IstroSec
Incident response, penetration testing and threat intelligence services, plus the GRYPHON defense product, for European organisations
Highlights
- ProfitableFY2025 net profit €1.2M · RÚZ
- GrowingRevenue +104% YoY (FY2025) · RÚZ
Recent signals
What changed at IstroSec in the last 6 months, newest first. Each line links to its public source.
- 23 Oct 2026 Revenue jump · Revenue €2.6M → €5.3M (+104%) in FY2025 registeruz.sk
About IstroSec
IstroSec is a cybersecurity company that provides incident response, digital forensics, malware analysis, threat intelligence, penetration testing and managed defense services. It also develops GRYPHON, an offline-first defense and incident-response product that the company describes as AI-powered. Its research work covers new cybersecurity incidents, vulnerabilities and malware, and the company reports publishing its own CVEs.
Its customers are SMEs, corporations and governmental entities across industries. Services include SOC Level 3+ managed defense, attack simulations, security audits and advisory, trainings and exercises, and IstroCSIRT 24/7 DFIR services. The company sells these services together with the GRYPHON product.
IstroSec was founded in 2021 and is headquartered in Bratislava, Slovakia, where it operates as an s.r.o. The company presents itself as a European cybersecurity company and lists a range of professional certifications held by its team, including GIAC, OSCP and CISSP.
Product: GRYPHON, an offline-first defense and incident-response product, alongside incident response, pentesting, threat intelligence and managed defense services.
Financials
| FY2025 | FY2024 | FY2023 | FY2022 | FY20216 months | |
|---|---|---|---|---|---|
| Revenue | €5.3M | €2.6M | €1.9M | €1.0M | €63k |
| Growth | +104% | +38% | +86% | — | — |
| EBITDA | €1.4M | €379k | €772k | €180k | €2k |
| Operating profit | €1.4M | €363k | €759k | €176k | €2k |
| Net profit | €1.2M | €345k | €727k | €127k | €214 |
| Net margin | 22.3% | 13.2% | 38.4% | 12.5% | 0.3% |
| Personnel costs | €1.8M | €1.2M | €648k | €428k | €28k |
| Total assets | €7.7M | €2.0M | €1.1M | €485k | €29k |
| Cash | €5.8M | €586k | €503k | €106k | €26k |
| Liabilities | €1.7M | €1.4M | €275k | €332k | €23k |
| Equity | €1.6M | €406k | €819k | €153k | €5k |
As filed with RÚZ (Slovak register of financial statements). Each year links to its statement.
Public contracts
Contracts IstroSec signed since 1 Nov 2024, from the Slovak and Czech public contract registers. Values as published; amendments are not counted.
Customers
17 contracts with 11 buyers · €2.9M
| Contracts | Value | |
|---|---|---|
| Univerzita Pavla Jozefa Šafárika v Košiciach | 2 | €1.7M |
| Úrad vlády Slovenskej republiky, Úrad podpredsedu vlády, ktorý neriadi ministerstvo v zastúpení Ministerstvo hospodárstva Slovenskej republiky | 1 | €793k |
| Ministerstvo financií SR | 3 | €141k |
| Národná agentúra pre sieťové a elektronické služby | 1 | €139k |
| Národný bezpečnostný úrad | 1 | €10k |
| Univerzitná nemocnica Bratislava | 1 | €8k |
| Železničná spoločnosť Cargo Slovakia, a.s. | 2 | — |
| MH Teplárenský holding, a.s. | 1 | — |
Open public tenders for IstroSec →
Suppliers
5 contracts with 3 suppliers · €21k
| Contracts | Value | |
|---|---|---|
| Kompetenčné a certifikačné centrum kybernetickej bezpečnosti | 2 | €20k |
| Žilinská univerzita v Žiline | 1 | €918 |
| Slovenská elektrizačná prenosová sústava, a.s. | 2 | — |
Latest contracts
- 3 Nov 2026 for Železničná spoločnosť Cargo Slovakia, a.s. · Business Impact Analysis (BIA) a Business Continuity Management (BCM) register
- 28 Sep 2026 from Slovenská elektrizačná prenosová sústava, a.s. · Dohoda o zachovávaní mlčanlivosti register
- 31 Jul 2026 for Železnice Slovenskej republiky · ZMLUVA O POSKYTOVANÍ SLUŽIEB INCIDENT RESPONSE register
- 11 Mar 2026 from Žilinská univerzita v Žiline · ZMLUVA o nájme nebytových priestorov č. 5/2006 · €918 register
- 2 Feb 2026 for Ministerstvo financií SR · Zmluva o poskytovaní expertnej podpory v oblasti kybernetickej bezpečnosti a služieb riešenia kybernetických bezpečnostných incidentov · €67k register
- 2 Feb 2026 from Kompetenčné a certifikačné centrum kybernetickej bezpečnosti · Memorandum o spolupráci · €10k register
Jobs at IstroSec
Leadership
- Henrich Slezák · Konateľ (Managing director)Source: business register
- Lukáš Hlavička · Konateľ (Managing director)Source: business register
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Website technologies
Tools and platforms detected on this company’s website, grouped by purpose. Dates record when Evolc observed them.
Analytics
- Google Analytics 4Medium confidence
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Detection evidence
- Integration code on pageinitialization/configuration expression
- Integration code on pageinitialization/configuration expression
- Integration code on pageinitialization/configuration expression
Content delivery
- CloudflareHigh confidence
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Detection evidence
- Website resourcedeclared script/iframe or software asset
- Response headerserver
Frontend frameworks
- BootstrapHigh confidence
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- Website resourcedeclared script/iframe or software asset
- jQueryHigh confidence
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- Website resourcedeclared script/iframe or software asset
Privacy & consent
- OsanoHigh confidence
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Detection evidence
- Website resourcedeclared script/iframe or software asset
Website detection does not establish a paid subscription or company-wide use. Tools loaded after consent or sign-in may be missed. “No longer observed” does not prove the company stopped using a tool.