Is ESLint or KnowBe4 better?

Neither clearly leads. ESLint starts at Free and KnowBe4 at $1/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, ESLint or KnowBe4?

ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and $1/month for KnowBe4.

Does ESLint or KnowBe4 run on more platforms?

ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. KnowBe4 runs on Web, Mobile, Email.

Can I use ESLint for free?

Yes. ESLint has a free tier, so you can try it without paying. KnowBe4 starts at $1/month.

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 KnowBe4 is typically brought in for.

What can ESLint do that KnowBe4 cannot?

KnowBe4 covers Security awareness training, Phishing simulation, Risk assessments, Compliance training.

Developer Tools · head to head

ESLint vs KnowBe4

ESLint

Developer Tools

Find and fix problems in JavaScript code

From: Free
Free plan: Yes

Full review Website

KnowBe4

Cybersecurity

World's largest security awareness training platform

From: $1/month
Free plan: No

Full review Website

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; KnowBe4 published prices assume a three year term, so the quoted per seat rate depends on a long commitment
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which ESLint and KnowBe4 actually diverge.

Attributes where ESLint and KnowBe4 differ
Attribute	ESLint	KnowBe4
Starting price	Free	$1/month
Pricing model	Unknown	subscription
Free tier	Yes	No
Platforms	Browser-based JavaScript, Node.js, Any JavaScript environment	Web, Mobile, Email
Category	Developer Tools	Cybersecurity
Founded	2019	2010

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 KnowBe4 does not also cover.

Only in KnowBe4

Security awareness training
Phishing simulation
Risk assessments
Compliance training
Incident reporting
API access
Custom policies
Behavior analytics

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 KnowBe4
Automatically fixing issues with syntax-aware rewritesnot KnowBe4
Enforcing a consistent code style across a teamnot KnowBe4
Running as a CI step to block non-conforming codenot KnowBe4
Writing custom rules for project-specific conventionsnot KnowBe4

KnowBe4

Security awareness training and simulated phishing for staffnot ESLint
Tracking employee susceptibility to phishing over timenot 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

KnowBe4

Published prices assume a three year term, so the quoted per seat rate depends on a long commitment
Pricing is banded by seat count, and the lowest band of 25 to 50 seats pays the highest rate
Accounts above 1,000 seats have no published price and require a custom quote
Third party integrations, Compliance Plus and PhishER Plus are all separately priced per seat add ons
The Foundation tier carries 200 training modules against more than 1,000 on Advanced, so content volume is the main gate

Pricing, plan by plan

ESLint

Free

No published plan breakdown. See the ESLint review.

KnowBe4

$1/month

Basic$1/month
- Per user
- Training modules
- Phishing templates
Advanced$2/month
- All Basic features
- Advanced phishing
- Risk assessments
Pro$3/month
- All Advanced features
- API access
- Custom content

Which should you pick?

Choose ESLint if

You want to start without paying.
You work on Browser-based JavaScript, Node.js, Any JavaScript environment.

ESLint review

Choose KnowBe4 if

You need security awareness training.
You work on Web, Mobile, Email.
You also want phishing simulation.

KnowBe4 review

Questions people ask

Is ESLint or KnowBe4 better?: Neither clearly leads. ESLint starts at Free and KnowBe4 at $1/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESLint or KnowBe4?: ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and $1/month for KnowBe4.
Does ESLint or KnowBe4 run on more platforms?: ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. KnowBe4 runs on Web, Mobile, Email.
Can I use ESLint for free?: Yes. ESLint has a free tier, so you can try it without paying. KnowBe4 starts at $1/month.
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 KnowBe4 is typically brought in for.
What can ESLint do that KnowBe4 cannot?: KnowBe4 covers Security awareness training, Phishing simulation, Risk assessments, Compliance training.

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.

Source

KnowBe4: What does KnowBe4 cost per employee?

KnowBe4 charges per seat per month on a subscription basis. For 51-100 employees, SAT Foundation costs $2.13/month per seat and SAT Advanced costs $3.40/month per seat. Prices decrease with larger employee counts.

Source

ESLint: 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.

Source

KnowBe4: Does KnowBe4 offer a free trial?

KnowBe4 does not offer a full free version, but free tools are available separately including assessments and simulators.

Source

ESLint: 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.

Source

KnowBe4: Are there add-on costs beyond the base plan?

Yes, optional add-ons include Third-Party Integrations ($1.10-$1.20/seat/month), Compliance Plus ($0.82-$0.93/seat/month), PhishER Plus ($1.15-$1.50/seat/month), and Student Edition ($0.17/seat/month).

Source

KnowBe4: What currencies does KnowBe4 accept?

KnowBe4 accepts pricing in USD, AUD, BRL, CAD, EUR, GBP, SGD, and ZAR.

Source

ESLint vs KnowBe4

ESLint

KnowBe4

The short version

Where they differ

What each one covers

Only in ESLint

Only in KnowBe4

What people use each for

ESLint

KnowBe4

Where each one falls short

ESLint

KnowBe4

Pricing, plan by plan

ESLint

KnowBe4

Which should you pick?

Choose ESLint if

Choose KnowBe4 if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on ESLint

More on KnowBe4

Keep looking

Other head to heads