Anti-bot protection · v4.2

Bot defense that
can't be bypassed.

Instant-Block screens every request at the edge in under 200 ms. Headless browsers, residential proxies, LLM solvers — they all stop here, and your origin never knows they knocked.

Start protecting How it works
99.998% accuracy · 0 bypasses recorded
Bots blocked today — live · updates every second
Requests screened — across 1,742 active customers
Median verdict latency 187ms p95 under 240 ms
> _Features

Everything you need
to stop automated traffic.

Six layers of detection. One simple integration. Drops into any stack via reverse proxy, SDK, or DNS.

TLS & JA4 fingerprinting

Every connection is matched against an atlas of 3.1 billion known client signatures. Spoofed user-agents are caught at the handshake.

Behavioural analysis

Canvas entropy, audio context drift, scroll harmonics and pointer dynamics — machines fail at least one. We measure them all.

Sub-200 ms verdicts

The whole pipeline runs at the edge in 50+ POPs worldwide. Decisions land before your origin even hears the request.

Silent refusal

Bots receive a response indistinguishable from success. They don't retry, don't escalate, don't switch tools. They simply stop.

LLM solver detection

Captcha-solving language models leave statistical traces in their request timing and order. We detect them at 99.7% recall.

Five-minute install

Drop in a reverse proxy, add one line to your DNS, or call our SDK from your backend. No code changes to your app required.

> _How it works

Three stages.
Every single request.

Bypassing one stage is conceivable. Bypassing all three has never been observed in the wild, in the lab, or by our internal red team.

01

Detect

We inspect the TLS handshake, derive a JA4+ fingerprint, and compare against a live atlas of known clients. Most bots fail here before a single byte of HTTP is exchanged.

~ 12 ms
02

Analyse

Suspicious sessions are asked to perform micro-tasks that humans pass without noticing — canvas paints, pointer harmonics, scroll inertia. Machines leave statistical traces.

~ 160 ms
03

Block

Verdicts are rendered in under 200 ms. Humans proceed unchanged. Bots get a soft-fail response that looks like success — so they stop without escalating.

~ 14 ms
> _Detection catalogue

What we stop.

A non-exhaustive list of agents Instant-Block resolves at the perimeter every day.

Agent type Method Detection rate
Headless Chromium Patched navigator.webdriver, stealth plugins, custom CDP 100%
Residential proxies Rotating IPs disguised as iOS / Android Safari 99.9%
Puppeteer / Playwright Hand-tuned with mouse jitter and warm cookie jars 100%
LLM CAPTCHA solvers GPT-class models with vision and reasoning loops 99.7%
Device farms 47+ hardware devices with identical sensor curves 99.6%
Custom HTTP clients cURL, Go, Python posing as browsers 100%
> _Pricing

Simple, predictable.

Pick a plan that matches your traffic. Upgrade or cancel any time — no annual contracts required.

Starter

For small sites

$29/mo

  • Up to 1M requests / month
  • TLS fingerprinting
  • Behavioural analysis
  • Email support
  • Standard dashboard
Start free trial
Most popular
Pro

For growing teams

$149/mo

  • Up to 50M requests / month
  • Everything in Starter
  • LLM solver detection
  • Custom detection rules
  • Priority support < 4h
  • Full event log & export
Start free trial
Enterprise

For high-traffic

Custom

  • Unlimited requests
  • Everything in Pro
  • On-prem & air-gap deploy
  • Dedicated solutions engineer
  • 99.999% SLA, 24/7
  • Custom detection models
Contact sales
> _Get started

Stop the bots
in under 5 minutes.

Sign up, drop in the integration, watch your dashboards go quiet. No credit card required to start.

Start free trial Talk to sales