True cost comparison — not just what the pricing page says
Quick Verdict
Brevo saves you 100%
Best for Brevo
All-in-one marketing platform (formerly Sendinblue). Email-based pricing from Free to $18/mo is attr
Best for Microsoft 365
Microsoft's business productivity suite (Outlook, Teams, Office apps). Per-user pricing where deskto
All-in-one marketing platform (formerly Sendinblue). Email-based pricing from Fr...
Advertised
$0
/month
True Cost
$27
/month (typical)
Daily Send Limit on Free
Free plan limits to 300 emails/day (9,000/mo). A list of 10K contacts can't be emailed in one campai...
Brevo Logo on Free & Starter
Brevo branding appears on all emails on Free and Starter plans. Removing it requires Business plan a...
Landing Pages & A/B Testing Paywall
Landing pages, A/B testing, and advanced statistics require Business plan ($18/mo) or higher. Starte...
Microsoft's business productivity suite (Outlook, Teams, Office apps). Per-user ...
Advertised
$6
/month
True Cost
$114
/month (typical)
Desktop Apps Require Business Standard
Business Basic ($6/user/mo) only includes web and mobile Office apps. Desktop Word, Excel, PowerPoin...
Copilot AI Add-On
Microsoft 365 Copilot AI is $30/user/mo — separate from all base plans. For 50 users, Copilot alone ...
Compliance Features Require E5
Advanced compliance (eDiscovery, DLP, Information Barriers, Insider Risk Management) require Enterpr...
Teams Phone Add-On
Microsoft Teams Phone System for PSTN calling is not included in any standard plan. Teams Phone Stan...
Brevo advertises $0/mo. Microsoft 365 advertises $6/mo.
Brevo has 3 documented hidden fees. Microsoft 365 has 4.
Brevo confidence: 74%. Microsoft 365 confidence: 84%.
| Metric | Brevo | Microsoft 365 | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $6/mo | Brevo |
| True Monthly Cost | $27/mo | $114/mo | Brevo |
| Hidden Fee Total | +$27/mo | +$107.5/mo | Brevo |
| # Hidden Fees | 3 | 4 | Brevo |
| Confidence Score | 74% | 84% | Microsoft 365 |
| Pricing Tiers | 3 | 3 | — |
| Affiliate Program | None | No public affiliate program | — |
Brevo advertises $0/mo and Microsoft 365 advertises $6/mo. However, when you include hidden fees, Brevo has 3 documented hidden fees adding +$27/mo, while Microsoft 365 has 4 hidden fees adding +$107.5/mo. Based on true cost, Brevo is typically 100% cheaper.
Brevo has 3 documented hidden fees: Daily Send Limit on Free, Brevo Logo on Free & Starter, Landing Pages & A/B Testing Paywall. These add approximately +$27/mo on top of the $0/mo advertised price.
Microsoft 365 has 4 documented hidden fees: Desktop Apps Require Business Standard, Copilot AI Add-On, Compliance Features Require E5, Teams Phone Add-On. These add approximately +$107.5/mo on top of the $6/mo advertised price.
Choose Brevo if: All-in-one marketing platform (formerly Sendinblue). Email-based pricing from Free to $18/mo is attr. Choose Microsoft 365 if: Microsoft's business productivity suite (Outlook, Teams, Office apps). Per-user pricing where deskto. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. Brevo data has a 74% confidence score and Microsoft 365 has 84%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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