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Acunetix vs Grammarly

Acunetix logo

Acunetix

Software

Web application security testing made easy

From
On request
Rated
-
Full reviewWebsite
Grammarly logo

Grammarly

Software

Great writing, simplified

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Grammarly has a free tier, so it costs nothing to try first.
  • Each has a real cost: Acunetix aWS Marketplace lists Acunetix Online Premium, published by seller Invicti Security, at $7,000 per year for 5 targets under a 12 month contract, where a target is one fully qualified domain, website, web app, API or web service; Grammarly occasional false positives and grammatically incorrect suggestions that can introduce errors
  • They diverge on capability: Acunetix covers DAST scanning, Grammarly covers Grammar checking.

Where they differ

Only the attributes on which Acunetix and Grammarly actually diverge.

Attributes where Acunetix and Grammarly differ
AttributeAcunetixGrammarly
Starting priceOn requestFree
Pricing modelsubscriptionUnknown
Free tierNoYes
PlatformsDesktop, Web, ApiWeb, macOS, Windows, iOS, Android
Founded20052009

Identical on both: user rating (Not yet rated), category (Unknown).

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 Acunetix

  • DAST scanning
  • IAST technology
  • AcuSensor
  • JavaScript security
  • SQL injection testing
  • XSS detection
  • OWASP Top 10
  • API security testing

Only in Grammarly

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

Both cover

  • Slack

What people use each for

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

Acunetix

  • Vulnerability Scannernot Grammarly
  • Web Securitynot Grammarly
  • Dastnot Grammarly

Grammarly

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

Where each one falls short

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

Acunetix

  • AWS Marketplace lists Acunetix Online Premium, published by seller Invicti Security, at $7,000 per year for 5 targets under a 12 month contract, where a target is one fully qualified domain, website, web app, API or web service
  • AWS Marketplace's Invicti listing shows Premium Support priced separately at $150,000 per year and Premium Support with Guided Success at $300,000 per year, on top of the base scanning licence

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

Acunetix

On request
  • StandardFree
    • Single user
    • 5 targets
    • Scheduled scans
  • PremiumFree
    • Multiple users
    • Unlimited targets
    • CI/CD integration
  • Acunetix 360Free
    • Enterprise features
    • SDLC integration
    • Custom workflows

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 Acunetix if

  • You need dast scanning.
  • You work on Desktop, Web, Api.
  • You also want iast technology.
Acunetix 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 Acunetix or Grammarly better?
Neither clearly leads. Acunetix starts at On request and Grammarly at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Acunetix or Grammarly?
Grammarly has a free tier; the other does not. Paid plans start at On request for Acunetix and Free for Grammarly.
Does Acunetix or Grammarly run on more platforms?
Acunetix runs on Desktop, Web, Api. Grammarly runs on Web, macOS, Windows, iOS, Android.
Can I use Grammarly for free?
Yes. Grammarly has a free tier, so you can try it without paying. Acunetix starts at On request.
What is Acunetix best used for?
Acunetix is most often used for vulnerability scanner, web security, dast. Of those, vulnerability scanner and web security are not what Grammarly is typically brought in for.
What can Acunetix do that Grammarly cannot?
Acunetix covers DAST scanning, IAST technology, AcuSensor, JavaScript security. Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions. Both handle Slack.

Answered from the vendors’ own pages

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
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
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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