PARITY.ERP
PARITY.ERP is a Mid-Market ERP from a Ditzingen-based German vendor with a focus on release-safe customisation and platform independence (Windows and Linux). The product is built on the Qt application framework and uses a custom layered architecture that preserves customer-specific extensions across version upgrades — one of the more durable answers to the perennial Mid-Market problem of customised ERPs that ossify into legacy systems within a decade. PARITY targets German Mid-Market businesses across industry, wholesale, distribution and technical retail, with company sizes from a handful of users up to several hundred. The customer base concentrates in industry, technical wholesale, distribution and EDI-heavy specialist verticals.
Functional scope
PARITY.ERP spans nine core functional areas working as one suite. Sales covers quotes, orders and invoicing including foreign languages, returns, dynamic pricing and conditions management. Purchasing covers RFQs, purchase orders and incoming-goods. Warehouse, light production and basic service-management round out the operational core. Surrounding modules cover an integrated CRM, document management (DMS), business intelligence (BI), and an e-commerce module. The product's functional breadth covers the typical Mid-Market process map; the technical-wholesale and EDI patterns are particularly developed.
Platform and architecture
PARITY.ERP is built with the Qt framework and is genuinely platform-independent: the software runs on Microsoft Windows and on Linux. In the background, the PARITY libraries with more than 1,000 functions are shared across the applications and across platforms. The architecture is multi-layered with clean separation of data, business logic and presentation, which underpins the release-safe customisation model.
Release-safe customisation
The release-safe customisation is the central architectural argument. The customising concept ensures that customer-specific extensions remain compatible with current and future versions. In a market where many Mid-Market ERPs degrade into never-upgrade legacy systems, the formal preservation of upgradability is a meaningful long-term TCO argument. The combination with the Qt platform-independence reduces the total stack risk further — customers are not locked into a single operating-system roadmap.
DACH localisation and DATEV
PARITY.ERP handles the German Mid-Market finance and tax workflow natively. DATEV integration — DATEV is the cooperative of German tax advisors whose data format is the SME finance-exchange standard — is supported through dedicated exporters so the customer's external accountant can keep working in DATEV without re-keying. GoBD compliance — the German principles for proper digital bookkeeping — is part of the standard audit-trail and archiving capability. ZUGFeRD and XRechnung e-invoicing are covered. More than 200 EDI connections are operated on PARITY infrastructure for customers in technical wholesale, distribution and supplier-to-retailer integrations.
Competition and selection
PARITY.ERP competes with other Mid-Market ERPs such as proAlpha, abas ERP, Sage 100 and vertical specialists for trading and industry. The advantage of PARITY is the direct connection between development, consulting and service — no multi-tier partner chains — combined with the release-safe customisation and the cross-platform technology stack. PARITY licensing is available as classical perpetual licence with maintenance or as subscription; pricing depends on users, modules and integrations. Implementation runs direct from Ditzingen, supplemented by certified partners, typically starting with a requirements analysis followed by customisation and a structured roll-out.
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Vendor homepage of PARITY.ERP
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Frequently Asked Questions
Does PARITY.ERP run on Linux?
Yes. The Qt-based architecture delivers genuine platform-independence: the software runs on both Microsoft Windows and Linux with feature parity. This is uncommon in the DACH Mittelstand ERP market and meaningful for customers with Linux-first IT strategies.
How does release-safe customisation work?
The customising concept architecturally separates the standard product from the customer-specific extensions, so version upgrades touch only the standard and the customisation is replayed cleanly. The result is that customised installations remain upgradable across multiple major-version cycles rather than becoming frozen legacy systems.
How many EDI connections does PARITY operate?
More than 200 EDI connections are operated on PARITY infrastructure across the customer base, primarily for customers in technical wholesale, distribution and supplier-to-retailer integrations. The EDI depth is one of the practical reasons EDI-heavy Mittelstand customers shortlist PARITY.
Does PARITY support DATEV?
Yes. Dedicated DATEV exporters let the customer's external tax advisor receive posting data in the standard DATEV format used across the German SME accounting ecosystem.