One weak link between IT and OT can stop production

In a factory or a power plant, one wrong scan can trip a safety system or halt production. We test your operational technology the safe way: non-invasively, coordinated with your schedule, so you find the risks without becoming one.
Talk to a Security Expert
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Wireframe-style 3D illustration of a power plant complex featuring two large hyperboloid cooling towers, multiple rectangular buildings with rooftop vents, several tall chimneys, cylindrical tanks, and connected pipelines on a rectangular base.
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The question that matters

If an attacker got into your corporate network today, how far could they travel before they reached the systems that run your physical operations?
WHY MOST OT TESTINGs FALL SHORT

IT security tools can break the machines that run your plant

Most vendors point enterprise IT tools at OT and hope for the best. In an industrial network, an aggressive scan can freeze a PLC or trip a safety system.

We test the way OT demands: safety first, non-invasive, and coordinated with your operations.
Most OT Vendors
 Points enterprise IT tools at your OT
 Compliance checklist, box ticked
 Little grasp of operational limits
Invasive testing that risks a shutdown
Checks the network perimeter, stops there
 Shares just a report
Payatu
AI-native and research-led, with OT-specific tools and protocol expertise
Risk-based assessment aligned to how your plant runs
Deep understanding of production and safety constraints
Safety-first, non-invasive methodology
The complete OT stack: network, devices, and applications
 Practical, phased fixes and ongoing OT program support
What we test

The whole OT stack.

We scope to your operations, then test every layer, safely, from the network to the field devices.
SCADA & HMI
PLCs & controllers
Industrial protocols
Engineering workstations
IT/OT boundary
Remote & vendor access
Field devices
 Safety systems
SCADA & HMI
PLCs & controllers
Industrial protocols (Modbus, DNP3)
Engineering workstations
IT/OT boundary
Remote & vendor access
Field devices
 Safety systems

Network & access

IT/OT boundary & segmentation
Remote & vendor access
Firewall rules between zones
Asset discovery, including shadow OT
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Network & access

SCADA & software

SCADA & HMI applications
Engineering workstations
Industrial protocols (Modbus, DNP3, OPC)
Authentication & access control
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SCADA & software

Infrastructure

PLC & RTU configurations
Field device vulnerabilities
Firmware & default credentials
Safety-system dependencies
Infrastructure
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Network & access
IT/OT boundary & segmentation
Remote & vendor access
Firewall rules between zones
Data protection in transit & at rest
Asset discovery, including shadow OT
Dark background with a bright orange and yellow glowing light streak on the right side, fading into blackness.
SCADA & software
SCADA & HMI applications
Engineering workstations
Industrial protocols (Modbus, DNP3, OPC)
Authentication & access control
Infrastructure
PLC & RTU configurations
Field device vulnerabilities
Firmware & default credentials
Safety-system dependencies
Process

How it works

Simple, step by step, and safe for production from start to finish.

Understand your plant

You walk us through your operations and what must never go down. We plan around it.
01

Map safely

We quietly discover your OT assets and how they connect, without touching production.
02

Follow the path

We show how an attacker could cross from IT into OT and reach your controllers.
04

Test, safety first

We assess the network, software, and devices using OT-safe methods, coordinated with your team.
03

Explain what we found

Every issue in plain language, ranked by safety and production impact.
05

Fix, in phases

Practical fixes that fit your maintenance windows, with compensating controls for what you can't patch.
06
Process

How it works

Simple, step by step, and safe for production from start to finish.

Understand your plant

You walk us through your operations and what must never go down. We plan around it.
01

Map safely

We quietly discover your OT assets and how they connect, without touching production.
02

Test, safety first

We assess the network, software, and devices using OT-safe methods, coordinated with your team.
03

Follow the path

We show how an attacker could cross from IT into OT and reach your controllers.
04

Explain what we found

Every issue in plain language, ranked by safety and production impact.
05

Fix, in phases

Practical fixes that fit your maintenance windows, with compensating controls for what you can't patch.
06
PROCESS
How it works
Simple, step by step, and safe for production from start to finish.

Understand your plant

You walk us through your operations and what must never go down. We plan around it.
01

Attack Surface Analysis

Attack scenarios mapped to your business risks.
02

Test, safety first

We assess the network, software, and devices using OT-safe methods, coordinated with your team.
03

Follow the path

We show how an attacker could cross from IT into OT and reach your controllers.
04

Explain what we found

Every issue in plain language, ranked by safety and production impact.
05

Fix, in phases

Practical fixes that fit your maintenance windows, with compensating controls for what you can't patch.
06
Testimonials

What OT teams say about working with us

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Carthic Kameshwaran

Head of Delivery - neoEYED

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Arockiaraj Martin

CISO- Enkash

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Payatu's focus on in-depth defence, quality, and proactive approach to all their services were precisely what our fast-growing publicly listed company needed.
Payatu's Services have helped us in ensuring that not only do we exceed strict compliance standards, but also ensure that security is not just a tick box exercise in our organisation. We have been able to make security an integral part of...

Simran Gambhir

Chief Information Officer - Butn, Sydney

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Payatu delivered a 360-degree penetration testing exercise across our web applications and internal network. Their structured, methodical approach and deep technical understanding were evident throughout the engagement. They didn’t just give us a list of vulnerabilities, they provided actionable insights that helped to improve our security posture. The engagement was constructive.

Sushil Vanve

Director of Engineering - CheckRed

WHY PAYATU

Why OT teams pick us.

In OT, the testing method matters as much as the findings. We bring OT-specific expertise that keeps your plant running while we find the risks.
GICSP, GRID & ISA/IEC 62443 certified
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ISO 17025 accredited · CERT-Inempanelled
Founders of Nullcon & hardwear.io
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CVEs disclosed to Siemens, Schneider & Rockwell
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Hands-on across power, oil & gas, water & manufacturing
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Aligned to ISA/IEC 62443, NIST800-82 & NERC CIP
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White text on black background reading 'Safer, stronger critical infrastructure'.
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What you get

The whole story, and a plan your plant can act on.

Complete explaination

Exactly what we found and how, across your OT network, software, and devices, in plain words.

Ranked by safety and uptime

Findings prioritised by risk to plant safety and production, not just a severity score.
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The proof

Evidence for every finding, gathered with OT-safe methods. Nothing that risks production.

Phased, practical fixes

Remediation that fits your maintenance windows, with compensating controls for what you can't patch, and a retest.
FAQ

Questions Web Application teams ask us

What is Web Security Testing?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
What vulnerabilities are tested during a Web Security Assessment?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
How is Web Security Testing different from a vulnerability scan?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
When should we perform Web Security Testing?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
What do we receive after the Web Security Assessment?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
Can Web Security Testing identify business logic vulnerabilities?
Web Security Testing identifies vulnerabilities in web applications that attackers could exploit, helping organizations protect sensitive data and prevent security breaches.
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Want to get your critical infrastructure assessed?

Talk to a security researcher and discuss the security posture of your company

Talk to a Security Expert
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