Türkiye's Trusted Cybersecurity Partner
Since 2003, we have delivered TSE-certified penetration testing and information security services across Türkiye's most sensitive systems — from government agencies to the defense industry, from finance to telecommunications.
Corporate
Who We Are
NESİL Grup Teknoloji A.Ş. delivers end-to-end cybersecurity and information security management services to critical sectors — chiefly public institutions, the defense industry, finance, and telecommunications.
In offensive security, backed by our TSE Class-A and internationally recognized certifications, we lead the sector in Red Team operations. With the innovative, homegrown solutions developed at the R&D center within our Technopark, we proactively strengthen organizations' digital security:
- AI-Powered Penetration Testing Platform: A next-generation automation infrastructure that detects vulnerabilities rapidly and in depth.
- Homegrown Voice Phishing (Vishing) Solution: A training and awareness platform that reinforces the human factor through social engineering and voice-attack simulations.
- Çerezgo Privacy Center: A comprehensive data-privacy and legal-compliance management hub for digital assets.
With our national R&D vision, strong engineering team, and world-class expertise, we raise organizations' cyber resilience to the highest level.
Accreditation
TSE Class A Penetration Testing Certificate
The highest level of penetration testing accreditation in Türkiye, held by only a select group of firms.
Certificate Information
Certificate No: TSE-STF-065
Standard: TS 13638 / T2
Class: Class A Authorization
NESİL Teknoloji is accredited by TSE under the TS 13638/T2 standard as a Class A Penetration Testing Firm . This certification covers the authority to deliver penetration testing services to government agencies, municipalities, critical infrastructure operators, and defense industry organizations.
Class A authorization is TSE's highest assessment category for technical competence, methodological rigor, and corporate reliability. Where public tenders require a TSE-certified penetration testing firm , NESİL Teknoloji is among the authorized providers.
Penetrasyon testlerimiz OWASP, PTES and OSSTMM methodologies govern every engagement. Each finding is reported with a CVSS v3.1 score and PoC evidence.
Why NESİL
What Sets Us Apart
TSE Class A Authorization
One of the accredited firms eligible to serve where public tenders legally require it.
Certified Team
Ethical hackers holding CEH, OSCP, CISSP, and CISA certifications. Technical skill proven in the field.
CVSS Reporting
Every finding is reported with a CVSS v3.1 score, exploit evidence, and a prioritization matrix.
End-to-End Process
From testing to remediation, compliance to ISO certification — managed under one roof.
Events
Recent Events
Highlights from conferences, partnerships, and industry events.
Data Protection Authority Conference
An industry gathering on personal data protection
KVKK Event
Compliance and awareness panel
Turkcell Partnership
Strategic cybersecurity partnership
TED Event
Digital transformation and cybersecurity
Industry Talk
Cybersecurity and data protection
Industries
Industries We Serve
Cybersecurity services for 1,200+ enterprise clients across 40+ industries.
Documents
Corporate Documents
Learn more about the NESİL Teknoloji service portfolio.