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Browser Extensions · head to head

ProWritingAid vs uBlock Origin

ProWritingAid logo

ProWritingAid

Browser Extensions

AI writing assistant and grammar checker

From
Free
Rated
-
Full reviewWebsite
uBlock Origin logo

uBlock Origin

Browser Extensions

Free, open-source ad content blocker

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: ProWritingAid free plan limited to 500 word count with only 2 report runs per day; uBlock Origin cNAME uncloaking of third-party trackers disguised as first-party is only available on Firefox, because the required DNS API does not exist in Chromium
  • They diverge on capability: ProWritingAid covers Grammar checking, uBlock Origin covers Ad blocking.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which ProWritingAid and uBlock Origin actually diverge.

Attributes where ProWritingAid and uBlock Origin differ
AttributeProWritingAiduBlock Origin
Pricing modelfreemiumfree
PlatformsWeb, Windows, Mac, Chrome, Firefox, EdgeChrome, Firefox, Edge, Opera
Founded20132014

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

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 ProWritingAid

  • Grammar checking
  • Style analysis
  • Readability reports
  • Plagiarism checker
  • Safari support

Only in uBlock Origin

  • Ad blocking
  • Tracker blocking
  • Malware domain blocking
  • Custom filter lists
  • Opera support

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

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

ProWritingAid

  • Grammar and style checking for writers and authorsnot uBlock Origin
  • Story planning and structure analysisnot uBlock Origin
  • Character and manuscript analysis for fiction writersnot uBlock Origin
  • Integration with Microsoft Word, Google Docs, Scrivener, and Notionnot uBlock Origin

uBlock Origin

  • Ad and tracker blocking in web browsersnot ProWritingAid
  • Privacy protection while browsing the webnot ProWritingAid
  • Reducing bandwidth usage by blocking adsnot ProWritingAid
  • Users seeking open-source browser extensionsnot ProWritingAid

Where each one falls short

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

ProWritingAid

  • Free plan limited to 500 word count with only 2 report runs per day
  • Advanced AI features (50 Sparks per day, Chapter Critiques) only in Premium Pro tier
  • Desktop apps for Mac and Windows; iOS/Android support limited to specific integrations
  • Yearly subscriptions significantly more cost-effective than monthly (67% savings)

uBlock Origin

  • CNAME uncloaking of third-party trackers disguised as first-party is only available on Firefox, because the required DNS API does not exist in Chromium
  • HTML filtering of response bodies requires the webRequest.filterResponseData API, which is only available in Firefox
  • On Chromium-based browsers uBO is not reliably ready at browser launch, so tracker and advertisement payloads can reach already-open tabs before filtering starts
  • Pre-fetch blocking is not reliable on Chromium-based browsers because they give websites precedence over user settings
  • The Chromium build does not use the WebAssembly filtering code paths, because the extra manifest permission would create friction publishing to the Chrome Web Store
  • LZ4 storage compression is Firefox only, and on Chromium in incognito mode IndexedDB resets, so uBO launches with out-of-date filter lists

Pricing, plan by plan

ProWritingAid

Free
  • FreeFree
    • Basic grammar and spelling checks
    • 500-word limit per check
    • 2 report runs daily
  • Premium$30/month
    • Unlimited word count
    • Unlimited rephrases
    • 5 Sparks daily
  • Premium Pro$36/month
    • All Premium features
    • 50 Sparks daily
    • 3 Chapter Critiques daily

uBlock Origin

Free
  • FreeFree
    • Ad blocking
    • Tracker blocking
    • Custom filter lists

Which should you pick?

Choose ProWritingAid if

  • You need grammar checking.
  • You want to start without paying.
  • You work on Web, Windows, Mac, Chrome, Firefox, Edge.
  • You also want style analysis.
ProWritingAid review

Choose uBlock Origin if

  • You need ad blocking.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Opera.
  • You also want tracker blocking.
uBlock Origin review

Questions people ask

Is ProWritingAid or uBlock Origin better?
Neither clearly leads. ProWritingAid starts at Free and uBlock Origin at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ProWritingAid or uBlock Origin?
ProWritingAid starts at Free and uBlock Origin at Free.
Does ProWritingAid or uBlock Origin run on more platforms?
ProWritingAid runs on Web, Windows, Mac, Chrome, Firefox, Edge. uBlock Origin runs on Chrome, Firefox, Edge, Opera.
Can I use ProWritingAid for free?
Both have a free tier, so you can try either at no cost before committing.
What is ProWritingAid best used for?
ProWritingAid is most often used for grammar and style checking for writers and authors, story planning and structure analysis, character and manuscript analysis for fiction writers, integration with microsoft word, google docs, scrivener, and notion. Of those, grammar and style checking for writers and authors and story planning and structure analysis are not what uBlock Origin is typically brought in for.
What can ProWritingAid do that uBlock Origin cannot?
ProWritingAid covers Grammar checking, Style analysis, Readability reports, Plagiarism checker. uBlock Origin covers Ad blocking, Tracker blocking, Malware domain blocking, Custom filter lists. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

ProWritingAid: How much does ProWritingAid cost?

ProWritingAid is free. Premium plan costs $30/month ($120/year), and Premium Pro costs $36/month ($144/year). Both yearly plans offer significant monthly savings. Lifetime options cost $399 (Premium) or $699 (Premium Pro).

Source
uBlock Origin: How much does uBlock Origin cost?

uBlock Origin is completely free and open-source software with no licensing fees, subscriptions, or commercial restrictions.

Source
ProWritingAid: Is there a free version of ProWritingAid?

Yes. The free plan includes basic grammar and spelling checks with a 500-word limit per check, 2 report runs daily, 10 rephrases daily, and 3 Sparks daily.

Source
uBlock Origin: Is uBlock Origin open source?

Yes, uBlock Origin is distributed under the GPL-3.0 License with source code publicly available on GitHub. The project encourages community review and contribution.

Source
ProWritingAid: What is the difference between Premium and Premium Pro?

Premium ($30/month) includes 25+ analysis reports and 1 Chapter Critique daily. Premium Pro ($36/month) adds 50 Sparks daily, 3 Chapter Critiques daily, live workshops, and group critique sessions.

Source
uBlock Origin: Does uBlock Origin accept donations?

No, uBlock Origin explicitly does not accept donations. The project instead encourages users to support the developers maintaining the filter lists that power the extension.

Source
ProWritingAid: Does ProWritingAid offer a refund guarantee?

ProWritingAid offers a 3-day money-back guarantee for yearly and lifetime subscriptions. Monthly plans have no refund option.

Source
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