npm vulnerability scanner vs npm audit vs Snyk

A detailed, honest comparison of the top npm security tools. Which npm vulnerability scanner is right for you?

Quick comparison table

Feature	npm vulnerability scanner	npm audit	Snyk	OSV-Scanner
Free / open-source	Yes (MIT)	Yes	Free tier limited	Yes
No account / no API key	Yes	Yes	Requires login	Yes
One-command fix (npm install a@x b@y)	Yes	npm audit fix (less granular)	Yes	Lists fixes
SPDX 2.3 SBOM	Yes	No	Paid only	No
CycloneDX 1.4 SBOM	Yes	No	Paid only	Via cdxgen
Web UI	Yes	CLI only	Paid dashboard	CLI only
GitHub Action (reusable)	Yes	No	Yes	Yes
CLI	Yes (bunx)	Built-in	Yes	Yes
JSON output for CI	Yes	Yes	Yes	Yes
Data source	OSV.dev	npm registry	Snyk DB (proprietary)	OSV.dev
License	MIT	Artistic-2.0	Proprietary	Apache-2.0

When to use npm audit

npm audit is built into every npm install — it's always there, zero setup. If you just want a quick local check of your dependencies, it's fine. The npm audit fix command auto-upgrades vulnerable packages. However, it's CLI-only, terse, doesn't generate SBOMs, and doesn't give you per-vulnerability copy-and-run fix commands. It also uses npm's own advisory database rather than the broader OSV.dev ecosystem.

When to use Snyk

Snyk is a commercial product with a free tier. It's powerful — it scans code, containers, IaC, and dependencies, and has IDE integrations. But it requires an account, the free tier is limited, and the SBOM features are paid-only. If you're an enterprise with budget and want a polished commercial solution, Snyk is great. For individual developers or small teams who want a free, no-account tool, Snyk is overkill.

When to use OSV-Scanner

Google's OSV-Scanner is excellent — free, open-source, uses the same OSV.dev data source as this npm vulnerability scanner. It's a CLI tool that scans multiple languages (not just npm). However, it's CLI-only (no web UI), doesn't generate SBOMs natively (you need cdxgen separately), and doesn't provide one-command fix commands.

When to use this npm vulnerability scanner

This tool is built for developers who want:

Free, no account — just paste and scan
A web UI — paste package.json in the browser, no install
One-command fixes — the exact npm install pkg@safeVersion you need
SBOM generation — SPDX 2.3 + CycloneDX 1.4 for compliance
CI/CD integration — GitHub Action + CLI with JSON output
No downgrade recommendations — every fix is strictly an upgrade

Bottom line

If you just need a quick local check: npm audit. If you're an enterprise: Snyk. If you scan multiple languages: OSV-Scanner. If you want a free, no-account npm vulnerability scanner with a web UI, SBOM generation, one-command fixes, and CI/CD integration: this tool.

Try the npm vulnerability scanner now — free, no signup.

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