Argos vs BackstopJS

From $30 per month (indicative)

Free and open source

Transparent, low pricing relative to the category incumbents.

Free and open source. You pay in engineering time and CI minutes.

Free tier with a monthly screenshot allowance; free for open-source projects.

Everything, self-hosted

Emerging

Argos · since 2017

Established

OSS community · since 2015

• Clean, fast PR review experience.
• Genuinely affordable, with a workable free tier.
• Open source, so self-hosting is a real fallback.

• Free with no snapshot quota — run it as often as you like.
• Baselines stay in your repository, which suits regulated or air-gapped environments.
• Simple JSON configuration that a junior engineer can extend.

• Fewer integrations than Percy or Applitools.
• Small team behind it.
• Limited cross-browser rendering options.

• Pixel-diff comparison means font rendering differences between machines cause false failures; Docker is effectively mandatory.
• No hosted review or approval workflow — approving means committing new images.
• Reference images bloat the Git repository over time.

Small and mid-sized teams wanting visual review in PRs at a sane price.

Teams that need visual testing without a SaaS vendor or a per-snapshot bill.