Fewer things to look at, not more
On a real marketing site most of what a visual diff flags is noise — a rotating testimonial, a lazy-loaded image, a carousel on a different slide. Diffy and RegressionBot both tolerate layout shift. The difference is what happens to the rest of the noise: Diffy asks you to tune it, or their team tunes it for you. RegressionBot classifies it away and tells you what actually changed.
Where Diffy is strong
Diffy is genuinely good at this. It handles vertical shifts rather than naively pixel-diffing, captures logged-in pages, mocks dynamic content, and has a mature review workflow with thumbnails and keyboard shortcuts. If you want a checklist-complete agency tool today, it is a fair choice — this page is about one specific difference.
Diffy
Shows you where the page differs and leaves the triage to you. Their published answer to recurring false positives is that you flag them and their team adjusts your settings.
RegressionBot
Classifies each region as added, removed, moved or restyled and writes it up in plain English, so a run with twenty flagged regions becomes one sentence you can act on.
RegressionBot vs Diffy, point by point
Checked against Diffy's own pricing and feature pages on 26 July 2026.
| Diffy | RegressionBot | |
|---|---|---|
| Tolerates layout shift (no cascade of false positives) | Yes — custom shift-aware algorithm | Yes — DOM-aligned reflow walk |
| Separates real changes from page noise | You tune settings; their team helps on request | Classified automatically on every run |
| Says what changed, not just where | Not offered | Typed regions plus a plain-English summary |
| Per-project rules for what to ignore | Masking and mock content | Masking plus AI instructions in your own words |
| MCP server for coding agents | No — CLI and GitHub Action | Yes |
| Free tier | 500 screenshots/mo, 2 environments, 1 month retention | 7-day trial |
| Paid entry (both meter per page, per viewport, per run) | $67/mo billed annually for 2,000 screenshots | $9/mo for 2,500 comparisons |
Stop squinting at red pixels.
When a layout changes, RegressionBot doesn't just throw a broken test and a red box at you. It uses vision models to understand the DOM and explain exactly what changed—and whether it matches your intent.
Changes detected:
- The hero icon was updated from a square to a checkmark (A).
- A new "Admin Dashboard" navigation item was added to the sidebar (B).
- Text phrasing in the configuration paragraph was modified (C, D).
- A new "Project Configuration Locking" section was inserted (E).
- The active state indicator in the Table of Contents was shifted (F).
✓ These changes match the provided PR description: "Add Admin Dashboard to sidebar and document configuration locking."
Storage Configuration
Learn how to configure Pulse to preserve visual snapshot records and perform comparisons across pipeline runs.
Configure Pulse to preserve visual snapshot records securely in Csecure cloud storage and comparing from Dstored baseline images on future pipeline runs.
Lock parameters during a run to prevent visual baseline regression drift across environments.
Frequently asked questions
Ready to ship with confidence?
Start catching visual changes before they reach production. Start your 7-day free trial today. No credit card required.