Pricing
Today: KERN-guard. Soon: kern-sight, kern-mcp-security, and the KERN One bundle.
Monthly billing. Cancel any time. Public repos are free forever.
Free
For public repos and kicking the tires.
Unlimited public repos
Up to 3 private repos
144 AST rules on every PR
Delta-only PR comments
5 LLM reviews / month trial
Community support
Pro BYOK
Bring your own Anthropic or OpenAI key. No per-review markup.
Everything in Free
Unlimited private repos
Unlimited reviews using your API key
Priority queue
Email support
Requires Anthropic or OpenAI key
Most popular
Pro Hosted
No API key needed — we pay the provider.
Everything in Free
Unlimited private repos
100 LLM reviews / month included
$0.20 per additional review
Priority queue
Email support
Coming soon
KERN One
The bundle. KERN-guard, kern-sight, and kern-mcp-security in one.
Everything in KERN-guard Pro
Everything in kern-sight Pro
Everything in kern-mcp-security Pro
Early access to new targets + custom rules
Cross-product priority support
You provide your own Anthropic or OpenAI API key. Reviews run on your account — no per-review markup from us. Ideal for teams with existing AI budget or high review volume.
The KERN product line
KERN-guard ships first. kern-sight and kern-mcp-security follow.
Observability for KERN code. Trace guards, effects, and boundaries across deployments. Coming soon.
Hosted MCP server scanner. 12 OWASP MCP Top 10 rules. CI and dashboard. Coming soon.
Per GitHub installation. One price covers every collaborator on every repo in the installation — we don't count seats. Simple for small teams. Larger orgs may contact us for volume pricing as we roll it out.
Reviews keep running. You're billed $0.20 per additional review on your next invoice. No hard cutoff. Heavy users typically switch to Pro BYOK.
Yes. The portal at admin-guard.kernlang.dev lets you switch plans; your installation keeps its history and settings.
Not in v1. Yearly plans are coming in v1.1 with two months free. For now: monthly only, cancel any time.
No refunds on monthly charges. See our refund policy for yearly plans once available.