STEL

What STEL does

STEL (StelGruppe GmbH) is a Germany-based telecommunications infrastructure services provider headquartered in Münster-Wolbeck. The company delivers turnkey telecom projects for telecommunications operators and enterprise clients, covering the full value chain from initial surveying and feasibility analysis through civil engineering, end-customer connection, and 24/7 network maintenance. Its service portfolio is technology-agnostic, spanning fiber optic (Glasfaser), copper (Kupfer), and coaxial (Koaxial) cable networks as well as mobile network technologies including 3G, 4G, and 5G, with a dedicated IT & IoT solutions offering for custom technology implementations.

The company's technical capabilities include horizontal directional drilling (Horizontalbohrung) for civil engineering deployment, preventive and corrective network maintenance, and continuous 24/7 network monitoring. STEL positions itself as a single-vendor alternative to fragmented specialist contractors, leveraging a team with more than 20 years of combined telecommunications industry experience, although the corporate entity itself was established relatively recently.

Commercially, STEL operates a sales-led B2B go-to-market, engaging telecom operators directly through project consultation, phone outreach, and contact forms. Revenue is generated on a professional services basis through project-based contracts, supplemented by recurring maintenance agreements. The company is privately held by its three managing directors (Sérgio Monteiro, Frank Richter, and José Rodrigues), with no external investors, parent company, or funding rounds disclosed in the available data. The company claims both national and international operational reach, supported by an advisory board member focused on international business development.

Name

STEL

Legal name

StelGruppe GmbH

Website

https://stelgruppe.de

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

51–100 employees

Short description

STEL (StelGruppe GmbH) is a German telecommunications infrastructure services company providing turnkey fiber, copper, coaxial, and mobile network (3G/4G/5G) solutions. It serves telecom operators and enterprises with planning, civil engineering, field services, 24/7 maintenance, and IT/IoT solutions from Münster-Wolbeck.

Ownership category

akta.pro rank

Product category

Telecommunications Infrastructure Services

NAICS

Power and Communication Line and Related Structures Construction (237130), Utility System Construction (2371)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Cable Installation & Construction Services (trenching, duct banks, HDD, pulling, cable laying) (EUADADAI)

Keywords

• Telecommunications infrastructure services
• Fiber optic network deployment
• Mobile network construction
• Civil engineering telecom
• Network maintenance monitoring

Headquarters

HQ city

Münster

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Marketing or Sales

Revenue model

1. Telecommunications Infrastructure Services: STEL generates revenue through providing comprehensive telecommunications infrastructure services including planning, civil engineering, field service, and maintenance. The company operates on a project-based and recurring service model, delivering turnkey solutions from initial surveying through to end-customer connection, with ongoing 24/7 maintenance contracts generating recurring revenue.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

STEL provides turnkey telecommunications infrastructure services covering the entire value chain — from surveying, planning and civil engineering (including trench excavation and horizontal directional drilling) through field installation of fiber optic, copper and coaxial networks, to mobile network (3G/4G/5G) site construction and optimization, plus preventive/corrective maintenance with 24/7 monitoring. The company also delivers custom IT and IoT solutions for telecom operators and enterprise clients on national and international projects.

Product overview

STEL is a telecommunications infrastructure services company offering a modular and integrated service portfolio covering the entire value chain from planning to maintenance. The company provides six interconnected service offerings: Planning and Design (Planung und Entwurf) for feasibility analysis and project design; Civil Engineering (Bauingenieurwesen) for construction including trenching and horizontal drilling; Field Services (Außendienst) for fiber, copper, and coaxial cable work at all network levels; Maintenance and Monitoring (Wartung und Überwachung) with 24/7 support; Mobile Networks (Mobile Netze) for 3G/4G/5G site construction and optimization; and IT & IoT solutions for custom technology implementations. The company operates nationally and internationally, serving telecommunications operators and enterprises with turnkey project capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Planning and Design (Planung und Entwurf) Telecommunications infrastructure planning service covering inventory assessment, feasibility analysis, permit processing, and final project design for national and international projects. Targeted at telecom operators and enterprises planning network rollout.
• Civil Engineering (Bauingenieurwesen) Civil engineering services for telecommunications projects including trench excavation and horizontal directional drilling (Horizontalbohrung), executing projects from start to finish for telecom operators.
• Field Services (Außendienst) Technical field services for fiber optic (Glasfaser), copper (Kupfer) and coaxial (Koaxial) cable installation and maintenance at all network levels and infrastructure types for telecom operators.
• Maintenance and Monitoring (Wartung und Überwachung) Preventive and corrective maintenance services for existing telecommunications networks with 24/7 monitoring capabilities to ensure network reliability for telecom operators.
• Mobile Networks (Mobile Netze) Mobile network services including construction of new sites, maintenance and equipment replacement for 3G/4G/5G technologies, plus network design and optimization for mobile operators.
• IT & IoT Solutions Custom IT and Internet of Things solutions implementing innovative and tailored technologies to maximize return on investment for telecommunications operators and enterprise clients.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators1 record

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Leonhard Weiss GmbH & Co. KG: Large German construction group with a telecom infrastructure division covering civil works, cable laying, and network construction. Comparable in civil engineering capability and geographic presence, though significantly larger and more diversified.
• Deutsche Telekom Technik GmbH: In-house network build and maintenance arm of Deutsche Telekom, the dominant German carrier. While not a commercial competitor in the same way, it sets the benchmark for scale, capability, and customer relationships in STEL's primary market.
• STRABAG AG: Major European construction group with telecom infrastructure capabilities including trenching, cable installation, and network construction. Comparable in heavy civil engineering service line, though telecom is one of many segments.
• PORR AG: Austrian-headquartered construction group with telecom infrastructure capabilities across DACH. Comparable in trenching, cable laying, and civil works service line, with broader geographic and construction segment exposure.

Direct peers

• Balfour Beatty (Telecom Division): UK-listed infrastructure group with a substantial telecom services division delivering fiber and mobile network design, build, and maintenance to carriers. Comparable in turnkey delivery model and recurring maintenance revenue stream.
• Circet Group: Europe's largest telecom infrastructure services provider, offering turnkey fiber, mobile, and maintenance services to carriers. Directly comparable to STEL in scope (planning → civil works → maintenance) and customer base (telecom operators).
• UNITEL Montage GmbH: German telecom infrastructure contractor delivering fiber optic, copper, and mobile network construction and maintenance. Closely comparable in geography, technology stack, and service offering to STEL.
• FTG Fernmeldetechnik GmbH: Germany-based telecom field services and network construction firm specializing in fiber, copper, and mobile site build-outs. Comparable in size, geographic focus, and integrated civil-engineering-plus-field-service model.

Regional players

• NetCologne Gesellschaft für Telekommunikation mbH: Regional German telecom operator and network owner in the Cologne/Bonn area that also performs in-house infrastructure deployment and maintenance. Comparable in network operations and regional fiber roll-out activity, though primarily a customer/operator rather than pure services firm.

Emerging players

• Glasfaser Deutschland GmbH: Focused German fiber-optic network roll-out specialist with municipal and regional carrier projects. Comparable in fiber civil engineering focus but narrower in technology scope than STEL's multi-technology offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/stel-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 STEL