Bot traffic detection

Detect bots, not just invalid clicks

Bots are sophisticated. Basic automation detection catches obvious scripts. ClickGuardian detects headless browsers, residential proxy bots, and AI-powered agents that mimic human behaviour. Block the fraud Google misses.

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Headless browsers and AI agents Residential proxy bots Real-time blocking
Is this you?

Sound familiar?

What it is

What is a bot traffic blocker?

In plain English

A tool that spots automated visitors in your ad traffic and stops them clicking your ads.

A bot traffic blocker is a tool that identifies automated visitors in your ad traffic and filters them out of your campaigns, so your budget is spent on real people rather than scripts. ClickGuardian classifies every click as human or bot in real time, and when it confirms bot traffic on your Google Ads it adds the offending source to your exclusion lists automatically, blocking that bot from clicking your ads again.

Detection combines device fingerprinting with behavioural analysis. Fingerprinting inspects over 100 technical signals per visit, from hardware and browser characteristics to canvas rendering, to expose headless browsers, automation frameworks, and emulated environments. Behavioural analysis then watches how each visitor actually behaves: mouse movement, typing rhythm, scroll patterns, and click timing all separate a real person from a bot built to look like one.

You do not have to take any of this on faith. Every ClickGuardian plan includes a free 7-day trial, so you can connect your account, watch it block bot traffic on your own campaigns, and judge the results before paying anything.

Threat landscape

Bot types targeting your ads

In plain English

From simple scripts to programs that act like people.

Bot sophistication is increasing rapidly. Here are the six categories of bot traffic we detect and block, from basic scripts to AI-powered agents.
01 / 06
Low

Basic Bots

In plain English A simple script clicking from one address.

Simple scripts running from a single IP with the same user agent. Easy to catch with basic detection, but still responsible for a large volume of invalid clicks.

Device fingerprinting

We know your device better than you do

In plain English

Every device leaves clues. A bot’s clues don’t add up.

ClickGuardian collects over 100 device signals per visit, building a fingerprint that reveals whether a visitor is a real person or a bot.
01

Hardware Signals

  • Device ID & type
  • CPU architecture & cores
  • GPU type & renderer
  • Memory profile
02

Browser Signals

  • User agent & version
  • Installed plugins
  • Rendering engine
  • Permissions & features
03

Canvas & Rendering

  • Canvas fingerprinting
  • WebGL fingerprinting
  • Audio context fingerprinting
  • Font enumeration
04

Display & Environment

  • Screen resolution & depth
  • Time zone & locale
  • OS & platform specifics
  • Touch support & input

What fingerprinting reveals

  • Real device vs headless environment
  • Datacenter vs consumer hardware
  • Emulated or spoofed environments
  • Device consistency across sessions
Behavioural analysis

Can bots really fake human behaviour?

In plain English

People are a bit clumsy. Bots are suspiciously perfect.

Humans are messy. Bots are perfect. That difference is our advantage. We analyse five categories of behaviour to separate real users from automated traffic.

1

Mouse Movement

Real Human

Natural curves, acceleration and deceleration, micro-corrections, hesitation, imprecise targeting of elements

Bot

Linear movement, constant speed, pixel-perfect targeting, no jitter, mathematically straight paths between elements

2

Keyboard & Typing

Real Human

Variable keystroke speed, typos and corrections, pauses to think, natural rhythm differences between words

Bot

Constant speed input, zero typos, clipboard paste patterns, uniform intervals between keystrokes

3

Form Interaction

Real Human

Re-reads fields, scrolls back up, tabs between fields naturally, changes answers, takes time reviewing

Bot

Single-action fill, sequential field completion, no re-reading, instant form submission without review

4

Scroll & Page Interaction

Real Human

Variable scroll speed, pauses at content, scrolls back up, engages with visible elements, natural reading patterns

Bot

Instant scroll to target, no reading pauses, uniform scroll velocity, skips directly to interactive elements

5

Click Velocity

Real Human

Variable speed between clicks, occasional double-clicks by accident, hover before clicking, imprecise click targeting

Bot

Consistent precision, uniform time intervals, no hover events, direct navigation to click targets without exploration

Humans are messy. Bots are perfect.

That difference is our advantage. ClickGuardian's behavioural analysis turns imperfection into a powerful signal for detecting automated traffic.

Framework detection

We know your automation tools

In plain English

The software used to fake clicks leaves fingerprints, and we know them.

Professional automation frameworks leave fingerprints. We detect every major tool used for click fraud, even when they try to hide.

Frameworks we detect

Watching
Selenium WebDriver property detection
Puppeteer Browserless signatures
Playwright Headless mode indicators
Cypress Identifiable runtime signatures
Headless Chrome / Firefox Browser-level headless detection
WebDriver Protocol / Custom Scripts Protocol-level detection

How we detect them

WebDriver Detection

Checks for the navigator.webdriver property and related DOM artefacts that automation frameworks inject.

Headless Mode Indicators

Identifies missing browser features, non-standard window dimensions, and absent plugins that indicate headless execution.

Framework Fingerprints

Each framework leaves unique traces in the DOM, JavaScript globals, and browser behaviour that we pattern-match against.

Chrome DevTools Protocol

Detects active CDP connections that automation tools use to control the browser programmatically.

Plugin Absence & Timing Analysis

Automated browsers lack standard plugins and exhibit inhuman response timing. We measure both to confirm automation.

AI bot detection

Even AI bots can't hide

In plain English

Even programs that write and click like people slip up in ways we can measure.

Most click fraud tools have zero AI bot detection. We're detecting threats that are just beginning to emerge, giving you protection before the rest of the industry catches up.

What AI bots try to do

  • Simulate natural typing patterns with variable speed and occasional mistakes
  • Generate human-like mouse movements with curves and micro-corrections
  • Complete forms with contextually appropriate information
  • Make browsing decisions that mimic genuine user intent

How we detect them

  • Linguistic pattern analysis — Detects LLM-generated micro-signatures in typing rhythms
  • Intent consistency — Analyses whether browsing behaviour matches stated intent
  • Response timing — AI bots show characteristic delay patterns between action and response
  • Form completion logic — Detects unnaturally consistent accuracy across complex form fields
  • Behavioural consistency anomalies — AI behaviour is too consistent across sessions
  • Session intelligence — Cross-references behaviour across our network of 2,000+ customers
Frontier

Frontier AI Bot Detection

Most click fraud tools have zero AI bot detection. ClickGuardian is detecting threats that are just beginning to emerge, powered by our Verideon AI engine.

Real-time blocking

Stop bots before they cost you

In plain English

We spot the bot on its first click and stop it coming back.

Detection is only valuable if it happens fast. ClickGuardian analyses every click in milliseconds and blocks fraudulent sources from clicking again.

01

Bot Clicks Ad

A bot clicks your Google or Microsoft ad, triggering our detection system.

02

Instant Analysis

100+ signals analysed in milliseconds: fingerprint, behaviour, network, and session data.

03

Bot Blocked

Confirmed bot is blocked at the network edge. Never reaches your website or analytics.

04

Network Learns

Bot signature shared across our network. All 2,000+ customers are now protected from this threat.

<50ms
Average detection time from click to block
2,000+
Businesses contributing to network intelligence
24/7
Continuous protection, no downtime
False positive prevention

We catch bots, not real users

In plain English

Real customers get through, even on a VPN or an unusual device.

Aggressive bot detection means nothing if it blocks legitimate customers. ClickGuardian uses conservative scoring and multi-signal confirmation to ensure real users always get through.

Conservative Scoring

We only block when confidence is high. A single suspicious signal is never enough. Multiple independent signals must confirm bot behaviour before any action is taken.

Multi-Signal Confirmation

Fingerprint, behaviour, network, and session signals must all agree before a visitor is classified as a bot. This layered approach prevents false positives from any single data point.

Behavioural Flexibility

Unusual humans exist. Users with disabilities, elderly users, or people on unfamiliar devices behave differently. Our system accounts for the full range of legitimate human variation.

VPN & Corporate Networks Welcome

VPN users and corporate networks aren't blocked just for using one. We separate "unusual human" from "bot" by behaviour, not just network origin.

Real customers aren't blocked for one unusual signal, such as a VPN or an unfamiliar device. Combined with our Google Ads protection, you get comprehensive coverage without sacrificing legitimate traffic.

FAQ

Frequently asked questions

What types of bots do you detect?
We detect basic bots, sophisticated bots, headless browsers (Chrome, Firefox, Chromium), residential proxy bots, automation frameworks (Selenium, Puppeteer, Playwright), and AI-powered bots. Essentially, any non-human traffic attempting to click your ads.

Can bots really bypass basic protection?
Absolutely. Basic systems catch simple scripts, but miss headless browsers and residential proxy bots. Sophisticated fraudsters use automation frameworks and now AI agents. Basic detection is outdated; advanced behavioural analysis is necessary.

How do you detect AI-powered bots?
We analyse typing patterns for LLM micro-signatures, monitor response timing anomalies, detect behavioural consistency issues, and use cross-session intelligence. AI bots are our frontier detection capability; most systems have zero AI bot detection yet.

What's a headless browser, and why is it a problem?
A headless browser is Chromium or Firefox running without a visual display — used for automation. It can run JavaScript, interact with pages, and appears more human-like than basic bots. It's a problem because it bypasses simple detection and mimics human behaviour.

Will bot detection block legitimate traffic from VPNs or corporate networks?
No. We distinguish between "unusual human" (VPN user, corporate network, non-standard device) and "bot." A real customer from an unusual location or device isn't blocked for that one unusual signal.

How quickly does bot blocking happen?
Within seconds. We need to see the click first and run our detection rules before executing a block. Once a visitor is scored as a bot, blocking happens almost instantly on subsequent interactions.
● Trusted by 2,000+ businessesProcessing over 11.5 million traffic events a month

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