What DeTeWe does

Ostertag DeTeWe GmbH (trading as DeTeWe) is a German ITK (information and telecommunications technology) system integrator and managed-service provider headquartered in Düsseldorf, founded in 1975. The firm designs, deploys and operates unified-communications and contact-center environments for customers in healthcare, automotive and industry, public administration, financial services and trade, and general enterprise, combining its proprietary YOUC Connect cloud PBX, OD Cloud Contact Center, OD Attendant web switchboard, OD Connect Teams (Microsoft Teams telephony integration) and OD Carrier multi-carrier connectivity platform with managed services and field-service delivery through a nationwide technician network. Strategic partnerships with Zoom Communications, Microsoft (via Luware Platinum status), Mitel, Extreme Networks, Sikom, ecotel and QUMEA anchor both its UC practice and adjacent technology adjacencies including radar-based motion analysis.

The company monetises through four principal streams: recurring subscriptions on YOUC Connect, OD Cloud Contact Center and OD Carrier; managed-service contracts covering monitoring, support and operations; project-based professional services for installation, migration and integration; and hardware resale (endpoints and network equipment). Pricing is anchored to per-seat/per-channel subscription on the proprietary stack and to multi-year managed-services agreements on the outsourcing side. Under Manuel Ferre Hernandez (CEO) and reporting ISO 27001 and GDPR compliance, the firm positions itself as a credible integration partner for German regulated and mid-market tenders, where vendor certification depth and on-shore service coverage matter more than price leadership.

Name

DeTeWe

Legal name

Ostertag DeTeWe GmbH

Website

https://ostertagdetewe.de

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

501–1,000 employees

Short description

DeTeWe is a Düsseldorf-based German ITK system integrator that designs, deploys and manages unified-communications and contact-center solutions, combining its proprietary YOUC Connect cloud PBX and OD Cloud Contact Center with managed services for healthcare, public sector, automotive, financial-services and enterprise customers.

Ownership category

akta.pro rank

Product category

Unified Communications / Cloud Telephony

NAICS

Computer Systems Design and Related Services (54151), Telephone Call Centers (56142), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Telephone Communications (No Radiotelephone) (4813), Services-Computer Integrated Systems Design (7373), Services-Telephone Interconnect Systems (7385)

akta.pro primary industry

Cloud PBX & Hosted Telephony (HDAIAHAB)

akta.pro secondary industry

Collaboration & Unified Communications Management (UCaaS/VoIP) (BPAEABAK)

Keywords

• Unified communications
• Cloud telephony
• Contact center solutions
• Managed IT services
• Microsoft Teams integration

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Cloud Telephony and UC Services: Recurring subscription revenue from cloud-based telephone systems (YOUC Connect) and unified communications services delivered on a per-user or per-feature basis. Services include softphone, smartphone apps, contact center, ACD/IVR, recording, statistics, and CRM/ERP integration.
2. Contact Center Solutions: Revenue from omnichannel contact center solutions including intelligent call distribution (Skill-Based Routing, Database Routing, VIP Routing), predictive dialer, preview calling, CRM integration (SAP, Siebel, Microsoft Dynamics), and flexible deployment (on-site, virtual, private cloud).
3. Managed Services: Ongoing managed services for monitoring, operation, and support of customer IT and telecommunications infrastructure, delivered as scalable, customer-specific services.
4. Professional Services: Consulting, project management, training, workshops, migration and porting services, installation (on-site and remote), and configuration services accompanying product deployments.
5. Carrier / Internet Connectivity: Carrier services including multi-carrier concepts, internet access (xDSL, Leased Line, WLL), SIP trunks, and transmission services providing redundant connectivity solutions.
6. Hardware Sales: Sale of endpoint devices including IP phones, DECT devices, conference phones, and accessories integrated with Mitel and other platforms.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Ostertag DeTeWe is an ITK system integrator and service provider that delivers unified communications, cloud telephony, contact center, and managed network services to enterprise and mid-market organizations in Germany. The company combines its proprietary YOUC Connect cloud PBX platform with integration of Microsoft Teams, Zoom, Mitel, and other UC solutions, offering end-to-end consulting, deployment, and managed services from a single source.

Product overview

Ostertag DeTeWe is an ITK system integrator and service provider offering unified communications and collaboration solutions. The core product is YOUC Connect - a full-featured cloud-based VoIP phone system (Cloud PBX) hosted in German data centers with georedundancy and ISO 27001 certification. The product portfolio is organized around this central platform with multiple add-on modules: OD Cloud Contact Center for omnichannel customer service with intelligent call routing and ACD functionality; OD Attendant as a web-based switchboard console integrated with Microsoft Teams and Outlook; OD Connect Teams for Microsoft Teams telephony integration with four deployment models (SBC, Cloud, Hybrid, Pure); and Sikom AgentOne for advanced Contact Center with AI-powered omnichannel capabilities. The company also offers Zoom platform solutions through a strategic partnership, Mitel UC solutions, network infrastructure and internet access services via OD Carrier, and since September 2025, QUMEA radar-based motion analysis sensors for healthcare facilities. Services include managed services, monitoring, and nationwide technical support.

Differentiator

Problem solved

Functional benefit

Brands

• YOUC Connect: Full VoIP cloud telephone system (virtual PBX) offering 99.9% availability, DSGVO compliance, and flexible integration for businesses of all sizes.
• OD Attendant
• OD Carrier
• OD Cloud Contact Center
• OD Connect Teams

Products and services

• YOUC Connect Full-featured VoIP cloud phone system (Cloud PBX) that integrates seamlessly with existing infrastructure. Offers device-independent user experience with flexible scaling, 99.9% availability, ISO 27001 certification, and unlimited line capacities. Supports softphone, mobile app, conference calls, fax services, contact center, IVR, call recording, statistics, and CRM/ERP integration. Targets enterprises of all sizes; available in Advanced User Plus and Standard User tiers.
• OD Cloud Contact Center Omnichannel contact center solution seamlessly integrated into YOUC Connect Cloud PBX. Features intelligent call distribution by skills (Skill Based Routing), database routing, VIP routing, predictive dialer, preview calling, ACD groups, IVR menus, call recording, full monitoring and reporting. Supports voice, email, chat, WhatsApp, and video consultation. Designed for enterprise customer service operations.
• OD Attendant Web-based switchboard/receptionist console for maximum customer service and efficiency. Features minimal waiting times, customer-relevant data display, intuitive operation, real-time information from Outlook calendar and email systems, queue management, call journals, and reports. Claims 60% time savings compared to other switchboard solutions; serves receptionists and switchboard operators.
• OD Connect Teams Microsoft Teams telephony integration solutions enabling Teams as central platform for internal and external voice communication. Four deployment models: SBC (Session Border Controller, customer-managed), Pure (cloud, OD-managed), Hybrid (with existing PBX), and Cloud (with YOUC Connect). Supports automated implementation and user configuration. Targets enterprises with Microsoft 365 environments.
• OD Carrier Internet Access Internet connectivity solutions including xDSL, leased lines, WLL (wireless local loop), and point-to-point radio connections. Network connection directly to high-performance carrier IP backbone with redundancy concepts, transmission services, hardware, installation management, and customer-specific configuration. Multi-provider architecture for maximum availability and scalable bandwidth.
• Sikom AgentOne Contact Center Platform Contact Center platform from Sikom Software with omnichannel capabilities including Voice, Chat, Video, and Bots. Enables intelligent interface management for seamless deployment of AI tools, creating personalized, efficient, and cross-channel service experiences. Available on-premise, private cloud, and hybrid deployment.
• QUMEA Motion Analysis System Radar-based 3D sensor system for anonymous, contactless movement analysis in nursing facilities and hospitals. Detects critical situations and unusual movement patterns without cameras or wearables, alerting nursing staff in real-time. System already deployed in over 130 institutions in Europe. Focused on fall prevention and patient safety.
• Mitel UC Solutions Mitel unified communications, collaboration, and customer experience technology offerings. Includes business phone systems, collaboration and meeting tools, omnichannel contact center solutions, and SIP/IP phones with digital wireless (DECT) devices. Mitel is described as a worldwide market leader in business communications (#1 UC provider globally, 80M users, 100+ countries).
• Zoom Platform Solutions Zoom communications platform for enterprise collaboration including Zoom Phone, Meetings, Rooms, Workplace/Workflows, Events, Contact Center, and internal communication. 100% cloud or hybrid deployment with Bring Your Own Carrier support, high availability, and global redundancy. DeTeWe serves as a strategic partner providing consultation, integration, and operation of the Zoom platform in Germany.
• OD Managed Services Managed services for IT operations including monitoring, support, and clear responsibilities. Scalable services adapted to customer requirements - from operation and monitoring of IT infrastructure to complete outsourcing of Teams environments. Includes professional services: consulting, project management, training, workshops, migration/porting, installation (on-site and remote), and configuration.

Quantifiable outcome

• 99.9% availability for YOUC Connect cloud telephone system
• +2 more outcomes

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability4 records

Partnerships

Eight partnerships are on record, tiered flagship and core.

• Zoom Communications, Inc.flagshipStrategic or Co-development Partner · 24 February 2026Ostertag DeTeWe and Zoom Communications, Inc. entered into a strategic partnership to redefine the German enterprise collaboration market. Ostertag DeTeWe serves as a strategic partner providing consultation, integration, and operation of the Zoom platform in Germany. The partnership covers Zoom Phone, Meetings, Rooms, Workplace/Workflows, Events, Contact Center, and internal communications.
• LuwarecoreTechnology or IntegrationOstertag DeTeWe holds the Platinum Partner certification in Luware's partner program, representing the highest tier. Luware provides Contact Center solutions for Microsoft Teams (Luware Nimbus), enabling omnichannel customer contact within Microsoft Teams. Both companies share a long-term collaboration and common vision for future customer service, with the partnership focused on intelligent routing, automated call summaries, and AI-assisted agent support.
• Extreme NetworkscoreTechnology or IntegrationOstertag DeTeWe achieved the Excellence Partner status for Extreme Networks, extending their existing certification. The partnership covers modern network solutions including endpoint security, cloud integration, AI/automation for network management, user experience, and compliance/data protection for enterprise customers.
• QUMEAflagshipStrategic or Co-development PartnerOstertag DeTeWe is the first QUMEA partner in Germany, bringing QUMEA's radar-based 3D sensor technology for anonymous, contactless motion analysis to hospitals and nursing homes in Germany. QUMEA's system detects critical situations and unusual movement patterns, informing nursing staff in real time to prevent falls and hazard situations. The system is already deployed in over 130 institutions across Europe.
• Sikom Software GmbHcoreTechnology or IntegrationOstertag DeTeWe deepened its partnership with Sikom Software GmbH to complement its Contact Center portfolio with the Sikom AgentOne platform. The platform enables seamless integration of modern AI tools for personalized, efficient, and omnichannel service experiences. Supports on-premise, private cloud, and hybrid deployment models.
• ecotel communications AGcoreStrategic or Co-development PartnerLong-term partnership between ecotel communications AG and Ostertag DeTeWe focused on providing future-proof telecommunications solutions. The partnership emphasizes trust, shared values, and a clear vision, with Ostertag DeTeWe participating in the ecotel Innovation Runway 2025 event to showcase joint capabilities and innovation.
• MitelcoreTechnology or IntegrationOstertag DeTeWe is a Mitel partner, offering Mitel's unified communications, collaboration, contact center, and phone/device solutions. Mitel is described as a worldwide market leader in business communications (#1 UC provider globally, 80M users, 100+ countries, 5,000+ partners).
• MicrosoftcoreTechnology or IntegrationOstertag DeTeWe is a Microsoft solutions partner offering Microsoft Teams telephony integration through its OD Connect Teams portfolio (SBC, Cloud, Hybrid, Pure models). The company also offers Microsoft 365 integration, Teams Direct Routing, and OD Managed Teams services for enterprise Teams environments.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• T-Systems (Deutsche Telekom): T-Systems is Deutsche Telekom's enterprise ICT arm, offering large-scale UC, networking, and managed services to German enterprises and public-sector buyers — a broader incumbent operating in the same telecom/IT services space with significantly greater scale.
• NTT Data Deutschland: NTT Data is a global IT services provider with a significant German business delivering UC, cloud, and managed services to enterprise and public-sector customers — a broad incumbent operating in the same integration and managed services space.
• Atos (Eviden): Atos/Eviden is a global IT services and digital transformation provider with significant DACH operations, offering UC, collaboration, networking, and managed services to enterprise and public-sector customers — a broad incumbent overlapping in integration and managed services.

Emerging players

• easybell GmbH: easybell is a Berlin-based VoIP and cloud telephony provider serving German SMEs with SIP trunks, Cloud PBX, and UC services — an emerging German competitor with overlapping product offerings (SIP trunking, hosted telephony) but focused on smaller customers.

Direct peers

• Computacenter plc: Computacenter is a leading European IT infrastructure and services provider with strong German operations, delivering UC, networking, and managed services to enterprise customers — directly comparable as a UK/German-headquartered integrator with a similar mix of vendor partnerships and managed services.
• Allgeier SE: Allgeier is a German-listed IT services group providing UC, enterprise software, and managed services to mid-market and enterprise customers in DACH — a direct peer as a comparable German-headquartered IT services and integration provider with similar vertical and vendor-mix profile.
• NFON AG: NFON is a Munich-based European Cloud PBX/UCaaS provider offering cloud telephony and contact center solutions to SMEs and mid-market — directly comparable as a German-headquartered competitor in Cloud PBX (NFON Cloud PBX vs YOUC Connect).
• Avanade Inc. Avanade is a Microsoft-focused joint venture delivering UC, Teams, and modern workplace services globally with strong DACH presence — directly comparable as a Microsoft-centric systems integrator delivering Teams telephony and managed services similar to OD Connect Teams and OD Managed Teams.
• Bechtle AG: Bechtle is one of Germany's largest IT system integrators and managed service providers, offering UC, networking, and cloud services to mid-market and enterprise customers across Germany and Europe — directly comparable to Ostertag DeTeWe's integration, managed services, and vendor-neutral UC model.

Others

• Luware AG: Luware is a Swiss-based Contact Center software vendor for Microsoft Teams (Luware Nimbus), with whom Ostertag DeTeWe holds Platinum Partner status — a partner/adjacent technology provider rather than a competitor, but its Intelligent Routing and AI features directly compete with OD Cloud Contact Center when sold through other partners.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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• Facebookfacebook.com/ostertagdetewe
• LinkedInlinkedin.com/company/26069
• Instagraminstagram.com/ostertagdetewe

Compliance1 record

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 DeTeWe