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esbuild vs Grammarly

esbuild logo

esbuild

Web Development

Extremely fast JavaScript bundler written in Go

From
Free
Rated
-
Full reviewWebsite
Grammarly logo

Grammarly

Documentation

Great writing, simplified

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: esbuild deliberately does not type-check TypeScript, only strips types, so tsc still runs separately; Grammarly occasional false positives and grammatically incorrect suggestions that can introduce errors
  • They diverge on capability: esbuild covers Very fast builds, Grammarly covers Grammar checking.

Where they differ

Only the attributes on which esbuild and Grammarly actually diverge.

Attributes where esbuild and Grammarly differ
AttributeesbuildGrammarly
Pricing modelOpen source, no licence feeUnknown
PlatformsLinux, macOS, WindowsWeb, macOS, Windows, iOS, Android
CategoryWeb DevelopmentDocumentation
FoundedUnknown2009

Identical on both: starting price (Free), free tier (Yes), 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 esbuild

  • Very fast builds
  • TypeScript support
  • Tree shaking and minification
  • Simple API

Only in Grammarly

  • Grammar checking
  • Spelling correction
  • Punctuation
  • Clarity suggestions
  • Engagement feedback
  • Delivery insights
  • Plagiarism checker
  • Citation generator

What people use each for

The jobs each tool is most often brought in to do.

esbuild

  • Build pipelines where bundle time is the bottlenecknot Grammarly
  • Libraries and tools needing a fast, embeddable bundlernot Grammarly
  • Replacing slower bundlers where the plugin ecosystem is not needednot Grammarly

Grammarly

  • Email writingnot esbuild
  • Document editingnot esbuild
  • Academic writingnot esbuild
  • Business communicationnot esbuild
  • Content creationnot esbuild

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

esbuild

  • Deliberately does not type-check TypeScript, only strips types, so tsc still runs separately
  • Plugin API is far narrower than webpack or Rollup, and complex builds hit its limits
  • Code splitting support has historically lagged the more established bundlers
  • Frequently used indirectly through Vite, so direct use is a narrower need than the download numbers suggest

Grammarly

  • Occasional false positives and grammatically incorrect suggestions that can introduce errors
  • Privacy concerns about sending text to Grammarly's servers for analysis
  • AI capabilities sometimes produce hallucinations and fabricated citations that appear grammatically correct

Pricing, plan by plan

esbuild

Free
  • esbuildFree
    • Full functionality
    • Commercial use permitted
    • Community support

Grammarly

Free
  • FreeFree
    • Basic grammar and spelling checks
    • Tone visibility
    • 100 AI prompts per month
  • Pro$12/month
    • Sentence rewrites
    • Tone adjustment
    • Plagiarism and AI detection

Which should you pick?

Choose esbuild if

  • You need very fast builds.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want typescript support.
esbuild review

Choose Grammarly if

  • You need grammar checking.
  • You want to start without paying.
  • You work on Web, macOS, Windows, iOS, Android.
  • You also want spelling correction.
Grammarly review

Questions people ask

Is esbuild or Grammarly better?
Neither clearly leads. esbuild starts at Free and Grammarly at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, esbuild or Grammarly?
esbuild starts at Free and Grammarly at Free.
Does esbuild or Grammarly run on more platforms?
esbuild runs on Linux, macOS, Windows. Grammarly runs on Web, macOS, Windows, iOS, Android.
Can I use esbuild for free?
Both have a free tier, so you can try either at no cost before committing.
What is esbuild best used for?
esbuild is most often used for build pipelines where bundle time is the bottleneck, libraries and tools needing a fast, embeddable bundler, replacing slower bundlers where the plugin ecosystem is not needed. Of those, build pipelines where bundle time is the bottleneck and libraries and tools needing a fast, embeddable bundler are not what Grammarly is typically brought in for.
What can esbuild do that Grammarly cannot?
esbuild covers Very fast builds, TypeScript support, Tree shaking and minification, Simple API. Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions.

Answered from the vendors’ own pages

esbuild: Is esbuild free?

Yes, open source under the MIT licence.

Grammarly: Does Grammarly have a free version?

Yes, Grammarly offers a free tier with basic spelling, grammar, and punctuation checks, tone visibility, and 100 AI prompts per month. The Pro plan ($12/month annual) adds sentence rewriting, plagiarism detection, and 2,000 AI prompts.

Source
esbuild: Does esbuild type-check TypeScript?

No. It strips types for speed and does not check them. Run tsc separately if you need type checking.

Grammarly: What platforms does Grammarly work with?

Grammarly works across 1 million+ apps including Google Docs, Microsoft Word, Outlook, Slack, Gmail, and web browsers. It also integrates with productivity tools like Asana, Jira, Monday.com, Confluence, and HubSpot.

Source
esbuild: Do I need esbuild if I use Vite?

You already have it. Vite uses esbuild internally for dependency pre-bundling and transforms.

Grammarly: Can I use Grammarly offline?

Grammarly requires an internet connection to function, though the browser extension works with some offline text areas. For offline use, the desktop app and browser extensions sync when reconnected.

Source
Grammarly: What is included in the Enterprise plan?

The Enterprise plan includes unlimited team members, dedicated support, custom roles and permissions, data loss prevention, bring-your-own-key encryption, and unlimited AI prompts. Pricing is custom and available by contacting sales.

Source
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