An organization’s email service is often at the front lines of cybersecurity. It’s the vehicle of choice for some of the most common attack types, including phishing and business email compromise (BEC). As such, finding the best email security company for your needs is key to protecting your workforce and data.

Every communications system has unique needs, so what constitutes the optimal solution can vary between use cases. However, a few industry leaders still stand out among the rest.

Here are the 10 best email security companies to choose from in 2025.

1. Darktrace

Cambridge, U.K.-based Darktrace is the best overall email security provider. The platform centers around artificial intelligence (AI), using this technology to automate repetitive tasks and protect against both known and unknown threats before they can cause much damage.

Darktrace’s self-learning AI learns what your normal communications look like to spot potential breaches without relying on previous reports. It can also detect abnormal login patterns, stop accidental data loss and integrate with popular tools like Microsoft 365. It’s also easy to deploy and manage and comes as part of a broader cybersecurity ecosystem to prevent silos.

2. Abnormal Security

Abnormal’s cloud-based email security solution is another reliable option. Like Darktrace, it employs AI to tailor behavioral biometrics to specific users, which results in far fewer false positives than a more generic, rules-based system.

The platform also extends beyond email, letting you analyze messages across tools like Slack and Teams for more comprehensive coverage. Integrations with Gmail, which accounts for 30.57% of all email opens, and Microsft 365 mean most modern organizations can implement it without interoperability concerns.

3. Proofpoint Threat Detection

Cybersecurity giant Proofpoint is another one of the best email security companies to partner with in 2025. In addition to monitoring inboxes with AI, Proofpoint offers encryption services to keep communications private. It also provides custom firewalls, malware detection and in-depth reporting tools.

Proofpoint Threat Detection has some of the most far-reaching product offerings on the market, but some users report this is a double-edged sword. Responses to help requests can be slow, which may be problematic when a 4.8 million-worker security talent shortage means relying on external help is more common.

4. Cisco Secure Email

Cisco’s Secure Email service also deserves consideration as an enterprise email security solution. It combines multiple AI engines, threat intelligence and reputation-based filters to catch a wide range of inbox-bound threats.

Like Proofpoint, Cisco also encrypts your emails and attachments, which businesses dealing with particularly sensitive data stand to gain much from. Flexible terms, extensive integrations and 24/7 support mitigate cost and complexity concerns, too. However, some users have reported that it doesn’t stop all spam messages.

5. Fortinet FortiMail

You may also consider Fortinet’s FortiMail solution if you need a highly configurable email security platform. FortiMail uses AI and sandbox analysis to protect against known and zero-day threats, works with both on-premise and cloud setups, encrypts outbound messages and comes in multiple licensing tiers.

On top of being one of the more customizable options, FortiMail includes built-in ransomware detection and response. A worrying 59% of all organizations have suffered ransomware attacks in 2024, so this protection is hard to ignore.

6. Check Point Harmony Email and Collaboration

Check Point is another one of the best email security companies of 2025, thanks to its Harmony Email and Collaboration platform. Harmony focuses on securing the cloud, which Gartner predicts will account for 70% of all workloads by 2028. It does so by combining behavioral analytics, malware detection and phishing recognition.

Harmony also includes custom policies so you can tailor access permissions and other protections to your specific needs. As an entirely cloud-based option, though, it has experienced latency issues in some users, so it may not be ideal for larger, faster-moving operations.

7. Cloudflare Email Security

Another cloud-native email cybersecurity platform to consider is Cloudflare. Formerly called Area 1, Cloudflare Email Security emphasizes phishing prevention and BEC protection, although it also includes ransomware detection features. Single sign-on support adds another layer of defense by tightening access controls.

The platform integrates with Cloudflare’s broader Zero Trust solution, which is good for those in high-risk industries. It also supports a range of implementation types for easier deployment. However, some users report issues with the provider’s technical support, which may counteract that benefit.

8. Barracuda Email Protection

Businesses relying heavily on Microsoft products may prefer Barracuda Email Protection. Barracuda centers around Microsoft 365 environments and uses an impressive array of technologies to secure these workflows.

AI can predict threats outside of known signatures, automatic backups prevent data loss, automation reduces workloads and generative AI improves awareness training. Perhaps the only downside is that it’s only a viable option for Microsoft 365 users. While that accounts for 11 million small and medium businesses, you may rely on another email provider.

9. Mimecast Advanced Email Security

Mimecast is another one of the best email security solutions to consider if your teams use a platform outside of Microsoft 365. Its Advanced Email Security platform also supports Google Workspace and other providers, on top of working in both in-cloud and on-premise environments.

The solution is easy to deploy, thanks to flexible implementation, and can inspect QR codes, identify phishing attempts and train employees. At the same time, some customers say the long-term support leaves something to be desired, so it may be best for teams with higher IT skills and experience.

10. IRONSCALES Email Security

Another cloud-native AI-powered email security platform comes from IRONSCALES. This product emphasizes stopping BEC and zero-day attacks through adaptive AI instead of known indicators. While it automates much of the process, it also provides user reporting tools to streamline responses to anything that may slip through the cracks.

IRONSCALES comes in three paid tiers, with a free version you could use if you only want its anti-phishing training features. Higher-cost subscriptions offer more comprehensive protections, though some users report difficulties integrating the solution into their workflows.

How to Determine the Best Email Security Company

Any one of these 10 email security providers is an excellent choice for your organization. However, finding which is best requires an understanding of what you need and what features set a leading solution apart from the rest.

Begin by outlining your budget, as this may limit some of your options. Next, outline any existing software your team uses that you’d prefer to have integrations or some level of compatibility with. The average company uses a staggering 112 software-as-a-service apps, leaving a lot of room for interoperability issues, and any silos can hinder efficient incident responses.

Along similar lines, a solution that offers defenses beyond email-only threat protection is ideal. Still, if you’re happy with an existing system that covers everything but email, you may not need to pay for a more comprehensive option. In that case, just be sure your email defenses are compatible with other cybersecurity tools.

Ease of use and implementation complexity are also worth considering. Faster deployment will result in a quicker return on investment, and software that’s easy to use will produce fewer errors. You can judge these categories by evaluating your employees’ technical expertise before comparing providers.

Capitalize on the Best Email Security Services Today

The best email security companies in 2025 are those with flexible deployments, AI-driven insights and fast response times. Once you know what to look for, you can find an option that suits your needs.

Protecting your business’s emails is key to staving off phishing attempts, BEC and ransomware. Get started today to ensure you and your team remain safe.