Your site is up.
Is it working?

One confusion score per page, updated in real time. Alerts when users struggle. No session replay.

No credit card. Takes 2 minutes to set up.
flusterduck
Overall Confusion
All pages nominal
/checkout12 ↓
/pricing34 ↑
/onboarding8 →
/settings22 →
OVERALL SCORE
0
within baseline
last 15 min
<4KB
SDK gzipped
18
signal types
0
pixels recorded
MIT
SDK license
No DOM recording. No PII. GDPR-ready by design.

Interaction to insight in milliseconds

User interacts
Clicks, scrolls, navigates.
SDK captures signals
Behavioral only. No recording. Under 4KB.
Signals classified
18 types auto-detected. Rage click? Dead click?
Score updates
Per-page, 0–100, baseline-aware.
Spike triggers alert
Slack with the page, element, and user count.
flusterduckFLUSTERDUCK ALERT
/checkout confusion score hit 78

Top signal: rage clicks on
button#apply-coupon

Affected: 31 users, last 15 min
Baseline: 24 — 3.2× above normal

→ button disabled (opacity: 0.5)
  no visible feedback

What nobody else does

Other tools bury frustration detection in session recordings. We made it the whole product.

ClarityHotjarFullStoryLogRocketflusterduck
Real-time score per page————✓
Slack alerts on UX spikes————✓
Element diagnosis————✓
Deploy correlation————✓
MCP server————✓
No session replay————✓
A11y signals————✓
Why the difference matters
Score-first
Other tools start with recordings. We start with a number. When it moves, you investigate.
No replay is a feature
No DOM recording. No PII. No GDPR headaches. Lighter SDK, better privacy.
Baseline-aware
A 45 on docs is normal. A 45 on checkout is a fire. We know the difference.
Deploy correlation
Connect GitHub/Vercel. "Confusion rose 340% after deploy #847." No one else does this.

18 signals, auto-detected

Desktop, touch, keyboard. All ship on day one. No event mapping required.

Rage Clicks w:253+ clicks, same element, 2 seconds. Tracks velocity.
Dead Clicks w:12Click on something non-interactive. Measures distance to nearest target.
Speed Frustration w:14Click, wait 3s, nothing. Click again.
Thrash Cursor w:15Mouse at 800+ px/s, 3+ reversals.
Loop Navigation w:20A → B → A in 30 seconds.
Scroll Bounce w:8Past 50%, back to top, past 50% again.
Form Hesitation w:12Focus a field, stare 5+ seconds.
Form Abandonment w:18Fill fields, leave without submitting.
Error Encounter w:15JS error or failed request during use.
flusterduck
calm
0–20

One glance. You know.

Subtle visual shifts you learn to read from across the room.

Ask your AI about your UX

you: What's your overall score?
flusterduck:Overall confusion is 18. All pages normal. /pricing slightly elevated at 34, baseline 22.

Transparent pricing

Free to start. No surprise bills. No credit card required.

MonthlyAnnual
Grow
For teams shipping fast
25,000
sessions/mo
3
sites
30 days
retention
✓All 18 signals
✓Slack + webhook alerts
✓Full element breakdown
✓Frustration snapshots
✓Deploy correlation
✓Basic flow analytics
FLUSTERDUCK
Grow
$39/mo
Launching Q3 2026
Integrations
Alerting, CI/CD, issue tracking, observability, revenue.
SlackSlack
LinearLinear
GitHubGitHub
VercelVercel
DatadogDatadog
StripeStripe
PagerDutyPagerDuty
JiraJira
GrafanaGrafana
ShopifyShopify
DiscordDiscord
GitLabGitLab
SegmentSegment
New RelicNew Relic
flusterduck

Stop guessing. Start monitoring.

One script tag. First data in under 5 minutes.