Research-led UK buying guide — checked 7 October 2026: Small-business cybersecurity works as a stack rather than one magic product. The Tools and Tech has not hands-on tested every service below. We compared current vendor features, published pricing, deployment scope and how each tool maps to practical controls such as endpoint protection, credential security, secure access and recoverable backups.
Quick answer
For a typical UK small business, start with Microsoft Defender for Business for endpoint protection if you are not already receiving it through Microsoft 365 Business Premium, Bitwarden Teams for shared credentials and password/passkey management, Cloudflare Zero Trust when you need centrally managed private access or web/DNS controls, and Backblaze Business Backup for independent endpoint backup. Add passkeys/FIDO2 and MFA across critical accounts. These tools cover different risks; backup is not antivirus, a password manager is not endpoint detection, and a VPN/Zero Trust service does not replace patching.
At a glance
| Tool | Best for | Current reference price | Key strength | Main caveat |
|---|---|---|---|---|
| Microsoft Defender for Business | Endpoint security | £2.30/user/month, annual billing, VAT extra | EDR, vulnerability management and automated remediation | Already included in Microsoft 365 Business Premium |
| Bitwarden Teams | Credential sharing | US$4/user/month, billed annually | Managed vaults, event logs, directory sync and SCIM | Does not replace MFA or endpoint protection |
| Cloudflare Zero Trust | Private access and web/DNS controls | Free under 50 users; pay-as-you-go $7/user/month | ZTNA and secure-web controls in one platform | Needs thoughtful policy and network configuration |
| Backblaze Business Backup | Endpoint data recovery | US$99/year per computer | Unlimited backup per computer and central management | Not a full server/SaaS disaster-recovery strategy |
Best endpoint-security starting point: Microsoft Defender for Business
Microsoft Defender for Business is designed for organisations with up to 300 users and supports Windows, macOS, iOS and Android endpoints. Microsoft currently lists it at £2.30 per user per month when paid yearly, excluding VAT. Features include next-generation antivirus, endpoint detection and response, vulnerability management, attack-surface reduction, automated investigation/remediation and security reporting.
The most important buying check is whether you already own it. Microsoft 365 Business Premium includes Defender for Business alongside Defender for Office 365 Plan 1, Intune Plan 1 and Entra ID Plan 1. Microsoft currently lists Business Premium at £16.90 per user per month on annual billing, excluding VAT. If your business already pays for Business Premium, buying standalone Defender for the same users would normally duplicate part of what you already license.
Best for: Microsoft-centric small businesses that need managed endpoint protection without moving straight to a larger enterprise security suite.
Best credential-management layer: Bitwarden Teams
Bitwarden Teams is currently US$4 per user per month billed annually. It includes secure credential sharing, organisation collections, event/audit logs, directory synchronisation and SCIM provisioning. That makes it more suitable for a business than passing passwords through chat, spreadsheets or a shared browser profile.
A password manager also remains useful during the transition to passkeys because many services still require passwords or keep them as a fallback. For a fuller comparison, see our Best Business Password Manager UK guide and our Passkeys vs Passwords vs MFA for Business guide.
Best for: teams that need controlled sharing, onboarding/offboarding and visibility over business credentials.
Best secure-access/web-control option: Cloudflare Zero Trust
Cloudflare’s current Zero Trust pricing offers a free plan aimed at teams under 50 users and a pay-as-you-go tier at $7 per user per month. Depending on the plan and configuration, the platform can provide Zero Trust Network Access, DNS/web filtering, secure web gateway controls and other workspace-security functions.
This category becomes useful when a business needs to replace exposed remote-access services, control access to internal applications or apply consistent web/DNS policies to remote staff. It is not automatically necessary for every five-person office, and deployment should follow an actual access requirement rather than buying Zero Trust because the term is fashionable.
Best for: distributed teams and businesses exposing private applications to staff or contractors.
Best simple endpoint-backup layer: Backblaze Business Backup
Backblaze currently lists Business Backup at US$99 per year per computer. It provides unlimited backup per device, automatic Mac and PC protection, central business management and one-year version history on the standard business tier.
Backup belongs in a cybersecurity stack because ransomware, accidental deletion and device loss can all become business-continuity incidents. But backup is not malware protection. It should be deployed alongside endpoint security, strong authentication and a recovery process. For the wider architecture, see our Small-Business Backup & Disaster Recovery Checklist.
Best for: small teams that want simple off-device protection for employee laptops/desktops without managing storage capacity per computer.
Do you need all four?
Not necessarily. The correct stack depends on what you already own and where your data lives.
- Microsoft 365 Business Premium user: check the Defender, Entra and Intune capabilities you already pay for before adding overlapping tools.
- Google Workspace business: you may still want an independent endpoint-security product, password manager and backup layer depending on device ownership and risk.
- Very small office with no internal applications: Cloudflare Zero Trust may be unnecessary initially; strong endpoint protection, MFA/passkeys, patching and backup usually deserve attention first.
- Remote-first business: central identity, secure private access and managed endpoints become more important.
The controls that software cannot buy for you
Cybersecurity tools only work when the basics are managed. Keep operating systems and applications updated, remove unused accounts, restrict administrator privileges, protect important accounts with phishing-resistant authentication, maintain supported routers/firewalls and test backups. Our Cyber Essentials for Small Business guide covers the UK’s core control framework, while How to Secure a Small-Business Wi-Fi Network covers the network layer.
How to choose without wasting money
- Inventory what you already license. Microsoft 365 and other business suites often include security capabilities that smaller companies never enable.
- Map the real risks. Endpoints, email, cloud accounts, shared passwords, remote access and data recovery are different problems.
- Prioritise identity and endpoints. MFA/passkeys, patching and endpoint protection usually come before niche monitoring tools.
- Plan recovery. Decide how the business restores data after a lost laptop, malicious encryption or cloud-account problem.
- Centralise ownership. Someone should know which console manages which control, who receives alerts and what happens when an employee leaves.
- Review annually. Products, licences and built-in platform security change; remove overlapping subscriptions when the same control is already provided elsewhere.
How we researched this guide
We checked current official Microsoft Defender for Business and Microsoft 365 Business Premium pricing/features, Bitwarden business pricing, Cloudflare Zero Trust pricing and Backblaze Business Backup pricing. We evaluated the tools by the security function they perform rather than inventing a single benchmark score across unrelated product categories.
Primary sources
- Microsoft Defender for Business
- Bitwarden Business pricing
- Cloudflare Zero Trust pricing
- Backblaze Business Backup
Frequently asked questions
Is Microsoft Defender enough for a small business?
It can provide a strong endpoint-security layer, especially when combined with Business Premium’s identity, email and device-management controls, but a complete security programme still needs good authentication, updates, recovery, network security and staff processes.
Do we still need a password manager if we use passkeys?
Usually yes during the transition. Many services still use passwords or keep a password fallback, and teams still need controlled ways to share non-personal credentials and manage recovery information.
Does cloud backup stop ransomware?
No. Backup reduces the business impact by providing recoverable copies. Endpoint protection and strong access controls aim to prevent or contain the attack; backup helps you recover afterwards.
Should a five-person company buy Zero Trust?
Only when there is a real requirement. If the team needs private access to internal applications or wants managed DNS/web controls across remote devices, it can be useful. If not, spend effort first on endpoint security, MFA/passkeys, updates and backup.
Final verdict
Build a small-business security stack by function, not by brand count. Defender for Business is a strong endpoint starting point, Bitwarden Teams solves managed credential sharing, Cloudflare Zero Trust addresses controlled private/web access, and Backblaze offers a straightforward endpoint backup layer. Check what your existing licences already include before buying anything twice.
