Developer Tools · head to head
ESLint vs RAD Studio
RAD Studio
Developer Tools
Cross-platform native app development with Delphi and C++Builder
- From
- $2000/perpetual
- Rated
- -
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; RAD Studio professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which ESLint and RAD Studio actually diverge.
| Attribute | ESLint | RAD Studio |
|---|---|---|
| Starting price | Free | $2000/perpetual |
| Pricing model | Unknown | one-time |
| Free tier | Yes | No |
| Platforms | Browser-based JavaScript, Node.js, Any JavaScript environment | Web |
| Founded | 2019 | Unknown |
Identical on both: user rating (Not yet rated), category (Developer Tools).
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 RAD Studio
- Automatically fixing issues with syntax-aware rewritesnot RAD Studio
- Enforcing a consistent code style across a teamnot RAD Studio
- Running as a CI step to block non-conforming codenot RAD Studio
- Writing custom rules for project-specific conventionsnot RAD Studio
RAD Studio
- Building Windows desktop applications with VCL componentsnot ESLint
- Creating iOS and Android apps from shared Delphi codebasenot ESLint
- Connecting to Oracle databases through FireDAC connectivitynot ESLint
- Building REST web services that run on Linux serversnot 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
RAD Studio
- Professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax
- Enterprise edition steps up to $3,400 license plus $1,199 maintenance, and Architect edition to $4,416 license plus $2,183 maintenance
- The perpetual license only entitles the buyer to updates for one year; continued access to new updates and upgrades requires an annually renewable Update Subscription
Pricing, plan by plan
ESLint
FreeNo published plan breakdown. See the ESLint review.
RAD Studio
$2000/perpetual- Professional Edition$2000/perpetual
- Perpetual License
- First year maintenance $599
- Total $2,599 + Tax
- Enterprise Edition$3400/perpetual
- Perpetual License
- First year maintenance $1,199
- Total $4,599 + Tax
- Architect Edition$4416/perpetual
- Perpetual License
- First year maintenance $2,183
- Total $6,599 + Tax
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 RAD Studio if
Nothing in the data separates RAD Studio from ESLint on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is ESLint or RAD Studio better?
- Neither clearly leads. ESLint starts at Free and RAD Studio at $2000/perpetual, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ESLint or RAD Studio?
- ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and $2000/perpetual for RAD Studio.
- Does ESLint or RAD Studio run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. RAD Studio runs on Web.
- Can I use ESLint for free?
- Yes. ESLint has a free tier, so you can try it without paying. RAD Studio starts at $2000/perpetual.
- 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 RAD Studio is typically brought in for.
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.
SourceRAD Studio: How much does RAD Studio cost?
RAD Studio uses perpetual licensing: Professional Edition $2,000 perpetual license + $599 first year maintenance ($2,599 total + tax). Enterprise Edition $3,400 license + $1,199 maintenance ($4,599 total + tax). Architect Edition $4,416 license + $2,183 maintenance ($6,599 total + tax).
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.
SourceRAD Studio: What is the difference between RAD Studio editions?
Professional Edition ($2,599 total + tax) targets individual developers. Enterprise Edition ($4,599 total + tax) adds multi-tier app capabilities. Architect Edition ($6,599 total + tax) includes advanced database and cloud features. All three include perpetual licenses.
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.
SourceRAD Studio: Does RAD Studio offer Kai AI integration and discounts?
Yes, adding Kai AI to any edition provides discounts: 25% off Professional ($2,136 + tax), 30% off Enterprise ($3,394 + tax), and 40% off Architect ($4,109 + tax). This promotion is active through August 31, 2026.
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