Compare
Inbox OSS vs the alternatives
Honest, side-by-side comparisons against every major email service provider. We name competitors directly because our customers deserve a clear picture, and because we are confident in the comparison.
Direct comparisons
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Inbox OSS vs SendGrid
The original transactional email service, owned by Twilio. We are the open, predictable, marketing-included alternative.
Inbox OSS vs Mailgun
Developer-focused email API with per-tier feature gating. We offer the same APIs with the full marketing suite at every tier.
Inbox OSS vs Postmark
Transactional-only specialist with excellent deliverability. We match the deliverability and add the full marketing platform.
Inbox OSS vs Amazon SES
AWS-native low-cost SMTP. We offer comparable per-message pricing plus marketing, validation, and deliverability tooling that SES does not include.
Inbox OSS vs Resend
Modern developer-experience-first email API. We share the design philosophy and add enterprise compliance + marketing campaigns.
Start sending email in under 5 minutes.
Free plan includes 3,000 emails/month forever. No credit card required.