SMTP vs Zimbra
Both are Communication tools. Below, the differences that matter: verified pricing, editorial scores and who each one is really for.
SMTP: SMTP.com is a reliable email relay API and delivery platform, offering scalable plans from $25/month for 50k emails. Pricing: from $25/mo. (data verified August 2026)
Zimbra: Zimbra is an open-source email and collaboration suite featuring secure email, calendar, file sharing, and data sovereignty. Pricing: Free. (data verified August 2026)
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At a glance
 SMTP ◆ |
 Zimbra | |
|---|---|---|
| Rating | — | — |
| Pricing | from $25/mo | Free |
| Pricing model | Free | Free |
| Category | Communication | |
| Visit website → | Visit website → | |
Editorial scorecard
Editorial score from our review methodology — not user ratings.
| Ease of use | 7.5 | 6.5 |
| Features depth | 8.0 | 8.0 |
| Value for money | 6.5 | 8.5 |
| Support quality | 7.0 | 7.0 |
| Integrations | 8.5 | 7.5 |
| Scalability | 8.5 | 8.5 |
| Documentation | 6.0 | 6.5 |
| Onboarding speed | 8.0 | 5.5 |
| Overall | 7.5 | 7.3 |
Frequently asked questions
What is SMTP?
SMTP.com is a reliable email relay API and delivery platform, offering scalable plans from $25/month for 50k emails.
What is Zimbra?
Zimbra is an open-source email and collaboration suite featuring secure email, calendar, file sharing, and data sovereignty.
How much do SMTP and Zimbra cost?
SMTP: from $25/mo. Zimbra: Free.
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