Estimated monthly cost comparison — not just the headline price
Brevo and Microsoft 365 do different jobs, so this is not a like-for-like comparison. The prices below are shown side by side for reference only; compare what each tool does before comparing cost.
Prices change often — confirm on the vendor's site before buying. Report incorrect pricing →
Quick Take
Different tools for different jobs — no cost winner
Based on advertised price plus documented recurring fees, not your exact usage.
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
Estimated monthly cost
$27
/month (illustrative)
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
Estimated monthly cost
$113.50
/month (illustrative)
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 |
| Estimated Monthly Cost | $27/mo | $113.50/mo | — |
| Recurring Extra Fees | +$27/mo | +$107.50/mo | Brevo |
| One-Time Costs | $0 | $0 | — |
| # Documented Fees | 3 | 4 | — |
| Pricing Tiers | 3 | 3 | — |
| Affiliate Program | None | No public affiliate program | — |
Brevo advertises $0/mo and Microsoft 365 advertises $6/mo. Brevo has 3 documented extra fees (recurring: +$27/mo), while Microsoft 365 has 4 (recurring: +$107.50/mo). Brevo and Microsoft 365 do different jobs, so there is no like-for-like cost winner — compare what each one does before comparing price. Your real cost depends on seats and usage — use the calculator for your numbers.
Brevo has 3 documented extra fees: Daily Send Limit on Free, Brevo Logo on Free & Starter, Landing Pages & A/B Testing Paywall. Recurring fees add roughly $27/mo on top of the $0/mo advertised price.
Microsoft 365 has 4 documented extra fees: Desktop Apps Require Business Standard, Copilot AI Add-On, Compliance Features Require E5, Teams Phone Add-On. Recurring fees add roughly $107.50/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 compiled from public vendor pricing pages and documentation. It uses illustrative assumptions (see "Cost Comparison Summary"), not your exact seats or usage, and vendor prices change often. Confirm current prices on each vendor's site, and use our calculator with your own usage for a closer estimate. Spotted an error? Email hello@trulycritic.com.
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