Why PaperPin?
The web changes.
Most tools miss it.
Most monitoring tools tell you whether a page is up. PaperPin tells you what actually changed, what it looked like before, and whether it matters automatically.
No credit card
3 monitors free forever
Visual proof on every change
Competitor Pricing - price changed $29 to $35
SaaS Status Page - incident banner added
Release Notes - new changelog section detected
Job Listings - 3 engineering roles removed
News Homepage - hero article replaced
Vendor Terms - section 4.2 reworded
Product Page - pricing tier removed
Competitor Blog - new post detected
Competitor Pricing - price changed $29 to $35
SaaS Status Page - incident banner added
Release Notes - new changelog section detected
Job Listings - 3 engineering roles removed
News Homepage - hero article replaced
Vendor Terms - section 4.2 reworded
Product Page - pricing tier removed
Competitor Blog - new post detected
The problem
You're flying blind.
The pages you care about change without warning, and by the time you notice, it is already too late.
01
Your competitor just changed their pricing, and you found out from a customer
Pricing pages update silently. By the time a customer mentions it, you have already lost deals. You needed to know the moment it changed, not after the fact.
02
A critical vendor changed their terms of service, buried in section 12
Legal pages, privacy policies, and service agreements change without notification. If it affects your business, you need the exact text that changed, not just that the page loaded.
03
Your uptime monitor says the site is up, but the content is completely wrong
Traditional uptime monitors check HTTP status codes. They do not know if your product page is showing placeholder text, a broken layout, or missing information.
04
Manual checks are unreliable, inconsistent, and do not scale
Bookmarking and manually refreshing pages works until it does not. Important signals get missed because humans cannot watch everything, all the time.
PaperPin vs the rest
Built for what changed,
not just whether it loaded.
Uptime monitors, change tracking browser extensions, and generic alerting tools each solve a slice of the problem. PaperPin solves all of it.
PaperPin
Uptime monitors, extensions and generic tools
Watch a specific page region
Select exactly what matters, not the full noisy page.
Full-page only, or nothing
Nav changes, cookie banners, and ads all trigger false alerts.
Visual before/after proof
See exactly what the page looked like before and after, with highlighted diff regions.
No visual evidence
You get an alert but have to investigate what changed yourself.
AI explains what changed and why it matters
Structured summaries tell you what the change means, not just that pixels shifted.
Raw diffs or raw alerts
You get noise without context or business meaning.
Multi-channel delivery
Email, Slack, Discord, webhooks, and internal logs keep teams in sync.
Single-channel alerts
The signal often lands outside the workflow where your team acts.
Workspace-level insights
Track monitor health, patterns, trends, and high-significance events across the workspace.
Isolated checks
Each page is treated as a separate alert with no larger picture.
Five reasons
Why you should choose
PaperPin.
01
Zone-based monitoring that ignores the noise
Select the exact region of a page you care about. Nav bars, cookie notices, ads, and timestamps never trigger false alerts.
Drag to select
02
Visual proof you can actually see and share
Every meaningful change comes with highlighted before/after screenshots. Red marks what disappeared. Green marks what appeared.
Before / after slider
03
AI that tells you what changed and why it matters
PaperPin interprets changes with structured explanations of what changed, what category it falls into, and what it might mean.
Structured summaries
04
Insights that surface patterns across your workspace
PaperPin aggregates every change event into workspace-level intelligence, high-significance counts, monitor health, and trends.
Workspace intelligence
05
Alerts that go exactly where your team works
Email, Slack, Discord, and webhooks can include visual proof so your team sees changes in the tools they already use.
Multi-channel delivery
paperpin - change_event_detail
// Jun 4, 2026 - 7:03 PM
CHANGE DETECTED - Competitor Pricing
monitor:
"Competitor Pricing Page"
diffScore:
0.55 // significant
summary:
"Pricing increased from $29 to $35."
beforeImageUrl:
"storage/snapshots/before_a3f7.png"
afterImageUrl:
"storage/snapshots/after_a3f7.png"
-> Slack alert sent to #pricing-alerts
-> Webhook payload delivered
What others miss
The details that matter.
Content fidelity, not just HTTP status
A page can return 200 OK while displaying completely wrong content. PaperPin checks the actual rendered content in your selected zone.
Sensitivity controls that cut alert fatigue
Timestamps, ad rotations, and live counters change constantly but rarely matter. Sensitivity thresholds filter minor diffs.
A complete timeline, not just the latest alert
Every change event is stored with its snapshot, summary, and delivery status so you can understand how a page evolved.
Automatic retry and failure recovery
If a delivery fails, PaperPin retries automatically and logs the failure reason. Nothing gets silently dropped.
Pattern detection across your monitors
PaperPin aggregates change events across your workspace to surface categories, high-significance clusters, and trends.
Who it's for
Built for anyone who
needs to know.
PaperPin is for teams and individuals who have pages they care about and cannot afford to miss changes.
Product and growth teams
Track competitor moves in real time. Know about pricing changes, feature launches, and positioning shifts before your customers do.
Monitor competitor pricing pages
Track feature announcements and changelogs
Watch job postings for strategic signals
Monitor SaaS status pages
Operations and compliance
Stay informed when vendor terms, privacy policies, or regulatory pages change with exact before/after evidence for your records.
Monitor vendor terms of service changes
Track privacy policy updates
Watch regulatory and compliance pages
Monitor supplier pricing and availability
Developers and agencies
Integrate change events into your pipelines via webhooks. Monitor client sites for unintended changes after deployments or third-party updates.
Monitor production pages after deploys
Track third-party embeds and widgets
Webhook into CI/CD or alerting pipelines
Client site health monitoring
Signal, not noise
Numbers that
speak for themselves.
3min
Fastest check interval on Scale, for near real-time awareness
3
Detection modes: Visual, Text, and AI enrichment
5
Delivery channels: Email, Slack, Discord, Webhook, Log
1cr
Per monitor run, transparent and predictable credit pricing
Our principles
How we think
about monitoring.
01
Signal over noise
An alert that fires too often is as useless as an alert that never fires. Sensitivity controls, watch zones, and intelligent filtering exist so PaperPin alerts you only when something matters.
02
Evidence, not just events
Every change comes with proof. Before/after screenshots, highlighted regions, summaries, and delivery receipts make the event actionable.
03
Monitoring is infrastructure
PaperPin should be invisible when things are normal and unmissable when something matters. It is a system that tells you what you need to know.
04
The web is a data source
Public pages contain pricing intelligence, competitive signals, regulatory updates, and product information. PaperPin treats the web as an event-driven data source.
Stop refreshing.
Start knowing.
Set up your first monitor in under two minutes.
No credit card - 3 monitors free forever - Cancel anytime