Side by side
Microsoft Defender for Office 365 vs SpamTitan Gateway
Both stand on email spam filtering software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial Web
Visit Microsoft Defender for Office 365 
Free trial Self-hostedWeb
SpamTitan Gateway combines mail-flow administration with spam analysis, antivirus engines, and outbound controls. Its quote-based plan, self-hosted deployment, and unspecified trial duration are worth weighing before choosing it.
Visit SpamTitan GatewayThe facts
| Microsoft Defender for Office 365 | SpamTitan Gateway | |
|---|---|---|
| Free plan | Not published | A free trial |
| Open source | Not published | Not published |
| Runs on | Web | Self-hosted, Web |
| Lowest paid plan | See the plans | Free or on request |
| Plans published | 5 | 1 |
| Maker | Microsoft | Not published |
| Website | microsoft.com | spamtitan.com |
| On email spam filtering software | #5 of 11 | #1 of 11 |
Microsoft Defender for Office 365: what it does well
SpamTitan Gateway: what it does well
- Reports 99.97% spam detection and 0.03% false positives.
- Includes Bitdefender and Clam AV antivirus engines.
- Supports unlimited users and multiple domains.
- Offers a free trial signup.
- Can be white-labeled and integrated through an API set.
What to know first
- No free plan is listed.
- Pricing is by quote for the Gateway plan.
- Self-hosted systems are recommended to use a web application firewall.
Alternatives to Microsoft Defender for Office 365 Alternatives to SpamTitan Gateway The whole list