Bitdefender vs Avast in 2026: Which to Trust?

By NorwegianSpark Editorial · Published September 6, 2026 — written with AI assistance and reviewed by the NorwegianSpark SA editorial team.

If you are comparing Bitdefender and Avast on which one catches more malware, the honest answer is that the independent labs cannot separate them, and you should stop reading reviews that pretend otherwise.

Two results, both read directly from the testing organisations on 6 September 2026. AV-TEST's June 2026 round for home Windows products scored Bitdefender Total Security 27.0 at 6/6/6 across protection, performance and usability — and scored Avast Free Antivirus 26.4 and 26.5 at 6/6/6 as well. Both carry AV-TEST's "Top product" designation. AV-Comparatives' Real-World Protection Test covering February to May 2026 ran 400 test cases: Bitdefender blocked 398, a 99.5% protection rate; Avast blocked 397, 99.3%. Both recorded a false-positive score of 5, and both were awarded ADVANCED+.

One test case in four hundred. That is the entire detection gap, and it is well inside the noise of which samples happened to be in that month's set. Anybody telling you Bitdefender "catches significantly more" is describing a difference that the measurements do not support.

So the decision has to be made on something else. There are three things worth deciding on, and they are not the ones the comparison sites lead with.

The free tier question, corrected

The line repeated across most comparison articles is that Avast is freemium and Bitdefender is paid-only. That is wrong, and it is easy to check.

Bitdefender's own site advertises Bitdefender Antivirus Free, described there as "totally free, no hidden costs, no trials required" with "permanent access" and "no validity due date". Its own comparison table lists what the free product is: "Windows only" with "Basic ransomware protection", and explicitly without anti-tracking, without social network protection, without full-system analysis and without the productivity and entertainment modes.

Avast's free product is the one AV-TEST scored at 6/6/6, which tells you something useful in itself: a free tier from a major vendor is running the same detection engine as the paid one. That is generally true across this category, and it is why "free antivirus is fake protection" is bad advice.

What both free tiers leave out is the same list: the anti-phishing depth, the ransomware rollback, the firewall controls, the VPN, the password manager, the banking browser. If your risk is malware, free is genuinely close to paid. If your risk is scams and account takeover — which for most people it now is — the gap is real and it is in the paid tier. That trade-off is the whole of our free vs paid antivirus guide.

The trust question, which is where these two actually differ

This is the part that belongs in a comparison headed "which to trust", and it is a matter of public record rather than opinion.

On 22 February 2024 the United States Federal Trade Commission announced an order against Avast. The FTC's statement, quoted verbatim from its own press release: Avast "unfairly collected consumers' browsing information through the company's browser extensions and antivirus software, stored it indefinitely, and sold it without adequate notice and without consumer consent". The FTC further stated that Avast "deceived users by claiming that the software would protect consumers' privacy by blocking third party tracking, but failed to adequately inform consumers that it would sell their detailed, re-identifiable browsing data". The company paid 16.5 million dollars and the order bars it from selling or licensing browsing data from its branded products to third parties for advertising purposes.

Three things follow from that, and all three matter.

First, it happened, and no amount of current marketing erases it. Second, the conduct is now prohibited by an enforceable order rather than by a promise — which is arguably a stronger guarantee than a competitor's unaudited privacy policy. Third, and most importantly for a buying decision: the product's detection was never what was in question, which is consistent with the lab scores above.

Whether that history disqualifies Avast for you is a judgement, not a technical fact, and it is a legitimate one either way. Some people will not put a company with that record on their machine. Others will note that a court-enforced order is a more concrete commitment than most vendors have ever made. We are not going to tell you which of those you should be. Our fuller writeup is the Avast One review.

Bitdefender has no comparable enforcement history. Our Bitdefender review covers what it is like to actually live with.

Side by side, on the things that are actually different

We deliberately do not put prices in that table. Both vendors change plan names, tiers and promotional pricing several times a year, and a price written here in September is a fabrication by December. Read it on the vendor's own page at the moment you buy: Bitdefender and Avast One.

How to actually decide

• If you want free and you are on Windows only, either works. Avast's free tier is the more feature-complete of the two, and it is the one with a current 6/6/6.
• If the FTC order is a dealbreaker for you, that settles it, and you do not owe anyone a longer justification.
• If you are buying paid, decide on the feature gating rather than the engine. Check which tier includes the VPN with real data, whether ransomware rollback is on by default, and whether parental controls need a family plan. Those differences are larger than any detection difference.
• If you are protecting a household, count the devices and the platforms first. Cross-platform coverage and a single management dashboard change the day-to-day experience far more than one test case in four hundred.
• If you are on a Mac, most of this comparison does not apply — see best antivirus for Mac and do Macs need antivirus.

The counter-argument, stated properly

Here is the case against agonising over this choice at all.

Both of these products scored full marks in the same month. The realistic difference in your risk between running one or the other is very close to zero. Meanwhile, the controls that would actually change your outcome — a unique password on every account, a password manager to make that possible, two-factor authentication or passkeys, and keeping your operating system patched — cost nothing and are still not done on most machines.

If you have an hour to spend on security this week, spending it on those four will do more than any amount of comparing two products that a testing lab could not separate. If you have already done them, then by all means pick on the trust question and the feature gating, which is what this page is for.

For the wider field, our best antivirus roundup covers the general question, and the antivirus buying guide covers what the feature names actually mean.

Lab scores separate the top tier from the rest. They do not separate these two from each other. Decide on trust history, free-tier scope and feature gating instead. This is general guidance, not security advice for a specific threat model.

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