Email security used to be like a bouncer at a club. It checked names at the door. Today, attackers wear fake mustaches, copy your boss’s writing style, and ask for gift cards before lunch. That is where Abnormal Security comes in. It uses AI to spot strange email behavior before trouble lands in your inbox.
TLDR: Abnormal Security is an AI email security platform built to catch phishing, business email compromise, vendor fraud, and account takeovers. It is best for companies using Microsoft 365 or Google Workspace that want smart protection with low manual work. For example, a 500 person finance team could use it to flag a fake invoice request from a “vendor” before someone sends $42,000 to the wrong account. Pricing is quote based, so you need to contact sales for exact numbers.
What Is Abnormal Security?
Abnormal Security is a cloud email security platform. It focuses on threats that older filters often miss. These include sneaky attacks with no bad links, no malware, and no obvious red flags.
Think of it as a detective for your inbox. It learns what normal email behavior looks like. Then it asks, “Hmm, why is the CEO suddenly emailing from a weird location asking for a wire transfer?”
That is the main idea. Abnormal does not only scan email content. It studies behavior, relationships, login activity, vendor patterns, and communication history.
Key AI Email Security Features
Abnormal Security has many tools. But the magic is in how it connects signals. It looks at who sent the message, who received it, what they usually discuss, and whether anything feels “off.”
1. Inbound Email Protection
This is the core feature. Abnormal blocks attacks before users click, reply, or panic. It can stop:
- Phishing emails that try to steal passwords.
- Business email compromise, also called BEC.
- Credential theft attacks.
- Malware and malicious links.
- Social engineering emails with no attachments at all.
The last one matters a lot. Many modern attacks are just plain text. No virus. No bad file. Just a fake message that says, “Can you handle this payment today?” Sneaky little goblin.
2. Behavioral AI Detection
Abnormal builds a model of normal behavior. It learns how people in your company talk. It also learns how outside partners and vendors behave.
For example, if your real supplier usually sends invoices from one domain, Abnormal can notice when a fake supplier uses a similar domain. It may catch tiny tricks like payrnents.com instead of payments.com.
This is very useful for spotting vendor fraud. Attackers love pretending to be vendors because finance teams trust familiar names.
3. Account Takeover Protection
An account takeover is when an attacker gets into a real user’s email account. This is extra dangerous. The email is not coming from a fake address. It is coming from a real account.
Abnormal looks for odd login behavior and suspicious email activity. For example:
- A user logs in from a new country at 3:12 a.m.
- They create strange forwarding rules.
- They send many unusual emails in a short time.
- They contact people they never email.
If it sees enough weirdness, it can alert your security team. In some setups, it can also help remediate the threat.
4. Vendor and Supply Chain Protection
This is one of Abnormal Security’s strongest areas. Supply chain email attacks are tough. They do not always look like classic phishing.
Imagine your company works with 300 vendors. Now imagine one vendor gets hacked. The attacker sends a real-looking invoice from a real thread. Yikes.
Abnormal maps vendor relationships. It watches for changes in tone, payment details, domains, and behavior. This helps stop invoice fraud before the money leaves the building.
5. Security Posture Management
Abnormal also helps teams understand risk. It can show which employees are targeted most often. It can highlight risky mailboxes. It can also give visibility into attack trends.
This is helpful for security leaders. Instead of guessing, they can say, “Our finance and HR teams receive 63% of impersonation attempts.” That makes training and controls easier to plan.
6. Automated Remediation
Nobody wants to manually remove 800 malicious emails before breakfast. Abnormal can help automate cleanup.
If a threat is found after delivery, it may remove similar emails from other inboxes. This reduces damage. It also gives security teams more time to drink coffee like normal humans.
What Is Abnormal Security Like to Use?
Abnormal is designed to be simple for security teams. It connects through APIs to Microsoft 365 or Google Workspace. That means you usually do not need to reroute mail through a gateway.
This can make deployment faster. It also means users may not notice a big change. The best security tools are often quiet. Like ninjas. Very responsible ninjas.
The dashboard is built for investigation. Admins can review attacks, see why a message was flagged, and take action. The platform also gives context. That is important because security teams do not want mystery alerts. They want answers.
Abnormal Security Pricing
Abnormal Security does not publish standard pricing on its website. Pricing is usually quote based. It depends on company size, number of mailboxes, product modules, contract length, and support needs.
In general, expect enterprise style pricing. This is not usually a tiny “$5 per month” tool for one person. It is built for businesses that need serious email protection.
Common pricing factors may include:
- Number of users or mailboxes.
- Selected features, such as account takeover or vendor protection.
- Microsoft 365 or Google Workspace environment size.
- Support and onboarding needs.
- Annual contract terms.
If you are evaluating Abnormal, ask for a demo and a proof of value. Also ask how many threats it would have caught in your real email environment over the last 30 to 90 days. That number can make the buying decision much clearer.
Pros and Cons
Pros
- Strong AI detection for modern email attacks.
- Great for BEC and vendor fraud.
- API based deployment can be easier than old gateways.
- Good visibility into user and vendor risk.
- Automated remediation saves time.
Cons
- Pricing is not public, so budgeting takes extra steps.
- May be more than small teams need.
- Best value comes in larger environments.
- Requires trust in AI decisions, so review workflows matter.
Best Abnormal Security Alternatives
Abnormal is strong, but it is not the only fish in the cyber sea. Here are some alternatives worth checking.
1. Proofpoint
Proofpoint is a major name in email security. It offers strong protection, threat intelligence, encryption, and user training. It is popular with large enterprises.
Choose Proofpoint if you want a mature platform with many security layers. It may feel heavier than Abnormal, but it has deep controls.
2. Mimecast
Mimecast offers email security, archiving, continuity, and awareness training. It is a good fit for companies that want more than threat blocking.
Choose Mimecast if you want email protection plus compliance and backup style features.
3. Microsoft Defender for Office 365
Microsoft Defender for Office 365 is a natural option for Microsoft shops. It protects against phishing, malware, and unsafe links. It also integrates well with Microsoft security tools.
Choose it if you already live inside Microsoft 365 and want one connected ecosystem.
4. Google Workspace Security Tools
Google includes built in protections for Gmail and Workspace. These tools are useful, especially for smaller teams.
Choose Google’s native tools if you want simple protection and already use Gmail. For advanced attacks, you may still want an extra layer.
5. Tessian
Tessian focuses on human layer security. It helps prevent misdirected emails, data loss, and social engineering attacks.
Choose Tessian if your biggest worry is users making mistakes with sensitive data.
Who Should Use Abnormal Security?
Abnormal Security is a strong fit for mid sized and large companies. It is especially useful for businesses with finance teams, many vendors, and a high risk of impersonation attacks.
It is also a good choice if your team is tired of noisy alerts. The AI context can help reduce busywork. Instead of chasing every strange email, your team can focus on the risky ones.
Industries that may benefit include:
- Finance and banking.
- Healthcare.
- Legal services.
- Manufacturing.
- Technology companies.
- Retail and ecommerce.
Final Verdict
Abnormal Security is a powerful AI email security platform for stopping the attacks that old filters miss. Its biggest strengths are behavioral detection, vendor fraud protection, account takeover defense, and automated cleanup.
The main downside is pricing transparency. You need a custom quote. Still, for companies facing serious phishing and BEC risk, the value can be easy to justify.
If your inbox feels like a haunted house full of fake invoices, password traps, and “urgent” CEO requests, Abnormal Security may be the flashlight you need. Just remember to compare it with Proofpoint, Mimecast, Microsoft Defender, and other tools before signing. A safer inbox is great. A smart buying decision is even better.