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Fidel vs Hypermatic

Hypermatic overlays screenshots inside Figma so you can manually inspect alignment. Fidel runs in CI and tells you exactly what’s wrong -expected vs actual values -on every PR.

TL;DR

Hypermatic is a Figma plugin. You paste a URL, it captures a screenshot, and overlays it on your Figma frame so you can inspect alignment manually. It’s useful for one-off design checks inside Figma. Fidel is a GitHub Action. It compares your live page against the Figma spec automatically on every PR, reports expected vs actual values per CSS property, and posts severity-ranked results to the pull request. The two tools live in different parts of the workflow: Hypermatic is for a designer doing a spot check; Fidel is for a team running automated design QA in CI.

At a Glance

Feature Comparison

Fidel Hypermatic
How it runs Automatically -every PR in CI Manually -triggered inside Figma
Where results appear Pull request comment Figma canvas overlay
Output Expected vs actual per CSS property Screenshot opacity overlay -visual only
CI integration GitHub Action + GitHub App None
Scoring 0–100 match score None
Properties checked 28 CSS properties per element Pixel overlay -no property data
Requires Figma user No -runs headlessly in CI Yes -must be run inside Figma
Automation Fully automated Manual trigger only
Designers in loop Via PR comment, shareable reports Designer must run it themselves
Setup GitHub Action YAML -Figma URL + deploy URL Figma plugin install
Pricing Free tier available Figma plugin pricing

What Hypermatic does well

Genuine respect. Hypermatic does exactly what it says -lets designers and QA engineers quickly see how closely a live page aligns with the Figma frame without leaving Figma. For freelancers, small agencies, or designers doing one-off checks, it’s fast and requires no engineering involvement.

The overlay approach is intuitive -you see the mismatch visually without needing to know which properties are wrong. There’s no CI setup, no YAML, no engineering dependency.

Hypermatic is the right tool when a designer needs to quickly spot-check a staging build inside Figma.

Hypermatic -Visual Overlay
Trigger Manual -run inside Figma
Output Screenshot overlay
Question "Does this look right?"
Setup Figma plugin install
CI integration None
Fidel -Design Validation
Trigger Automatic -every PR
Output Property diff -expected vs actual
Question "What is the exact mismatch?"
Time 3.4s median
CI integration GitHub Action + GitHub App

What Fidel does differently

The differentiation is automation, property data, and CI integration. Fidel doesn’t do a visual overlay -it does property-level diffing. Hypermatic answers “does this look right to my eye?” Fidel answers “font-size: expected 16px, found 14px; color: expected #6236d4, found #6040d0.”

Both are useful questions, but different questions. The second differentiator is automation. Hypermatic catches drift only when someone runs it. Fidel runs on every PR automatically. A team shipping 10 PRs a week gets Fidel results on all 10 -without a designer needing to open Figma each time.

Results appear on the pull request, with expected vs actual values, so the developer can fix it in the same context where they’re reviewing their own code.

The gap visual overlay can’t fill

Visual overlay is a powerful inspection tool and a poor tracking tool. It tells you whether something looks wrong right now -it does not tell you which PR introduced the problem, what the exact property values are, or whether the issue is High or Medium severity. It cannot generate a PR comment with actionable details for the developer to fix.

And because it requires a manual trigger, it only runs when someone specifically decides to run it. Drift that sneaks in across several small PRs will never be caught unless a designer happens to run Hypermatic on that page at the right moment.

Fidel closes this loop. Results appear on the PR, attributed to the commit that introduced the issue, with expected vs actual values, so the developer can fix it in the same context where they’re reviewing their own code. No Figma session required.

Ready to try it? Sign up for the beta -two inputs, runs in CI in seconds.

Recommendation

Who should use what

Choose Fidel if you…

  • Need design validation in CI -results on every PR, not on demand
  • Want expected vs actual values per CSS property, not just a visual overlay
  • Team is engineering-led and wants results in the PR, not in Figma
  • Want a match score that tracks design accuracy over time
  • Need to catch drift from AI-generated or refactored code systematically

Choose Hypermatic if you…

  • Need a quick visual spot-check inside Figma without CI knowledge
  • You’re a designer or freelancer doing one-off validation
  • Don’t have CI set up or don’t need automated validation
  • The workflow is designer-led and you want to stay inside Figma

Complement, not substitute. Hypermatic and Fidel work at different points in the workflow. Hypermatic is for the designer doing a visual spot-check in Figma. Fidel is for the team running automated validation in CI. Some teams use both: Fidel catches drift on every PR, and a designer uses Hypermatic for a final visual sign-off before launch.

Questions

Frequently Asked

Hypermatic is a Figma plugin for manual visual overlay comparison -paste a URL, it captures a screenshot, and overlays it on the Figma frame so you can inspect alignment manually. Fidel is a GitHub Action that automatically compares your live page against the Figma spec in CI, reports expected vs actual property values per CSS property, and posts severity-ranked results to the pull request. Manual inspection vs automated validation.
Yes. They address different questions at different points in the workflow. Fidel catches property-level drift automatically on every PR. Hypermatic is useful for a designer doing a final visual check inside Figma before launch. Many teams use Fidel for automated CI validation and Hypermatic for a last-mile designer review.
It depends on the workflow. If the primary use case is a designer doing one-off visual checks inside Figma, Hypermatic is simpler. If the team wants automated validation on every PR -with expected vs actual values and CI integration -Fidel is the right tool. They are not direct substitutes.
Visual overlay tells you whether something looks right. Property-level diffing tells you exactly what is wrong and the correct value -for example: font-size: expected 16px, found 14px. That makes issues immediately actionable for the developer fixing the PR, without needing to eyeball an overlay.
Yes. Fidel runs headlessly in CI. Engineers don’t need Figma accounts. The GitHub Action fetches the Figma spec via API using credentials set once at the repo level. Results appear directly on the pull request.
Fidel reports issues at three severity levels. Teams can use severity thresholds to determine what blocks a PR vs what’s informational. The match score tracks overall design alignment over time, even on teams where the spec is not pixel-precise.

Property-level diffs on every PR

Hypermatic shows you where it looks wrong. Fidel tells you what’s wrong -expected vs actual values, severity-ranked, on every PR.

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