Microsoft Defender
Free baseline
No-cost Windows protection
N/Pub
Included with Windows (verify edition)
Price pending
Not an affiliate product
Price captures verified 2026-08-09; overall scores unpublished
Free vs Paid Antivirus
Free baseline first, pay for leftover jobs: SecurityChecklist starts most careful Windows households on Microsoft Defender (included with supported editions, no affiliate deal), then considers paid tools only for a named leftover. Bitdefender is the pack paid shortlist (Antivirus Plus from $24.99/yr first-year US capture, 2026-08-09; Total Security from $59.99/yr). Malwarebytes Free may help with on-demand scans (Premium from $59.99/yr Standard if you upgrade). No fabricated detection rates or scare pricing. Who should not buy: anyone with free baselines still broken, anyone buying from fear copy alone, anyone stacking two always-on engines, or anyone waiting on a published detection rate before deciding.
Direct verdict
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 pack 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
N/Pub
From $24.99/yr Antivirus Plus (1 device, first year)
Price verified
Verified 2026-08-09, bitdefender.json#bitdefender-starting-price; Total Security Individual from $59.99/yr; renewals may differ
Decision support
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 no /go/microsoft-defender path in this pack. 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 pack paid paths via /go/bitdefender 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.
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.
Defender is a product, not a placeholder
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.
Final verdict (claim-safe)
Free baseline first. Pay for Bitdefender or Malwarebytes only when a leftover suite or cleanup job remains. Overall score remains unpublished (N/Pub). Commissions never invent a free-tier loss.
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
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 /go/bitdefender
Overall score / detection rate
Microsoft Defender: Not yet published, see verification register
Bitdefender: Not yet published, see verification register
How Microsoft Defender and Bitdefender compare
Bars stay empty and winners stay pending until scores are verified.
Microsoft Defender
N/Pub
Malware protection
Winner pending
Requires verified lab or test evidence; no invented detection rates.
Bitdefender
N/Pub
Microsoft Defender
N/Pub
Value vs free DIY
Winner pending
Paid earns a seat only after Defender/updates/backups.
Bitdefender
N/Pub
Microsoft Defender
N/Pub
Features
Winner pending
Suite extras and multi-device seats are the usual paid differentiators.
Bitdefender
N/Pub
Microsoft Defender
N/Pub
Performance
Winner pending
No fabricated FPS or CPU impact numbers.
Bitdefender
N/Pub
Pricing comparison
Ledger-verified starting prices show below when captured; otherwise cards stay confirm-live or pending. Overall scores stay unpublished (N/Pub). Never invent dollar amounts.
Free baseline
Included with Windows
- Microsoft Defender on supported editions
- Pair with updates and tested backups
- No affiliate CTA
No affiliate deal in this pack
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 /go/bitdefender 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
Who should not buy either product yet
- Built-in protection is disabled
- You are buying only because of fear copy
- You need a published detection rate before deciding
- You plan to stack two always-on engines without a named reason
- You skipped backups and think a paid suite replaces restore testing
Where to go next
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 pack paid path; Malwarebytes is the cleanup-focused alternative. No scored free-vs-paid winner until lab evidence exists.
Sources
- Bitdefender pricing (claim ledger), Verified 2026-08-09 starting_price, data/claim-ledgers/bitdefender.json
- Malwarebytes pricing (claim ledger), Verified 2026-08-09 starting_price, data/claim-ledgers/malwarebytes.json (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/
- Claim ledger (T014), data/claim-ledgers/bitdefender.json + malwarebytes.json, starting prices verified 2026-08-09; lab scores unpublished
FAQ
Frequently asked questions
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.
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/.
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 /go/malwarebytes.
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.
Defender has no deal button. Bitdefender View Deal routes through /go/bitdefender. Commissions never determine whether we recommend staying free.
Update history
Price captures verified 2026-08-09; overall scores unpublished. Re-verify volatile prices and plan names before purchase. Overall scores stay unpublished (N/Pub). This page stays intentionally noindex until research and QA publish gates clear.
Internal links
Continue in this cluster
Hub, tools, and related pages from the inventory. No invented URLs.
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