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Bitdefender Total Security vs Grammarly

Bitdefender Total Security logo

Bitdefender Total Security

Software

The world's #1 rated antivirus

From
$19.99/year
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: Bitdefender Total Security vPN limited to 200MB per day, insufficient for streaming video or extended browsing sessions; Grammarly occasional false positives and grammatically incorrect suggestions that can introduce errors
  • They diverge on capability: Bitdefender Total Security covers Advanced threat defense, Grammarly covers Grammar checking.

Where they differ

Only the attributes on which Bitdefender Total Security and Grammarly actually diverge.

Attributes where Bitdefender Total Security and Grammarly differ
AttributeBitdefender Total SecurityGrammarly
Starting price$19.99/yearFree
Free tierNoYes
PlatformsWindows, macOS, iOS, AndroidWeb, macOS, Windows, iOS, Android
Founded20012009

Identical on both: pricing model (Unknown), 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 Bitdefender Total Security

  • Advanced threat defense
  • Multi-layer ransomware protection
  • Real-time data protection
  • Network threat prevention
  • VPN
  • Parental advisor
  • Anti-tracker
  • Microphone monitor

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.

Bitdefender Total Security

  • Antivirusnot Grammarly
  • Internet Securitynot Grammarly
  • Endpoint Protectionnot Grammarly

Grammarly

  • Email writingnot Bitdefender Total Security
  • Document editingnot Bitdefender Total Security
  • Academic writingnot Bitdefender Total Security
  • Business communicationnot Bitdefender Total Security
  • Content creationnot Bitdefender Total Security

Where each one falls short

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

Bitdefender Total Security

  • VPN limited to 200MB per day, insufficient for streaming video or extended browsing sessions
  • Limited features on Apple devices with iOS version lacking scheduled scans, firewall, file shredder, and other tools
  • Failed to detect 10% of virus samples during in-house testing, falling short of perfect detection rates
  • Auto-renewal billing issues with complaints about unauthorized recurring charges and difficulties with refunds
  • Device optimization tools less extensive than competitors, lacking game booster, driver updater, startup manager, and battery usage manager

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

Bitdefender Total Security

$19.99/year

No published plan breakdown. See the Bitdefender Total Security review.

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 Bitdefender Total Security if

  • You need advanced threat defense.
  • You work on Windows, macOS, iOS, Android.
  • You also want multi-layer ransomware protection.
Bitdefender Total Security 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 Bitdefender Total Security or Grammarly better?
Neither clearly leads. Bitdefender Total Security starts at $19.99/year and Grammarly at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bitdefender Total Security or Grammarly?
Grammarly has a free tier; the other does not. Paid plans start at $19.99/year for Bitdefender Total Security and Free for Grammarly.
Does Bitdefender Total Security or Grammarly run on more platforms?
Bitdefender Total Security runs on Windows, macOS, iOS, Android. 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. Bitdefender Total Security starts at $19.99/year.
What is Bitdefender Total Security best used for?
Bitdefender Total Security is most often used for antivirus, internet security, endpoint protection. Of those, antivirus and internet security are not what Grammarly is typically brought in for.
What can Bitdefender Total Security do that Grammarly cannot?
Bitdefender Total Security covers Advanced threat defense, Multi-layer ransomware protection, Real-time data protection, Network threat prevention. Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions.

Answered from the vendors’ own pages

Bitdefender Total Security: What are Bitdefender's main features?

Total Security includes real-time antivirus, anti-phishing, anti-ransomware, firewall, secure VPN (limited), password manager, file shredder, and anti-tracker. Additional features include parental controls, advanced threat defense, privacy firewall, and webcam/microphone protection.

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
Bitdefender Total Security: What did Bitdefender score on AV-TEST?

Bitdefender scored 6/6 across protection, performance, and usability in the January-February 2026 AV-TEST evaluation, and AV-Comparatives named it Product of the Year with a 99.98% detection rate.

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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