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Comparison

Foundation Machines vs SonarQube.

SonarQube is a self-hosted code-quality platform with security rules. Sebastion AI is a PR-native AI security reviewer. Where each one wins.

SonarQube (and SonarCloud) is the long-standing code-quality platform — code smells, duplication, coverage gates, plus a growing security ruleset. It's self-hosted by default, language-rich, and well integrated with enterprise CI. Sebastion AI is much narrower: a security-only AI reviewer that runs as a GitHub App and posts inline PR comments. We don't try to be a code-quality platform; we're the security pass on top.

Visit SonarQube to evaluate them directly. We try to keep this comparison accurate; let us know if anything is wrong.

Side by side

What you get from each.

Capability
Foundation Machines
SonarQube
Primary focus
Security-only PR review
Code quality (smells, coverage) + security rules
Deployment
Hosted GitHub App, install once
Self-hosted SonarQube or SonarCloud SaaS
PR-native
Yes, primary surface
Yes via PR decoration
Autofix
Draft fix PRs with PoC tests
Manual remediation; some auto-fix in IDE
Detection model
AI reviewer (LLM + framework-aware)
Static rules across many languages
Free tier
Free for public repos
Community Edition; SonarCloud free for OSS
Paid pricing
$19/mo Pro, Team usage-only (credit packs)
Tiered per-LOC (Developer / Enterprise)

Choose SonarQube when

You want one self-hosted platform owning code-quality gates and basic security across many languages, often as part of a regulated change-control process. Sonar's entrenchment in enterprise CI is real.

Choose Sebastion AI when

You want a focused, AI-native security reviewer on every PR without standing up a platform. Sebastion installs as a GitHub App, posts findings as review comments, tags severity and CWE id, and ships fix PRs. Free for public repos, $19/dev/mo for private.

Try Foundation Machines on your next PR.

Free for solo developers and OSS maintainers. Install Sebastion and review your next pull request in under a minute.

  • 2-click install
  • No credit card