This list features large critical infrastructure operators in Estonia, predominantly based in Tallinn. These companies are primarily active in banking, financial services, and telecommunications, alongside other essential sectors. Examples include Luminor Group, providing banking services across the Baltics; EMT, a leader in Estonian mobile communication; and Eesti Energia, an international energy company focused on renewable energy and sustainability. The list also includes Tallink Grupp, which operates passenger and cargo transport services in the Baltic Sea.
A notable pattern is the concentration of these critical infrastructure operators in Estonia's capital, Tallinn. Many of these companies, such as LHV, founded in 1999, and Bigbank, established in 1992, have a history spanning several decades, indicating established operations within their respective fields.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Luminor Groupluminor.ee
Providing accessible, fast, and reliable banking services to individuals and businesses across the Baltic region with local expertise. |
1,799 | |||
| 2 |
Swedbank Estoniaswedbank.ee
A leading bank in the Nordic and Baltic countries, focusing on simplicity, openness, and responsibility to help customers grow financially |
1,278 | |||
| 3 | 1,011 | ||||
| 4 | 961 | ||||
| 5 |
Eesti Energiaenefit.ee
International energy company increasing renewable energy production, promoting sustainability, and transforming shale industry into circular economy-based chemical industry. |
818 | |||
| 6 |
Tallink Grupptallink.com
Passenger and cargo transport services in the Baltic Sea region, operating ferries, hotels, and Burger King restaurants in Baltics. |
703 | |||
| 7 | 641 | ||||
| 8 |
eu-LISAeulisa.europa.eu
Operates and manages large-scale IT systems for EU border management, asylum, migration policies, and criminal records information to ensure interoperability |
588 | |||
| 9 |
Bigbankjobs.bigbank.eu
Specializing in term deposits and consumer loans, this bank operates across multiple countries, offering personalized services to clients |
531 | |||
| 10 |
Põhja-Eesti Regionaalhaiglaregionaalhaigla.ee
A leading hospital in Estonia with a mission to invest in people's health in the Northern region |
480 | |||
| 11 |
Elisa Eesti ASelisa.ee
A leading provider of telecommunication and ICT services in Estonia, offering mobile, internet, TV services, and IT infrastructure solutions for businesses and public sector |
419 | |||
| 12 | 402 | ||||
| 13 | 392 | ||||
| 14 |
ENEFITenefit.com
An international energy provider offering electricity, gas, and liquid fuels in the Baltic States, Finland, Poland, and beyond Commitment to environmentally-friendly energy solutions |
388 | |||
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| 15 |
Tartu University Hospitalkliinikum.ee
Leading healthcare provider in Estonia offering a wide range of medical specialties, including prenatal care, organ transplants, and education for healthcare professionals |
343 | |||
| 16 |
Ida-Tallinna Keskhaiglaitk.ee
A leading hospital in Tallinn with seven clinics offering diagnostic, surgical, rehabilitation, and nursing services, focusing on patient-centered innovative healthcare |
342 | |||
| 17 |
Coop Pank AScooppank.ee
Estonian bank serving tens of thousands of Estonians, focusing on individuals and small to medium-sized businesses Offers simple everyday banking and financing products |
314 | |||
| 18 |
Politsei- ja Piirivalveametkarjaar.politsei.ee
An organization offering a variety of roles in law enforcement and related fields, emphasizing a strong sense of community and dedicated employees |
302 | |||
| 19 |
Eleringelering.ee
An integrated operator connecting electricity and gas producers, network operators, and consumers, ensuring high-quality energy supply with reasonable costs |
228 | |||
| 20 |
Registrite ja Infosüsteemide Keskus (RIK) // Centre of Registers and Information Systemsrik.ee
An experienced developer and administrator of public sector IT-systems, providing innovative e-services for efficient governmental administration, law, and criminal jurisdiction worldwide |
213 | |||
| 21 |
Riigi Infosüsteemi Amet // Estonian Information System Authority (NCSC-EE)ria.ee
National competence center for digital infrastructure, cybersecurity, e-government services, managing Internet network, securing e-elections, and promoting Estonian digital identity globally. |
202 | |||
| 22 |
Tallinn Airport (TLL)airport.ee
Operates and develops airports in Estonia, with a focus on enhancing passenger experience and providing services to airlines and cargo companies |
199 | |||
| 23 |
AS Eesti Raudtee / Estonian Railways Ltdevr.ee
State-owned railway operator managing railway administration, infrastructure maintenance, traffic management, and cross-border cooperation for smooth operation and development since 2009 |
185 | |||
| 24 |
ERGO Insurance SE (ERGO Eesti)ergo.ee
Offers a wide range of insurance products including life, health, pension, and asset insurance through an extensive sales network in Estonia |
181 | |||
| 25 |
CF&S Groupcfs.net
A professional logistics company offering road, railway, sea, and air transport solutions with a focus on efficiency, flexibility, and cutting-edge technology |
87 | |||
| 26 |
Tallinna Linnatransporttlt.ee
The company aims to provide convenient and eco-friendly urban transportation options, serving over 100 million passengers annually with a focus on public transport services |
79 | |||
| 27 |
Citadele pankcblgroup.com
Universal bank offering a wide range of banking products, wealth management, insurance, leasing, and innovative financial technology services mainly in the Baltic region |
73 | |||
| 28 |
Elelevielelevi.ee
A company that generates renewable energy and operates public electric vehicle charging stations |
4 | |||
| 29 |
Enefit Voltenefitvolt.com
Estonia's largest electric vehicle public charging network with fast chargers, home & business solutions, and green energy focus for a sustainable future |
2 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
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