Vulkro vs Snyk

If you are choosing a security scanner for a codebase that AI assistants now write much of, two questions come before any feature list: where does your code go when the tool runs, and does the tool give the same answer twice. This page compares Vulkro and Snyk on both, then on a published benchmark you can rerun.

The two things this page leads with:

1. Your source code never leaves your machine. Snyk uploads code snippets to its cloud for analysis; Vulkro never uploads anything. This is the sharpest architectural distinction in the whole comparison set.
2. Vulkro's accuracy numbers are reproducible. On our published corpus Vulkro scores precision 0.81, recall 0.58, F1 0.68 at its default high-confidence setting. The harness, the corpus, and the scoring code are public; Snyk's numbers are vendor-published claims.

Snyk is the gravity well of commercial SAST + SCA. Big enterprise deployments, IDE plugins for every editor, polished onboarding, extensive vulnerability database. The decision comes down to your data-handling posture: Snyk is SaaS-first, Vulkro is offline-first.

At a glance​

Benchmark numbers​

Measured on our published corpus, July 2026: 15 deliberately vulnerable public codebases with 90 catalogued bugs, of which 76 sit in the languages the benchmarked release analyzes deeply (JS/TS, Python, Go). Scored at Vulkro's default high-confidence setting.

Snyk Code is not in the published corpus run, and this page invents no numbers for it: the tool is auth-gated (snyk auth plus an account), the harness skips it when unauthenticated, and a terms-of-service check on benchmarking it is still pending. The point stands anyway: Vulkro's numbers are reproducible against the open SAST field (Semgrep CE, Bearer), while Snyk's are vendor-published. One honesty note: in July 2026 we grew our own ground truth from 69 to 90 catalogued bugs and published the recall drop that came with it; the corpus is versioned and the numbers regenerate from one command.

$ bench/comparison/run.sh --tier1 --tools vulkro,semgrep,bearer  ·  scores: bench/comparison/scorecard-high.md

The architectural distinction​

Snyk is a SaaS product. The CLI is a convenient surface, but the analysis (for Snyk Code) and the vulnerability database (for Snyk's SCA product) live in Snyk's cloud. Even when you point Snyk at a local project:

• Code snippets are uploaded to Snyk's servers for analysis.
• Findings are stored in your Snyk account, visible to anyone with org access.
• The CLI requires authentication; offline operation is limited to running the broker proxy.
• Pricing is per-developer per-month on a subscription that keeps renewing until you explicitly cancel.

Vulkro scans locally. The detection engine + CVE bundle both live on your machine, and analysis never uploads a byte of source. VULKRO_OFFLINE=1 enforces zero network calls at the process boundary (air-gapped machines pair it with a license file). Vulkro requires an account; a 14-day trial of the full product (compliance packs, portfolio, deep detector packs, active probe) starts on your first sign-in, and licenses are issued per seat, directly by our team, at [email protected].

The contrast cuts hardest in three buyer scenarios:

1. Defense / FedRAMP / regulated industries where customer data cannot touch a vendor cloud. Snyk's broker proxy mitigates some of this; Vulkro removes the question entirely (no proxy needed; no upload exists).
2. Teams that want a deterministic CI scan whose result never depends on a vendor's cloud analysis being reachable.
3. Procurement teams burned by SaaS renewals that nobody owns the cancellation for. Nothing bills you automatically: licenses are issued directly by our team with explicit terms.

Where Snyk wins​

Concessions first, because they are real:

• Ecosystem breadth. IDE plugins for every editor, GitHub PR comments, JIRA / ServiceNow integrations, and years of enterprise deployment polish. Vulkro's integration surface is narrower.
• More languages. Snyk Code analyzes most modern languages; Vulkro's deep analysis is JavaScript/TypeScript, Python, Go, and Java (Spring).
• A managed vendor relationship. Onboarding, dedicated CSMs, and contractual SOC 2 coverage from the vendor, if that is what your procurement process needs.
• AI-assisted fixes. DeepCode AI fix is a real feature Vulkro deliberately does not have (Vulkro's autofix is deterministic templates, no LLM); if an AI fix loop inside the vendor tool is what you want, Snyk has it.

All of it comes with the cloud upload and the SaaS billing posture described above. If those are acceptable, Snyk is a strong product.

When to pick Vulkro​

• Source upload to a vendor is a hard "no" in your contract or policy.
• Your CI scan must not depend on a vendor's cloud analysis being reachable: Vulkro analyzes on the runner itself, and a license file removes even the entitlement check.
• You want the bench numbers (precision / recall / F1) to be externally reproducible, not vendor-published.
• You prefer licensing without a surprise renewal. Licenses are issued directly by our team with explicit terms; nothing bills you automatically.
• You want OWASP API Top 10 + LLM Top 10 (LLM01 / LLM06) without a separate AI Trust add-on.
• Create an account and your first CLI sign-in starts a 14-day trial of the full product; licenses are issued per seat, directly by our team.

What about migration?​

Vulkro doesn't yet have a direct Snyk-rule-import shim like vulkro rules import-semgrep. Snyk Code rules are proprietary and not exported in a portable format. The migration path is:

1. Run Snyk for the categories you already track.
2. Run Vulkro alongside; both emit SARIF that GitHub Code Scanning ingests.
3. Diff the findings for a release cycle to calibrate trust.
4. Drop the Snyk subscription on renewal (no clawback; you keep any existing findings you've already exported).

Try both side by side​

# In your project root:
vulkro scan . --format sarif > vulkro.sarif
snyk test --sarif-file-output=snyk.sarif

# Diff in your favourite SARIF viewer.

Both tools emit SARIF; GitHub Code Scanning ingests either format.

See also: Vulkro vs Semgrep, Vulkro vs Bearer, Vulkro vs Trivy, Compare the scanners, Safety, CVE bundle changelog.