How It Works Features Monitor Types Pricing
amazon.com/pricing — Price drop $40 detected competitor.com/features — New "Enterprise" nav item added stripe.com/docs — 3 endpoint changes detected github.com/vercel/next.js — v14.2.0 release published cloudflare.com/status — Degraded performance alert npmjs.com/react — Weekly downloads +12% openai.com/pricing — New "Team" tier added aws.amazon.com/ec2 — Spot price change us-east-1 amazon.com/pricing — Price drop $40 detected competitor.com/features — New "Enterprise" nav item added stripe.com/docs — 3 endpoint changes detected github.com/vercel/next.js — v14.2.0 release published cloudflare.com/status — Degraded performance alert npmjs.com/react — Weekly downloads +12% openai.com/pricing — New "Team" tier added aws.amazon.com/ec2 — Spot price change us-east-1
Early Warning Intelligence
The canary for your competitive world.

Know Before They Tell You.

Canary watches any URL — prices, competitors, APIs, docs, job boards — and alerts you the instant something changes. No scripts. No scraping. Just answers.

No credit card · 3 monitors free · Setup in 60s
Live Events Monitoring Now
47K+
URLs
Monitored
2.3M
Changes
Detected
4.2s
Avg Alert
Latency
99.97%
Platform
Uptime
3,800+
Teams
Using Canary
How It Works

Four steps.
Zero friction.

From URL to alert in under a minute. No code, no SDKs, no dashboards you have to learn.

01
Add
Paste Any URL
Drop in any URL — a competitor's pricing page, an API endpoint, a product listing, a job board. If it's on the web, Canary can watch it.
02
Configure
Set Your Rules
Choose check frequency, what to watch (full page, a CSS selector, JSON path, price field), and how sensitive the trigger should be.
03
Connect
Route Your Alerts
Send alerts to Slack, email, webhook, PagerDuty, Discord, or SMS. Build workflows in Zapier or n8n with one click.
04
React
Act on Changes
Get a rich diff with exactly what changed — highlighted text, old vs. new values, DOM diffs, JSON diffs — not just "something changed."
Capabilities

Built for teams
who need to know first.

Intelligent Diff Engine+
Not just "page changed" — Canary shows you exactly what changed. Highlighted text diffs, JSON property changes, price old/new, DOM node insertions and deletions. Context that actually matters.
Check Intervals — Down to 30 Seconds+
Check any URL as frequently as every 30 seconds on Enterprise, 1 minute on Business, 5 minutes on Growth. Our distributed crawler network ensures checks run on time, every time — even for JavaScript-heavy SPAs rendered via headless Chrome.
AI Change Summaries+
Raw diffs are noisy. Canary uses Claude AI to summarize exactly what changed and why it matters — "Competitor added 'Enterprise SSO' to their pricing table" instead of 400 lines of HTML diff.
Full JavaScript Rendering+
A Playwright-powered browser fleet renders dynamic SPAs, React apps, and lazy-loaded content before diffing. No more missing changes hidden behind JavaScript.
Team Workspaces+
Shared monitors, role-based access, team notification routing, and audit logs. Marketing, engineering, and product can each see what matters to them — without the noise.
Diff Engine Preview
openai.com/pricing — Change detected
− <div class="plan">Pro — $20/mo</div>
+ <div class="plan">Pro — $20/mo</div>
+ <div class="plan new">Team — $30/mo</div>
AI Summary
OpenAI added a new "Team" pricing tier at $30/mo between Pro and Enterprise. This appears to be a new mid-market tier targeting small teams.
Check cadence — last 7 checks
14:32:01
238ms
14:31:01
201ms
14:30:01
412ms
14:29:01
244ms
14:28:01
312ms
99.97%
Uptime
281ms
Avg Check
competitor.com/features
Competitor added "SOC 2 Type II" badge to their enterprise features section. This is new — they appear to have recently completed their audit.
stripe.com/docs/api
Two new methods added to the Billing API: subscription_items.create_usage and invoices.finalize_invoice. Breaking change note removed from checkout section.
Render pipeline
🌐
HTTP Request
Fetch raw HTML + headers
✓ 201ms
🎭
Playwright Render
Execute JS, await hydration
✓ 1.4s
🔍
Diff Engine
DOM snapshot comparison
✓ 38ms
📣
Alert Fired
Slack + Email + Webhook
✓ 0.3s
JD
James Doe
Admin · All monitors
Admin
MC
Maria Chen
Editor · Marketing monitors
Editor
AR
Alex Rivera
Viewer · Pricing monitors
Viewer
Monitor Types

Watch anything.
On the web.

Five specialised monitor types cover every use case — from price intelligence to API contract monitoring.

💰
Price Tracking
Track competitor prices, Amazon listings, SaaS tiers. Get alerted the moment a price changes anywhere on the web.
Popular
📄
Content Change
Watch blog posts, landing pages, changelog entries, job boards, or any text content for meaningful updates.
🔷
DOM Monitor
Watch specific elements using CSS selectors — nav items, feature lists, CTAs, banners — for structural changes.
⚡
API / JSON
Monitor JSON endpoints for field additions, value changes, or schema drift. Ideal for status pages and public APIs.
New
🟢
Uptime Check
Simple HTTP health checks with response time tracking, status code monitoring, and instant down alerts.
Pricing

Simple pricing.
No surprises.

Start free. Scale when you need to. Cancel anytime. All plans include unlimited alert history.

Starter
Free
Forever free
Perfect for individuals exploring competitive intelligence.
3 monitored URLs
1 hour intervals
Email alerts only
7-day change history
Basic diff view
Growth
$49
/ month · billed monthly
For solo professionals and small teams who compete on information.
75 monitored URLs
5 min intervals
All alert channels
90-day history
JS rendering
5 team seats
Most Popular
Business
$199
/ month · billed monthly
For growing teams who compete on intelligence.
500 monitored URLs
1 min intervals
AI change summaries
2-year history
Unlimited seats
Priority support
Enterprise
Custom
Contact for pricing
For large teams with specific compliance, security, or volume needs.
Unlimited URLs
30 sec intervals
Private cloud deploy
Custom SLA
SSO / SAML
Dedicated CSM
What Teams Say

Intelligence that
moves business.

"We caught a competitor's pricing change before our sales team even had their morning standup. Canary paid for itself in the first week."

SR
Sarah R.
Head of Competitive Intel · Series B SaaS

"We use Canary to monitor 200+ API endpoints across our vendor ecosystem. The JSON diff alerts alone replaced a full-time engineering task."

MK
Marcus K.
Platform Engineering Lead · Fintech

"The AI summaries are genuinely good. Instead of reading diffs, I get a one-line explanation. My whole team switched from 3 other tools to just Canary."

JL
Jamie L.
Product Director · E-commerce Platform

Start watching
the web now.

Join 3,800+ teams using Canary to stay ahead. Free forever on 3 monitors. No credit card needed.

Free plan · No credit card · Setup in 60 seconds