Snyk vs GitGuardian vs GuardLayer for Indie Devs

For an indie dev on Next.js + Supabase: GitGuardian owns secrets detection (free for teams under 25 devs), Snyk owns breadth (SCA plus SAST, but with a five-seat minimum on paid), and GuardLayer owns stack-specific footguns like disabled RLS at a flat per-repo price. They overlap less than you'd expect — most solo devs end up using two of the three, not one.

"Which scanner should I use" is the wrong question if you're one person shipping a Next.js + Supabase app. These three tools solve different problems, and the honest answer is usually a combination, not a single winner. Here's what each is good at, what it costs in 2026, and where it leaves a gap. Disclosure: GuardLayer is our tool, so weigh the last section accordingly — the pricing and capabilities below are stated straight and verifiable on the vendor pages.

The problem all three are fighting is getting worse. GitGuardian's State of Secrets Sprawl 2026 found roughly 29 million new secrets leaked in public GitHub commits during 2025 — a 34% jump year over year, the largest in the report's history. AI-assisted commits leaked secrets at measurably higher rates than the baseline. Whatever you pick, "I'll just be careful" doesn't scale.

What each tool is actually for

Get the categories straight first, because comparing these three on price alone compares tools that don't do the same job.

• Snyk is a broad platform: SCA (dependencies scanned for known CVEs), SAST (code scanned for insecure patterns), plus container and infrastructure-as-code scanning. Breadth is the pitch.
• GitGuardian is a secrets specialist: API keys, tokens, and credentials committed to git history and other surfaces. It's arguably the strongest name in that one category.
• GuardLayer is a Next.js + Supabase specialist: it scans for the framework footguns the other two weren't built to find — disabled RLS, a service_role key reaching the browser, unvalidated API routes — and posts results as a PR comment plus a merge-gate check.

SCA, secrets, and stack-specific SAST are three different jobs. No single one of these tools does all three well.

Verified 2026 pricing

Pricing was verified in 2026 against each vendor's public plan page. Security pricing changes often — check before you buy.

The catch for solo devs is Snyk's five-seat minimum: its Team plan is priced per contributing developer, but Snyk's own plan page won't sell you fewer than five, so the realistic entry price is around $125/month even as a team of one (billing caps at 10 devs). GitGuardian is the opposite — its free tier covers teams under 25 developers, so for most indie hackers secrets scanning is effectively free. GuardLayer's flat per-repo model is cheapest when you run several small apps rather than one big one.

Which is best for a solo Next.js + Supabase dev?

Match the tool to your single biggest fear, then stack free tiers for the rest:

• "My biggest risk is a leaked key." GitGuardian, almost certainly on its free tier. Pair it with a local pre-commit hook so you catch keys before they ever hit GitHub.
• "My biggest risk is a vulnerable dependency." Snyk's free SCA is useful here — most breaches start in node_modules, not your code. Just know the paid jump has that five-seat minimum.
• "My biggest risk is a Supabase misconfiguration." This is the gap the other two don't cover, and it's the most common way vibe-coded apps leak. Neither a secrets scanner nor a dependency scanner will tell you a table shipped with RLS off.

That last point is why GuardLayer exists, and it's easier to show than argue. Here's a migration that creates a profiles table — email, Stripe customer ID, and an is_admin flag — and never enables RLS. A secrets scanner sees no secret. A dependency scanner sees no dependency. Here's what GuardLayer reports on this exact file — live engine output, not a mockup:

That table is now readable by anyone holding your public anon key. It's the exact class of bug behind CVE-2025-48757, where 303 endpoints across 170 Lovable-built Supabase apps were found exposing data to unauthenticated requests. GitGuardian and Snyk are excellent at what they do — neither would say a word about this migration.

So what should you actually run?

For most solo devs on this stack, the answer is two tools, not one:

• GitGuardian free for secrets, plus
• GuardLayer for Next.js + Supabase footguns (free for one repo), and
• Snyk free or a dedicated dependency scanner if npm install anxiety keeps you up at night.

That combination costs $0 to about $20/month and covers secrets, stack-specific code bugs, and dependencies with almost no overlap. If you want the wider field — Socket, Semgrep, Sonar and where each fits — we compared six tools in the best security scanner for solo devs guide. To see where your own repo stands, run a free scan and read the PR-style output for yourself.

FAQ

Is GuardLayer a replacement for Snyk or GitGuardian? No — it's a complement for a specific stack. Snyk covers dependencies and general SAST; GitGuardian covers secrets across your whole footprint. GuardLayer covers Next.js + Supabase framework footguns those tools weren't built to catch, like disabled RLS or a service_role key in the client bundle. Most solo devs on this stack run GuardLayer alongside one of the others, not instead of it.

Why does Snyk cost $125/month if I'm a solo dev? Snyk's Team plan is $25 per contributing developer per month with a five-seat minimum, so the smallest paid bill is around $125/month even for one person (it caps at 10 devs). The free tier is usable for small projects; the jump to paid is where solo devs feel the seat model. Flat per-repo pricing avoids that math entirely.

Is GitGuardian really free for a solo developer? For secrets scanning, effectively yes. GitGuardian's free tier covers teams under 25 developers with real-time detection, which comfortably includes a one-person shop. You'd only pay above that threshold, at $18 per active developer per month.

Can one tool cover secrets, dependencies, and Supabase config? Not well. Bundled platforms exist, but coverage and quality vary by category, and bundling usually means a per-seat price. Solo devs generally get better results — and a lower bill — combining specialized free tiers: one for secrets, one for dependencies, and a stack-fit scanner for framework-specific code and config bugs.