# Fluency Email Rule Change Workflow vs Microsoft Defender for Office 365: side-by-side comparison (2026) [Fluency Email Rule Change Workflow](https://cybersectools.com/tools/fluency-email-rule-change-workflow) is a commercial [BEC protection](https://cybersectools.com/categories/bec-protection) solution by [Fluency Security](https://cybersectools.com/companies/fluency-security). [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Microsoft](https://cybersectools.com/companies/microsoft). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365) Best for: Teams running Microsoft 365 It is on the list because it is built into Microsoft 365, and many companies already own it through their license, so the buying question is often settled before you start. That makes it the natural first layer if you run Microsoft 365. Decide whether it covers your risk alone or needs a second product beside it, since it is built to work with other email security products. From [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). ## Side-by-side comparison | | Fluency Email Rule Change Workflow | Microsoft Defender for Office 365 | |---|---|---| | Pricing model | Commercial | Commercial | | Category | BEC Protection | Email Security Platforms | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Fluency Security | Microsoft | | Headquarters | – | – | ### Use cases and capabilities | | Fluency Email Rule Change Workflow | Microsoft Defender for Office 365 | |---|---|---| | Alerting | Yes | – | | Data Exfiltration | Yes | – | | Workflow | Yes | – | | Microsoft 365 | – | Yes | ### Core features **Fluency Email Rule Change Workflow** 6 features listed. Sign in on the page to see them. **Microsoft Defender for Office 365** 10 features listed. Sign in on the page to see them. ### Integrations **Fluency Email Rule Change Workflow** No integrations listed. **Microsoft Defender for Office 365** 4 integrations listed. Sign in on the page to see them. ## Fluency Email Rule Change Workflow vs Microsoft Defender for Office 365 FAQ Common questions when comparing Fluency Email Rule Change Workflow vs Microsoft Defender for Office 365 for BEC protection. ### What is the difference between Fluency Email Rule Change Workflow and Microsoft Defender for Office 365? **Fluency Email Rule Change Workflow**: AI-based workflow detecting suspicious email rule changes tied to BEC attacks, built by Fluency Security. **Microsoft Defender for Office 365**: Email and collaboration security for Microsoft 365 environments, built by Microsoft. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Fluency Email Rule Change Workflow and Microsoft Defender for Office 365? **Fluency Email Rule Change Workflow** is made by Fluency Security. **Microsoft Defender for Office 365** is made by Microsoft. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Fluency Email Rule Change Workflow a good alternative to Microsoft Defender for Office 365? In part. Fluency Email Rule Change Workflow and Microsoft Defender for Office 365 are not in the same category on CybersecTools. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Fluency Email Rule Change Workflow vs BreachQuest](https://cybersectools.com/compare/breachquest-vs-fluency-email-rule-change-workflow) - [Fluency Email Rule Change Workflow vs Outtake Verify](https://cybersectools.com/compare/fluency-email-rule-change-workflow-vs-outtake-verify) - [Microsoft Defender for Office 365 vs BreachQuest](https://cybersectools.com/compare/breachquest-vs-microsoft-defender-for-office-365) - [Microsoft Defender for Office 365 vs Outtake Verify](https://cybersectools.com/compare/microsoft-defender-for-office-365-vs-outtake-verify) ## Alternatives to each - [See all Fluency Email Rule Change Workflow alternatives](https://cybersectools.com/alternatives/fluency-email-rule-change-workflow) - [See all Microsoft Defender for Office 365 alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-office-365) --- Source: https://cybersectools.com/compare/fluency-email-rule-change-workflow-vs-microsoft-defender-for-office-365 For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/fluency-email-rule-change-workflow.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Fluency Email Rule Change Workflow and Microsoft Defender for Office 365: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md