Diamant 4
Diamant 4 is the financial-accounting-and-controlling system from Diamant Software, a German specialist vendor headquartered in Bielefeld. The product targets the German Mid-Market finance function specifically, sitting between the SMB accounting tools (Lexware, DATEV) and the financial modules of full mid-market ERPs (Microsoft Dynamics 365 Business Central, Sage 100, myfactory). Diamant Software focuses exclusively on financial accounting and controlling rather than the broader ERP scope, which means the financial-and-controlling functional depth is materially deeper than the accounting modules of multi-purpose ERPs. Customer profiles are German Mid-Market businesses between 50 and 500 employees that run their operational workflows in one ERP and their financial accounting in Diamant as a best-of-breed finance system.
Architecture and deployment
Diamant 4 is delivered as on-premises or hosted private-cloud. The architecture is a classical client-server enterprise application with a Windows-rich-client interface for finance users, supplemented by browser-based interfaces for specific workflows like approval routing, expense submission and management dashboards. Cloud SaaS in the strict multi-tenant sense is not the primary deployment model, though Diamant has invested in cloud-modernisation for the product line over recent years. Integration with operational ERPs is via documented APIs, standard accounting-data-exchange formats (DATEV, EBICS, ZUGFeRD) and partner-supplied connectors. Customisation is configuration-based with structured extension capabilities for customer-specific reporting and workflow.
Functional scope
Financial-accounting depth is the entire raison d'etre. Diamant 4 covers general ledger with multi-entity consolidation, accounts payable with workflow-based invoice approval, accounts receivable with dunning workflows and credit-control, fixed-asset accounting, cost-and-revenue accounting with detailed cost-centre and cost-object structures, contribution-margin accounting, internal-management reporting with the typical DACH controlling KPI set, IFRS and HGB parallel accounting, electronic bank-statement processing via EBICS, payment-run management and DATEV connectivity. Reporting and analytics include the standard DACH Mid-Market monthly reporting pack and ad-hoc analysis tools. Planning and forecasting are supported for budget-versus-actual workflows. The functional depth matches or exceeds dedicated finance modules of mid-market ERPs.
DACH localisation and DATEV
DACH localisation is the core competitive moat. GoBD compliance is built in and formally certified. DATEV connectivity is native and deep — Diamant supports both the import-export workflow for the tax-adviser DATEV pattern and the direct-bookkeeping pattern where the customer runs accounting in-house with DATEV chart-of-accounts conventions. The German chart-of-accounts standards (SKR03, SKR04 and variants), German cost-centre accounting conventions and the typical DACH Mid-Market reporting structures are out-of-the-box. ZUGFeRD and XRechnung inbound-and-outbound e-invoicing are fully supported. EBICS bank-statement integration is mature. Austrian and Swiss localisations are mature for cross-border DACH operations. The depth of DACH-fiscal localisation is the operational reason German Mid-Market customers choose Diamant over the finance modules of international ERPs.
Pricing model and TCO
Diamant 4 is licensed either as a perpetual licence with annual maintenance or as a subscription. Public list pricing is not standardised; mid-market deals negotiate based on user count, module footprint and entity scope. For a 75-user Mid-Market finance organisation, all-in TCO over five years typically lands in the mid-six-figure range, including implementation services and integration into the operational ERP. Implementation timelines run four to twelve months for typical scope, faster than for the finance modules of full ERPs because the standard product covers DACH Mid-Market finance workflows without extensive customisation. The economic case versus running finance in the operational ERP's built-in modules is the deeper functional capability, particularly for multi-entity consolidation and IFRS-HGB parallel accounting.
Selection considerations
Diamant 4 is a strong fit for German Mid-Market businesses (50 to 500 employees) that need deeper financial-accounting capability than the standard finance modules of operational ERPs provide — particularly for multi-entity consolidation, IFRS-HGB parallel accounting and structured controlling workflows. It is less compelling for very small businesses below 50 employees (DATEV directly or the accounting modules of myfactory, weclapp suffice), for organisations that prefer all-in-one ERP rather than best-of-breed operational-plus-finance, or for very large enterprises above 500 employees where SAP S/4HANA Finance, Workday Financials or Oracle Fusion Cloud Financials provide more scale and deeper consolidation capability. The competitive set includes the dedicated-finance modules of the larger ERPs, LucaNet (for consolidation) and the IDL group's consolidation products.
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Frequently Asked Questions
Why use Diamant 4 if my ERP already has finance modules?
Many mid-market ERPs have functional finance modules that suffice for single-entity operations and straightforward Mittelstand bookkeeping. Diamant 4 makes operational sense when the customer needs deeper functional capability than the ERP's built-in finance provides — particularly multi-entity legal-entity consolidation, IFRS-HGB parallel accounting, structured controlling workflows or compliance with audit-friendly process flows. The trade-off is the integration overhead of running a separate finance system alongside the operational ERP, which has to be weighed against the functional benefit.
How does Diamant 4 compare with LucaNet?
Both are German finance-specialist products but they have different functional positioning. Diamant 4 is a full operational accounting system covering general ledger, AP, AR, fixed assets and cost accounting with DATEV connectivity — you can run your bookkeeping in Diamant. LucaNet is a consolidation-and-planning specialist that ingests data from operational accounting systems and adds the consolidation, planning and management-reporting layer on top. The two products are often used together: Diamant for operational bookkeeping in DACH legal entities, LucaNet for group consolidation and management reporting across the holding.
Is Diamant 4 a cloud product?
Cloud delivery is available as hosted private cloud (vendor or partner-managed). Strict multi-tenant cloud SaaS in the modern sense is not the primary deployment model. Diamant has invested in cloud-modernisation but the customer base remains primarily in hosted-private-cloud or on-premises operation. For DACH Mittelstand customers comfortable with that operational pattern, this is acceptable; for buyers requiring native multi-tenant cloud SaaS, the strict cloud-finance alternatives are different products.