Onsteel Oy

OnSteel is a subcontracting workshop in Finland.

Industrial Machinery Manufacturing

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Headquarters: Karstula, Central Finland, FinlandSource: RevenueBaseRetrieved October 13, 2026
Employee range: 51 to 200Source: RevenueBaseRetrieved October 13, 2026
Founded: 2015Source: RevenueBaseRetrieved October 13, 2026
Published list appearances: 2 supported appearances ↗Source: RevenueBase lists

The company at a glance

What does Onsteel Oy do?

OnSteel specializes in light- to medium-heavy machining, assembly, testing, and finishing. OnSteel builds special-purpose machines for its customers.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

Who it serves

Its customers are closely associated with pulp and paper, energy and environment technology, and offshore products.

What the business offers

Services & capabilities.

Machining, assembly, testing, and finishing

Services specialize in light- to medium-heavy machining.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

#16OF 24

Finland

Mechanical assembly companies

Snapshot: September 19, 2026

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#18OF 25

Finland

Machinery assembly services

Snapshot: September 16, 2026

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Positions describe ordering within each source list. See how lists are built ↗

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Onsteel Oy

#16 Mechanical assembly companies

Snapshot: September 19, 2026

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<a href="https://revenuebase.ai/companies/mechanical-assembly-companies/finland" target="_blank" rel="nofollow noopener">
  <img src="https://revenuebase.ai/companies/profiles/onsteel/recognition-companies-mechanical-assembly-companies-finland-20260920-d39d87396169209f305e7998409f6dffb10190d7baa2a26c992d4a6a9156d170.svg" alt="Onsteel Oy listed #16 on Mechanical assembly companies, September 19, 2026" width="220" height="319" style="max-width:100%;height:auto;" />
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Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 16, 2026 and September 19, 2026. How the company lists are built.

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