ISB

What ISB does

ISB GmbH is a privately held German software company founded in 1994 that develops and sells the is4 ERP system to mid-market industrial Mittelstand customers in Germany. The company was formed as a spin-off from Integra S&B GmbH (1989) and operates from its headquarters in Linkenheim-Hochstetten (Baden-Württemberg) with a northern branch office in Nordenham established in 2008. Management is family-held, with Karl, Simon, and Sarah Thorwart jointly serving as Managing Directors (Geschäftsführer), and the firm has been operating for 24+ years with a stated employee range of 1–10.

The is4 ERP system is built on a proprietary four-layer architecture (Presentation, Application, Base Functions, Database Access) implemented in Java since 2000, supporting deployments from small suppliers with 5 users to corporations with up to 5,000 users across multiple sites. Distinctive technical components include the is4 ScreenDesigner for UI customization without altering ERP logic, the is4 JBMI (BatchMapInput) interface for simulating interactive legacy inputs, a drag-and-drop data warehouse tool, and over 5,000 system tables enabling table-driven configuration without code changes. The company's deepest technical heritage is in mainframe migration, with the ability to take over COBOL programs 1:1 without code conversion, a capability developed since the firm's BS2000 roots in the late 1980s.

ISB generates revenue through a combination of one-time software licensing for is4 and its modules (Production, Warenwirtschaft/Handel, Sales, Purchasing, Warehouse, Financial Accounting, Data Warehouse, Basisdaten), project-based implementation services (Systemeinführung), recurring system support and training (Systembetreuung, Schulung), mainframe migration services, and standalone management consulting. The firm serves seven primary verticals—serial manufacturers, steel manufacturers, plant construction, electrical industry, special machine construction, wholesale, and pension insurance—with named reference customers including Herbert Kannegiesser GmbH (400 workstations across 5 sites), Versorgungsanstalt des Bundes und der Länder (350 workstations), Brennenstuhl (200+50 workstations), Schmidt + Clemens, and New York Hamburger. Distribution is exclusively direct via two regional offices, with no third-party channel partners, no public pricing, and no disclosed revenue, funding, or detailed headcount figures.

Name

ISB

Legal name

ISB GmbH

Website

https://isb.net

Company type

Private

Founded year

1994

Headcount range

1–10 employees

Short description

ISB GmbH is a privately held German software vendor founded in 1994 that develops and sells the is4 ERP system to mid-market industrial Mittelstand customers across manufacturing, wholesale, and pension insurance verticals, generating revenue from software licensing, implementation services, and mainframe migration.

Ownership category

akta.pro rank

Product category

Enterprise Resource Planning (ERP) Software

NAICS

Computer Systems Design and Related Services (54151), Computer Systems Design Services (541512)

SIC

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

akta.pro primary industry

Network Architecture & Design Services (BPAEAEAA)

akta.pro secondary industry

IT Asset Disposition (ITAD) & Secure Data Erasure (BPAEAOAK)

Keywords

• ERP software
• Manufacturing ERP
• Mainframe migration
• Production planning
• Warehouse management

Headquarters

HQ city

Linkenheim-hochstetten

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. ERP System Licensing (is4): License-based revenue from the is4 ERP system and its modules (Production, Inventory/Warenwirtschaft, Sales, Purchasing, Warehouse, Financial Accounting, Data Warehouse, Basic Data). Implemented as multi-site, scalable deployments ranging from 5 to 5,000 users. Customer-specific release-capable adaptations and branch modules generate additional license revenue.
2. System Implementation Services (Systemeinführung): Project-based professional services revenue from ERP system introduction projects focused on time, cost, and delivery quality. Includes project management, configuration, and go-live support.
3. System Support and Training (Systembetreuung & Schulung): Recurring revenue from ongoing system support contracts and training services. Includes key user training and end-user training either at customer site or at ISB's offices.
4. Management Consulting: Consulting revenue from process optimization, strategy development, project management, and employee skills development (presentation, time management, conflict management, negotiation techniques). Delivered via workshops and independent of the is4 ERP deployment.
5. Mainframe Migration Services: Project-based revenue from migrating legacy mainframe applications (including COBOL programs, BS2000 systems) to client/server platforms. Covers full application migration, legacy data takeover for information systems, and rapid prototyping for tight deadlines.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

ISB GmbH develops and licenses the is4 ERP system, a Java-based 4-layer architecture platform for manufacturing, wholesale and pension-insurance organizations. The is4 core is sold together with functional modules (Production, Purchasing, Sales, Warehouse, Financial Accounting, Data Warehouse, Basisdaten, Warenwirtschaft) and is complemented by professional services including ERP implementation, system support, training, mainframe migration, and management consulting.

Product overview

ISB GmbH offers the is4 ERP-System as a single unified 4-layer architecture (Presentation, Application, Base Functions, Database) platform, configured for serial manufacturers, single-piece / plant engineering manufacturers, and trading/wholesale companies. Around this core platform sit eight functional modules — is4 Basisdaten, Produktion, Warenwirtschaft/Handel, Finanzbuchhaltung, Einkauf, Vertrieb, Lager and Data Warehouse — that can be introduced individually or as a complete suite. The is4 core is complemented by a separate service portfolio: Mainframe Migration / Altdatenübernahme, Managementberatung (process optimisation, strategy development, project management, employee capability development), Systemeinführung, Systembetreuung and Schulung. The product's distinctive positioning is mengengesteuerte (volume-driven, not value-driven) PPS for individual manufacturing processes, with features like the is4 ScreenDesigner, multilingual UI, intelligent BatchMapInput (JBMI) interfaces, and releasefähige partner customisations.

Differentiator

Problem solved

Functional benefit

Products and services

• is4 ERP-System ISB's flagship 4-layer architecture (Presentation / Application / Base Functions / Database) ERP platform emphasizing quantity-driven (mengengesteuerte) production planning and control (PPS) for individualized manufacturing. Scalable from small suppliers to 5,000-user corporations, with multilingual UI and release-capable customer-specific adaptations.
• is4 Basisdaten (Master Data Module) Master data module providing fast, user-friendly management of articles, customers, suppliers, bills of material, warehouse bins/locations, workstations, plans, tools, representatives, freight companies and intra-trade statistics for all business areas.
• is4 Produktion (Production Module) Production module for mechanical engineering, single-piece and serial manufacturers, supporting multi-plant operations, production planning, automatic disposition, order simulation, subcontracting (extended workbench) and missing-parts management.
• is4 Warenwirtschaft/Handel (Merchandise Management & Trading Module) Wholesale/trading module handling large order volumes (1,000+ orders / 6,000+ line items per day), flexible price-finding, integrated shipping, transport logistics management, GIS integration, campaign management and field sales support.
• is4 Finanzbuchhaltung (Financial Accounting Module) Financial accounting module offering client management, account management, booking entry, open-item management, electronic payment, dunning, cost capture, corporate reporting, historical open items, bank statement import, foreign payment and client consolidation, with proven interfaces to a market-leading German accounting/ERP system.
• is4 Einkauf (Purchasing Module) Purchasing module covering supplier selection, demand notifications, budget management, order management, goods receipt, supplier evaluation, supplier dunning and invoice verification across the full procurement workflow.
• is4 Vertrieb (Sales Module) Sales module covering order entry, automatic and manual reservation, picking list handling, delivery notes, invoice release and handover to financial accounting, with integrated CRM functions for the field force (master/transaction data, contact data, evaluations, tour planning, expense management, campaigns, catalogue data).
• is4 Lager (Warehouse Module incl. is4-Lagerleitstand) Warehouse module providing inventory management with multiple booking types, automatic bookings from purchasing/sales/production, quality control, packing-unit and picking-list management, plus an independent is4-Lagerleitstand (warehouse control centre) for paperless operations with hand-held and forklift-mounted scanners.
• is4 Data Warehouse Drag-and-drop reporting and statistics tool allowing end users to assemble new reports with minimal training by combining data imported from any system that permits extraction; supports configurable periodic (typically daily) refresh processes.
• Mainframe Migration / Altdatenübernahme Service for migrating mainframe (host) applications — including COBOL programmes and other legacy artefacts — to client/server platforms or for static data transfer into a low-maintenance information system; can be delivered as full re-development, partial takeover, or temporary bridge solution while the host is decommissioned.
• Managementberatung (Management Consulting) Independent consulting services covering process optimisation, strategy development, project management (incl. coaching) and employee capability development (presentation, time/priority management, conflict management, negotiation technique), delivered via workshops.
• Systemeinführung (ERP Implementation Services) Joint implementation services for the is4 ERP system structured around time, cost, deliverables and quality, designed to avoid the '90% syndrome' through early identification of deviations.
• Systembetreuung (System Support) Flexible system administration and support services tailored to whether the customer runs is4 in-house or requires minimal/full external support, typically delivered as a recurring managed service.
• Schulung (Training) Training for is4 key users (to cascade within the customer organisation), broader is4 end-user training on- or off-site, plus management-training offerings described under Managementberatung.

Quantifiable outcome

• Scales from 5 to 5,000 users per deployment; supports single-server 30-50 user setups to distributed multi-server deployments with 4-digit user counts
• +5 more outcomes

Named customers5 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature8 records

Scale indicators7 records

Recent moves6 records

Expansion highlights3 records

Direct peers

• Asseco Solutions: European mid-market ERP vendor (formerly MES, Schelling, APplus) with a strong footprint in German-speaking manufacturing. Comparable in customer profile, module structure, and on-premise delivery model to ISB.
• proALPHA Group: German mid-market ERP vendor focused on manufacturing, wholesale, and services. Directly comparable to ISB in customer segment (industrial Mittelstand), on-premise delivery model, and emphasis on production planning and customizability.
• Oxaion: German mid-market ERP vendor for manufacturing and project-based industries (formerly Infor COM). Direct comparable to ISB on Mittelstand industrial focus, production planning emphasis, and on-premise / hybrid deployment model.
• abas Software: Mid-market ERP provider for German and European manufacturers, with deep production and customization capabilities. Overlaps with ISB's target buyer (Mittelstand industrial), modular ERP architecture, and consultative implementation approach.

Broad incumbents

• Sage Group: Global SMB and mid-market ERP/accounting vendor with established presence in Germany. Comparable to ISB on mid-market customer focus, financial accounting module, and recurring support model, but with vastly greater scale and a cloud-first roadmap.
• PSI Software AG: Larger German software vendor with industry-specific ERP and production software for energy, utilities, manufacturing, and infrastructure. Comparable to ISB on German industrial vertical coverage and process-oriented software, but at materially greater scale and breadth.
• Infor: Industry-specific cloud ERP vendor with strong manufacturing and distribution verticals in Europe. Comparable to ISB on industrial customer focus and industry-template approach, but at much larger scale and with a cloud delivery model.
• Microsoft Dynamics 365: Cloud-first mid-market ERP/CRM suite from Microsoft, widely adopted in German Mittelstand. Represents the cloud-native competitive alternative that ISB's on-premise, Java-based stack must contend with for new logo wins.
• SAP SE (Business One / S/4HANA): Global ERP incumbent with mid-market offerings (Business One, S/4HANA Cloud). Direct competitive overlap with ISB for German Mittelstand ERP deals; ISB's stated interface to the 'market-leading Rechnungswesen system of a major German software house' explicitly references this relationship.

Regional players

• Allgeier (Steeb / varial): German IT group that resold and ran mid-market SAP/Microsoft ERP implementations to Mittelstand customers. Comparable in target market and on-premise delivery to ISB, though focused on third-party ERP brands rather than proprietary product.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

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 ISB