Tool Comparison
GateTest vs ESLint
What a syntax-tree linter does not check
ESLint is great at what it does — and what it does is pattern matching on syntax trees. GateTest is 122 modules in one: it includes everything ESLint does, plus security scanning, AI code review, N+1 detection, accessibility, performance, mutation testing, and 60 more dimensions that no linter can touch.
The linting iceberg
ESLint catches the surface — style violations, unused variables, missing semicolons. GateTest also scans below the waterline:
- Syntax errors
- Unused variables
- Consistent style
- Simple anti-patterns
- N+1 database queries
- SSRF vulnerabilities
- Race conditions
- Resource leaks
- PII in logs
- Prompt injection
- Float money bugs
- Import cycles
- TLS bypass patterns
- ReDoS regex
- Accessibility (WCAG)
- Visual regression
Feature Comparison
| Feature | GateTest | ESLint |
|---|---|---|
| Syntax & style linting | ✓ | ✓ |
| TypeScript-aware checks | ✓ | ✓ |
| Auto-fix (code-level bugs, not just style) | ✓ | ✗ |
| AI code review (semantic bug detection) | ✓ | ✗ |
| Security vulnerability scanning | ✓ | ✗ |
| N+1 query detection | ✓ | ✗ |
| Race condition / TOCTOU detection | ✓ | ✗ |
| Accessibility scanning (WCAG 2.2, AA + AAA-aligned) | ✓ | ✗ |
| Performance analysis | ✓ | ✗ |
| Visual regression testing | ✓ | ✗ |
| Mutation testing (via GitHub Action) | ✓ | ✗ |
| Zero configuration required | ✓ | ✗ |
| Pay per scan (not per seat) | ✓ | ✗ |
| 122 scanning modules total | ✓ | ✗ |
What ESLint simply can’t do
Semantic understanding vs syntax patterns
ESLint matches patterns in your AST. It can tell you that you used == instead of === — but it can't tell you that the loop on line 47 makes a database query on every iteration. GateTest's N+1 detector understands what the code does, not just how it looks.
AI code review with real reasoning
GateTest's AI review reads your code with full context — the function, its callers, its data flow. The AI identifies real bugs: off-by-one errors in financial calculations, missing error handling in async chains, logic inversions in conditional branches. ESLint has no rule for any of this.
Security that ESLint plugins miss
eslint-plugin-security exists and it's useful — but it's limited to simple patterns. GateTest's security modules use data-flow analysis: tracking taint from req.body to fetch() to flag SSRF, following variable assignments across functions to find TLS bypass, detecting when cookie options flow into response headers without httpOnly: true.
Zero-config, cross-language
ESLint requires configuration per project and only runs on JS/TS. GateTest detects your stack automatically — JS, TS, Python, Go, Rust, Java, Ruby, PHP, C#, Kotlin, Swift — and applies the right checks with no configuration file required.
Frequently asked questions
Does GateTest replace ESLint, or do I use both?
GateTest includes an ESLint-equivalent lint module as one of 122. You get linting plus security scanning, performance analysis, accessibility checks, AI code review, mutation testing, and 60+ more dimensions — all in a single scan. Most teams use GateTest at the CI gate and optionally keep ESLint running in their editor for instant feedback while coding.
ESLint is free. Why would I pay for GateTest?
ESLint catches style and pattern violations. GateTest catches bugs that cost real money: N+1 queries degrading your database, race conditions in auth flows, SSRF vulnerabilities in API handlers, PII leaking into logs, float arithmetic breaking financial calculations. ESLint can't find any of those. The cost of one production incident exceeds a year of GateTest scans.
Does GateTest require an .eslintrc or configuration files?
No configuration files required. GateTest detects your project type automatically and applies the right rules. Zero setup: paste your repo URL and get results — no .eslintrc, no plugin hunting.
Can GateTest auto-fix issues like ESLint --fix?
ESLint --fix handles formatting and simple pattern replacements. GateTest's AI auto-fix (Scan + Fix, $199) handles actual bug fixes — adding validation guards, restructuring dangerous code patterns, fixing security misconfigurations — and opens a pull request with the changes for your review. The Forensic Scan tier ($399) goes deeper: AI-driven per-finding diagnosis, attack-chain correlation, a board-ready CISO report, and an executive summary. Mutation testing on your existing tests also ships via the GitHub Action with mutation: true — runs wherever your CI runs.
What does GateTest catch that ESLint misses?
ESLint is a pattern matcher — it checks syntax trees against rules. GateTest includes: AI-powered semantic code review (finds logic bugs ESLint rules don't cover), security scanning (OWASP Top 10 patterns), N+1 query detection, race condition analysis, resource leak detection, accessibility audits, performance profiling, visual regression, mutation testing, and 40+ more. ESLint cannot reason about what your code does — only how it's written.
Does GateTest support TypeScript like ESLint does?
Yes. GateTest's typescriptStrictness module goes beyond @typescript-eslint: it catches tsconfig regressions (strict: false, noImplicitAny: false), @ts-ignore abuse, and any-type leaks in exported signatures; the deadCode module catches unused exports. The lint module runs ESLint for TypeScript-specific style rules in the CLI and GitHub Action.
One gate. 122 modules. Zero config.
Keep ESLint in your editor. Add GateTest to your CI gate for everything ESLint can’t see.
Scan My Repo — From $29One-time payment per scan via Stripe — scan tiers never auto-renew. Continuous ($49/mo) and hosted MCP ($29/mo) are optional monthly plans.
This comparison is published against GateTest v1.62.0. Other tools change; if a claim here is out of date, tell us at support@gatetest.io and we will correct it.