What Siemens Enterprise Communications does

Siemens Enterprise Communications is a privately held enterprise communications provider founded in 2006 as a joint venture between Siemens AG and The Gores Group. The company was acquired by Mitel Networks Corp. in 2016 and now operates as a wholly-owned subsidiary under the retained Unify brand, headquartered in Bezons, France, with 10,000+ employees.

Under the Unify brand, the company develops and supports the OpenScape unified communications portfolio — including OpenScape UC (unified voice, messaging, video), OpenScape Voice (VoIP), OpenScape 4000 (large-scale enterprise telephony), OpenScape Business (mid-market integrated communications), and the Unify Phone SIP device family. It also delivers mission-critical solutions such as OpenScape Alarm Response, Virtual Care Collaboration Service, and Critical Event Management, alongside the on-site MiVoice MX-ONE system.

Commercially, the company monetizes through software/subscription licensing, hardware sales (IP/SIP/DECT phones, conference phones), professional services (Advise, Transform, Operate, Optimize), managed services, and Software Assurance programs. Go-to-market combines direct enterprise field sales with a 6,000+ partner network across healthcare, education, financial services, manufacturing, hospitality, government, and retail segments, supported by hybrid deployment flexibility (cloud, on-premises, or mixed). As of 2026, the combined Mitel/Unify portfolio serves 70M+ users globally and holds 2,100 patents.

Name

Siemens Enterprise Communications

Legal name

Siemens Enterprise Communications GmbH & Co. KG

Website

https://unify.com

Company type

Private

Founded year

2006

Operating status

Acquired

Headcount range

5,001–10,000 employees

Short description

Siemens Enterprise Communications, operating as Unify, is an enterprise unified communications provider acquired by Mitel in 2016. It develops the OpenScape UC, OpenScape Voice, OpenScape 4000, OpenScape Business, and Unify Phone product lines for large enterprises and mission-critical environments.

Ownership category

akta.pro rank

Product category

Enterprise Unified Communications

NAICS

Custom Computer Programming Services (541511), Software Publishers (51321), Telephone Apparatus Manufacturing (334210)

SIC

Services-Computer Integrated Systems Design (7373), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Enterprise Integration, iPaaS & Middleware Services (API/EDI) (BPAEAGAH)

akta.pro secondary industry

General Customer Service & Contact Center Operations (BPAAAAAA)

Keywords

• Unified communications
• Enterprise telephony
• Contact center solutions
• Voice over IP
• Mission-critical communications

Headquarters

HQ city

Bezons

HQ country

France

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software/Subscription Licensing: Recurring subscription revenue from unified communications platforms including MiCollab, MiVoice Business, and OpenScape UC solutions deployed via cloud, hybrid, or on-premises models
2. Hardware Sales: IP phones, conference phones, DECT solutions, and SIP devices for business communications infrastructure
3. Professional Services: Implementation, deployment, migration, and consulting services including Advise, Transform, and Optimize service offerings
4. Managed Services: Ongoing operational support and managed services for cloud and hybrid communication environments
5. Software Assurance: Maintenance, updates, and support services through Mitel Software Assurance program

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

Siemens Enterprise Communications (operating under the Unify brand) provides enterprise unified communications solutions including voice platforms, mission-critical communications, contact center applications, data networks, and communication services. Its core portfolio centers on the OpenScape family of products (OpenScape UC, OpenScape Voice, OpenScape 4000, OpenScape Business) and the Unify Phone SIP device portfolio, sold primarily to enterprises and mid-market organizations across healthcare, government, financial services, manufacturing, hospitality, and education verticals.

Product overview

Mitel offers a comprehensive unified communications and collaboration platform architecture consisting of multiple core communication platforms (MiVoice Business, OpenScape UC, OpenScape Voice, OpenScape 4000, MiVoice MX-ONE, OpenScape Business) supported by collaboration software (MiCollab), advanced customer experience solutions (Mitel CX, MiContact Center Enterprise, Mitel Workforce Optimization, Mitel Workflow Studio), and a broad portfolio of devices (IP phones, SIP phones, DECT solutions, conference phones, OpenScape Desk Phone CP Series). The portfolio also includes critical communications solutions (Mitel Xpert, Revolution, Critical Event Management, Virtual Care Collaboration Service, OpenScape Alarm Response) and secure cloud offerings (Mitel Secure Cloud). Professional services (Advise, Transform, Operate, Optimize) and Software Assurance support the complete solution lifecycle. The platform supports hybrid deployment flexibility with cloud, on-premises, and mixed configurations, and integrates with Microsoft Teams and Zoom.

Differentiator

Problem solved

Functional benefit

Brands

• OpenScape UC: Unified communications platform providing voice, messaging, video, and collaboration features for enterprise environments
• OpenScape Voice
• OpenScape 4000
• OpenScape Business
• Unify Phone
• OpenScape Alarm Response
• MiVoice MX-ONE

Quantifiable outcome

• 75% carrier cost reduction for City of Baltimore
• +4 more outcomes

Named customers8 records

Segments9 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability5 records

Feature10 records

Partnerships

One partnership is on record.

• ZoomcoreTechnology or IntegrationMitel offers Zoom Hybrid Workplace solutions, integrating Mitel's communication infrastructure with Zoom's collaboration platform for enhanced hybrid work capabilities

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Cisco (Webex): Cisco/Webex delivers enterprise unified communications, calling, meeting, and contact center solutions across cloud and on-prem deployments — overlapping directly with MiVoice Business, OpenScape UC, and MiContact Center Enterprise in mid-market and large enterprises.
• RingCentral: RingCentral offers cloud-native UCaaS and contact center (RingCX) targeting SMB through enterprise — directly comparable cloud delivery model to Mitel's hybrid and Mitel Secure Cloud offerings.
• Zoom: Zoom Phone and Zoom Workplace target the same unified communications and contact center workloads; Mitel has an official Zoom Hybrid Workplace solution, positioning them as directly comparable voice/UC vendors with overlapping enterprise customers.
• Avaya: Avaya provides enterprise telephony, UC, and contact center platforms (Aura, Experience Platform) with strong installed bases in large enterprises and government — directly competing with OpenScape and MiVoice in similar verticals.
• Genesys: Genesys Cloud CX is a leading enterprise contact center platform with AI-driven routing and workforce engagement, directly comparable to MiContact Center Enterprise, Mitel CX, and Mitel Workforce Optimization.
• Alcatel-Lucent Enterprise: ALE provides enterprise communications (OmniPCX, Rainbow UC) and networking targeting similar large enterprise and government buyers — directly comparable to OpenScape Voice and OpenScape UC offerings.
• 8x8: 8x8 provides cloud UC, contact center, and CPaaS solutions targeting enterprise and mid-market — competing in the same hybrid cloud UCC space as Mitel/Unify, including regulated verticals.
• Five9: Five9 is a pure-play cloud contact center vendor with AI-powered CX tools that directly overlap with Mitel CX, MiContact Center Enterprise, and AI-assisted contact center capabilities.
• NEC (UNIVERGE): NEC UNIVERGE provides enterprise UC, contact center, and IP telephony serving large enterprises and public sector — directly overlapping with OpenScape 4000, MiVoice MX-ONE, and MiContact Center in regulated and vertical use cases.

Broad incumbents

• Microsoft (Teams): Microsoft Teams plus Operator Connect and Teams Phone Mobile compete head-on in enterprise voice and collaboration, and Mitel officially integrates with Teams — making Microsoft both a direct competitor and integration partner across the same enterprise buyer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/AtosUnify
• Facebookfacebook.com/AtosUnify
• LinkedInlinkedin.com/company/unifyco

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 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 Siemens Enterprise Communications