What Tadellos OÜ does

Tadellos OÜ is an Estonian private limited company (registrikood: 10487003) providing professional accounting, auditing, and review services to businesses primarily in the Jõhvi and Tallinn regions. Founded in 1998, the firm operates three core service lines: Raamatupidamine (bookkeeping/accounting), Audit (full audit services compliant with Estonian law and international standards), and Ülevaatus (review/limited assurance engagements). Accounting services are delivered either digitally or on-site at the company's Jõhvi headquarters (Keskväljak 9, Jõhvi, 41531), while audit services are executed through the wholly-owned subsidiary ST& Partners OÜ (registrikood: 14412108), which employs a sworn auditor (vandeaudiitor) and assistant.

The business model is straightforward professional services revenue with undisclosed pricing; clients contact the firm directly for quotes via [email protected] or phone. The team is described as "highly educated specialists" but specific headcount is not disclosed. There is no proprietary technology platform, software product, app, or API—the firm operates as a traditional accounting practice that has adopted digital delivery alongside in-person service. Marketing is limited to a single Facebook page (profile ID: 61584797123254); no paid advertising, content marketing, or SEO presence is evident. No AI/ML capabilities are disclosed.

Tadellos OÜ is privately held with no disclosed external investors, funding rounds, or M&A activity, and no parent company. The customer base is a horizontal segment of Estonian SMBs requiring compliance with local accounting regulations and statutory audit obligations. Operating geographies are limited to Estonia, with service areas in Jõhvi and Tallinn but no global footprint claim. Contact channels consist of a single email and phone number; no management team, leadership bios, or formal corporate structure beyond the ST& Partners OÜ subsidiary is publicly disclosed.

Name

Tadellos OÜ

Legal name

Tadellos OÜ

Website

https://tadellos.ee

Company type

Private

Founded year

1998

Operating status

Operating

Short description

Tadellos OÜ is an Estonian accounting and audit firm founded in 1998, providing bookkeeping, statutory audit, and review services to businesses primarily in the Jõhvi and Tallinn regions via digital and on-site delivery.

Ownership category

akta.pro rank

Product category

Accounting and Audit Services

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Offices of Certified Public Accountants (541211)

akta.pro primary industry

Accounting & Bookkeeping Services (BPAHABAC)

Keywords

• Accounting services
• Audit services
• Bookkeeping services
• Financial reporting
• Review engagements

Headquarters

HQ city

Jõhvi

HQ country

Estonia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations

Revenue model

1. Accounting Services: Professional bookkeeping services offered digitally or on-site at office locations. Services provided since 1998 to business clients.
2. Audit Services: Professional audit solutions compliant with Estonian laws and international standards, as well as review services (limited assurance engagements). Audiitor services are provided through partner ST& Partners OÜ since 2005.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels1 record

Core offering

Tadellos OÜ provides professional accounting (bookkeeping) and audit services to Estonian businesses. Bookkeeping is delivered digitally or on-site at the Jõhvi office, while statutory audit and limited-assurance review engagements are performed through partner ST& Partners OÜ, which employs a sworn auditor and assistant. The firm has been operating since 1998, with audit services added via the ST& Partners OÜ partnership from 2005.

Product overview

Tadellos OÜ operates as a professional accounting and audit services firm offering three interconnected service lines: Raamatupidamine (accounting/bookkeeping), Audit (full audit services), and Ülevaatus (review/inspection services). The accounting services serve as the foundational offering for daily financial record management, while audit and review services provide varying levels of assurance for businesses requiring external validation of their financial statements. Services are delivered digitally or on-site, with audit services subcontracted to ST& Partners OÜ (registrikood: 14412108) where certified auditors are employed.

Differentiator

Problem solved

Functional benefit

Products and services

• Raamatupidamine (Accounting/Bookkeeping) Professional bookkeeping and financial record management services for Estonian businesses, including compliance-related accounting tasks. Delivered digitally or on-site at the firm's Jõhvi office, with a service presence also in Tallinn.
• Audit Professional statutory audit solutions compliant with Estonian law and international standards, delivered through partner ST& Partners OÜ where a sworn auditor and assistant perform the engagement work. Targeted at Estonian businesses requiring full statutory audits.
• Ülevaatus (Review)

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• ST& Partners OÜcoreStrategic or Co-development Partner · 1 January 2005ST& Partners OÜ (registrikood: 14412108) is a strategic partner providing sworn auditor services. Since 2005, Tadellos OÜ has been referring/providing audit services through this partner, which employs a sworn auditor (vandeaudiitor) and assistant. This partnership enables Tadellos to offer comprehensive audit services compliant with Estonian and international standards.

Scale indicators1 record

Recent moves4 records

Expansion highlights3 records

Direct peers

• BDO Eesti: BDO Eesti is the Estonian member of BDO Global, a mid-tier international accounting and audit network offering bookkeeping, audit, tax, and advisory services to Estonian businesses — directly comparable in service mix and target market to Tadellos.
• RSM Baltics: RSM's Baltic member firms provide audit, tax, and consulting to mid-market companies in Estonia, Latvia, and Lithuania. Similar to Tadellos in service offering and segment focus on growing businesses.
• Baker Tilly Baltics: Baker Tilly's Baltic practice serves SMB and mid-market clients with assurance, tax, and advisory services across the region. Comparable to Tadellos in scale, service lines, and target customer profile within the Baltics.
• Mazars Estonia: Mazars is an international mid-tier accounting and audit firm with presence in the Baltics. Comparable to Tadellos as a mid-sized international professional services firm offering audit and assurance to mid-market clients.
• Crowe Estonia: Crowe Global's Estonian member firm provides audit, tax, and advisory services to mid-market clients. Similar in scale and service mix to Tadellos's positioning within the Estonian professional services market.
• Grant Thornton Baltic: Grant Thornton's Baltic offices provide audit, tax, and advisory services across Estonia, Latvia, and Lithuania. Directly comparable as a mid-tier international professional services firm targeting mid-market clients.

Broad incumbents

• EY Estonia: Ernst & Young's Estonian practice is a Big 4 accounting and advisory firm. Overlaps with Tadellos on audit and assurance services, but serves larger enterprise clients as part of a global portfolio.
• PwC Estonia: PwC's Estonian office is part of the global Big 4 firm offering audit, tax, and advisory. Directly comparable service lines (audit, accounting advisory) but operates at materially larger scale and brand recognition than Tadellos.
• Deloitte Eesti: Deloitte's Estonian practice is part of a global Big 4 firm providing audit, consulting, tax, and advisory services. Comparable in service category but operates at significantly larger scale than Tadellos.
• KPMG Baltics (Estonia): KPMG's Estonian practice is part of a global Big 4 firm offering audit, tax, and advisory services. Overlaps with Tadellos on audit and assurance, but operates at much larger scale and broader portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/profile.php?id=61584797123254

Revenue estimate

Valuation estimate

Number of profiles

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 Tadellos OÜ