Decision timing
SCA tools
After dependencies are already in use.
Chainsaw
Before the package enters a build.
Why not just SCA?
SCA reports. Chainsaw refuses. Run both.
SCA tells you what's already inside your build. That's reporting, not control.
Chainsaw sits on the install path and refuses the request before bytes land — on CVE, license, version, and the attack-pattern signals SCA misses: install-script exfiltration, maintainer takeover, worm bursts, dependency confusion. Run both.
What the control point does
SCA tools
Reports on exposure across repos, pipelines, and environments.
Chainsaw
Refuses non-compliant installs on the install path.
How teams adopt it
SCA tools
No phased enforcement. Flip from off to alerts only.
Chainsaw
Monitor impact in a safe mode before enforcing. Flip rule by rule.
Response to a newly disclosed CVE
SCA tools
Scan runs, ticket filed, developers open PRs to upgrade.
Chainsaw
Policy edit refuses the affected version at install. No code changes needed to stop new spread.
Coverage of supply-chain attack patterns
SCA tools
Focused on known CVEs and licenses. Install-script exfiltration, maintainer takeover, and worm bursts typically slip past.
Chainsaw
Up to 25 supply-chain signals beyond CVE on supported ecosystems: install scripts, publisher changes, version anomalies, hidden Unicode, publish velocity, and more.
Real-world attacks caught at install
SCA tools
Generally none — these slip past CVE-based feeds: Shai-Hulud, PhantomRaven, GlassWorm, Axios v1.14.1, event-stream, ua-parser-js.
Chainsaw
Each maps to a named signal family on the policy page — publish-velocity bursts, install-script exfiltration, hidden Unicode, maintainer-account takeover.
Scope of control
SCA tools
Dependency-level visibility. Governance lives in the ticket queue.
Chainsaw
Policy at the install surface: vulnerabilities, licenses, versions, provenance, and attack signals.
Can an install route around the policy?
SCA tools
There's no install-path gate to route around — the scan reports either way.
Chainsaw
The proxy is the gate, and CI, endpoint, and network controls close the ways around it. Enforcement closure, with an audit trail that shows the gap is shut.
Feature matrix
Reporting vs. install-time control
| Capability | SCA tool Snyk · Sonatype · Mend | Chainsaw Install-time policy proxy |
|---|---|---|
| Dependency inventory / SBOM Know what's in your apps. | Yes | Partial |
| CVE reporting & alerts | Yes | Partial |
| Refuses a package before it reaches a build | No | Yes |
| License policy at install time Refuse GPL in production, for example. | Partial | Yes |
| Monitor-only mode before enforcing | No | Yes |
| Policy response to a new CVE Stop new installs without waiting on upgrade PRs. | No | Yes |
| Post-install reporting | Yes | Partial |
| Refuses supply-chain attacks beyond CVE Install-script exfiltration, maintainer takeover, worm bursts, dependency confusion. | No | Yes |
| Checksum fail-closed on upstream fetch | No | Yes |
| Works alongside your existing SCA | — | Yes |
Want to see it in practice?
Compare your current SCA coverage to install-time control
Start with a free org. Turn on monitor mode. See what Chainsaw would have refused this week before changing anything.