Abnormal Security vs KnowBe4
Updated June 2026 · A structured head-to-head comparison.
AI-native email security against BEC
The verdict
Both Abnormal Security and KnowBe4 are credible email security tools, and the right pick comes down to your priorities.
Choose Abnormal Security if you want a higher overall rating (4.8/5). AI-native email security against BEC
Choose KnowBe4 if you'd rather have a longer free trial (30 days). Security awareness training and phishing simulation
Abnormal Security vs KnowBe4: side by side
| Dimension | Abnormal Security | KnowBe4 |
|---|---|---|
| Starting price | Custom | Custom |
| Free plan | No | No |
| Free trial | — | 30 daysWinner |
| Pricing model | Subscription | Subscription |
| Best for | Enterprise, Mid Market, Security Teams | Smb, Enterprise, It Teams |
| Platforms | Web, Api | Web, Api |
| Rating | 4.8/5Winner | 4.6/5 |
Abnormal Security key facts
- Vendor
- Abnormal Security
- Pricing
- Subscription — Custom
- Free tier
- No
- Platforms
- Web, Api
- Best for
- Enterprise, Mid Market, Security Teams
- Editor rating
- 4.8 / 5
- Founded
- 2018
- Headquarters
- San Francisco, USA
KnowBe4 key facts
- Vendor
- KnowBe4
- Pricing
- Subscription — Custom
- Free tier
- Free trial (30 days)
- Platforms
- Web, Api
- Best for
- Smb, Enterprise, It Teams
- Editor rating
- 4.6 / 5
- Founded
- 2010
- Headquarters
- Clearwater, USA
Frequently asked questions
Is Abnormal Security better than KnowBe4?
Neither is universally better — Abnormal Security edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Abnormal Security or KnowBe4 cheaper?
Abnormal Security is the more affordable of the two to get started, at custom. Abnormal Security starts at custom; KnowBe4 starts at custom.
Can Abnormal Security replace KnowBe4?
Yes for most teams — both are email security tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.