Software · head to head
Microsoft Defender vs Bitdefender Total Security
Microsoft Defender
Software
Always-on protection for you and your family's data and devices
- From
- On request
- Rated
- -
Bitdefender Total Security
Software
The world's #1 rated antivirus
- From
- $19.99/year
- Rated
- -
The short version
- Each has a real cost: Microsoft Defender the overview page names Business, Business Premium and Enterprise tiers but publishes no per-seat figure on the page itself, routing every plan to a separate pricing page instead; Bitdefender Total Security vPN limited to 200MB per day, insufficient for streaming video or extended browsing sessions
Where they differ
Only the attributes on which Microsoft Defender and Bitdefender Total Security actually diverge.
| Attribute | Microsoft Defender | Bitdefender Total Security |
|---|---|---|
| Starting price | On request | $19.99/year |
| Pricing model | quote | Unknown |
| Platforms | Web | Windows, macOS, iOS, Android |
| Founded | Unknown | 2001 |
Identical on both: free tier (No), 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 Microsoft Defender
Nothing recorded that Bitdefender Total Security does not also cover.
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
What people use each for
The jobs each tool is most often brought in to do.
Microsoft Defender
No use cases recorded yet. See the Microsoft Defender review.
Bitdefender Total Security
- Antivirusnot Microsoft Defender
- Internet Securitynot Microsoft Defender
- Endpoint Protectionnot Microsoft Defender
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Microsoft Defender
- The overview page names Business, Business Premium and Enterprise tiers but publishes no per-seat figure on the page itself, routing every plan to a separate pricing page instead
- Full family and business protection requires a Microsoft 365 Family, Personal or Premium subscription rather than being included with the free built-in Windows version
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
Pricing, plan by plan
Microsoft Defender
On requestNo published plan breakdown. See the Microsoft Defender review.
Bitdefender Total Security
$19.99/yearNo published plan breakdown. See the Bitdefender Total Security review.
Which should you pick?
Choose Microsoft Defender if
Nothing in the data separates Microsoft Defender from Bitdefender Total Security on the points above - pick on price and on how each one feels to use.
Choose Bitdefender Total Security if
- You need advanced threat defense.
- You work on Windows, macOS, iOS, Android.
- You also want multi-layer ransomware protection.
Questions people ask
- Is Microsoft Defender or Bitdefender Total Security better?
- Neither clearly leads. Microsoft Defender starts at On request and Bitdefender Total Security at $19.99/year, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Microsoft Defender or Bitdefender Total Security?
- Microsoft Defender starts at On request and Bitdefender Total Security at $19.99/year.
- Does Microsoft Defender or Bitdefender Total Security run on more platforms?
- Microsoft Defender runs on Web. Bitdefender Total Security runs on Windows, macOS, iOS, Android.
- What can Microsoft Defender do that Bitdefender Total Security cannot?
- Bitdefender Total Security covers Advanced threat defense, Multi-layer ransomware protection, Real-time data protection, Network threat prevention.
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.
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.