Consumer antivirus and business antivirus solve different problems. The consumer version protects one machine and reports to the person sitting at it. Business software protects a fleet and reports to whoever is responsible when something goes wrong — which, in a small company, is usually someone who already has another job.
That difference is the whole buying decision. If you have more than about five machines, running consumer licences means you find out about an infection when an employee mentions their laptop is slow.
Below are ten options that work for small businesses, what each is genuinely good at, and how to choose without paying for an enterprise security operations centre you cannot staff.
What “Business” Antivirus Actually Adds
Three things, and only the first is about detection.
Central management. One console showing every device, its status, and whether it is patched. This is the feature you are actually buying.
Policy enforcement. Users cannot disable protection, skip updates, or ignore warnings. On consumer licences, they can and do.
Endpoint detection and response (EDR). Beyond blocking known malware, EDR records what happened on a machine so you can answer “what did it touch?” after an incident. Most vendors now bundle a light version.
The Ten Worth Considering
1. Microsoft Defender for Business
If you already pay for Microsoft 365 Business Premium, this is included. That fact alone should put it at the top of your list to evaluate, because the marginal cost is zero.
Its documented feature set covers next-generation protection, endpoint detection and response, automated investigation and remediation, and a management console shared with the rest of the Microsoft admin experience. Defender’s detection engine has scored well in independent testing from AV-TEST and AV-Comparatives in recent years.
Suits: anyone already on Microsoft 365 Business Premium. Weakness: management is noticeably better for Windows than Mac.
2. Bitdefender GravityZone Business Security
Consistently among the strongest performers in independent lab testing, with a management console that is genuinely usable by a non-specialist. Documented features include ransomware mitigation, web filtering, device control, and both cloud and on-premise console options.
Suits: mixed Windows/Mac fleets where you want strong detection without a security background. Weakness: the tiering is confusing — read carefully so you buy the right level.
3. ESET PROTECT Entry
ESET’s reputation is built on being light. On older hardware, where heavier agents make machines unusable, this matters more than a marginal detection difference.
Documented features cover endpoint protection for Windows, Mac and Linux, plus a cloud console and optional full-disk encryption at higher tiers.
Suits: businesses with ageing hardware, or anyone who has had users complain that security software slowed their machine. Weakness: the console is functional rather than pleasant.
4. Sophos Intercept X Essentials
Strong anti-ransomware specifically. Sophos’s documented CryptoGuard feature detects the behavioural signature of mass file encryption and rolls affected files back, which is a meaningfully different approach from signature matching.
Suits: businesses where ransomware is the primary fear — professional services, anyone holding client data. Weakness: the full platform is more than most small teams will use.
5. Malwarebytes for Teams / ThreatDown
Malwarebytes built its reputation as the thing you run when something already got through. Its business products carry that remediation strength into a managed offering.
Suits: small teams wanting something simple that cleans up effectively. Weakness: fewer enterprise controls than Bitdefender or Sophos.
6. Avast Business / Norton Small Business
Both are consumer brands with small-business tiers, and both are now part of Gen Digital. They are straightforward to deploy and familiar to non-technical buyers.
One thing to check: Avast’s parent company previously faced regulatory action over the sale of browsing data collected through its free consumer products. That concerned the consumer side rather than the business products, but it is worth reading current privacy terms before committing.
Suits: very small teams wanting a familiar name. Weakness: weaker central management than purpose-built business tools.
7. Trend Micro Worry-Free Services
Explicitly designed for small business, with a console pitched at people who are not security specialists. Documented coverage includes endpoints, email and cloud app protection.
Suits: businesses wanting endpoint and email protection from one vendor.
8. Webroot Business Endpoint Protection
Extremely light agent and fast deployment, using a largely cloud-based detection model. That architecture is the trade-off: it depends on connectivity more than local-signature products.
Suits: distributed teams, low-spec machines.
9. SentinelOne Singularity
A genuine EDR platform rather than antivirus with EDR bolted on. Documented features include behavioural AI detection and one-click rollback of ransomware damage.
Suits: small businesses with a compliance requirement or an IT provider to run it. Weakness: more capability than an unstaffed small business can act on.
10. CrowdStrike Falcon Go
CrowdStrike’s small-business entry point, bringing its detection platform to smaller fleets.
Suits: businesses that need a recognised enterprise name for customer security questionnaires. Weakness: priced accordingly.
One Product to Avoid in the US
Kaspersky products have historically performed very well in independent detection testing. However, in 2024 the US Commerce Department prohibited the sale of Kaspersky software in the United States on national security grounds, and US customers were transitioned to another vendor.
If you operate in the US, Kaspersky is not a viable option regardless of its technical merits. If you operate elsewhere, check your own jurisdiction’s position and any requirements your customers impose.
How They Compare
| Product | Best for | Central console | EDR included |
|---|---|---|---|
| Microsoft Defender for Business | Existing M365 Business Premium | Yes | Yes |
| Bitdefender GravityZone | Detection strength, mixed fleets | Yes | At higher tiers |
| ESET PROTECT Entry | Older hardware | Yes | Add-on |
| Sophos Intercept X | Ransomware defence | Yes | Yes |
| Malwarebytes / ThreatDown | Simplicity, remediation | Yes | At higher tiers |
| Avast / Norton Small Business | Very small teams | Basic | Limited |
| Trend Micro Worry-Free | Endpoint plus email | Yes | At higher tiers |
| Webroot | Light agent, remote teams | Yes | Limited |
| SentinelOne | Compliance requirements | Yes | Core feature |
| CrowdStrike Falcon Go | Enterprise-grade name | Yes | Core feature |
Pricing across this category is per-device per-year, usually with volume tiers and multi-year discounts, and it changes often. Verify current pricing directly with each vendor rather than trusting any figure quoted in an article — including this one, which deliberately quotes none.
How to Choose
Check what you already own first. Microsoft 365 Business Premium includes Defender for Business. Paying separately without checking is the most common waste in this category.
Count your Macs honestly. Several vendors have noticeably weaker Mac management. If a third of your fleet is Mac, test on a Mac during the trial.
Read independent lab results, not vendor claims. AV-TEST and AV-Comparatives publish comparative testing. Vendor pages cite whichever test they won.
Deploy to five machines before buying for fifty. Every vendor offers a trial. Detection is broadly comparable across the top products; deployment friction and console usability are not, and those are what you live with.
Decide who reads the alerts. A console nobody opens provides no protection. If nobody will own it, choose the simplest product, or engage a managed provider.
Common Mistakes to Avoid
- Running consumer licences on business machines. No central visibility, and users can switch protection off.
- Buying EDR you cannot staff. EDR generates alerts that need a human to triage. Unread, it is an expensive log file.
- Forgetting mobile and Mac. Fleets are mixed; licences often are not.
- Treating antivirus as your whole security posture. Most successful attacks on small businesses start with a phishing email or a reused password, not a virus. Endpoint protection is one layer.
- Skipping the backup question. The reliable defence against ransomware is a tested, offline backup. Antivirus reduces the odds; backups determine whether an incident is a bad afternoon or an extinction event.
- Auto-renewing without re-quoting. Renewal pricing in this category is frequently higher than new-customer pricing. Ask.
FAQs
Is Microsoft Defender good enough for a small business?
For many, yes. Defender for Business is a genuine business product with central management and EDR, and Defender’s detection has scored well in recent independent testing. If you already have Microsoft 365 Business Premium, evaluate it before paying for anything else.
How much should small business antivirus cost?
It is priced per device per year with volume and multi-year tiers, and figures change frequently enough that any number quoted here would mislead you. Get quotes from two or three vendors for your actual device count.
Do Macs need antivirus?
Yes, though the threat profile differs. macOS has strong built-in protections, but Mac-targeted malware and adware exist, and in a business context you want the same central visibility across every machine regardless of platform.
What is the difference between antivirus and EDR?
Antivirus blocks known-bad software. EDR records endpoint activity so you can investigate what happened, and often roll it back. Antivirus prevents; EDR explains and remediates. Most business products now include some of both.
Can I use free antivirus for my business?
Most free products licence for personal use only, so business use may breach the terms. You also lose central management entirely, which is the main reason to buy business software at all.
Will antivirus stop ransomware?
It reduces the risk substantially, and products with behavioural anti-ransomware like Sophos CryptoGuard add a real layer. Nothing stops all of it. Tested, offline backups are what determine whether you recover.
Key Takeaways
- Central management, not detection rate, is the main thing business antivirus buys you.
- Check whether Microsoft 365 Business Premium already includes Defender for Business before paying twice.
- Detection is broadly comparable across top products; deployment and console usability differ a lot.
- Kaspersky is prohibited from sale in the US regardless of its technical performance.
- Backups, not antivirus, decide whether a ransomware incident is survivable.
Before You Buy
Count your devices by operating system, check what your existing Microsoft or Google subscription already includes, and name the person who will read the console. Then trial two products on five real machines.
Security software is one layer. Our guides to the best password managers and cloud storage services for small businesses cover the two layers that stop more real-world incidents than antivirus does.