10 Best Cybersecurity Companies for Small Businesses in the US (2026)

Verizon’s 2025 Data Breach Investigations Report found ransomware in 88% of breaches at small and midsize businesses, against 39% at larger organizations. Attackers most often get in through stolen logins, unpatched software or phishing, so the companies below protect those entry points: endpoint protection with detection and response (EDR) on every laptop and server, multi-factor authentication on every login, and 24/7 monitoring by analysts who can isolate an infected device in the middle of the night. They split three ways: platforms you or your IT provider run (Microsoft, CrowdStrike, SentinelOne, ESET, Bitdefender), managed services that watch your systems around the clock (Huntress, Sophos, Arctic Wolf), and focused tools such as Cisco Duo for secure logins and ThreatDown’s simple endpoint bundles. Here’s how they compare:

At a glance

#NameReader votes
01 Microsoft Defender for Business 0
02 CrowdStrike 0
03 Huntress 0
04 Sophos 0
05 SentinelOne 0
06 Cisco Duo 0
07 Arctic Wolf 0
08 ThreatDown 0
09 ESET 0
10 Bitdefender 0

Microsoft Defender for Business

★ Top pick
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Microsoft (Nasdaq: MSFT) offers the security most small businesses can switch on fastest. Defender for Business, at $3 per user a month on an annual plan, adds antivirus, endpoint detection and response with automatic attack disruption, vulnerability management and automated investigation for up to five devices per user. It is also included in Microsoft 365 Business Premium ($22 per user a month on an annual plan), which adds email security, Intune device management and Entra ID identity protection, and a Defender Suite add-on ($10 per user a month) brings Microsoft’s enterprise E5 security to Business Premium. Licensing is the catch: plans stop at 300 users, servers need an add-on and the options overlap. Best for: businesses with up to 300 users that already run on Microsoft 365.

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CrowdStrike

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CrowdStrike, the Austin, Texas company (Nasdaq: CRWD) behind the Falcon platform, sells small-business bundles online without a sales call. Falcon Go, for up to 100 devices at $59.99 per device a year, covers antivirus, USB device control and mobile protection; firewall management starts with Falcon Pro ($99.99), and endpoint detection and response with Falcon Enterprise ($184.99 per device a year). Falcon Complete adds CrowdStrike’s own 24/7 managed detection and response, priced on request. In July 2024 a faulty CrowdStrike update crashed about 8.5 million Windows devices, so ask any vendor how it tests and stages its updates. Best for: businesses that want top-tier endpoint protection they can buy and run themselves.

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Huntress

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Huntress, a Maryland company founded in 2015 by former NSA operators, was built for small and midsize businesses and the IT providers who serve them. Behind its managed EDR for laptops and servers sits a 24/7 security operations center, and it adds identity threat detection, a SIEM and security awareness training. Unusually for this market, prices are published: $8.99 per endpoint a month for EDR and $4.80 per identity a month for identity protection. Most customers buy through their managed IT provider; buying direct requires at least 50 seats. In 2024 it raised $150 million at a valuation above $1.5 billion. Best for: small businesses that work with an MSP and want round-the-clock monitoring without enterprise prices.

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Sophos

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Sophos, the British security company founded in 1985 and owned by private equity firm Thoma Bravo since 2020, runs a 24/7 managed detection and response service, Sophos MDR, that can work on top of Microsoft, CrowdStrike or SentinelOne tools you already own. It connects to 500+ endpoint, network, cloud, identity and email products and includes uncapped incident response and a breach-protection warranty; Sophos’s own endpoint protection covers Windows, macOS and Linux. Pricing is by quote through IT partners. In February 2025 Sophos completed its $859 million purchase of Secureworks. Best for: small businesses without a security team that want 24/7 monitoring through their IT provider.

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SentinelOne

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SentinelOne, the Mountain View, California company (NYSE: S) founded in 2013, sells AI-driven endpoint, cloud and identity protection under its Singularity brand at published prices: Singularity Complete, with endpoint and cloud protection plus detection and response, costs $179.99 per endpoint a year, and Singularity Commercial ($229.99) adds identity threat detection, 90 days of data retention and managed threat hunting. In July 2026 IDC named it a leader in managed detection and response for midsize companies. A May 2025 cloud configuration error took its management consoles offline for hours, though endpoints stayed protected. Best for: businesses with some IT staff that want strong endpoint protection at a published price.

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Cisco Duo

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Duo, the identity security business of Cisco (Nasdaq: CSCO), covers one of CISA’s four essentials for small businesses: multi-factor authentication on every login. The Free edition protects up to 10 users at no cost; Essentials, at $3 per user a month, adds single sign-on, passwordless and phishing-resistant MFA and checks that only trusted devices get in, while Advantage ($6) and Premier ($9) add risk-based authentication and VPN-less remote access. Under 100 users, seats are sold in blocks of 10. In May 2025 Cisco expanded Duo into a full identity and access management product. Best for: any small business that needs multi-factor authentication and single sign-on on a small budget.

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Arctic Wolf

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Arctic Wolf, founded in 2012 and based in Eden Prairie, Minnesota, sells security operations as a service: analysts watch your endpoints, network, cloud and identities around the clock on its Aurora platform, and every customer gets a named Concierge Security Team that helps fix what they find. Pricing is by quote only, and the service is aimed more at midsize organizations than at five-person offices. In February 2026 it bought Sevco Security to add exposure assessment, which shows where you are most likely to be attacked. Best for: midsize businesses that want to outsource their security team entirely.

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ThreatDown

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ThreatDown, formerly Malwarebytes’ business unit and headquartered in California, sells endpoint protection in four bundles: Core (next-generation antivirus), Advanced (adds EDR with ransomware rollback), Elite (adds 24/7 human-led managed detection and response) and Ultimate MDR Plus (adds identity threat detection and premium support). Small businesses can buy online, priced per device per year, or go through a partner. In May 2026 it launched identity threat detection and response to stop attacks that use stolen logins. Best for: small businesses that want simple, low-cost endpoint protection with the option of 24/7 monitoring.

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ESET

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ESET, a privately owned European security company founded in 1992, relaunched its ESET PROTECT line on September 30, 2026 with tiers sized for smaller businesses, rolling out first in the US. Core, from five seats, covers ransomware, phishing and zero-day protection; Premium and Ultimate, from ten seats, add 24/7 managed detection and response run by ESET’s own experts, with live access to its threat hunters on Ultimate. The relaunch also introduced a cyber warranty of up to $1 million. Because the tiers are new, check current per-seat pricing with ESET or a reseller. Best for: small businesses that want endpoint protection with the option of vendor-run 24/7 monitoring.

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Bitdefender

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Bitdefender, founded in Romania in 2001, packages its business protection for companies with 1 to 100 devices as GravityZone Small Business Security: anti-phishing, ransomware mitigation and protection against fileless attacks and exploits on Windows, macOS and Linux computers and file servers, run from one central console that Bitdefender says needs no security expertise or dedicated staff. Web and device control and network attack defense cost extra, and subscriptions renew automatically. In June 2025 it agreed to buy Mesh Security to strengthen email protection. Best for: very small businesses that want strong protection they can set up and run themselves.

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Bottom line

For most small businesses the practical starting point is Microsoft Defender for Business, or Microsoft 365 Business Premium if you also want email, device and identity protection in the same license, plus multi-factor authentication on every login (Cisco Duo’s free edition covers up to 10 users). If nobody watches security alerts at night, add a 24/7 managed service: Huntress if you work with a managed IT provider, Sophos MDR for broad coverage through a partner, or Arctic Wolf if you are a midsize company that wants to outsource security entirely. CrowdStrike and SentinelOne are the strongest picks when you want to run top-tier endpoint protection yourself, while ThreatDown, ESET and Bitdefender suit very small teams on tighter budgets. Whoever you choose, ask how the vendor tests and rolls out updates, what its analysts do when they find an attack at 2 a.m., and what incident response costs.

How much does cybersecurity cost for a small business?

Endpoint protection with detection and response typically costs about $3 to $20 per user or device a month. Published prices include Microsoft Defender for Business at $3 per user a month, Huntress managed EDR at $8.99 per endpoint a month, CrowdStrike Falcon Go at $59.99 per device a year (EDR starts with Falcon Enterprise at $184.99) and SentinelOne Singularity Complete at $179.99 per endpoint a year. Multi-factor authentication runs from free to $9 per user a month with Cisco Duo. Fully managed 24/7 services such as Arctic Wolf, Sophos MDR and CrowdStrike Falcon Complete are quoted individually.

What is the difference between EDR and MDR?

EDR (endpoint detection and response) is software that records activity on each computer, flags suspicious behavior and lets someone isolate an infected machine. MDR (managed detection and response) adds people: the vendor’s analysts watch those alerts around the clock and respond for you. A small business without its own security staff usually needs MDR, or an IT provider who supplies it, because an alert nobody reads at 2 a.m. does not stop ransomware.

What security basics should every small business have?

CISA’s four cybersecurity essentials for businesses are: train staff to spot phishing and think before they click; require strong passwords (at least 16 characters or a five-to-seven-word passphrase, unique for every account and kept in a password manager); require multi-factor authentication, preferably phishing-resistant methods such as security keys rather than text-message codes; and keep software updated, with automatic updates turned on and internet-facing systems patched first.

How our rankings are made

Reader votes

One vote per reader per tool, bot-filtered. Votes decide the order — the most-voted tool is #1, shown as real numbers.

Verified use

Reviews are weighed by evidence of real use by US businesses — not by volume.

Editorial analysis

We test the tools, read the pricing fine print, and write the reviews. Your votes set the ranking.

No vendor pays for placement.