Zerolynx

Zerolynx is an independent testing company founded in 2018, headquartered in Alcorcón, Spain, with 51-200 people. It offers Penetration testing, Red teaming. It publishes no rate card. Data checked on September 3, 2026.

Profile checkedSeptember 3, 20269 sourceszerolynx.com

Best suited for

Nearshore for the EU
Zerolynx delivers from Spain.
At least one delivery location in the EU or the EEA, or in Ukraine, Georgia, Serbia or Moldova.

Facts

Comparable facts about Zerolynx. Every field is shown, including the ones the company has not published.
Headquarters	Alcorcón, Spain
Delivery locations	Spain
Team size	51-200 people
Founded	2018
Ownership	Independent
Services	Penetration testing, Red teaming
Industries	Not published
Frameworks	Not published
Engagement models	Not published
Client stages	Not published
Certificates	No certificate confirmed by a register entry
Signs a BAA / GDPR DPA	Not confirmed / Not confirmed
Published rates	Not published
Minimum project	Not published
Onboarding	Not published
Crowd tester pool	Not published
Device lab	Not published

Certificates the company claims

ISO/IEC 27001claimedcompany page

These certificates are not confirmed by a registry entry, a certificate document or an auditor report. Each one is what the company says about itself on the page linked beside it, read on the date shown there. They are listed apart from confirmed certificates and are not counted anywhere the catalog counts certificates: not in the rankings tables, not in the applicability tags, not in comparisons.

Reviews on external platforms

No external review profile found.

This catalog collects no reviews of its own. Review counts and scores are aggregates from external platforms, shown with the date they were read.

Named clients

No client named in a public source.

Rankings this company appears in

Type of testing: Penetration testing position 26 of 41
Type of testing: Red teaming position 13 of 24
Delivery location: Spain position 10 of 10
Delivery location: Europe position 57 of 72
Delivery proximity: nearshore for a buyer in the EU position 57 of 57

Sources

Zerolynx: Sobre nosotros / About us (company overview, HQ address, services, certifications displayed)Checked on September 3, 2026
Infosalus (press release wire): "Los fundadores de Zerolynx se hacen con el 100% de la compañía tras crecer un 19% en el último año"Checked on September 3, 2026. Announces founders Juan Antonio Calles and Daniel González completed a buyback of 100% of company capital, published 2026-05-05. Founded 2018. 2025 revenue €3M, up 19.2% year over year (revenue growth, not headcount).
RevistaByte: "Los fundadores de Zerolynx adquieren el 100% de la compañía"Checked on September 3, 2026. Corroborates 100% buyback by founders, founded 2018, 2025 revenue €3M (+19.2%), CISOaaS offering, Madrid HQ relocating within 2026. Does not name the prior non-founder shareholder.
Techla Media: "Cybertix integra a Zerolynx y se erige como referente de servicios automatizados de ciberseguridad en PYMEs"Checked on September 3, 2026. Reports Cybertix's acquisition/integration of Zerolynx, signed 2025-02-28, as part of Cybertix's group growth strategy (follows Cybertix's earlier acquisition of Osane Consulting and a Nov 2024 €1M funding round led by Easo Ventures). No percentage stake disclosed.
Infonif (Economía 3 business registry): ZEROLYNX SL company fileChecked on September 3, 2026. Legal entity ZEROLYNX SL, NIF B88028931, incorporated 2018-02-09, registered address Avda De La Libertad 2 1ª - Oficina 2, 28924 Alcorcón, Madrid. Status active.
Zerolynx: LinkedIn company pageChecked on September 3, 2026. Employee count band 51-200, headquarters Alcorcón, Community of Madrid, Spain, founded 2018, industry Computer and Network Security. A separate LinkedIn post from the Cybertix-ownership period is titled "Zerolynx (by Cybertix)", consistent with the Feb 2025-May 2026 group affiliation reported in s4/s2/s3.
Zerolynx: Crunchbase company profileChecked on September 3, 2026. Lists founded 2018, HQ Alcorcón, Spain, and states 36 employees as of June 2026: conflicts with LinkedIn's 51-200 band. LinkedIn used for teamSize per source priority; discrepancy noted here.
Zerolynx: homepage (services, client logo strip)Checked on September 3, 2026. Services: Offensive Security, Cyber Defense, Application Security (SSDLC), GRC, AI Applied to Cybersecurity. "Confían en nosotros" section names BBVA, UNIR, Bankinter, Cetelem and Gobierno as client logos with no accompanying case-study text: a logo strip only, not treated as sufficient confirmation for industries or namedClients per collection rules.
GitHub: Zerolynx S.L. organizationChecked on September 3, 2026. Verified organization for zerolynx.com / www.zerolynx.com, description "Zerolynx es una compañía especializada en ciberseguridad y ciberinteligencia".

Every field on this profile records which of these sources it came from. The profile was last rebuilt from them on September 3, 2026. A field no source confirms is left empty rather than estimated.

Published by QA Rating

Every fact about a company comes from a listed source. A field without a source stays empty. A certificate counts as confirmed only when a registry, certificate or auditor report backs it; a certificate the company only claims about itself is published separately, under that label. Vendors can request a correction at hello@qa-rating.com. A correction is applied when it comes with a public source. Last checked on September 3, 2026.

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Zerolynx

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