What Diamant Software does

Diamant Software GmbH is a Bielefeld, Germany-based provider of accounting and controlling software for the DACH Mittelstand, founded in 1980 and operating for over 45 years with approximately 340-350 employees. The company's flagship product is Diamant/4, a modular financial-accounting and controlling platform whose core Finanzbuchhaltung module is extended with optional modules for accounts payable, sales invoicing, banking, fixed assets, reporting & analysis, cost and activity accounting, planning, and consolidation. The platform is deployed as SaaS, private cloud, hybrid cloud, or on-premises and is certified against GoBD, DSGVO, NIS2, BSI-C5, EN 16931, PS 880, and BaFin requirements; it integrates via REST, OData, and SOAP with ERP, HR, CRM, DMS, BI, planning, banking (via BaFin-certified BANKSapi), and tax systems including DATEV, ELSTER, SAP, Microsoft Dynamics, ProAlpha, Personio, Power BI, TARGIT, Jedox, LucaNet, and Creditreform. Diamant serves more than 100,000 users across mid-market companies (50+ employees), corporate groups, social and healthcare organizations, and industry-specific verticals in Germany, Austria, and Switzerland, with named customers including IHK München und Oberbayern, Uelzener Versicherungen, Windmöller, Eggersmann Gruppe, Diakonie Leipzig, Caritas Köln, Square Consult, and Müller-Lila-Logistik.

Diamant's current strategic positioning centers on 'Agentic Finance & Controlling' — a domain-specific AI layer that productizes vertical AI agents for invoice processing, month/year-end closing, open item management, intercompany reconciliation, variance analysis, rolling forecast, KPI monitoring, and consolidation, all anchored on Microsoft Azure and governed with full audit traceability. In November 2025, the company entered into a strategic partnership with Hg (HgCapital), a software-focused private equity firm, and simultaneously appointed Sven Krüger as CEO and Rainer Hehmann as CPO to lead the next phase of platform and go-to-market expansion.

The business model is primarily quote-based annual SaaS subscriptions on a modular core-plus-modules architecture, supplemented by professional services (implementation, consulting, training, support) delivered by both direct staff and a DACH partner network. GTM is sales-led and consultative, targeting mid-market CFO and head-of-accounting buyers via demo-video funnels, individual product consultation bookings, content marketing, webinars, partner channels, and industry events — with no public pricing, consistent with an enterprise/mid-market direct sales motion rather than self-serve PLG.

Name

Diamant Software

Legal name

Diamant Software GmbH

Website

https://diamant-software.de

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

251–500 employees

Short description

Diamant Software is a Bielefeld, Germany-based provider of the Diamant/4 modular accounting and controlling platform for DACH mid-market companies and regulated organizations. Founded in 1980, the 340-350-person firm serves 100,000+ users across core accounting, AP, banking, consolidation, and AI-driven agentic workflows.

Ownership category

akta.pro rank

Product category

Accounting and Controlling Software

NAICS

Software Publishers (5132)

SIC

Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Core ERP Suites (Financials, Procurement, Projects) (HDAEAEAA)

Keywords

• Accounting software
• Controlling software
• Invoice automation
• Consolidation software
• ERP integration

Headquarters

HQ city

Bielefeld

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Subscription (SaaS): Diamant/4 is delivered as a cloud-based software-as-a-service (SaaS) solution. Customers pay recurring subscription fees for access to the platform and its modules. Deployment options include standard cloud (SaaS), hybrid cloud, private cloud, and on-premises (eigenbetrieb) for selected modules.
2. Professional Services: Implementation services, consulting, training, and support are offered alongside the software. The company provides structured onboarding methodology covering preparation, analysis, realization/testing, and go-live phases. Individual consulting conversations drive pricing and service scoping.
3. Module Upgrades and Extensions: The modular architecture allows customers to expand their solution with optional extensions including asset accounting, cost accounting, planning, reporting, invoice input management, factoring, banking, and group accounting modules. Each additional module represents an upsell opportunity within the existing customer base.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Diamant Software provides Diamant/4, a modular accounting and controlling software platform built on Microsoft Azure for the DACH mid-market (companies with 50+ employees). The platform centers on a Financial Accounting core module with optional add-ons including accounts payable/invoice processing, sales invoicing, banking with BaFin-certified payment initiation, fixed asset accounting, cost & activity accounting, reporting/BI, planning, and group consolidation. The solution emphasizes GoBD compliance, AI-powered invoice recognition, and Agentic Finance & Controlling capabilities that automate routine accounting tasks with full audit traceability.

Product overview

Diamant Software offers Diamant/4, a modular accounting and controlling platform for the DACH Mittelstand (mid-sized companies). The platform follows a core-plus-modules architecture where the Finanzbuchhaltung (Financial Accounting) module serves as the foundational base enabling all other functionality. Optional extensions include: Rechnungseingangsmanagement for accounts payable/invoice processing, Faktura for sales invoicing, Banking for integrated bank account management, Anlagenbuchhaltung for fixed asset accounting, Berichtswesen for reporting and analysis, Kosten- und Leistungsrechnung for cost accounting, Planung for budgeting and forecasting, and Konzernbuchhaltung for group consolidation. The platform is complemented by the Diamant Integration Hub for third-party system connectivity. Deployment options include Cloud (SaaS), Private Cloud, Hybrid Cloud, and On-Premises. The company also provides the Diamant/4 E-Learning Portal as part of its service offering. Diamant Software positions itself as an AI-First company, with Agentic Finance & Controlling as its strategic development direction for the future of accounting and controlling software in the Mittelstand.

Differentiator

Problem solved

Functional benefit

Brands

• Diamant/4: The core software product for accounting and controlling, designed for mid-sized companies in the DACH region.

Products and services

• Diamant/4 Platform Modular accounting and controlling software platform for DACH mid-market companies, consisting of a core Financial Accounting module with optional extensions for accounts payable management, invoicing, banking, fixed asset accounting, reporting & analysis, cost & activity accounting, planning, and consolidation. Supports cloud, on-premises, and hybrid deployment models.
• Finanzbuchhaltung (Financial Accounting) Core module that enables all other functionality in Diamant/4. Supports efficient handling of all accounting processes including booking, payment transactions, open item management, reporting, and period-end closing. GoBD-compliant data storage and processing.
• Rechnungseingangsmanagement (Accounts Payable / Invoice Input Management) Digital invoice processing module that automates the entire invoice workflow from entry to approval, including AI-supported document recognition and checking, automated workflows, and compliance with electronic invoice requirements (XRechnung, ZUGFeRD).
• Faktura (Invoicing) Invoice creation module for generating sales invoices directly in the browser without Word and Excel. Supports automatic booking and archiving, e-invoice formats (XRechnung, ZUGFeRD), and seamless integration with the financial accounting module.
• Banking Banking module that integrates banking and accounting in one system. Enables bank- and tenant-spanning account overview, real-time balance monitoring, and direct payment submission via BaFin-certified BANKSapi. Supports SEPA payments, direct debits, and VEU authorization. Exclusively available via cloud/SaaS deployment.
• Anlagenbuchhaltung (Fixed Asset Accounting) Fixed asset management module for transparent and current overview of assets. Supports depreciation calculations per HGB, tax law, IFRS, and US GAAP with automated computations and simulation capabilities. PS 880 certified.
• Berichtswesen (Reporting & Analysis) Reporting and analysis module providing legally compliant standard reports and modern analyses with real-time dashboards, intelligent comparisons, and drill-down to individual documents. Includes integration with Excel, Power BI, and other BI systems.
• Kosten- und Leistungsrechnung (Cost & Activity Accounting) Cost and activity accounting module providing transparency over costs, profitability and optimization potential. Supports cost center, cost type, cost object, project, and business unit accounting with flexible reporting and analysis capabilities.
• Planung (Planning) Financial planning module for integrated budget planning, scenario comparison (Plan/Ist), rolling planning, and workflow-based planning processes. Supports up to eight parallel planning alternatives and Excel integration.
• Konzernbuchhaltung (Consolidation / Group Accounting) Consolidation and group accounting module for multi-entity organizations. Supports consolidation closing, intercompany reconciliation, and consolidated reporting per HGB, IFRS, and US GAAP requirements.
• Diamant Integration Hub Central integration platform that connects Diamant/4 with other enterprise systems using standardized components instead of individually programmed interfaces. Enables digitalization and automation of business processes across ERP, CRM, HR, and BI systems.

Quantifiable outcome

• 50% time savings in accounting operations reported by customers (Square Consult GmbH)
• +3 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration18 records

AI capability7 records

Feature6 records

Partnerships

Five partnerships are on record, tiered core and major.

• Microsoft AzurecoreTechnology or IntegrationMicrosoft Azure serves as the foundational technical infrastructure for the Diamant/4 cloud platform. The company explicitly states 'Microsoft Azure die technische Grundlage von Diamant/4 ist' (Microsoft Azure is the technical foundation of Diamant/4). This cloud infrastructure partnership enables the SaaS delivery model, AI capabilities, and security certifications (NIS2, BSI-C5) that form the basis of the agentic finance and controlling platform.
• BANKSapicoreTechnology or IntegrationBANKSapi is the BaFin-certified account information and payment initiation service provider integrated into the Diamant/4 Banking module. Enables secure account aggregation, SEPA payments and direct debits, and electronic payment authorization via the VEU app. All bank connections and payment processing flow through this certified financial service provider, ensuring regulatory compliance for banking operations.
• DATEVmajorTechnology or IntegrationDATEV is a major German accounting software and tax advisory cooperative that provides standards for data exchange between companies and tax advisors/accountants. Diamant/4 integrates with DATEV for automated data exchange with tax advisors and auditors, enabling efficient collaboration and compliance with German tax documentation requirements.
• ELSTERmajorTechnology or IntegrationELSTER is the German electronic tax reporting system operated by the tax authorities. Diamant/4 integrates with ELSTER for electronic transmission of tax declarations including VAT pre-registrations (Umsatzsteuer-Voranmeldung) and annual tax filings, enabling fully electronic tax compliance workflows.
• TARGIT (Powering Diamant BI)majorTechnology or IntegrationTARGIT provides the BI engine powering Diamant BI, the integrated business intelligence layer for the Diamant/4 platform. The partnership enables cross-client analysis, data warehousing, and integration with downstream BI systems for comprehensive financial reporting and controlling.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Agenda Software: Agenda Software provides mid-market financial accounting, controlling, and payroll solutions for German Mittelstand companies. Its target segment and module architecture closely mirror Diamant/4, making it a direct niche competitor in the same vertical and price band.
• Addison (Wolters Kluwer): Addison is a major German accounting, tax, and ERP software suite from Wolters Kluwer, widely used by tax advisors and mid-market companies. It directly competes with Diamant in financial accounting, payroll, and reporting for the German Mittelstand.
• Lexware (Haufe Group): Lexware is a leading German accounting, payroll, and invoicing software suite for SMBs and self-employed professionals, owned by Haufe-Lexware. It competes head-to-head with Diamant/4 in the lower end of the German accounting software market with overlapping financial-bookkeeping and invoice-processing functionality.
• DATEV: DATEV is the dominant German cooperative for tax advisors and SMEs, providing accounting, tax compliance, and payroll software. It is the most entrenched competitor in the DACH financial-accounting space and the de facto standard interface for Steuerberater — directly comparable to Diamant's mid-market financial accounting focus.

Broad incumbents

• SAP (S/4HANA Finance): SAP is the dominant enterprise ERP vendor with embedded financial accounting and controlling modules in S/4HANA. While SAP targets larger enterprises, its mid-market push via SAP Business One and S/4HANA Cloud overlaps with Diamant's value proposition — particularly for customers seeking single-stack ERP with native finance.
• Sage (Simba): Sage provides accounting and ERP solutions across Europe, with Simba/Sage 50/100 historically serving the German Mittelstand. As a broad incumbent with overlapping financial-bookkeeping functionality, it is a comparable competitor for customers evaluating alternatives to Diamant/4.
• Microsoft Dynamics 365 Finance: Microsoft Dynamics 365 Finance is an enterprise ERP with global financial-management capabilities. As a broad incumbent, it offers overlapping financial accounting and reporting functionality that competes with Diamant for mid-market customers prioritizing a single-platform Microsoft stack over best-of-breed accounting.

Regional players

• proALPHA: proALPHA is a German mid-market ERP vendor for manufacturing, trade, and services with embedded financial accounting modules. It is integrated with Diamant/4 via the Diamant Integration Hub and serves an overlapping mid-market customer base, positioning it as both a partner and a potential embedded-finance competitor.

Emerging players

• sevDesk: sevDesk is a cloud-native accounting and invoicing platform targeting German freelancers and SMBs. While positioned for smaller customers than Diamant, it represents the cloud-first, modern UX wave of accounting software challenging traditional on-prem and hybrid vendors like Diamant.
• LucaNet: LucaNet is a specialized German software vendor for financial consolidation, planning, and statutory reporting. It overlaps directly with Diamant's Konzernbuchhaltung and Planung modules, and is integrated into Diamant/4 as a partner — representing both an integration partner and a potential competitive substitute for consolidation-heavy buyers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInde.linkedin.com/company/diamant-software-gmbh
• Instagraminstagram.com/diamantsoftware/?hl=de
• Facebookfacebook.com/DiamantSoftwar

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Diamant Software