Best Endpoint Security for Small Business
A single infected laptop can take down a small team for days — locked files, a frozen invoicing system, a client who quietly stops replying to emails. Endpoint security is the layer that catches that laptop before it becomes a payroll crisis. We compared three platforms built for businesses without a dedicated security team: Microsoft Defender for Business, Bitdefender GravityZone Business Security and Sophos Intercept X Advanced. None of them need a security analyst on staff to run properly, and each takes a different approach to what ‘protection’ actually means once you look past the marketing page.
Key Takeaways
- Already on Microsoft 365? Microsoft Defender for Business is the easiest sell if you’re on Microsoft 365 Business Premium — it’s often included, not an extra line item.
- Read the tier name carefully Bitdefender GravityZone Business Security covers next-gen antivirus and risk analytics well, but stops short of full EDR.
- Growing team? Sophos Intercept X Advanced adds proper endpoint detection and response, which matters once you have more than a handful of devices to watch.
- No fixed pricing None of these vendors publish a single universal price — device count, contract length and add-ons (EDR, XDR, MDR) all move the number.
- One layer, not the whole stack Endpoint security is not a replacement for backups, MFA or staff training.
Our Top Picks at a Glance
Best Overall: Microsoft Defender for Business
If your business already runs on Microsoft 365, Defender for Business is the obvious starting point — and for a lot of small teams, the decision is already made for them, because it's bundled into Microsoft 365 Business Premium rather than sold as a bolt-on.
Standalone, it's priced at £2.30 per user per month, billed yearly, direct from Microsoft's UK pricing page. That covers next-gen antivirus, attack surface reduction, automated investigation and remediation, and endpoint detection and response across Windows, macOS, iOS and Android. What you don't get at this tier is the deeper hunting and correlation tools that come with Microsoft's enterprise-grade Defender XDR — Defender for Business is deliberately scoped down and simplified for teams without a security operations centre.
The real advantage here isn't a feature list, it's integration. Alerts sit in the same admin centre as your email and device management, so a compromised account and a compromised laptop show up in one place instead of two separate consoles you have to cross-reference by hand. For a five-person agency running entirely on Microsoft 365, that alone can be worth more than a longer feature checklist from a rival product.
Best Value: Bitdefender GravityZone Business Security
Bitdefender's small-business tier is built around prevention rather than investigation, and it's worth being precise about that distinction before buying. GravityZone Business Security bundles next-gen antivirus with risk analytics and patch management, but it sits below the GravityZone Business Security Premium tier that adds full EDR — so if a threat gets past the initial layers, you have less visibility into what it did next.
Bitdefender doesn't publish a flat UK price on its own site — the checkout is built around a device-count and contract-length calculator rather than a static number. Third-party pricing trackers put the entry tier at roughly $77 per device per year (around $6.40 a month), correct at time of publication and worth confirming directly with Bitdefender before you commit, since device tiers and regional pricing shift.
Where GravityZone earns its place on this list is independent lab results — Bitdefender's detection engine consistently scores near the top in AV-Comparatives and AV-TEST business rounds, and that engine is the same one powering the pricier tiers. You're not getting a watered-down detection model at the entry price, just a thinner set of response tools around it. For a business that mainly wants strong prevention and isn't ready to pay for a full EDR workflow, that trade-off is a reasonable one.
Best for Growing Teams: Sophos Intercept X Advanced
Sophos sits a step up from pure antivirus, and it's the pick here for businesses that expect to outgrow "install and forget" protection within a year or two. Intercept X Advanced adds deep learning malware detection, anti-ransomware rollback (it can revert files encrypted mid-attack rather than just blocking the process), and exploit prevention aimed at the techniques that skip past signature-based scanning entirely.
Like Bitdefender, Sophos doesn't list public pricing — it sells through partners and the number depends on device count and term. Trusted third-party pricing guides put Intercept X Advanced at roughly $28 per endpoint annually, with the XDR-enabled tier closer to $48 and managed threat response services running higher again. Treat these as directional rather than a quote — get an actual number from a Sophos partner before budgeting.
The rollback feature is the one worth testing before you buy, not just reading about. In our review of vendor documentation and independent testing summaries, Sophos's CryptoGuard component is one of the more mature anti-ransomware rollback tools on the market — useful specifically because ransomware is the scenario that puts small businesses out of business, not just off work for an afternoon.
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Best overall
Microsoft Defender for Business
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Best value
Bitdefender GravityZone Business Security
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Best for growing teams
Sophos Intercept X Advanced
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|---|---|---|---|
| Starting price | £2.30/user/mo (official) | ~$6.40/device/mo (est.) | ~$28/device/yr (est.) |
| Full EDR included | Yes | No | Yes |
| Ransomware rollback | Limited | No | Yes (CryptoGuard) |
| Best fit | Microsoft 365 users | Tight budget | Scaling teams |
| Platform coverage | Win/mac/iOS/Android | Win/mac/Linux | Win/mac/Linux |
| Check Price | Check Price | Check Price |
How to Choose Endpoint Security for a Small Business
Frequently Asked Questions
Is Microsoft Defender for Business enough on its own?
For most small teams already on Microsoft 365, yes — as long as you also have MFA enforced and a real backup routine. Defender covers the endpoint layer, but it isn’t a substitute for account security or data recovery.
Do I need EDR if I only have 5-10 employees?
Not always. If your risk is mainly opportunistic malware and phishing, prevention-focused tools like Bitdefender’s entry tier are often enough. EDR earns its cost once you’re handling sensitive client data or have seen a near-miss incident already.
Why don't these vendors list a fixed price?
Endpoint security is typically sold per device on annual contracts, with volume discounts and add-ons (EDR, XDR, managed response) changing the total. Vendors quote based on your specific device count rather than publishing one number for every business.
Can I run two of these at once for extra protection?
No — running two real-time antivirus or EDR agents on the same device usually causes conflicts and can actually reduce protection by breaking each tool’s monitoring hooks. Pick one primary endpoint tool per device.
Does endpoint security protect against phishing emails?
Only partially. These tools catch malicious attachments and links once they’re opened, but email-level filtering (built into Microsoft 365 or Google Workspace) is a separate layer that stops more phishing before it reaches an inbox.
Final Verdict
- Already on Microsoft 365 Business Premium: Defender for Business is likely included
- Tight budget, prevention is the priority: Bitdefender GravityZone Business Security
- Ransomware is the main risk you're guarding against: Sophos Intercept X Advanced
For most small businesses already inside the Microsoft ecosystem, Defender for Business is the pragmatic default — it’s often already paid for. If you’re outside that ecosystem and want the strongest pure prevention for the money, Bitdefender’s entry tier is hard to beat on detection scores. If ransomware is your specific worry, Sophos’s rollback capability justifies the step up.
