Microsoft Defender
Free baseline
No-cost Windows protection
Included with Windows (verify edition)
Not an affiliate product
Free vs Paid Antivirus
Keep the free baseline first; pay for leftover jobs with Bitdefender or cleanup tools after hygiene. Published USD pricing; no fabricated detection rates.
Independent methodology
Sources when claims need them
Affiliate disclosure where commercial
Bottom line
Overall pick status
Free baseline first, pay for leftover jobs
Most careful Windows households should prove Defender, updates, and backups first. Upgrade when you need multi-device suite seats, cleanup tools, or extras free baselines do not cover. Bitdefender from $24.99/yr first-year is a paid path; Malwarebytes is the cleanup-focused alternative. No scored free-vs-paid winner until lab evidence exists.
Free remedies before either paid plan
- Enable built-in OS protection and confirm it is not disabled by an expired trial
- Turn on automatic OS updates and confirm your system is not years behind on patches.
- On Windows, verify Microsoft Defender (or your built-in protection) is enabled and not disabled by another tool.
- Enable backups you can actually restore, ransomware resilience starts there.
Bitdefender
Paid suite shortlist
When free is not enough
From $24.99/yr Antivirus Plus (1 device, first year)
Verified 2026-08-09, published product records; Total Security Individual from $59.99/yr; renewals may differ
How to choose
How to choose between these two
Scenario fit only, no fabricated overall scores while evidence is pending.
Free baseline first, pay for leftover jobs
Cross-platform seats, cleanup tools, web shields, or parental extras can justify paid plans after free baselines. A scary ad is not a leftover job.
Product analysis: free Windows baseline
On modern Windows, Microsoft Defender with updates and sensible browsing habits is a complete free path for many people. There is microsoft-defender path in our lineup. Paid tools should earn their seat, not replace a disabled baseline.
Product analysis: paid Bitdefender ladder
Bitdefender Antivirus Plus from $24.99/yr and Total Security from $59.99/yr (2026-08-09 first-year US captures) are paid paths via our Bitdefender deal link after free hygiene. Family $79.99/yr covers 25 devices on the same capture day. Re-check renewal before treating intro stickers as ongoing cost. Vendor trial and money-back terms apply separately from first-year stickers.
Product analysis: paid Malwarebytes cleanup ladder
Malwarebytes Free may cover on-demand cleanup; Windows Individual Standard from $59.99/yr (2026-08-09) is the paid Premium entry capture. Prefer Free first when the leftover is a residual scare after Defender. Do not treat Standard as a second always-on engine beside Bitdefender without a named coexistence plan.
Scenario: one careful Windows PC
If Defender real-time is healthy, updates install, and backups restore, stay free until a leftover job appears. Buying Antivirus Plus for fear copy alone fails the free-first bar.
Scenario: mixed phones and laptops
When seat count and multi-device extras are the leftover job after free baselines, Bitdefender Total Security or Family packaging can fit. Prefer Malwarebytes when the Tuesday job is cleanup after a scare, not suite licensing.
Scenario: expired trial left Defender disabled
Re-enable the free Windows baseline and finish updates before any paid upgrade. Paying while Defender stays off is not a free-vs-paid win; it is a broken baseline.
Scenario forks that change the free-vs-paid answer
Healthy Defender plus MFA and backups: stay free. Multi-device suite leftovers: Bitdefender ladder after free hygiene. Residual scare cleanup: Malwarebytes Free then Standard if needed. Mac-only careful habits: stay on Gatekeeper/XProtect until a named leftover appears. VPN anxiety alone: wrong page; use a privacy-bundle compare.
Defender is a product, not a stopgap
On modern Windows, Microsoft Defender with updates and sensible browsing habits is a complete free path for many people. Paid tools should earn their seat, not replace a disabled baseline.
Paid entry prices are often first-year
Bitdefender Antivirus Plus from $24.99/yr and Total Security from $59.99/yr (2026-08-09) are first-year US captures. Family $79.99/yr covers 25 devices. Re-check renewal before treating intro stickers as ongoing cost.
Cleanup is a different free-vs-paid path
Malwarebytes Free may support on-demand scans; Premium/Standard from $59.99/yr (2026-08-09) is the paid cleanup lane. Do not confuse a second-opinion scanner with a second always-on antivirus.
Mac and Android free baselines differ
macOS Gatekeeper/XProtect habits and Android Play Protect are free starting points. Paid multi-platform suites matter more in mixed homes than on a single carefully managed Mac.
Buyer guide: who should not treat first-year as forever
Skip checkout if you only compared intro stickers, if Defender is still off, if you will not administer seats after month one, or if you need a published detection score before buying. Re-check renewal and device counts same-day.
Scenario: Android-only household after Play Protect
If every personal device is Android with Play Protect on and sideloading is rare, stay free until a named leftover appears. A Windows-first suite sticker is the wrong shopping trip for an Android-only home.
Scenario: free cleaner ad versus paid Premium confusion
A free on-demand cleaner download is not the same leftover job as annual Premium real-time. Finish Defender hygiene first; use Malwarebytes Free-first for residual scare cleanup, and open Bitdefender only when multi-device suite seats remain.
Scenario: paying for unused Mac seats on a Windows-only home
If every personal device is Windows, skip Mac seat packaging and Family badges sold as cross-OS theater. Keep Defender healthy; buy Bitdefender Antivirus Plus only for a named Windows leftover, not unused platform seats.
Scenario forks that change the answer
Defender healthy with updates and backups: stay free. Multi-device suite seats leftover: Bitdefender Antivirus Plus from $24.99/yr or Total Security from $59.99/yr after free hygiene. Residual scare cleanup leftover: Malwarebytes Free-first, then Standard from $59.99/yr. Android-only after Play Protect: stay free until a named leftover. Free cleaner ad vs Premium confusion: do not equate on-demand Free with always-on Premium. Waiting on detection scores: are not published yet.
Final verdict
Free baseline first. Pay for Bitdefender or Malwarebytes only when a leftover suite or cleanup job remains. Overall score is not assigned. Commissions
Who wins for which job?
-
Most people should start
Microsoft Defender
Free baseline with OS updates and backups. Zero subscription.
-
Multi-device paid suite
Bitdefender (qualitative)
Paid upgrade path when seats and suite extras remain after Defender; from $24.99/yr first-year capture.
-
Cleanup / second opinion
Malwarebytes (qualitative)
Free on-demand first when available; Standard from $59.99/yr if Premium features are the named gap.
-
Lowest paid capture (context)
Context only, not a scored winner
Bitdefender Antivirus Plus from $24.99/yr first-year vs Malwarebytes Standard from $59.99/yr. Job fit still wins over sticker sorting.
At a glance
| Feature | Microsoft Defender | Bitdefender |
|---|---|---|
| Cost | Included with Windows (verify edition) | From $24.99/yr Antivirus Plus (1 device, first year) |
| Higher paid SKUs | N/A (built-in) | Total Security from $59.99/yr; Family $79.99/yr |
| Best for (qualitative) | No-cost Windows protection | Multi-device paid suite after free baselines |
| Affiliate CTA | None | Via our Bitdefender deal link |
| Overall score / detection rate | Not yet published, | Not yet published, |
-
Cost
Microsoft Defender: Included with Windows (verify edition)
Bitdefender: From $24.99/yr Antivirus Plus (1 device, first year)
-
Higher paid SKUs
Microsoft Defender: N/A (built-in)
Bitdefender: Total Security from $59.99/yr; Family $79.99/yr
-
Best for (qualitative)
Microsoft Defender: No-cost Windows protection
Bitdefender: Multi-device paid suite after free baselines
-
Affiliate CTA
Microsoft Defender: None
Bitdefender: Via our Bitdefender deal link
-
Overall score / detection rate
Microsoft Defender: Not yet published,
Bitdefender: Not yet published,
How Microsoft Defender and Bitdefender compare
Bars stay empty and winners stay pending until scores are verified.
-
Microsoft Defender
See review
Malware protection
Winner pending
Requires verified lab or test evidence; no invented detection rates.
Bitdefender
See review
-
Microsoft Defender
See review
Value vs free DIY
Winner pending
Paid earns a seat only after Defender/updates/backups.
Bitdefender
See review
-
Microsoft Defender
See review
Features
Winner pending
Suite extras and multi-device seats are the usual paid differentiators.
Bitdefender
See review
-
Microsoft Defender
See review
Performance
Winner pending
No fabricated FPS or CPU impact numbers.
Bitdefender
See review
Pricing comparison
Free baseline
Included with Windows
- Microsoft Defender on supported editions
- Pair with updates and tested backups
- No affiliate CTA
No affiliate deal on this page
Paid shortlist (Bitdefender)
From $24.99/yr first year
- Antivirus Plus 1 device first-year US capture
- Total Security from $59.99/yr; Family $79.99/yr
- Affiliate CTA via our Bitdefender deal link after free baselines
Choose Microsoft Defender if
- You want to avoid subscriptions
- Your risk profile is careful, patched, and backed up
Choose Bitdefender if
- You need multi-device paid features after free basics
- You want suite extras with a tracked deal path
Where to go next
Sources
- Bitdefender pricing (sources): Verified 2026-08-09 starting price, published pricing record
- Malwarebytes pricing (sources): Verified 2026-08-09 starting price, published pricing record (Premium context)
- Microsoft Defender: Built-in Windows protection; comparison-only, no affiliate merchant
- Vendor marketing pages: bitdefender.com / malwarebytes.com feature and pricing claims, not independent lab evidence
- Security Checklist methodology: How antivirus pages are structured before scores and detection rates publish, /methodology/
- Sources: published pricing record + published pricing record, starting prices verified 2026-08-09; lab
FAQ
Frequently asked questions
Is paid antivirus worth it?
Only when you have a specific job free tools do not cover: multi-device seats, cleanup workflows, or suite extras you will use. We do not use scare tactics or fake stats. Bitdefender Antivirus Plus from $24.99/yr first-year was captured 2026-08-09.
Is Microsoft Defender enough?
For many careful Windows users with updates, MFA, and backups, yes. Revisit paid options when a leftover multi-device or cleanup job appears. See /antivirus/is-microsoft-defender-enough/.
What about free Malwarebytes?
A free Malwarebytes tier may help with on-demand scans; verify current limits before relying on them. Paid Windows Individual Standard from $59.99/yr (2026-08-09) is the Premium lane via our Malwarebytes deal link.
Who should not buy a paid product yet?
Do not pay while free baselines are broken, while backups are untested, or while you only want a published detection rate that we have not verified.
How do affiliate links work on free-vs-paid pages?
Defender has no deal button. Bitdefender View Deal routes through our tracked Bitdefender deal link. Commissions never determine whether we recommend staying free.
Update history
Price captures verified 2026-08-09. Re-verify volatile prices and plan names before purchase.
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About this page
Free antivirus baseline first, then pay only for leftover jobs: Microsoft Defender versus Bitdefender after hygiene. No fabricated detection rates.
Corrections
Commercial disclosure
Some product links may be commercial. Affiliate relationships never set rankings. See the affiliate disclosure.