We open the doorfor every user.We guard it fromevery threat.
A5 Cyber Nexus is an accessibility auditor and cybersecurity firm based in Thanjavur, Tamil Nadu, serving clients across India. We unite offensive security and digital accessibility - WCAG, RBI and SEBI audits included - across 50+ services and 25+ compliance frameworks, under one wing.
Trusted by leading organizations
Every user deserves
a seat at the table.
Digital accessibility isn't optional - it's the law, it's the right thing, and it's our primary expertise. We audit, remediate, and certify your products to WCAG 2.2, RBI, SEBI, GIGW, RPwD, and global standards.
Then we lock the gate
against every threat.
Adversary-grade penetration testing, red team operations, API security, and cloud review. We think like the attacker - manual, methodical, relentless - so you can lock the gate for good.
The method
Four steps.
One trusted partner.
From accessibility audit to penetration test to compliance sign-off - a connected practice built for regulated, high-stakes teams.
Map
We scope your surface, standards and risk - a plan built for you, not boilerplate.
Probe
Manual + automated testing by senior specialists, never just scanners.
Repair
Prioritized, developer-ready fixes - we can implement them with you.
Prove
Re-test, conformance sign-off, and continuous monitoring options.
The team
Senior specialists,
never just scanners.
Every engagement is staffed by senior accessibility engineers and offensive security specialists. The whole flock has your back.
Accessibility Specialist
WCAG, RBI & SEBI audits
Offensive Pen-tester
VAPT, API & cloud security
Compliance Auditor
ISO, SOC 2, PCI DSS
Defence Analyst
MDR, SOC & incident response
The practice
One partner, the
whole perimeter.
From regulator-mandated accessibility audits to penetration testing, managed defense and secure build - covered end to end by senior specialists.
Accessibility: Audits & Testing
Accessibility Audit (WCAG 2.2)
Full WCAG 2.2 AA conformance audit across web, mobile and PDF - with prioritized, developer-ready findings.
Offensive Security & VAPT
VAPT - Web & Network
Deep manual VAPT for web apps and networks, mapped to OWASP, with proof-of-concept exploits.
Defensive & Managed SOC
MDR & Managed SOC
24/7 managed detection & response and SOC-as-a-service with alert triage, hunting and response.
Cyber Governance & Audit
SEBI CSCRF Compliance
End-to-end SEBI CSCRF readiness: VAPT, cyber audit, red team, M-SOC, NIST CSF 2.0 controls and reporting.
Offensive Security & VAPT
AI / LLM Security Testing
Testing of LLM apps and agents for prompt injection, data leakage and model abuse (OWASP LLM Top 10).
Accessibility: Audits & Testing
IS 17802 & RPwD Act Audit
Conformance audit to IS 17802 and the RPwD Act, 2016 - India's legally mandated accessibility standard.
Compliance coverage
The standards regulators
actually check.
Every engagement maps to the frameworks that matter for your industry and geography - Indian regulators and global standards alike.
Sectors
Built for high-stakes work.
Make it accessible.
Make it attack-ready.
Prove both before launch.
Bring us your app, audit deadline, or security concern. We'll map the fastest path to WCAG conformance, VAPT coverage, and regulator-ready evidence.
