We open the doorfor every user.We guard it fromevery threat.
A5 Cyber Nexus unites offensive security and digital accessibility, ensuring your web assets are resilient against threats and inclusive for all - 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.
Our specialization
We hunt the flaws
your AI didn't know it had.
AI/LLM security is our core offensive focus - prompt injection, jailbreaks, agentic tool abuse and model supply-chain risk. That expertise sits inside a full-spectrum practice: VAPT, red team operations, API and cloud security. We think like the attacker - manual, methodical, relentless.
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
AI Security Specialist
Prompt injection, adversarial ML & AI audits
Offensive Pen-tester
VAPT, red team, API & cloud
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
Our specializationAI / LLM Security Testing
Our specialization: prompt injection, jailbreaks, agentic AI abuse and LLM supply-chain testing (OWASP LLM Top 10 / MITRE ATLAS).
Offensive Security & VAPT
VAPT - Web & Network
Deep manual VAPT for web apps and networks, mapped to OWASP, with proof-of-concept exploits.
Managed Security Services (MSS)
MSSAI Activity & Data Leak Monitoring
Managed monitoring of AI tool usage - Claude, ChatGPT, Gemini, Copilot and more - for data leakage, shadow AI and training-data exposure, integrated with your SIEM and DLP.
Cyber Governance & Audit
AI governanceISO/IEC 42001 (AI Management System) Audit
ISO 42001 AIMS gap analysis, build-out and certification-audit readiness, run by our ISO 42001-qualified auditors.
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.
FAQ
Frequently asked
What does A5 Cyber Nexus do?
A5 Cyber Nexus is a cybersecurity and digital accessibility company based in Thanjavur, Tamil Nadu, India. We deliver WCAG 2.2 accessibility audits and VPAT/ACR reports, penetration testing (VAPT) and red teaming, AI/LLM security testing, managed security services, and compliance audits - including SEBI CSCRF, RBI, CERT-In, ISO 27001, ISO/IEC 42001 and the DPDP Act.
Do you work with clients outside India?
Yes. Engagements are delivered remotely to clients across the US, UK, EU, Canada, Australia, Singapore and the UAE, alongside India-specific work for SEBI-, RBI- and CERT-In-regulated organizations.
Is AI security your main specialization?
AI/LLM security testing - prompt injection, jailbreaks, agentic AI abuse and adversarial ML - is our lead offensive-security specialization, delivered alongside full-spectrum VAPT, red teaming, API, cloud and mobile security, plus ISO/IEC 42001 AI governance audits.
What's the difference between an accessibility audit and a penetration test?
An accessibility audit tests whether your product is usable by people with disabilities, measured against WCAG 2.2 and regulations like the RPwD Act and IS 17802. A penetration test (VAPT) tests whether an attacker can break in. We run both from one practice, since regulated organizations increasingly need both audited together.
How do I request a quote?
Use the contact form to request a scoping call. Most requests get a clear scope, timeline and fixed quote back within one business day.
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.
