Company lists · Data refreshed September 2026

Top 22 Infrastructure design firms based in Finland

RevenueBase identified 38 infrastructure design firms headquartered in Finland as of September 2026 and tracks 1,195 professional contacts across them, including 777 with verified work emails. Helsinki is the largest hub.

This list covers infrastructure design firms headquartered in Finland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review
38Companies
1,195Contacts tracked
777Verified emails
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The 22 largest infrastructure design firms based in Finland

Ranked by team size
Top 22 of 38 infrastructure design firms based in Finland, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 2026501-1,000580 contacts →

Indirect evidence

“Olemme yksi maailman johtavista asiantuntijayrityksistä.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 2026201-500220 contacts →

Indirect evidence

“Fimpec is a top expert specializing in consulting, project management and engineering.”

Source: RevenueBase Database · checked Sep 20, 2026
3Indirect evidenceEspoo, FinlandHQ checked Sep 20, 2026n/a74 contacts →

Indirect evidence

“Vahanen-yhtiöt on nyt osa AFRYä.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 202651-20073 contacts →

Indirect evidence

“Me Finnmap Infrassa olemme mukana luomassa tulevaisuuden yhdyskuntia ja liikenneverkkoa.”

Source: RevenueBase Database · checked Sep 20, 2026
5Indirect evidenceTurku, FinlandHQ checked Sep 20, 202651-20039 contacts →

Indirect evidence

“Suunnittelupalvelut, sekä asiantuntijapalvelut teollisuuteen.”

Source: RevenueBase Database · checked Sep 20, 2026
6Indirect evidenceFinlandHQ checked Sep 20, 202611-5037 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
7Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 202611-5020 contacts →

Indirect evidence

“Olemme Suomen johtavia sähkötekniseen suunnitteluun erikoistuneita toimistoja.”

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 202651-20018 contacts →

Indirect evidence

“The RE Group is a multidisciplinary consulting and engineering company, working as a long-term cooperation partner with clients worldwide.”

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 2026201-50017 contacts →

Indirect evidence

“Hei me muutetaan: Optiplan saa uuden kodin 1.6.”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidencePennala, FinlandHQ checked Sep 20, 202651-20016 contacts →

Indirect evidence

“Rehellisyys maan perii.”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceTuusula, FinlandHQ checked Sep 20, 202651-20010 contacts →

Indirect evidence

“STM Infra Oy on valtakunnallisesti toimiva infra- ja pohjarakentaja, joka toteuttaa laajoja hankkeita niin julkiselle kuin yksityiselle sektorille.”

Source: RevenueBase Database · checked Sep 20, 2026
12Indirect evidenceOulu, FinlandHQ checked Sep 20, 202611-509 contacts →

Indirect evidence

“Tarjoamme infran eri sektoreilla rakennuttamis- ja asiantuntijapalveluita hankkeen valmistelusta takuuajan tehtäviin saakka.”

Source: RevenueBase Database · checked Sep 20, 2026
13Partial evidenceIisalmi, FinlandHQ checked Sep 20, 202611-509 contacts →

Partial evidence

“Savolainen Insinööritoimisto Oy is a steadily growing expert in construction, providing construction design and consulting services; architectural and structural design services…”

Source: RevenueBase Database · checked Sep 20, 2026
14Indirect evidenceHelsinki, FinlandHQ checked Sep 20, 202611-508 contacts →

Indirect evidence

“Terranor Verte Oy tarjoaa luotettavaa kumppanuutta asiakkailleen.”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceRaseborg, FinlandHQ checked Sep 20, 202651-2005 contacts →

Indirect evidence

“Mittavat infraurakat, haastava väylärakentaminen ja taitava insinööriosaaminen kuvaavat meitä parhaiten.”

Source: RevenueBase Database · checked Sep 20, 2026
16Indirect evidenceKouvola, FinlandHQ checked Sep 20, 202611-504 contacts →

Indirect evidence

“TSP Engineering Oy on alkuvuonna 2016 perustettu suunnittelutoimisto, jonka kotipaikka on Kouvola.”

Source: RevenueBase Database · checked Sep 20, 2026
17Partial evidenceTampere, FinlandHQ checked Sep 20, 202611-502 contacts →

Partial evidence

“As of April 1, 2021, we have become part of AFRY, a European leader in engineering, design, and advisory services, with a global reach.”

Source: RevenueBase Database · checked Sep 20, 2026
18Indirect evidenceLahti, FinlandHQ checked Sep 20, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
19Indirect evidenceOulu, FinlandHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Palveluja ovat verkosto, teollisuus ja rakennussähkösuunnittelu sekä LVI- ja automaatiosuunnittelu sekä näiden kaikkien toimialojen konsultointitehtävät.”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceLappeenranta, FinlandHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Diopco is a consulting company focusing on civil enginering and project management.”

Source: RevenueBase Database · checked Sep 20, 2026
21Indirect evidenceTampere, FinlandHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Suoritamme suunnitteluun ja rakentamiseen liittyviä asiantuntijatehtäviä nopeasti ja luotettavasti.”

Source: RevenueBase Database · checked Sep 20, 2026
22Indirect evidenceEspoo, FinlandHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Prekon Oy on infrahankkeiden projektinjohdon ja suunnittelunohjauksen asiantuntijayritys.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 22 of 38 infrastructure design firms based in Finland

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Infrastructure design firms based in Finland at a glance

As of Sep 20, 2026
65.0%Verified-email coverage
31.4Average contacts per company
11-50Median size (employees)
28.9%Largest-city concentration · Helsinki
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
15
11-50
9
51-200
6
201-500
2
501-1,000
1
1,001-5,000
1
10001+
2

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 38 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among infrastructure design firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Finland whose own description of what they do matches “infrastructure design firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names infrastructure design firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among infrastructure design firms, and records with no verified work email. Companies headquartered outside Finland are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 777 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names infrastructure design firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many infrastructure design firms are there based in Finland?

RevenueBase identified 38 infrastructure design firms headquartered in Finland as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

WSP In Finland, headquartered in Helsinki, tops this list with the largest team on record.

Which city has the most infrastructure design firms?

Helsinki leads with 11 headquartered companies, followed by Oulu (4) and Lappeenranta (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 777 verified decision-maker contacts tracked across these 38 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.