment, while subscription models provide usage rights for the duration of the contract period.
2. XPhone Up2Date Services: Software assurance and update services providing ongoing maintenance, software updates, and upgrades. Part of warranty for cloud software and subscription models, or separately contracted for on-premises perpetual licenses.
3. Contacts by XPhone Cloud Software: Cloud-based contact directory and caller identification subscription service licensed per called number (Called Party ID) for each calendar month of active use.
4. Professional Services: Consulting and implementation services including needs analysis, installation, integration with business applications (Salesforce, Microsoft Dynamics), and ongoing support.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

C4B develops and sells XPhone Connect, a Unified Communications and Collaboration (UCC) software platform that unifies telephony, presence management, softphone, mobile app, chat, screen sharing, online meetings, hotline management, call analytics, and CTI integration with business applications. It is sold as on-premises perpetual licenses, subscriptions, or hybrid deployments through a certified partner network, primarily to mid-market and enterprise customers in the DACH region and Europe.

Product overview

C4B Com for Business offers XPhone Connect, a modular unified communications and collaboration (UCC) platform developed in Germany. The core product XPhone Connect provides telephony, presence management, softphone, mobile app, chat, screen sharing, online meetings, hotline management (TeamDesk), and Business Intelligence Analytics. The portfolio includes the Software Assurance add-on XPhone Up2Date, the cloud-based Contacts by XPhone application for Microsoft Teams, and the XPhone Connect Directory server component. The platform integrates with Microsoft Teams, Zoom, Webex, various PBX systems (Cisco, Mitel, Alcatel-Lucent), CRM systems (Salesforce, Microsoft Dynamics), ERP systems (SAP R/3), and supports on-premises, private cloud, and hybrid deployment. Over one million XPhone licenses are installed across approximately 10,000 organizations.

Differentiator

Problem solved

Functional benefit

Brands

• XPhone Connect: Unified Communications & Collaboration (UCC) software for enterprises enabling telephony, presence management, CTI, softphone, mobile app, and hotline management.
• XPhone Up2Date
• Contacts by XPhone
• TeamDesk
• XPhone Connect Directory

Products and services

• XPhone Connect Unified Communications and Collaboration (UCC) software platform combining telephony, presence management, softphone, mobile app, chat, screen sharing, online meetings, hotline management (TeamDesk), call analytics, and CRM/ERP integration, sold to enterprises via certified partners with on-premises, private cloud, or hybrid deployment.
• XPhone Up2Date Software Assurance program providing regular updates, upgrades, and technical support for XPhone Connect, required for continued use of parts, modules, and licenses after initial purchase of on-premises upgrades or bundled with subscription models.
• Contacts by XPhone Cloud-based caller identification and contact lookup application for Microsoft Teams using an LDAP interface for reverse number lookup via third-party session border controllers; licensed per called number (Called Party ID) per calendar month of active use.
• XPhone Connect Directory Server component for centralized contact directory included with the Contacts by XPhone subscription, providing unified contact search across multiple data sources including ERP, CRM, and Outlook for XPhone Connect deployments.
• TeamDesk Integrated hotline management and call center capability within XPhone Connect providing intelligent multi-site availability management, automatic call distribution, agent login including remote access, and Business Intelligence Analytics for optimizing customer reachability.
• XPhone Connect Mobile App Mobile application for smartphones providing full telephone functionality, chat, contacts access, and meeting launching under the user's professional number via softphone over Wi-Fi or mobile networks, supporting hybrid and mobile workers.
• XPhone TAPI Server TAPI Service Provider (TSP) enabling telephony integration via the standard TAPI interface for third-party applications connecting XPhone Connect with desktop and business software environments.
• XPhone Connect Professional Services Consulting, implementation, and integration services for XPhone Connect deployments, covering needs analysis, installation, integration with business applications (Salesforce, Microsoft Dynamics), and ongoing support, typically delivered by certified partners.
• UCaaS for Service Providers Wholesale unified communications offering that enables telecommunications service providers and resellers to deliver UCaaS services to their own end customers using XPhone Connect as the underlying platform.

Quantifiable outcome

• Over 1 million XPhone licenses installed worldwide
• +5 more outcomes

Named customers16 records

Segments10 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration15 records

AI capability3 records

Feature12 records

Partnerships

Six partnerships are on record, tiered core.

• MicrosoftcoreTechnology or IntegrationDeep integration partnership with Microsoft for XPhone Connect's compatibility with Microsoft Teams (presence synchronization, federation), Outlook (plug-in integration), Microsoft 365 (M365 contacts), and Microsoft Dynamics (CRM integration). Also uses Microsoft Windows Server as core platform.
• ZoomcoreTechnology or IntegrationMicSync feature enables automatic synchronization between XPhone and Zoom, allowing seamless collaboration across platforms.
• WebexcoreTechnology or IntegrationMicSync feature enables automatic synchronization between XPhone and Webex, similar to Zoom integration.
• CiscocoreTechnology or IntegrationXPhone is compatible with Cisco PBX systems and session border controllers as part of vendor-independent approach.
• MitelcoreTechnology or IntegrationXPhone is compatible with Mitel PBX systems including MiVoice 5000 (validated in December 2023).
• Alcatel-LucentcoreTechnology or IntegrationXPhone is compatible with Alcatel-Lucent PBX systems as part of vendor-independent approach.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• NFON: German cloud PBX and UCaaS provider targeting SMBs and mid-market via channel partners. Directly comparable DACH-focused UC vendor with similar partner-led distribution model, though NFON is cloud-only while C4B retains on-prem capability.
• 3CX: International UC software vendor offering on-premises and cloud PBX with broad third-party integrations and channel sales. Direct peer as a partner-distributed UC software platform with comparable feature breadth.
• STARFACE: German UCC/UCaaS vendor (now under Deutsche Telekom/Enreach umbrella) selling hybrid PBX and UC software through certified partners. Closest direct competitor in the DACH mid-market with overlapping customer verticals and partner-led GTM.
• Swyx (Enreach): German-origin UC software vendor now part of Enreach, focused on SMB/mid-market with partner channel. Competes head-to-head with XPhone Connect in DACH for hybrid communications and Teams integration.

Broad incumbents

• Avaya: Global incumbent in enterprise telephony and UC, including Avaya IP Office and OneCloud UCaaS. Competes indirectly via PBX refresh decisions where XPhone often layers on top of, or against, Avaya deployments.
• RingCentral: Public UCaaS leader offering cloud-native voice, video, and contact center. Competes in the same mid-market and enterprise UC RFPs, particularly against XPhone Connect's cloud and Teams-integrated offerings.
• Microsoft Teams Phone: Native Teams telephony offering that increasingly absorbs UCaaS workloads and is also C4B's deepest integration partner. Represents the central competitive threat and ecosystem anchor for XPhone Connect.
• Mitel: Global UC and PBX vendor whose MiVoice and MiVoice 5000 systems are validated as interoperable with XPhone Connect. Dual role as a technology partner and an indirect competitor for UC budgets in enterprise accounts.
• Cisco Webex: Global UCaaS suite from Cisco, integrated with Cisco PBX and collaboration portfolio. Competes in enterprise UC RFPs and is both a partner (via Cisco PBX interoperability) and a competitor for full-stack UC deals.

Regional players

• Deutsche Telefon Standard: German cloud telephony/UCaaS provider focused on SMBs with strong direct and indirect sales in Germany. Comparable DACH-focused channel model and Made-in-Germany positioning.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/c4b-com-for-business-ag

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 C4B Com for Business