Onesti
- Company typePrivate
- Founded1987
- HeadquartersLeusden, Netherlands
- Headcount1–10
- GTM typeB2B
- OfferingServices
What Onesti does
Join Administraties (referred to in the source data under the company name 'Onesti') is a privately held Dutch accounting and tax services firm incorporated in the Netherlands (KVK 97005967; BTW NL867871106B01). It operates a network of administrative offices across six Dutch cities — Amsterdam, Barendrecht, Heerenveen, Houten, Leusden, and Utrecht (the latter designated as the main office) — and targets Dutch entrepreneurs and small business owners as its primary customer segment. Its offering is structured around two service pillars: recurring financial administration (taking over part or all of a client's bookkeeping using modern software for efficiency) and project-based fiscal advisory covering tax filings, legal form advice, and business succession planning. The firm also runs the Join Netwerk, an alliance program that invites other Dutch accounting offices to join under the Join Administraties brand, sharing knowledge and professional support while preserving each member office's client-facing personal service.
Onesti firmographics
Firmographics- Name
- Onesti
- Legal name
- Join Administraties
- Website
- https://onesti.nl
- Company type
- Private
- Founded year
- 1987
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Where Onesti is headquartered
LocationHeadquarters
- HQ city
- Leusden
- HQ country
- Netherlands
- HQ region
- Europe
Offices6 records
Markets served
Onesti business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Financial Administration Services: Ongoing financial administration services taking over part or all of clients' financial record-keeping, using modern software for efficiency. Revenue likely recurring through retainer or periodic billing arrangements.
- Tax Advisory Services: Fiscalists provide tax consultation covering tax returns, legal form advice, and business succession planning. One-time or periodic project-based engagements.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Onesti product offering
Product offeringCore offering
Join Administraties is a Dutch network of accounting offices that provides financial administration services (full or partial bookkeeping for entrepreneurs) and fiscal advisory services, including tax filings, advice on legal business structures, and business succession planning. The firm operates across six office locations in the Netherlands, combining modern accounting software with personal consultation delivered by fiscalists and administrative specialists.
Product overview
Join Administraties is an accounting and financial services firm that operates as a network of multiple administrative offices. The company offers core financial administration services and fiscal advisory services, supplemented by a Join Netwerk program that allows other accounting firms to join the network and benefit from shared resources and expertise. The offering is structured around personal service combined with the advantages of a broader professional network.
Differentiator
Problem solved
Functional benefit
Products and services
- Financial Administration Services Comprehensive financial administration services that take over all or partial aspects of a client's business bookkeeping, using modern software to deliver organized and efficient financial record management. Aimed at Dutch entrepreneurs who want to outsource their bookkeeping.
- Fiscal Services Tax advisory services covering all fiscal questions, advice on legal business structures (rechtsvormen), preparation and filing of tax returns (aangiftes), and business succession planning. Delivered by in-house fiscalists for Dutch entrepreneurs and business owners.
- Join Netwerk (Partner Network Program) A partnership program for independent accounting offices to join the Join Administraties brand, sharing knowledge, experience, and professional support while retaining personal client attention. Aimed at Dutch administrative offices seeking to scale through a collective network.
Companies that use Onesti
Customer profileSegments1 record
Ideal customer profiles2 records
Onesti technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Onesti partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Join Netwerk (Member Offices)coreThe Join Netwerk is a strategic alliance of multiple accounting offices that have joined under the Join Administraties brand. Member offices benefit from shared knowledge, experience, and professional support while maintaining personal attention for their own clients. The model creates collective strength through collaboration while preserving the personal touch.
Scale indicators1 record
Recent moves1 record
Expansion highlights4 records
Onesti competitors and assessment
Company assessmentMarket position
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Onesti social profiles
Digital presenceOnesti financial estimates
Financial estimateRevenue estimate
Valuation estimate
Onesti leadership team
Management profileNumber of profiles
Onesti funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Onesti M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Onesti
What does Onesti do?
Join Administraties is a Dutch network of accounting offices that provides financial administration services (full or partial bookkeeping for entrepreneurs) and fiscal advisory services, including tax filings, advice on legal business structures, and business succession planning. The firm operates across six office locations in the Netherlands, combining modern accounting software with personal consultation delivered by fiscalists and administrative specialists.
Is Onesti a public or private company?
Onesti is a private company. It is classified as unknown and is currently operating.
When was Onesti founded?
Onesti was founded in 1987. It employs 1 to 10 people.
Where is Onesti based?
Onesti is headquartered in Leusden, Netherlands, in the Europe region.
How does Onesti make money?
Two revenue lines are on record. Financial Administration Services are the primary driver. The others are tax Advisory Services.
Does Onesti have an API?
No public API is recorded for Onesti.