ISS

What ISS does

ISS GmbH Strempel & Strempel is a Munich-based, family-owned IT services provider founded in 1985 and now in its second generation of leadership. The company delivers managed IT services, consulting, and implementation primarily to the German housing industry (Wohnungswirtschaft) — housing cooperatives and property managers — and secondarily to mid-sized enterprises (Mittelstand) in sectors including education, healthcare, real estate, and the public sector. ISS claims to serve over 250 companies, including more than 150 housing industry clients, with several customer relationships exceeding 15–20 years.

The product portfolio is built on a Microsoft-centric technology stack (Microsoft 365, Azure, Windows Server, Remote Desktop Services, Exchange) complemented by security tooling from Acronis, Avast, G DATA, and WatchGuard, and remote management via TeamViewer. Beyond generic IT operations, ISS has developed proprietary, vertical-specific offerings for housing companies: a DSGVO Compliance Tool (DCT) integrated with Microsoft Teams, a Digital Board (Digitales Brett) communication system, IP surveillance cameras, remotely-readable smoke detectors, hygrometers, and related electrical and renovation services. The company also delivers pen testing, cybersecurity training (10 chapters / 41 lessons), web design for housing firms, and digitalization/AI implementation services.

ISS generates revenue through three primary streams: recurring managed services billed as monthly IT-Flatrates with SLAs, project-based IT consulting and implementation, and one-time hardware/software resale. An additional recurring stream comes from legally mandated annual smoke detector maintenance. The go-to-market is direct enterprise sales targeting Geschäftsführer, Vorstand, and IT-Leiter decision makers, with a complimentary 15-minute IT and Cyber-Security Check (booked via HubSpot) as the primary lead generation mechanism. Operations are concentrated in Bavaria/Munich with a few cross-border engagements into Switzerland, and customer engagement is delivered both remotely and on-site.

Name

ISS

Legal name

ISS GmbH Strempel & Strempel

Website

https://iss-gmbh.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

11–50 employees

Short description

ISS GmbH is a Munich-based, second-generation family-owned IT services provider founded in 1985, delivering managed IT, cybersecurity, and GDPR-compliance solutions primarily to German housing cooperatives (150+ clients) and mid-sized enterprises.

Ownership category

akta.pro rank

Product category

Managed IT Services

NAICS

Computer Systems Design Services (541512), Computer Systems Design and Related Services (54151), Computer Facilities Management Services (541513)

SIC

Services-Computer Integrated Systems Design (7373), Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Programming Services (7371)

akta.pro primary industry

ITIL/ITSM Process Consulting & Implementation (BPAEAJAB)

akta.pro secondary industries

ITSM Platform Implementation & Administration (ServiceNow/JSM/BMC/etc.) (BPAEAJAC), IT Service Management (ITSM) Platforms (HDAEALAA), IT Operations Management (ITOM) Platforms (HDAEALAC)

Keywords

• Managed IT services
• IT security consulting
• GDPR compliance services
• Housing industry IT
• Cloud infrastructure services

Headquarters

HQ city

München

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Managed Services / IT Flatrates: Monthly retainer-based IT management services with Service Level Agreements. Provides comprehensive IT infrastructure monitoring, maintenance, security, and support. Includes IT-Flatrate model with transparent, predictable costs.
2. IT Consulting: Strategic IT consulting including technology planning, IT audits, digitalization strategy, and implementation support. Billed as project-based or hourly consulting engagements.
3. Hardware and Software Sales: Sale and installation of IT hardware (PCs, servers, notebooks, tablets) and software solutions. One-time purchase model with potential ongoing support contracts.
4. Rauchwarnmelder (Smoke Detector) Services: Installation, maintenance, and remote reading services for smoke detectors in residential properties. Includes annual maintenance as required by law.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

ISS GmbH provides comprehensive managed IT services for German mid-sized companies and the housing industry (Wohnungswirtschaft). Core offerings include IT consulting, IT security, network administration, cloud computing, Microsoft 365 implementation, and managed service contracts (IT-Flatrate with SLAs). The company also delivers specialized housing-industry solutions such as the proprietary DSGVO Management Tool (GDPR compliance), digital notice boards, smoke detectors, and IP surveillance systems.

Product overview

ISS GmbH (Strempel & Strempel) is an IT services company founded in 1985, operating as a second-generation family-owned business. The company offers a comprehensive portfolio of managed IT services primarily focused on the German housing industry (Wohnungswirtschaft). The core offering consists of IT consulting, IT security, network administration, cloud computing, and managed services. The product portfolio includes both core IT services (IT-Beratung, IT-Sicherheit, IT-Rechtskonformität, Netzwerkverwaltung, Cloud Computing, Managed Services, VoIP, web design, virtualization, mail services) and specialized add-on modules for the housing sector (DSGVO Management Tool, Das Digitale Brett digital boards, IP surveillance cameras, smoke detectors, hygrometers). The company also provides AI-powered digitalization services and the DSGVO Management Tool which integrates with Microsoft Teams. Additional services include cybersecurity training, renovations, and electrical engineering for residential properties. The company serves over 250 companies including 150+ housing cooperatives.

Differentiator

Problem solved

Functional benefit

Products and services

• IT-Beratung (IT Consulting) Strategic IT consulting and technology planning including IT strategy development, IT audits, and implementation of legal IT requirements for compliance. Targeted at business decision-makers (Geschäftsführer, Vorstand, IT-Leiter).
• Datenschutzberatung (Data Protection Consulting) Practical GDPR (DSGVO) implementation consulting to help businesses comply with legal data protection requirements, including employee training on data protection and proper handling of customer data.
• IT-Sicherheit (IT Security) Comprehensive cybersecurity services including firewall and antivirus implementation, anti-spam solutions, endpoint protection, penetration testing, security training, and threat response. Targeted at companies needing to meet GDPR/DSGVO and cyber insurance requirements.
• IT-Rechtskonformität (IT Legal Compliance) Legal IT compliance services ensuring operations meet statutory requirements, particularly GDPR (DSGVO) compliance including Article 32 implementation, security audits, and data protection management.
• Netzwerkverwaltung (Network Administration) Network management and administration including server management, VPN setup, printer management, WLAN systems, and network security implementation and monitoring.
• Cloud Computing Cloud computing solutions including cloud infrastructure management (Microsoft Azure), provision and management of cloud-based applications and services, and cloud migration and optimization.
• Wartungsverträge und Managed Services Managed services and maintenance contracts providing comprehensive IT system support including predictable costs, reliable support, proactive maintenance and updates, 24/7 support, and customized IT solutions delivered via the IT-Flatrate model with SLA.
• Hard- & Software (Hardware & Software) Hardware and software solutions including PCs, servers, notebooks, and tablets with expert consultation for selecting and configuring optimal tools for business objectives.
• Microsoft 365 Microsoft 365 consulting and implementation services including central communication, project collaboration, file sharing and co-editing via SharePoint, and third-party tool integration for seamless workflows.
• Digitalisierung & KI (Digitalization & AI) Digital transformation and AI implementation services enabling process automation, customer experience personalization, and faster response to changes. Includes intelligent systems for real-time data analysis and interpretation.
• DSGVO Management Tool (DCT) Proprietary GDPR compliance management tool integrated with Microsoft Teams, specifically developed for the housing industry. Provides all-in-one data protection and security with automated documentation for GDPR/DSGVO and TOM requirements including processing registers, deletion concepts, data protection policies, and processing activity records.
• Das Digitale Brett (Digital Board) Digital information boards for building communication, replacing traditional bulletin boards with centrally controlled, always-up-to-date content. Features include targeted messaging by building entrance, paperless operation, and legally compliant documentation of activities. Targeted at housing cooperatives and property managers.
• Rauchwarnmelder (Smoke Detectors) Smoke alarm systems with professional installation, complete documentation, and legally required annual maintenance including remote reading capabilities for housing cooperatives. Targeted at residential property managers.
• IP-Überwachungskameras (IP Surveillance Cameras) IP surveillance cameras for 24/7 monitoring of office buildings and construction sites, featuring GDPR-compliant installation, remote maintenance, software updates, cybersecurity protection, and potential insurance premium reduction.
• IP-Telefonanlagen (IP Telephone Systems) VoIP telephone systems using internet for voice communication, offering improved audio quality, reliability, and extended features like voicemail-to-email, call forwarding, automatic call distribution, and conference calling.
• Webdesign (Web Design) Custom web design solutions for companies including website redesign, corporate identity (CI) updates, responsive design, SEO optimization, and GDPR-compliant implementation with privacy policies and SSL certificates. Targeted at housing companies and Mid-Market clients.
• PEN-Testing (Penetration Testing) Penetration testing services to identify vulnerabilities and security gaps in IT infrastructure before attackers can exploit them. Includes network, web applications, mobile devices, and cloud environment testing with detailed reports.
• Virtualisierung (Virtualization) Server, application, and network virtualization services to maximize hardware utilization, reduce energy consumption, enable multiple operating systems and applications on single servers, and provide flexible resource allocation.
• Mail Services Email system services including maximum availability and reliability through redundant systems, advanced security protocols with encryption, anti-virus and anti-spam filters, and comprehensive archiving for long-term storage.
• Software- & Lizenzoptimierung (Software & License Optimization) Software and license optimization services to analyze current license models, identify optimization potential to avoid over-licensing or unnecessary expenses, ensure cost control, scalability, and future security.
• Cybersecurity Schulungen (Cybersecurity Training) Cybersecurity training program with 10 chapters and 41 lessons covering approximately 1 hour 7 minutes of content including data security introduction, threat types, security measures, internet behavior, mobile device security, security incident response, and employee roles in data security.

Quantifiable outcome

• 9 out of 10 companies failed security audits in company testing, highlighting importance of their services
• +1 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability3 records

Feature2 records

Partnerships

Two partnerships are on record, tiered core and supporting.

• MicrosoftcoreTechnology or IntegrationMicrosoft partner providing Microsoft 365, Azure cloud, Windows Server, Remote Desktop Services, and Exchange implementations. ISS specializes in Microsoft technology stack for clients.
• External Data Protection Consultants and IT Law SpecialistssupportingStrategic or Co-development PartnerPartnership with external data protection consultants and legal specialists (Fachanwälte für IT-Recht) to provide comprehensive data protection services.

Scale indicators4 records

Recent moves7 records

Expansion highlights3 records

Broad incumbents

• Bechtle AG: One of the largest IT service providers in Germany with broad managed services, cloud, and workplace offerings. Larger incumbent that competes for the same Mittelstand managed-services contracts but lacks ISS's housing-vertical specialization.
• CANCOM: Leading German provider of IT services, cloud, and managed workplace solutions. Broad incumbent overlapping with ISS in Microsoft Azure, M365, and managed services for German Mittelstand.
• SVA System Vertrieb Alexander GmbH: Mid-sized German IT system integrator and managed services provider with strong Microsoft partnership. Comparable delivery model for Mittelstand customers, though without ISS's housing-vertical focus.
• Computacenter: Major European IT infrastructure and managed services provider with significant DACH operations. Broad incumbent in mid-market and enterprise managed services; comparable on Microsoft-centric delivery but not housing-vertical focused.
• Allgeier SE: German IT services group offering managed services, consulting, and software across multiple verticals. Broader portfolio than ISS but competes for similar DACH Mittelstand IT-outsourcing mandates.

Direct peers

• Haufe Group: German provider of software, content, and services with a dedicated housing industry portfolio (Haufe Wohnungswirtschaft). Competes with ISS for housing-company IT budgets through compliance, document management, and workflow solutions.
• Aareon: Leading European IT specialist for the housing industry, offering ERP, CRM, and IoT solutions to Wohnungsunternehmen and property managers. Most direct competitor to ISS in serving German housing cooperatives with both software and managed services.
• GWS Gesellschaft für Warenwirtschafts-Systeme mbH: Specialized IT service provider for the German housing and retail industry with Wodis and related ERP offerings. Comparable in serving Wohnungsgenossenschaften with managed IT and vertical software.

Others

• Datev eG: Cooperative IT provider for tax consultants, auditors, and lawyers in Germany. Comparable only as a German cooperative-rooted IT services provider with deep vertical specialization, not a direct competitor in housing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@issgmbh
• Facebookfacebook.com/share/19jTEZvzbg/?mibextid=wwXIfr
• LinkedInlinkedin.com/in/maximilian-strempel-499730292
• Instagraminstagram.com/iss.gmbh?igshid=MWc0NGh4YzEzbmU0Yw==

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 ISS