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Top 12 Best Antivirus Software for Small Business in 2025

Top 12 Best Antivirus Software for Small Business in 2025

Choosing the right cyber-security protection is one of the most critical decisions for any UK small business. The digital landscape is fraught with threats, from ransomware that can halt your operations to data breaches that can ruin your reputation and lead to significant regulatory fines. This guide cuts through the marketing noise to provide a clear, practical comparison of the best antivirus software for small business users in the UK. We analyse key features, deployment practicalities, and UK-specific considerations to help you make an informed choice.

For instance, a local law firm in Dorset needs robust data encryption and ransomware rollback to protect confidential client case files, whereas a marketing agency in Hampshire might prioritise lightweight agents that do not slow down creative workstations. We will explore these real-world scenarios to ensure you select a solution that genuinely fits your operational needs and budget. This article will break down leading platforms, including Microsoft Defender, Bitdefender, and Sophos, with direct links and screenshots to simplify your evaluation.

Remember, antivirus is a critical component, but a layered defence is always stronger. To truly safeguard your small business, it is important to consider a holistic approach to protection, exploring various essential security solutions for businesses beyond just endpoint protection. Let’s dive into the detailed comparisons.

1. Microsoft Defender for Business

For small to medium-sized businesses already embedded within the Microsoft ecosystem, Microsoft Defender for Business presents a compelling, integrated security solution. It moves beyond traditional antivirus, offering enterprise-grade endpoint detection and response (EDR) and threat and vulnerability management, all simplified for organisations with up to 300 users. Its primary strength lies in its seamless unification with Microsoft 365 Business Premium, providing a single-pane-of-glass management experience through the Microsoft 365 Defender portal. This tight integration simplifies deployment and ongoing administration, a significant advantage for SMEs without dedicated IT security staff.

The platform offers robust, next-generation protection that analyses behaviour to stop threats, rather than relying solely on signature-based detection. A key benefit is its automated investigation and remediation capabilities, which can automatically contain and resolve threats, reducing the burden on your team. This proactive approach is a cornerstone of a modern cybersecurity strategy. You can learn more about how this fits into a broader defence plan by reading this guide on cybersecurity for small businesses.

Practical Use Case & Limitations

A small architectural practice in Dorset, for instance, using Microsoft 365 for email and file storage could deploy Defender for Business to secure all endpoints—from office desktops to remote laptops. The vulnerability management feature would highlight which devices are missing critical software patches, allowing for swift action to maintain compliance and security against exploits targeting design software.

However, while support for macOS, iOS, and Android is available, the feature set is most comprehensive and powerful on Windows devices. Furthermore, protection for servers requires an additional licence, which is a crucial consideration for businesses with on-premises or hybrid infrastructures.

2. Bitdefender GravityZone Small Business Security

Bitdefender consistently earns top marks from independent testing labs, and its GravityZone Small Business Security package channels this award-winning protection into a solution designed specifically for SMEs. It offers robust, multi-layered endpoint security, leveraging machine learning and behavioural analysis to stay ahead of emerging threats. The platform is managed via a centralised cloud console, simplifying the deployment and administration of security policies across all devices, a key consideration for businesses without a large IT department.

Bitdefender Gravityzone Small Business Security

This focus on layered defence makes it one of the best antivirus software for small business choices, providing strong ransomware mitigation that can even roll back malicious file changes. The simple, seat-based online licensing model is straightforward to purchase and scale, and importantly, it includes protection for some servers right out of the box, which is a significant value-add for many small businesses.

Practical Use Case & Limitations

A financial advisory firm in Somerset, for example, could use GravityZone to secure sensitive client data on both office PCs and the mobile devices used by their advisers. The centralised console would allow them to enforce security policies and monitor threats from one location, ensuring compliance with data protection regulations. The ransomware rollback feature provides a critical safety net against attacks that could otherwise halt operations and lock access to client portfolios.

However, while the core product is comprehensive, advanced features like full disk encryption and patch management are sold as separate add-on modules, which can increase the total cost. The administrative interface, while powerful, may also present a steeper learning curve for business owners with minimal technical expertise compared to some more simplified competitors.

3. ESET PROTECT Entry

ESET has long been recognised for its high-performance, low-impact security solutions, and ESET PROTECT Entry continues this legacy. It offers a strong foundation of multilayered endpoint protection for businesses that need reliable security without slowing down their systems. Its key differentiator is the flexibility it provides, offering both a cloud-based and an on-premises management console. This choice makes it a versatile option for various IT environments, from cloud-first startups to businesses with established server infrastructures.

The solution provides robust protection against ransomware and fileless attacks across Windows, macOS, and Linux endpoints. One of its main attractions for small businesses is its lightweight agent, which minimises system resource usage, ensuring that even older hardware can run smoothly without performance degradation. This focus on efficiency makes it a strong contender for the best antivirus software for small business environments where every resource counts. The management console gives a clear, centralised view of all protected devices, simplifying security administration.

Practical Use Case & Limitations

Consider a small engineering consultancy in Somerset with a mix of high-performance office PCs running CAD software and older machines for administrative tasks. ESET's lightweight agent would secure these critical endpoints without impacting their performance. The business could opt for the on-premises console to keep all management data within their own network, aligning with specific operational policies or client requirements.

However, the Entry tier is focused purely on endpoint protection. Advanced security features like cloud sandboxing, email security, and full disk encryption are reserved for higher-tier packages like ESET PROTECT Advanced or Complete. Furthermore, while the on-premises console offers greater control, it also introduces the responsibility of server maintenance and updates for the IT team.

  • Best for: Businesses needing a lightweight, high-performance solution with flexible management options.
  • Key Feature: Choice of cloud or on-premises management console with low system-impact agents.
  • Pricing: Available via UK resellers with flexible licensing for a specific number of devices.
  • Website: https://www.comms-express.com/products/eset-epeop-protect-entry-on-prem/

4. Sophos Intercept X

Sophos Intercept X offers a formidable layer of security that goes well beyond conventional antivirus, focusing heavily on preventing the techniques used by attackers. Its strength is its deep learning AI, which excels at detecting both known and unknown malware without relying on signatures. Managed through the Sophos Central cloud-based console, it provides a centralised command centre for managing endpoint security, which is ideal for businesses with limited IT resources but a need for robust protection. This approach is a core element of a layered security posture.

The platform is renowned for its anti-exploit and anti-ransomware technology, including the CryptoGuard feature that can roll back unauthorised file encryption, saving a business from catastrophic data loss. This emphasis on proactive prevention makes it some of the best antivirus software for small business owners concerned about emerging threats. Reinforcing this technology with staff education is also vital; you can explore this further in our guide to IT security awareness training.

Practical Use Case & Limitations

A recruitment agency in Somerset, responsible for a large database of candidate CVs and personal data, could use Sophos Central to deploy and manage Intercept X on all staff devices. If a user accidentally clicks a malicious link in an email, the anti-exploit technology would block the attack chain before ransomware could execute, and the central dashboard would immediately alert the administrator, protecting sensitive personal information from being compromised.

However, the most powerful features, such as extended detection and response (XDR) for threat hunting, are often part of higher-tier packages or add-ons. Pricing can also vary as it is primarily sold through a UK partner network, requiring engagement with a reseller to get a precise quote.

5. Trend Micro Worry-Free Services

For businesses seeking streamlined procurement and billing, Trend Micro Worry-Free Services, offered via Vodafone Business, provides a simplified approach to security. This cloud-managed endpoint suite is tailored for SMBs that prefer consolidating services with a major UK telecoms provider. It combines robust endpoint and mobile device protection with a centralised management console, making it one of the best antivirus software for small business choices for those prioritising operational simplicity.

Trend Micro Worry-Free Services

The platform supports a wide array of operating systems including Windows, macOS, Android, and even Chromebooks, ensuring comprehensive coverage across diverse device environments. With optional upgrades for advanced email security and extended detection and response (XDR), the service can scale alongside your business needs. This structure allows organisations to start with essential protection and add more sophisticated security layers as they grow, all managed under a single, predictable billing model.

Practical Use Case & Limitations

A firm of chartered surveyors in Somerset could use Trend Micro Worry-Free to secure its fleet of staff mobile devices and office PCs. The simple per-user monthly billing through their existing Vodafone Business account would simplify their administrative overhead, allowing them to focus on service delivery. The cloud console enables their IT contact to deploy protection and monitor threats across all devices remotely, including tablets used for on-site inspections.

The primary limitation is that the service must be procured and managed through Vodafone, which may not suit businesses that prefer a direct relationship with the software vendor. Additionally, it is crucial to carefully evaluate the different service tiers (Standard, Advanced, XDR) as the feature set varies significantly between them.

6. Avast Business Security

Avast Business Security provides a scalable endpoint protection solution that caters to the diverse needs of small businesses, from sole traders to growing enterprises. Its strength lies in a tiered plan structure, allowing organisations to select a package that precisely matches their security requirements and budget. Management is centralised through the online Business Hub portal, which simplifies the deployment, monitoring, and management of devices across the company, regardless of their location. This makes it a strong contender for the title of best antivirus software for small business.

Avast Business Security

The platform delivers robust next-generation antivirus and ransomware protection as a standard feature. For businesses seeking more comprehensive security, higher-tier plans add crucial tools like patch management to automate software updates and a VPN for securing data on public Wi-Fi. The generous 30-day free trial and money-back guarantee offer a risk-free opportunity to evaluate its suitability.

Practical Use Case & Limitations

A management consultancy based in Wiltshire with consultants visiting clients at their offices could use the Business Hub to manage the security of company-issued laptops remotely. The optional VPN feature would be particularly beneficial, encrypting sensitive client data when consultants connect to various public or client Wi-Fi networks, helping to maintain data protection compliance and client confidentiality.

However, the tiered model means essential features like patch management are locked behind more expensive plans, which might be a drawback for small businesses on a tighter budget. The final cost can also vary based on the precise number of users and devices, requiring careful calculation before committing.

  • Best for: Businesses wanting a scalable solution with a risk-free trial period.
  • Key Feature: Tiered plans allowing for customisable levels of security.
  • Pricing: Varies by plan (Essential, Premium, Ultimate) and number of devices.
  • Website: https://www.avast.com/en-gb/business/products/small-business

7. WithSecure Elements Endpoint Protection

WithSecure Elements Endpoint Protection offers a highly modular and scalable security solution, making it an excellent choice for small businesses that anticipate growth. Originating from the well-regarded F-Secure, this platform provides cloud-managed endpoint protection that uses advanced behavioural and reputation analysis to counter threats. A key differentiator is its clear, UK-focused online storefront, which simplifies the procurement process for businesses wanting transparent pricing and local support.

Withsecure Elements Endpoint Protection

The platform's strength lies in its à la carte approach. You can start with foundational endpoint protection for computers and servers and later bolt on more advanced services like Endpoint Detection and Response (EDR) or Vulnerability Management as your security needs mature. This flexibility makes it one of the best antivirus software for a small business that prefers to pay only for the specific capabilities it requires at any given time, avoiding the cost of a fully bundled suite.

Practical Use Case & Limitations

A public relations firm in Hampshire could use WithSecure to protect a mix of office desktops and on-premise servers holding sensitive client campaign data. They could start with the core Endpoint Protection product and, as they expand and face stricter compliance demands from larger clients, easily add the Vulnerability Management module to proactively identify and patch software weaknesses across their network.

However, this modularity means that achieving a comprehensive security posture requires purchasing multiple add-ons, which can complicate budgeting. While the core protection is robust, essential features like EDR are not included in the standard package, making it less of an all-in-one solution out of the box compared to some competitors.

  • Best for: Growing businesses wanting a modular security solution with transparent UK pricing.
  • Key Feature: Scalable, à la carte security modules (EDR, Vulnerability Management).
  • Pricing: Varies based on device type (computer vs server), volume, and chosen modules.
  • Website: https://withsecure.store/epp

8. Webroot Business Endpoint Protection

Webroot Business Endpoint Protection champions a different approach, prioritising speed and minimal system impact above all else. Its core strength lies in its exceptionally lightweight agent, which installs in seconds and uses a fraction of the system resources typical of other antivirus solutions. This is achieved by offloading the heavy analysis to a cloud-based intelligence network, making it an excellent choice for micro-businesses or organisations with older hardware that cannot afford performance degradation.

Webroot Business Endpoint Protection

The platform is managed via a simple, web-based console that makes deployment and monitoring straightforward, even for non-technical users. For businesses in Dorset or Hampshire that outsource their IT to a Managed Service Provider (MSP), Webroot is a popular choice due to its deep integrations with Remote Monitoring and Management (RMM) tools. This allows a third-party IT partner to manage security efficiently across multiple clients from a single, unified dashboard.

Practical Use Case & Limitations

Consider a small estate agent in Wiltshire with a handful of employees using a mix of office PCs and laptops. They could deploy Webroot to secure their devices without any noticeable slowdown, ensuring that resource-intensive property management software continues to run smoothly. The management would likely be handled by their local IT support company through their RMM platform.

However, its focus on being lightweight means its feature set is primarily centred on core antivirus and anti-malware protection. It lacks the integrated email security, advanced threat hunting, or XDR capabilities found in more comprehensive suites. Additionally, while historically well-regarded, community sentiment on its effectiveness has become more mixed in recent years.

9. Malwarebytes for Teams

For micro-businesses and small teams, Malwarebytes for Teams offers a straightforward, effective approach to malware protection. It is renowned for its exceptional cleanup capabilities, making it a strong choice for organisations that prioritise simplicity and potent threat removal over a complex, feature-rich suite. Designed for up to 20 devices, it provides core antivirus, anti-malware, and brute-force protection without the administrative overhead of more comprehensive enterprise solutions, making it one of the best antivirus software for small business teams who need to get secured quickly.

Its main appeal lies in its ease of use. The central admin portal allows a business owner or office manager to easily deploy licences and monitor device status across Windows, macOS, iOS, and Android platforms. This simplicity is invaluable for businesses without dedicated IT personnel. Should a device become compromised, Malwarebytes is particularly adept at remediation, and you can find further guidance on what to do by reading about the steps to take after a cyber attack.

Malwarebytes For Teams

Practical Use Case & Limitations

A small creative agency in Hampshire with a mix of Mac and Windows machines could use Malwarebytes for Teams to quickly secure all its devices. The simple licensing and management portal would mean minimal time is spent on setup, allowing the team to focus on client work while being protected from common online threats.

However, the solution's strength is also its limitation. It lacks the advanced endpoint detection and response (EDR) features found in more sophisticated platforms and does not support Windows Server operating systems. This makes it unsuitable for businesses with on-premises servers or those requiring deeper threat analysis and automated response capabilities.

  • Best for: Very small businesses or teams (under 20 users) needing simple, effective malware protection.
  • Key Feature: Strong reputation for system cleanup and straightforward device management.
  • Pricing: Tiered subscription model based on the number of devices.
  • Website: https://www.malwarebytes.com/teams

10. Currys Business – Internet & Security Software

For small businesses in the UK that prefer procuring software alongside hardware and office equipment, Currys Business offers a straightforward and familiar retail channel. Rather than being a software developer, it acts as a trusted reseller for major security brands like ESET, Norton, and McAfee, providing a convenient one-stop-shop experience. This approach simplifies purchasing for businesses needing to acquire laptops, peripherals, and security licenses in a single transaction, streamlining their procurement process. The platform is especially useful for companies that value business-specific payment options like BACS or leasing arrangements.

Currys Business – Internet &Amp; Security Software

This retailer model provides a practical way for UK firms to find some of the best antivirus software for small business needs without managing multiple vendor accounts. Its key strength is convenience and integration into a broader IT purchasing cycle, backed by a well-known UK brand.

Practical Use Case & Limitations

A law firm in Hampshire setting up a new small office could use Currys Business to order new desktop PCs, monitors, and simultaneously purchase a multi-device ESET business security licence pack. This consolidates their initial IT setup into one order with a single invoice, simplifying their accounting and supplier management from day one.

However, as a general retailer, Currys Business does not offer the specialised technical support or deep product expertise found with dedicated cybersecurity providers. Product selection can fluctuate based on stock, and businesses should verify whether licences are delivered physically or as digital downloads, as this can vary.

11. Amazon UK – Antivirus & Security

For businesses seeking flexibility and potentially lower initial costs, online marketplaces like Amazon UK can be a viable route for procuring security software. Rather than a single solution, Amazon offers a vast selection of antivirus keys and subscriptions from numerous brands, often at competitive prices due to third-party seller competition. Its primary strength lies in convenience and speed, allowing a business to purchase and receive a digital licence key via email, often within minutes, for immediate deployment on a handful of machines.

Amazon Uk – Antivirus &Amp; Security

The platform’s familiarity and Amazon Business accounts streamline the purchasing process for VAT-registered companies. However, this approach is fundamentally different from a direct subscription with a provider. It puts the onus on the buyer to ensure they are purchasing the correct business-grade product, not a consumer version, and to verify the legitimacy of the seller. While it offers a wide array of options, it lacks the centralised management and direct support inherent in dedicated business antivirus software platforms.

Practical Use Case & Limitations

A small marketing agency in Hampshire needing to secure three new laptops quickly could use Amazon to purchase a multi-device licence for a known brand like Norton or McAfee. They could benefit from a first-year discount and have the software installed and running the same day, without needing to set up a new account directly with the software vendor.

However, this approach is less suitable for scaling. There is no central dashboard for managing licences, monitoring threats, or enforcing security policies across the organisation. Furthermore, support queries would likely be directed through Amazon or the seller first, potentially adding a layer of complexity compared to dealing directly with the antivirus provider’s dedicated business support team.

12. Capterra UK – Antivirus Software Directory

While not a direct software provider, Capterra’s UK directory is an indispensable research tool for any small business selecting an antivirus solution. It aggregates hundreds of software options, allowing you to compare features, pricing models, and, most importantly, authentic user reviews side-by-side. This platform provides a broad, unbiased market overview that extends far beyond the well-known brands, helping you discover niche solutions that might be a better fit for your specific operational needs. For businesses evaluating the best antivirus software for small business, it serves as a critical first step in the decision-making process.

The platform's strength lies in its powerful filtering and comparison tools. You can narrow down choices based on essential criteria like endpoint detection and response (EDR) capabilities, mobile device management, or compatibility with specific operating systems. This granular approach saves significant time and helps ensure that the products you shortlist genuinely meet your technical and compliance requirements before you ever engage with a vendor.

Practical Use Case & Limitations

A law firm in Wiltshire, needing to find an antivirus solution that is both compliant with Solicitors Regulation Authority (SRA) guidelines and easy for non-technical staff to manage, could use Capterra’s filters to identify suitable options. By reading reviews from other legal practices, they can gain valuable insight into real-world performance and support quality, validating their choice before committing to a purchase.

However, it is crucial to be aware that Capterra features sponsored listings, which can influence visibility, so due diligence is still required. The platform is a research aggregator, not a reseller; all purchases must be completed directly through the vendor’s website, adding an extra step to the procurement process.

  • Best for: Businesses conducting initial market research and comparing a wide range of antivirus solutions.
  • Key Feature: Extensive user reviews and granular filtering for feature-specific comparisons.
  • Pricing: Free to use for research and comparison.
  • Website: https://www.capterra.co.uk/directory/30228/anti-virus/software

Top 12 Small Business Antivirus Comparison

Solution / Vendor Core Features User Experience / Quality Value Proposition Target Audience Price & Licensing
Microsoft Defender for Business NGAV, EDR, multi-OS, vulnerability management Integrated with Microsoft 365, good portal Enterprise-grade security simplified for SMBs SMBs using Microsoft 365 Per-user licensing, server add-on extra
Bitdefender GravityZone Small Business Multi-layered protection, ransomware rollback, cloud console High independent test scores, scalable Strong security with flexible add-ons Small businesses Seat-based licensing, some modules extra
ESET PROTECT Entry Multi-OS support, cloud/on-premises management Lightweight agents, flexible licensing Lightweight with flexible deployment SMBs needing low impact Licensing via UK resellers
Sophos Intercept X Anti-exploit, ransomware rollback, cloud management Easy cloud management, UK partner support Advanced protection with add-on options SMBs via partners Variable pricing, add-ons required
Trend Micro Worry-Free Services Endpoint & email protection, XDR optional Simple monthly billing via Vodafone Telco-backed with clear pricing SMBs wanting telco support Per-user pricing, tiered plans
Avast Business Security NGAV, ransomware protection, VPN and patch options Tiered plans, free trial Flexible plans for varied SMB sizes Micro to larger SMBs Tiered plans, VAT and device count affect
WithSecure Elements Endpoint Protection Cloud-managed endpoint, server SKUs, volume discounts UK pricing clear, Nordic vendor reputation Scalable modular security solutions SMBs with mixed endpoint needs Price varies by device and features
Webroot Business Endpoint Protection Cloud intelligence, lightweight agent, RMM/PSA integrations Simple cloud console, very light client Minimal impact and MSP-friendly Micro-businesses & MSPs Subscription-based
Malwarebytes for Teams AV & anti-malware, tamper protection, multi-OS Simple onboarding, strong cleanup reputation Easy small team protection Very small teams Tiered packages, limited server support
Currys Business – Internet & Security Business invoicing, wide antivirus range, free delivery Trusted UK retailer, convenient procurement One-stop shop for UK SMB IT needs UK SMBs Variable, based on product
Amazon UK – Antivirus & Security Wide brand selection, digital delivery, Amazon Business Fast fulfillment, competitive pricing Quick purchase with buyer protections General SMBs Varies, seller dependent
Capterra UK – Antivirus Software Directory User reviews, feature filters, vendor links Broad overview, reputation check Helps shortlist and research antivirus options SMB decision makers Free directory, no sales

Making the Final Decision: A Strategic Approach

Navigating the crowded marketplace to find the best antivirus software for your small business can feel overwhelming, but a structured approach simplifies the process immensely. We have analysed a range of solutions, from the deeply integrated Microsoft Defender for Business to the powerful, AI-driven threat hunting of Sophos Intercept X and the straightforward, effective protection of ESET PROTECT Entry. Your final choice should not be based solely on a feature list, but on a strategic evaluation of your unique business environment.

Aligning Protection with Your Business Needs

The core takeaway is that the "best" solution is entirely contextual. A legal practice in Somerset handling sensitive client case files has stringent SRA compliance needs that might favour a solution with advanced data loss prevention features. In contrast, an accountancy firm in Dorset might prioritise robust ransomware protection and endpoint detection and response (EDR) to safeguard critical financial records.

Before you make a final commitment, consider these crucial factors:

  • In-house IT Resources: Do you have a dedicated IT specialist or team? If not, a solution with a simple, cloud-based management console like Trend Micro Worry-Free Services or a fully managed service is far more practical than a complex, on-premise system.
  • Operational Impact: How will the software affect your daily operations? A crucial step is to utilise the free trials offered by most vendors. Deploy the trial on a representative sample of your devices to check for any performance slowdown on the specific applications your team uses every day.
  • Scalability: Consider your five-year business plan. Will your chosen antivirus solution grow with you? Look for providers that offer easy scalability, allowing you to add users and upgrade protection tiers without a complete system overhaul.

From Analysis to Implementation

Making an informed decision involves more than just reading reviews; it requires a deep dive into how each product fits within the broader market. A crucial part of this process involves conducting a thorough competitor landscape analysis of the available antivirus solutions to understand their market positioning, strengths, and weaknesses relative to your specific requirements. This helps you see beyond the marketing and identify true value.

Once you have selected a provider, the implementation phase is critical. A poorly configured antivirus solution is little better than having none at all. Ensure you have a clear deployment plan, understand the policy settings, and schedule regular reviews to adapt to new threats. For many small businesses in Hampshire and Wiltshire, outsourcing this entire lifecycle management offers the most robust security posture. A managed service provider can handle the selection, deployment, ongoing monitoring, and incident response, freeing you to focus on your core business. By carefully matching the software's capabilities to your operational realities and support structure, you can implement a cyber-defence that is not just a utility, but a genuine business enabler.

Feeling confident in your cybersecurity shouldn't be a luxury. If you need expert guidance to select, deploy, and manage the right antivirus solution for your business, contact the specialists at SES Computers. We provide tailored, managed security services to ensure your business remains protected, compliant, and focused on growth.