Freedom251 › Visual Regression Testing Software
SnapDiff
What SnapDiff is
SnapDiff captures web pages and compares screenshots pixel by pixel to help teams find visual regressions. Its HTTP API can compare two URLs without a test suite or CI/CD pipeline, and each diff includes a percentage, an image highlighting changed areas, and bounding boxes around them. The GitHub Action runs visual checks on pull requests and can discover Vercel preview URLs automatically. For ongoing checks, the watch API monitors URLs on a cron schedule and sends webhooks when changes exceed a threshold.
Comparisons use pixelmatch and include antialiasing detection, configurable thresholds, ignore regions, and CSS selector masking. SnapDiff accepts HTTPS URLs for previews, staging sites, Storybook, and deployments on Vercel, Netlify, and Cloudflare Pages. Its MCP server supports Claude Code, Cursor, Windsurf, and other MCP clients. During capture, the service says it hides 40+ cookie banners and 20+ chat widgets, and blocks 30+ ad and tracker domains. Plans range from Free to Scale; paid plans start at $19 a month. SnapDiff is operated by Corra LLC, a California company based in Sacramento.
Who it suits
SnapDiff suits developers and teams who want to compare web page appearances from URLs, automate checks on pull requests, or monitor pages on a schedule. Its API can work without a test suite or CI/CD pipeline, while its GitHub Action and MCP server support additional workflows.
What it does well
- Compare two URLs through an HTTP API without a test suite or CI/CD pipeline.
- Diffs include a percentage, highlighted image, and bounding boxes.
- GitHub Action checks pull requests and can find Vercel preview URLs.
- Scheduled URL monitoring can send threshold-based webhooks.
- Comparison controls include ignore regions and CSS selector masking.
What to know first
- The Free plan allows 200 diffs and 2,000 screenshots per month.
- The Free plan has zero watchers and a 10 requests-per-minute limit.
- Paid plans start at $19 a month.
Limits
The Free plan includes 200 diffs per month, 2,000 screenshots per month, zero watchers, and 10 requests per minute. Usage above plan allowances costs $0.01 per diff and $0.002 per screenshot; diff screenshots do not count toward the screenshot quota.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 200 diffs/month · 2,000 screenshots/month · 0 watchers · 10 req/min | Free |
| Team | Monthly · 20,000 diffs/month · 60,000 screenshots/month · 50 watchers · 300 req/min · MCP server access | $119 a month |
| Dev | Monthly · 1,000 diffs/month · 5,000 screenshots/month · 3 watchers · 30 req/min · MCP server access | $19 a month |
| Scale | Monthly · 100,000 diffs/month · 300,000 screenshots/month · 200 watchers · 1,000 req/min · MCP server access | $299 a month |
| Pro | Monthly · 5,000 diffs/month · 15,000 screenshots/month · 15 watchers · 120 req/min · MCP server access | $59 a month |
As snapdiff.ai lists them, read 7 Oct 2026. The maker's own page has the final word.
Getting started
- Open snapdiff.ai.
- Use the web service or API with HTTPS preview, staging, Storybook, or deployed URLs.
- Compare two URLs through the HTTP API, or use the GitHub Action for pull request checks.
- Choose the Free plan or a paid plan; the Dev plan includes MCP server access.
- For scheduled checks, configure URL monitoring through the watch API.
Verdict
Choose SnapDiff if you need pixel-based page comparisons, pull request checks, or scheduled URL monitoring. The Free plan has no watchers, and teams needing higher allowances or MCP server access must choose a paid plan starting at $19 a month.
Questions
Does SnapDiff have a free plan?
Yes. The Free plan costs nothing and includes 200 diffs and 2,000 screenshots per month.
How much do paid plans cost?
Dev is $19 a month, Pro $59 a month, Team $119 a month, and Scale $299 a month.
What platforms does SnapDiff support?
Its listed platforms are API and web.
Can SnapDiff run checks in CI?
Yes. Its GitHub Action runs visual checks on pull requests and can discover Vercel preview URLs automatically.
Who operates SnapDiff?
SnapDiff is operated by Corra LLC, a California limited liability company with a registered address in Sacramento, California.
How long are screenshots retained?
Screenshots and diff images are retained during the subscription and for 30 days afterward, then deleted from object storage.
Facts from SnapDiff's own pages
- AI tools
- The MCP server supports Claude Code, Cursor, Windsurf, and other MCP clients for verifying UI changes. · snapdiff.ai, 7 Oct 2026
- Capture cleanup
- The service says it auto-hides 40+ cookie banners and 20+ chat widgets and blocks 30+ ad and tracker domains during capture. · snapdiff.ai, 7 Oct 2026
- CI integration
- Its GitHub Action runs visual checks on pull requests and can discover Vercel preview URLs automatically. · snapdiff.ai, 7 Oct 2026
- Comparison controls
- Comparison uses pixelmatch with antialiasing detection, configurable thresholds, ignore regions, and CSS selector masking. · snapdiff.ai, 7 Oct 2026
- Data retention
- Screenshots and diff images are retained during the subscription and for 30 days afterward, then deleted from object storage. · snapdiff.ai, 7 Oct 2026
- Diff output
- A diff returns a percentage, highlighted diff image, and bounding boxes around changed regions. · snapdiff.ai, 7 Oct 2026
- Headquarters
- Sacramento, California, United States · snapdiff.ai, 28 Sept 2026
- Maker
- SnapDiff is operated by Corra LLC, a California limited liability company with a registered address in Sacramento, California. · snapdiff.ai, 7 Oct 2026
- Purpose
- SnapDiff captures web pages and compares screenshots pixel by pixel to detect visual regressions. · snapdiff.ai, 7 Oct 2026
- Scheduled monitoring
- The watch API monitors URLs on a cron schedule and sends webhooks when visual changes exceed a threshold. · snapdiff.ai, 7 Oct 2026
- Security
- The privacy policy states traffic uses TLS 1.2+, API keys are stored as hashes, and sensitive integration credentials are encrypted at rest. · snapdiff.ai, 7 Oct 2026
- Support
- The contact form says SnapDiff will respond to questions, feedback, or enterprise pricing inquiries within one business day. · snapdiff.ai, 7 Oct 2026
- Supported inputs
- It accepts preview, staging, Storybook, and other HTTPS URLs, including deployments on Vercel, Netlify, and Cloudflare Pages. · snapdiff.ai, 7 Oct 2026
- Usage overages
- Usage beyond plan allowances costs $0.01 per diff and $0.002 per screenshot, while diff screenshots do not count against the screenshot quota. · snapdiff.ai, 7 Oct 2026
- Workflow
- It can compare two URLs through an HTTP API without requiring a test suite or CI/CD pipeline. · snapdiff.ai, 7 Oct 2026
Where SnapDiff stands on Freedom251
- Visual Regression Testing Software#18 of 26