Agent skills can screenshot what was just built — a point-in-time check. UICanary is the persistent layer underneath: baselines across every branch, multi-viewport diffs on every PR, and a review workflow your team can trust for months, not minutes. One line in your GitHub Action. No screenshot quotas.
$1 is a fully refundable deposit · No credit card for the free tier · Cancel anytime
AI writes UI 10× faster — and ships visual bugs 10× faster too.
Your agent can verify what it just built — but what about the next PR? The next branch? The staging deploy at 2am? Screenshots evaporate; regressions creep back in. A one-off check is not a system of record.
Percy's free tier is 5,000 screenshots a month. Ship 10 PRs a day across 5 pages × 3 viewports and you're done by week two. AI assistants made you iterate 10× faster — per-screenshot billing taxes exactly that.
Playwright screenshots plus a loose threshold catch big layout shifts — and drown you in font-rendering and animation false positives. No review UI, no PR comments, no baseline management across branches and OSes.
Agent skills answer "is this change OK?" — once. UICanary answers "did every release stay correct?" — always.
| UICanary | Percy | Agent skills (ProofShot / pursr) | Playwright DIY | |
|---|---|---|---|---|
| Answers | "Did every release stay correct?" | Same | "Is this change OK?" (one-off) | "Here's a PNG, you figure it out" |
| Baselines across branches | Yes | Yes | No | DIY |
| Multi-viewport in one run | Yes | Yes | Manual | DIY |
| Team review workflow | Yes | Yes | No | No |
| Noise management over time | Yes | Partial | No | DIY |
| Screenshot quotas | None — pay as you go | Yes | None | None |
| Starting price | $19/mo (early bird) | Free 5k/mo, then quote-based | Free | Free |
One line in your workflow. Baselines from the first run.
Paste the Action, add your API key as a secret. Done in 5 minutes.
Desktop, tablet, mobile — baselines stored per branch, history kept.
Diffs grouped by what actually changed: review 6 real changes instead of 60 screenshots. See when something broke, not just that it broke.
# .github/workflows/visual.yml - name: Visual regression uses: uicanary/visual-regression@v1 # placeholder action name with: api-key: ${{ secrets.UICANARY_API_KEY }} viewports: "1280x800, 390x844" threshold: 0.1
Everything a one-off screenshot check can't do.
Baselines stored per branch, with full run history — audit when anything broke, not just that it broke.
Built for AI-iteration workflows — diffs clustered by what actually changed, so you review 6 real changes instead of 60 screenshots.
Per-project tuning for fonts, animations, timestamps and dynamic content — false positives go down over time instead of piling up.
Desktop, tablet, mobile in one run.
Scale with your PR velocity, not against it.
Encrypted in transit and at rest; configurable retention; export or delete baselines anytime. Removing us is one line in your workflow file.
Start free. Lock in early-bird pricing for life before launch.
Free tier opens at launch — join the waitlist.
$1 is a fully refundable deposit. If we don't launch, you get it back — no questions asked.
Launches after the early-bird window closes.
Straight answers, no marketing fog.
$1 reserves $19/mo for life. Refundable if we don't launch.
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