Inside Estonian defence tech (2026)
Mar 2
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G
Guardtime
Blockchain-based cybersecurity infrastructure securing military, government, and ESA space systems with keyless signature technology.
Founded 2007201-500 employeesTallinn, Estonia0 open positionsWebsite
Cybersecurity
Products & Solutions
KSI Blockchain
KSI Blockchain
Industrial-scale blockchain platform using hash-function cryptography to verify data integrity, provenance, and time of existence without private keys or trusted administrators, securing over one million Estonian healthcare records and all national government registries.
Active Integrity
Active Integrity
Continuous data integrity verification system that detects manipulation of firmware, operating systems, network configurations, and event logs in real time, with automated alerting and mitigation capabilities.
NATO Cyber Range Platform
NATO Cyber Range Platform
Automated planning and control platform for the NATO Cyber Range that reduces the effort required to prepare and execute large-scale cyber exercises, trainings, and certification events for up to 3,000 participants from 38 nations.
About
Estonian deep-tech company founded in 2007 that developed KSI Blockchain, a keyless signature infrastructure used by NATO, the Estonian government, and the US Department of Defense for data integrity verification at massive scale. Guardtime's hash-based cryptography secures national registries across Estonia's e-governance systems including e-health, e-law, and e-court.
Offices
TallinnTartuAmsterdamLausanneAbu Dhabi
Customers & Partners
NATOEstonian GovernmentUS Department of DefenseEuropean Space AgencyVerizonLockheed MartinEricssonDutch GovernmentUS Department of EnergyESA C-SOC ConsortiumCR14 FoundationPacific Northwest National Labs
Open Positions (0)
No positions available
Guardtime doesn't have any open positions at the moment.
G
Guardtime
Blockchain-based cybersecurity infrastructure securing military, government, and ESA space systems with keyless signature technology.
Founded 2007201-500 employeesTallinn, Estonia0 open positionsWebsite
Cybersecurity
Products & Solutions
KSI Blockchain
KSI Blockchain
Industrial-scale blockchain platform using hash-function cryptography to verify data integrity, provenance, and time of existence without private keys or trusted administrators, securing over one million Estonian healthcare records and all national government registries.
Active Integrity
Active Integrity
Continuous data integrity verification system that detects manipulation of firmware, operating systems, network configurations, and event logs in real time, with automated alerting and mitigation capabilities.
NATO Cyber Range Platform
NATO Cyber Range Platform
Automated planning and control platform for the NATO Cyber Range that reduces the effort required to prepare and execute large-scale cyber exercises, trainings, and certification events for up to 3,000 participants from 38 nations.
Open Positions (0)
No positions available
Guardtime doesn't have any open positions at the moment.
About
Estonian deep-tech company founded in 2007 that developed KSI Blockchain, a keyless signature infrastructure used by NATO, the Estonian government, and the US Department of Defense for data integrity verification at massive scale. Guardtime's hash-based cryptography secures national registries across Estonia's e-governance systems including e-health, e-law, and e-court.
Offices
TallinnTartuAmsterdamLausanneAbu Dhabi
Customers & Partners
NATOEstonian GovernmentUS Department of DefenseEuropean Space AgencyVerizonLockheed MartinEricssonDutch GovernmentUS Department of EnergyESA C-SOC ConsortiumCR14 FoundationPacific Northwest National Labs
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