SMALL BUSINESS CYBERSECURITY

Best Antivirus for Small Business in 2026

The best antivirus for a small business is not necessarily the product with the longest feature list. The right choice depends on how many devices you protect, who manages security alerts, whether you already use Microsoft 365, and whether you need basic malware prevention, endpoint detection and response, or a managed security team watching your environment.

Quick picks

Those are starting points, not universal rankings. Two businesses with the same number of employees can need very different endpoint-security models. A ten-person accounting office using Microsoft 365 Business Premium may have different requirements from a ten-person manufacturer with shared workstations, servers, specialized software and an outside IT provider.

Antivirus is only one part of endpoint security

The word antivirus is still useful because it is familiar, but modern business endpoint security can extend far beyond scanning files for known malware. When comparing products, it helps to understand four increasingly capable security models.

Antivirus

Traditional antivirus focuses primarily on identifying and blocking malicious software. Modern antivirus engines may also use cloud intelligence, behavioral analysis, reputation systems and other techniques rather than relying only on traditional signatures.

That prevention layer still matters. The limitation is operational: preventing malware is not the same thing as investigating suspicious behavior across multiple computers or responding to a compromised endpoint.

Endpoint protection

An endpoint protection platform can combine antimalware with additional controls such as exploit protection, web protection, attack-surface reduction, device controls, ransomware defenses and centralized policy management.

For a small business, centralized management is particularly important. Installing security software is only the beginning. Someone should be able to determine whether protection is active, definitions and agents are current, policies are applied, detections are being addressed and newly purchased computers are actually enrolled.

EDR

Endpoint detection and response adds deeper visibility into suspicious activity occurring on endpoints. Rather than focusing only on blocking a malicious file, EDR can help security teams investigate behavior, understand what happened and take response actions.

This becomes increasingly useful when an attack does not look like conventional malware. Attackers may abuse legitimate administrative tools, scripts, stolen credentials or software already present on the computer.

MDR

Managed detection and response adds a human service layer. Instead of expecting the small business to watch an EDR console and investigate alerts itself, an MDR provider monitors security signals and helps investigate and respond to threats.

That difference can matter more than another feature on a comparison chart. A sophisticated security platform provides limited value if nobody has time to review its alerts.

1. Microsoft Defender for Business

Best fit to evaluate: small businesses already invested in Microsoft 365, especially organizations using Microsoft 365 Business Premium.

Microsoft Defender for Business is Microsoft's endpoint-security offering designed for small and medium-sized organizations. It builds on Microsoft's broader Defender endpoint technology while packaging capabilities for organizations with up to 300 users.

Defender for Business is available as a standalone subscription and is also included with Microsoft 365 Business Premium. That makes licensing one of the first things a Microsoft-focused small business should investigate before buying another endpoint product.

Why Defender for Business can make sense

If the business already licenses Microsoft 365 Business Premium, purchasing another endpoint-security suite without first evaluating Defender can create unnecessary overlap. Defender for Business provides more than the basic Microsoft Defender Antivirus included with Windows.

Microsoft documents capabilities that include next-generation protection, endpoint detection and response, vulnerability-management functionality and automated security capabilities. The Microsoft security ecosystem can also provide a more unified approach for organizations already managing Microsoft identities, devices and cloud services.

Where small businesses can get into trouble

Having a security product included in a subscription does not automatically mean it is configured, monitored or operating the way the organization expects. Device onboarding, security policies, exclusions, alert handling and ongoing review still require ownership.

This is an important distinction throughout this guide: licensing a security capability is not the same thing as operating a security program.

What about servers?

Do not assume endpoint licensing for employees automatically covers every server. Microsoft has separate Defender for Business server licensing considerations. Businesses with Windows or Linux servers should inventory those systems and confirm the applicable licensing and protection requirements before purchasing.

2. Bitdefender GravityZone

Best fit to evaluate: businesses that want dedicated business endpoint protection with centralized administration and do not necessarily want their endpoint-security strategy tied primarily to Microsoft licensing.

Bitdefender's GravityZone family provides business endpoint-security products with multiple editions and optional capabilities. Its direct GravityZone Business Security offering supports small deployments and provides a central management console for protected devices.

Why GravityZone is attractive to SMBs

A dedicated business-security console can be easier to reason about than a collection of individually managed antivirus installations. Administrators can gain a central view of protected endpoints and apply security controls consistently.

Bitdefender lists modern endpoint protection, Network Attack Defense and risk-management capabilities in GravityZone Business Security. Higher editions and add-ons expand the available security functionality.

Pay attention to the edition

This is one area where buyers should slow down. GravityZone is a product family, not one identical feature set. Bitdefender's own documentation notes that feature availability depends on the GravityZone edition and license.

Do not compare a feature listed for a premium, enterprise, EDR or MDR tier with the price of an entry-level package and assume they are the same product.

Who should shortlist it?

GravityZone is particularly worth investigating when a business wants centrally managed endpoint security across a fleet of computers and prefers a dedicated security platform. It can also make sense when an MSP or IT provider already knows and manages the GravityZone environment.

3. Sophos endpoint security and MDR

Best fit to evaluate: businesses that want a business-focused endpoint platform with room to move toward broader detection and managed response.

Sophos approaches endpoint security as part of a larger security platform. Organizations can use endpoint protection while also evaluating extended detection and response and managed detection and response services.

Why the service model matters

The interesting question with Sophos is not simply whether its endpoint agent can stop malware. It is whether the business wants to operate endpoint security internally or have outside security professionals help monitor and respond.

For organizations with an IT generalist rather than a dedicated security operations team, that distinction deserves serious consideration.

Endpoint security versus MDR

Endpoint protection provides technology the organization can administer. MDR adds an ongoing managed security operation around detection and response. Businesses comparing Sophos plans should therefore determine which responsibilities remain with their own staff and which responsibilities are handled by the service.

This is also why headline subscription prices do not tell the whole story. The cost of a security tool should be considered alongside the internal time and expertise required to operate it.

4. Malwarebytes Teams

Best fit to evaluate: very small businesses with 20 or fewer devices that want straightforward business security without the administrative complexity of a full EDR or MDR platform.

Malwarebytes Teams is designed for sole proprietors, boutique businesses and small offices. It combines malware protection with business-oriented features such as device alerts, monthly reporting, tamper protection and priority support while keeping administration relatively straightforward for organizations without dedicated security staff.

Why Teams fits very small businesses

The appeal of Malwarebytes Teams is its narrower scope. A small company may need dependable protection across employee computers and mobile devices without needing an advanced detection-and-response console that someone must continuously monitor. Teams supports Windows, macOS, Android and iOS, although available features vary by operating system.

That makes it worth considering when simplicity and a small device footprint matter more than operating a broader enterprise endpoint-security stack.

See Malwarebytes Teams plans

Know the 20-device limit

Malwarebytes Teams is intended for deployments of up to 20 devices and does not support server operating systems. Businesses that need server protection, a larger endpoint deployment, or more advanced EDR and MDR capabilities should evaluate a broader business endpoint-security platform instead.

Do not confuse Malwarebytes Teams with ThreatDown, Malwarebytes' broader business-security platform. They serve different operational needs, and the Teams product is the relevant option in this antivirus comparison.

When should a small business consider managed EDR or MDR?

A small company does not need a large internal security department to benefit from advanced detection. But it does need someone responsible for responding when a security product raises an important alert.

Managed EDR or MDR becomes especially relevant when the business has no dedicated security staff, relies on a small IT team, operates outside normal business hours, handles sensitive information, has cyber-insurance or contractual security obligations, or simply cannot commit to monitoring endpoint alerts consistently.

Huntress as an example of the managed model

Huntress illustrates this model well. Its Managed EDR service combines endpoint detection with continuous monitoring and response from a security operations team. Huntress can also manage Microsoft Defender Antivirus alongside its Managed EDR service and integrate with Microsoft Defender for Business or Defender for Endpoint.

That makes Huntress fundamentally different from purchasing a basic antivirus license. The value proposition is not merely another malware scanner; it is adding people and operational response around endpoint detection.

That does not automatically make MDR necessary for every small business. It does mean that businesses should compare who responds, not just what detects.

Is Microsoft Defender Antivirus enough for a small business?

Sometimes the answer may be yes for a very small, low-complexity environment—but the question needs to be more specific.

Microsoft Defender Antivirus is built into supported Windows environments and provides a legitimate antimalware layer. A business should not assume that a free built-in product is inherently inadequate simply because another vendor sells antivirus software.

But basic antivirus alone does not solve every endpoint-security requirement. The business still needs to think about centralized management, policy enforcement, visibility across devices, EDR, vulnerability management, response capabilities and who investigates suspicious activity.

A useful question is therefore:

Those are not the same purchasing decision.

Microsoft Defender Antivirus vs. Defender for Business

The names can be confusing.

Microsoft Defender Antivirus is the antimalware technology built into Windows. Microsoft Defender for Business is a broader business endpoint-security solution that adds business-oriented management and endpoint detection and response capabilities.

That distinction is particularly important when reading product comparisons. Saying that a company “uses Defender” does not tell you which Microsoft security capabilities are actually licensed, configured and monitored.

What features should a small business look for?

Centralized management

A business should be able to see its protected devices from a central location. Look for visibility into device health, policy status, detections and protection state.

Centralized management becomes more valuable as the number of computers grows or employees work remotely.

Ransomware protection

Ransomware defense should include more than recognizing one known ransomware executable. Modern endpoint products may combine behavioral detection, exploit protection, attack-surface controls and other techniques intended to disrupt malicious activity.

Endpoint protection should also be paired with a strong small-business backup strategy. Antivirus is not a replacement for recoverable backups.

Endpoint detection and response

EDR becomes more important when the organization needs visibility into suspicious behavior rather than only malware prevention. Ask what telemetry is collected, what an investigation looks like and what response actions an administrator can take.

Device isolation

If a computer appears compromised, the ability to isolate it from other systems can help contain an incident while investigation occurs. Determine whether isolation is available in the product and license being considered.

Vulnerability visibility

Endpoint security increasingly overlaps with vulnerability and security-posture management. Visibility into outdated software, risky configurations or exposed applications can help a business reduce opportunities for attack before malware is involved.

Feature names and availability vary significantly by vendor and subscription tier, so confirm what is actually included.

Windows and macOS support

Do not assume a product provides identical functionality on every operating system. If the business uses both Windows and macOS, compare supported features for each platform rather than checking only whether a Mac agent exists.

Server protection

Servers often have different licensing, deployment and operational requirements from employee laptops. Inventory file servers, application servers, database servers and other infrastructure before choosing the number and type of licenses.

Policy and tamper protection

Security software should not be easy for ordinary users—or malware—to disable. Look at policy enforcement, tamper protection and administrative permissions.

Web and phishing protection

Some endpoint suites include controls intended to reduce access to malicious websites or phishing destinations. These controls are useful, but they should complement rather than replace dedicated business email security, MFA and user awareness.

Endpoint security does not replace patching

Even excellent endpoint security should not become an excuse to leave operating systems and applications unpatched.

Attackers may exploit vulnerabilities before or instead of deploying conventional malware. Businesses need an inventory of supported devices and software, a process for installing security updates and a plan for replacing systems that can no longer receive appropriate updates.

If a security suite includes patch or vulnerability-management features, confirm exactly what they do. Finding an outdated application is not necessarily the same as automatically patching it.

Endpoint security does not replace MFA

A protected laptop does not prevent every account takeover.

If an attacker obtains an employee's Microsoft 365, Google Workspace, VPN or SaaS credentials, the incident may occur primarily at the identity or cloud-service layer. Multifactor authentication remains one of the most important controls a small business can deploy.

This is why our Small Business Cybersecurity Checklist treats endpoint security as one layer of a broader security program rather than the entire program.

Endpoint security does not replace password management

Employees still need unique credentials and a safe way to manage them. Reusing passwords across business services can create risk even when every laptop has endpoint protection installed.

See our guide to whether a small business needs a password manager and our comparison of business password managers for that part of the security stack.

Endpoint security does not replace email security

Email remains a major route for phishing, credential theft, malicious attachments and social engineering. Endpoint security may block some malicious files or destinations, but it cannot solve every email-security problem.

Microsoft 365 and Google Workspace environments should also evaluate anti-phishing controls, account protection and email authentication. Our small-business email security guide explains those layers separately.

Endpoint security does not replace backups

Security tools reduce risk. Backups address the reality that prevention can fail and data can also be lost for reasons unrelated to malware.

A small business should maintain recoverable copies of important data and test restoration rather than assuming endpoint protection makes backup unnecessary.

If you are building that layer now, start with our small-business backup solutions guide and backup-frequency guide.

Do remote employees change the decision?

Yes. Remote and hybrid work can make centralized endpoint visibility more important because devices are no longer continuously connected to an office network.

When comparing products, consider how policies and updates reach remote computers, whether administrators can see device status over the internet, how lost or compromised laptops are handled and whether the product depends on resources available only inside the office.

Remote devices should also use disk encryption, strong authentication and appropriate device-management controls where practical.

What about employee-owned devices?

Bring-your-own-device arrangements complicate endpoint security because the business may not fully control the computer accessing its data.

Before installing business security agents on personally owned devices, define what the company is permitted to manage, monitor or remove. In many cases, issuing a business-owned computer provides clearer security and support boundaries.

Should the business use the same protection on every computer?

Consistency is usually helpful, but not every endpoint has identical risk.

An employee laptop, a point-of-sale system, a file server and an executive's travel laptop may require different policies or additional controls. What matters is that those differences are intentional and documented rather than the result of forgotten devices.

How much administration can your business realistically handle?

This is one of the most important questions in the entire buying process.

A feature-rich security platform can create more work than expected. Someone must review alerts, maintain policies, investigate detections, handle exclusions, onboard new devices, remove retired devices and confirm that agents remain healthy.

For a business owner with no IT staff, an endpoint product that assumes a security analyst is watching the console may be a poor operational fit even if its technical capabilities are excellent.

For an organization with an MSP or experienced internal administrator, deeper controls may be useful because someone is actually available to operate them.

Questions to ask before buying antivirus software for a small business

Use these questions when comparing vendors or talking with an IT provider:

1. What devices are covered?
Confirm Windows, macOS, Linux and server support as applicable.

2. Which features are included in this exact license?
Do not rely on a vendor's overall platform feature list.

3. Is EDR included?
If so, determine what investigation and response capabilities are available.

4. Who monitors alerts?
If the answer is your business, identify the person who owns that responsibility.

5. Is 24/7 monitoring included?
Do not assume that an EDR product automatically includes a staffed security operations center.

6. What happens after a serious detection?
Ask whether the vendor alerts you, isolates the device, investigates the incident, performs remediation or provides instructions for your IT team.

7. How are remote devices managed?
Confirm that off-site computers remain visible and protected.

8. Are servers licensed separately?
Include servers in both technical and cost comparisons.

9. Can ordinary users disable protection?
Review tamper protection and administrative controls.

10. What security products do we already own?
Microsoft 365 or an MSP agreement may already provide capabilities you have not deployed.

Three practical small-business scenarios

Scenario 1: Ten-person Microsoft 365 Business Premium company

This business should investigate Microsoft Defender for Business before automatically buying another endpoint suite. The organization may already license substantial endpoint-security capabilities through Business Premium.

The next question is operational: who configures Defender, verifies device onboarding and responds to alerts? If nobody has that responsibility, the business might need outside IT or managed security help even though the underlying software is already licensed.

Scenario 2: Thirty-device business wanting a dedicated security console

A business that wants a purpose-built endpoint-security platform independent of its Microsoft subscription should compare products such as Bitdefender GravityZone and Sophos.

The evaluation should include operating-system support, server requirements, management workload, EDR capabilities and the exact feature set of the proposed license.

Scenario 3: Small company with no security staff

This business should think beyond antivirus product comparisons and evaluate who will monitor security events.

An MDR provider or an MSP offering managed endpoint security may be more appropriate than handing an advanced EDR console to a business owner who has neither the time nor the security expertise to operate it.

A practical endpoint-security checklist

Before considering the project complete, verify that:

✓ Every business-owned computer is inventoried.
✓ Supported endpoint protection is installed and active.
✓ Security policies are centrally managed where practical.
✓ Protection cannot be casually disabled by ordinary users.
✓ Operating systems and important applications receive security updates.
✓ Remote computers remain visible to administrators.
✓ Servers have an explicit protection and licensing plan.
✓ Someone owns alert review and incident response.
✓ MFA protects important business accounts.
✓ Employees use strong, unique passwords.
✓ Important data is backed up separately.
✓ Restore procedures are tested.
✓ Email security and phishing controls are addressed separately.
✓ Departing employees and retired devices are removed promptly.
✓ The security configuration is reviewed periodically.

Frequently asked questions

Does a small business really need antivirus?

Business computers should have active endpoint protection, but that does not always mean purchasing a separate consumer-style antivirus subscription. Windows includes Microsoft Defender Antivirus, while business products can add centralized management, EDR and other capabilities. Evaluate the protection and management model rather than buying software solely because it is labeled antivirus.

What is the best antivirus for a small business?

There is no single product that fits every small business. Microsoft Defender for Business is particularly relevant to Microsoft 365 Business Premium environments. Bitdefender GravityZone is worth evaluating for dedicated centralized endpoint protection. Sophos provides endpoint-security and managed-response options. Malwarebytes Teams is worth evaluating for very small businesses with 20 or fewer devices that prioritize straightforward protection and simpler administration. Businesses without staff to monitor alerts should also evaluate managed EDR or MDR.

Is Microsoft Defender good enough for business?

Microsoft's business security capabilities can be a strong fit, particularly for organizations already using Microsoft 365 Business Premium. The important distinction is between the built-in Defender Antivirus and the broader Defender for Business service. Configuration, monitoring and response responsibilities still need to be addressed.

What is the difference between antivirus and EDR?

Antivirus focuses primarily on preventing and detecting malware. EDR adds deeper endpoint visibility, investigation and response capabilities designed to help identify suspicious behavior and understand what happened during an incident.

What is the difference between EDR and MDR?

EDR is technology for endpoint detection and response. MDR adds a managed service in which security professionals monitor detections and assist with or perform response activities. Exact responsibilities vary by provider, so confirm the service scope.

Do I need antivirus if I have a firewall?

Yes, they address different layers. A firewall controls network traffic; endpoint security protects activity occurring on individual computers. Neither replaces the other.

Does antivirus stop ransomware?

Modern endpoint products include techniques intended to detect and stop ransomware, but no security control should be treated as infallible. Businesses should combine endpoint protection with patching, MFA, least privilege, email security and tested backups.

Should a small business use MDR?

MDR deserves consideration when the business lacks people who can consistently monitor and investigate security alerts. The need depends on risk, budget, internal expertise, business hours, regulatory or contractual requirements and the capabilities of an existing MSP or IT provider.

Bottom line

The best small-business antivirus software is protection your business can actually manage and operate effectively.

For Microsoft 365 Business Premium organizations, start by understanding Microsoft Defender for Business before purchasing overlapping protection. For businesses wanting a dedicated centrally managed endpoint platform, compare products such as Bitdefender GravityZone and Sophos based on the exact license and capabilities you need. For very small organizations with 20 or fewer devices and limited IT resources, Malwarebytes Teams offers a simpler security model worth evaluating before moving into more complex endpoint platforms.

If nobody in your organization can monitor and respond to security alerts, the bigger upgrade may not be another antivirus engine. It may be moving from self-managed endpoint software to managed EDR, MDR or an experienced security provider.

Most importantly, keep endpoint security in context. It is one layer alongside MFA, secure identities, email protection, patching, employee awareness and tested backups. Use our Small Business Cybersecurity Checklist to review the broader security program.

Sources and further reading

Microsoft Learn — Microsoft Defender for Business overview
Microsoft Learn — Get Microsoft Defender for Business
Bitdefender — GravityZone Business Security
Bitdefender — GravityZone security features
Sophos — Endpoint Protection documentation
Huntress — Managed EDR
Malwarebytes — Malwarebytes for Teams
Malwarebytes — Teams FAQ

Product features, licensing and service packages can change. Verify current capabilities, supported operating systems and license terms with the vendor or your IT provider before purchasing.