Developer Tools · head to head
ESLint vs Microsoft Defender for Endpoint
Microsoft Defender for Endpoint
Cybersecurity
Enterprise endpoint security built into Microsoft 365
- From
- On request
- Free plan
- No
The short version
- Only ESLint has a free tier, so it costs nothing to try first.
- Each has a real cost: ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome; Microsoft Defender for Endpoint pricing not published on public websites; quote required from Microsoft sales
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which ESLint and Microsoft Defender for Endpoint actually diverge.
| Attribute | ESLint | Microsoft Defender for Endpoint |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | Unknown | quote |
| Free tier | Yes | No |
| Platforms | Browser-based JavaScript, Node.js, Any JavaScript environment | Windows, macOS, Linux, iOS, Android |
| Category | Developer Tools | Cybersecurity |
| Founded | 2019 | 1975 |
Identical on both: user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in ESLint
Nothing recorded that Microsoft Defender for Endpoint does not also cover.
Only in Microsoft Defender for Endpoint
- Threat & vulnerability management
- Attack surface reduction
- Next-gen protection
- EDR
- Auto investigation
- Microsoft Threat Experts
- Threat analytics
- Secure score
What people use each for
The jobs each tool is most often brought in to do.
ESLint
- Statically analysing JavaScript and JSX to find problems before runtimenot Microsoft Defender for Endpoint
- Automatically fixing issues with syntax-aware rewritesnot Microsoft Defender for Endpoint
- Enforcing a consistent code style across a teamnot Microsoft Defender for Endpoint
- Running as a CI step to block non-conforming codenot Microsoft Defender for Endpoint
- Writing custom rules for project-specific conventionsnot Microsoft Defender for Endpoint
Microsoft Defender for Endpoint
- Enterprise endpoint security across Windows, macOS, Linux, Android, and iOS via Plans 1 or 2not ESLint
- Small and medium-sized businesses using Microsoft Defender for Business as alternativenot ESLint
- Organisations using Microsoft 365 E5 which includes Defender for Endpoint Plan 2not ESLint
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
ESLint
- Slow performance on large codebases compared to newer tools like Oxlint and Biome
- Complexity in configuration from scratch, particularly for TypeScript support
- Limited built-in TypeScript support, requiring separate parsers and coordination with new TypeScript features
Microsoft Defender for Endpoint
- Pricing not published on public websites; quote required from Microsoft sales
- Defender for Endpoint Plan 1 and Plan 2 do not include server licenses; additional licensing required for server protection
- Specific feature differences between Plan 1 and Plan 2 require consulting Microsoft documentation
Pricing, plan by plan
ESLint
FreeNo published plan breakdown. See the ESLint review.
Microsoft Defender for Endpoint
On requestNo published plan breakdown. See the Microsoft Defender for Endpoint review.
Which should you pick?
Choose ESLint if
- You want to start without paying.
- You work on Browser-based JavaScript, Node.js, Any JavaScript environment.
Choose Microsoft Defender for Endpoint if
- You need threat & vulnerability management.
- You work on Windows, macOS, Linux, iOS, Android.
- You also want attack surface reduction.
Questions people ask
- Is ESLint or Microsoft Defender for Endpoint better?
- Neither clearly leads. ESLint starts at Free and Microsoft Defender for Endpoint at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ESLint or Microsoft Defender for Endpoint?
- ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and On request for Microsoft Defender for Endpoint.
- Does ESLint or Microsoft Defender for Endpoint run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Microsoft Defender for Endpoint runs on Windows, macOS, Linux, iOS, Android.
- Can I use ESLint for free?
- Yes. ESLint has a free tier, so you can try it without paying. Microsoft Defender for Endpoint starts at On request.
- What is ESLint best used for?
- ESLint is most often used for statically analysing javascript and jsx to find problems before runtime, automatically fixing issues with syntax-aware rewrites, enforcing a consistent code style across a team, running as a ci step to block non-conforming code. Of those, statically analysing javascript and jsx to find problems before runtime and automatically fixing issues with syntax-aware rewrites are not what Microsoft Defender for Endpoint is typically brought in for.
- What can ESLint do that Microsoft Defender for Endpoint cannot?
- Microsoft Defender for Endpoint covers Threat & vulnerability management, Attack surface reduction, Next-gen protection, EDR.
Answered from the vendors’ own pages
ESLint: Does ESLint automatically fix code issues?
Many problems ESLint finds can be automatically fixed via the --fix flag. ESLint fixes are syntax-aware so you won't experience errors introduced by traditional find-and-replace algorithms.
SourceMicrosoft Defender for Endpoint: How is Microsoft Defender for Endpoint priced?
Defender for Endpoint is bundled into Microsoft 365 enterprise subscriptions. Plan 1 is included in Microsoft 365 E3, and Plan 2 is included in Microsoft 365 E5. Individual pricing is not published separately.
SourceESLint: How much does ESLint cost?
ESLint is completely free and open-source software maintained by the OpenJS Foundation. The project accepts voluntary donations from sponsors.
SourceMicrosoft Defender for Endpoint: Does Microsoft Defender for Endpoint offer a trial?
Yes. A free trial is available for prospective customers to test the product before committing to a subscription.
SourceESLint: Can I write custom ESLint rules?
Yes. You can develop custom rules that work alongside built-in functionality through ESLint's plugin system, allowing complete customization for your project needs.
SourceMicrosoft Defender for Endpoint: What is the difference between Plan 1 and Plan 2?
Plan 1 (in E3) includes unified security tools, device controls, network protection, firewall, web/URL controls, APIs, SIEM connectors, and app controls. Plan 2 (in E5) adds endpoint detection and response, deception techniques, automatic attack disruption, exposure management, and threat intelligence.
SourceRelated pages
More on Microsoft Defender for Endpoint
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