Dr. Dienst & Partner

What Dr. Dienst & Partner does

Dr. Dienst & Partner GmbH & Co. KG, operating under the DDP GRUPPE umbrella, is a German multi-disciplinary professional services firm founded in 1967 by Dr. Diether Dienst and headquartered in Koblenz. The firm delivers integrated tax advisory (Steuerberatung), statutory and voluntary auditing (Wirtschaftsprüfung), legal advisory (DDP Legal), IT consulting (DDP.IT Services), and management consulting (DDP Consulting) to listed companies, mid-market corporates, family-owned Mittelstand SMEs, public sector and municipal entities, non-profit organizations, and clients in energy and real estate sectors. With approximately 251–500 employees across nine German offices (Boppard, Erfurt, Frankfurt am Main, Koblenz, Mainz-Gonsenheim, Mainz-Finthen, Mayen, Montabaur, Zell) and ~100 employees at the Koblenz headquarters, the firm operates on a partner-led, advisory-driven engagement model emphasizing interdisciplinary collaboration across tax, audit, legal, IT, and consulting teams under one roof.

The firm's core service portfolio is structured around five sub-brands: DDP Wirtschaftsprüfung and Steuerberatung as the regulatory-licensed core; DDP Legal (corporate, labor, succession, and tax litigation); DDP.IT Services (IT infrastructure, network and security, Microsoft 365, DATEV, ISMS implementation); DDP Consulting (ESG/CSRD/ESRS reporting, CFO advisory, SAP S/4HANA planning, Power BI analytics); and specialty offerings including an Italian Desk for cross-border advisory, group consolidation services, and outsourcing. Digital client-facing tools include KanzleiDrive (cloud document collaboration platform) and DDPtaxpert (tax knowledge/newsletter portal). The technology stack is built on standard enterprise platforms — Microsoft 365, DATEV, SAP S/4HANA, Microsoft Power BI, and ISMS — with proprietary differentiators limited to the KanzleiDrive portal and DDPtaxpert content platform. The firm holds regulatory Wirtschaftsprüfungsgesellschaft and Steuerberatungsgesellschaft licenses and is a member of the HLB International global advisory network, enabling cross-border referrals.

Revenue is generated exclusively through fee-based professional services billed on time-and-materials or project basis, covering recurring compliance work (annual audits, tax returns, payroll, bookkeeping) and one-off engagements (due diligence, valuations, restructuring, succession planning). Pricing is per-engagement and not publicly disclosed. Go-to-market is sales-led and relationship-driven, with no self-service or transactional channels; client acquisition relies on named managing-partner introductions, direct advisory engagement, referrals, and HLB network co-advisory. The firm markets through a multi-channel presence including its own website, LinkedIn, Facebook, Instagram, XING, YouTube, webinars, the DDPtaxpert newsletter, and employer branding via Kununu. Ownership is held by managing partners with no external parent company or institutional investment disclosed.

Name

Dr. Dienst & Partner

Legal name

Dr. Dienst & Partner GmbH & Co. KG

Website

https://hlb-ddp.de

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

251–500 employees

Short description

Dr. Dienst & Partner (DDP GRUPPE) is a German multidisciplinary professional services firm founded in 1967 and headquartered in Koblenz, delivering integrated tax advisory, auditing, legal, IT consulting, and management consulting services across nine German offices to mid-market, family-owned, public sector, non-profit, energy, and real estate clients.

Ownership category

akta.pro rank

Product category

Accounting and Advisory Services

NAICS

Offices of Certified Public Accountants (541211), Management Consulting Services (54161), Legal Services (5411)

SIC

Services-Management Consulting Services (8742), Services-Management Services (8741), Services-Legal Services (8111)

akta.pro primary industry

Financial Planning & Analysis Support (Budgeting, Forecasting, Management Reporting) (BPAAAGAJ)

Keywords

• Tax advisory services
• Audit and assurance
• Legal consulting services
• Management consulting services
• IT advisory consulting

Headquarters

HQ city

Koblenz

HQ country

Germany

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Services (Steuerberatung, Wirtschaftsprüfung, Rechtsberatung, IT-Beratung, Consulting): Fee-based professional services billed on time and materials or project basis across tax advisory, statutory and voluntary auditing, legal advisory, IT consulting, and management consulting. Revenue is generated from recurring client relationships as well as one-off engagements such as due diligence, company valuations, and restructuring advisory.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels10 records

Core offering

Dr. Dienst & Partner (DDP GRUPPE) is a German professional services firm offering integrated tax advisory (Steuerberatung), statutory and voluntary auditing (Wirtschaftsprüfung), legal advisory (DDP Legal), IT consulting (DDP.IT Services), and management consulting (DDP Consulting). Services are delivered interdisciplinarily across nine German offices by approximately 100 qualified staff at the Koblenz headquarters, supported by digital tools KanzleiDrive and DDPtaxpert.

Product overview

Dr. Dienst & Partner (DDP GRUPPE) is a full-service professional services firm offering integrated tax advisory, statutory and voluntary auditing, legal advisory, IT consulting, and management consulting. The firm operates as a multi-sub-brand portfolio: its core offerings are Wirtschaftsprüfung (auditing) and Steuerberatung (tax advisory), supported by sub-branded service lines DDP Legal (legal advisory), DDP.IT Services (IT consulting), and DDP Consulting (ESG, CFO, and SAP advisory). Additional digital tools include DDPtaxpert (knowledge/webinar platform) and KanzleiDrive (cloud document management). The group also provides Outsourcing and Konsolidierung (consolidation) services, as well as a specialized Italian Desk for cross-border advisory. All services are delivered across nine German office locations, with approximately 100 employees operating interdisciplinarily.

Differentiator

Problem solved

Functional benefit

Brands

• DDP Legal: Legal advisory services including corporate law, labor law, inheritance law, real estate law, and tax litigation.
• DDP.IT Services
• DDP Consulting
• DDPtaxpert

Products and services

• Wirtschaftsprüfung (Auditing) Statutory and voluntary audit services including annual and consolidated financial statement audits under HGB/IFRS, IT and system audits, internal audit support, special audits (KWK-G, MaBV §16), fraud prevention, and due diligence/expert opinions.
• Steuerberatung (Tax Advisory) Comprehensive tax advisory covering tax returns, financial accounting, payroll (national and international), annual accounts, tax dispute resolution, succession planning, restructuring, real estate tax, public sector taxation, and non-profit organization taxation.
• DDP Legal (Legal Advisory) Legal advisory services covering corporate law, employment law, succession and estate law, real estate law, tax litigation, and contract law, delivered by qualified attorneys in interdisciplinary collaboration with auditors and tax advisors.
• DDP.IT Services (IT Consulting) IT consulting services covering IT infrastructure, network and security, Microsoft 365 environments, DATEV accounting software, ISMS information security management systems, and IT advisory for business process digitalization.
• DDP Consulting (Management Consulting) Management consulting covering holistic ESG advisory (CSRD/ESRS reporting, EU Taxonomy, LkSG, CSDDD), CFO advisory (finance, controlling, treasury, Power BI visualization), and IT application/process consulting (ERP and SAP S/4HANA planning, implementation, and project management).
• DDPtaxpert A proprietary digital tax expertise platform and newsletter offering current tax law updates, webinars, and expert knowledge sharing accessible via the DDPtaxpert portal.
• KanzleiDrive A cloud-based document management and collaboration platform provided by DDP GRUPPE for client document exchange and storage with the firm.
• Outsourcing Outsourcing services for finance and accounting functions, including bookkeeping, payroll processing, and financial statement preparation.
• Konsolidierung (Group Consolidation) Group consolidation services supporting the preparation and review of consolidated financial statements for multi-entity corporate groups.
• Italian Desk Specialized advisory services for Italian-German cross-border business matters, including tax, legal, and regulatory guidance for companies operating in both countries.

Named customers6 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature3 records

Partnerships

Two partnerships are on record, tiered flagship and minor.

• HLB InternationalflagshipStrategic or Co-development PartnerDDP GRUPPE is a member of HLB International, a global network of accounting and advisory firms. This membership enables the firm to serve international clients through the HLB global network and leverage co-development of advisory methodologies and best practices. The partnership logo (HLB Membership Master) is prominently displayed on the website footer.
• Schneider Zien (Erfurt)minorStrategic or Co-development PartnerErfurt location operated in cooperation with Schneider Zien, a partner firm linked via the DDP GRUPPE website navigation under 'Standorte'.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Ebner Stolz: German mid-market audit, tax, legal, and consulting firm with a similar multi-disciplinary model and comparable Mittelstand focus. Ebner Stolz competes head-to-head with DDP for interdisciplinary engagements among listed and family-owned German mid-market companies.
• BDO AG (BDO Germany): Germany operation of BDO International, one of the largest mid-market audit and advisory networks. BDO Germany competes with DDP for Mittelstand audit, tax, and consulting mandates and shares a similar multi-office regional delivery model.
• Mazars Germany: German arm of the Mazars international audit, tax, and consulting network. Mazars competes with DDP for mid-market and listed-company audit engagements in Germany, with overlapping service breadth across tax, audit, and consulting.
• PKF Fasselt: German mid-market audit and tax firm within the PKF International network. PKF Fasselt competes with DDP for regional Mittelstand clients and shares a similar multi-office German delivery footprint.
• Flick Gocke Schaumburg: Leading German tax-focused boutique with deep specialization in international and corporate tax law. Comparable to DDP on the tax advisory side and a relevant competitor for high-end tax advisory and tax litigation mandates.
• Rödl & Partner: German-headquartered international mid-market professional services firm combining audit, tax, legal, and consulting. Rödl's global footprint and Mittelstand focus make it one of the closest peers to DDP, especially on cross-border work where DDP leverages the HLB network.
• Warth & Klein Grant Thornton: German member of the Grant Thornton international network, offering audit, tax, legal, and consulting to German mid-market and family-owned companies. Directly comparable in positioning to DDP GRUPPE, including similar service-line breadth and Mittelstand segment focus.
• Baker Tilly Germany: German member of the Baker Tilly international network providing audit, tax, and consulting to mid-market companies. Baker Tilly Germany is a comparable mid-market alternative for clients seeking an interdisciplinary firm with international reach.

Broad incumbents

• Deloitte Germany: German arm of Big 4 Deloitte, providing audit, consulting, tax, and risk advisory. A broad incumbent competitor that increasingly targets the same Mittelstand and mid-market segments DDP serves.
• KPMG Germany: German arm of Big 4 KPMG, offering a full portfolio of audit, tax, legal, and consulting services. Competes with DDP for larger listed-company and international mandates but at materially greater scale and brand recognition.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@DDPGRUPPE
• Facebookfacebook.com/ddpgruppe
• LinkedInde.linkedin.com/company/hlb-dr-dienst-&-partner-gmbh-&-co-kg
• Instagraminstagram.com/ddp_gruppe
• Xx.com/DienstDr

Revenue estimate

Valuation estimate

Number of profiles

Profiles21 records

Subsidiaries3 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 Dr. Dienst & Partner