Skip to content
Inbox OSS
All posts

Company

Inbox OSS crosses 10 billion emails delivered

Three years from first commit to 10B. A note on what we are proud of and what we are still working on.

SQ

Saqib Qureshi

CEO · March 12, 2026 · 6 min read

Three years ago, we shipped our first email through Inbox OSS. Today we crossed 10 billion total deliveries.

A few things we are proud of: 99.99% inbox placement (industry average is closer to 96%), 0.4% average bounce rate with validation enabled, 0.02% average complaint rate. SOC 2 Type II, GDPR DPA, HIPAA available. Open source core.

A few things we are still working on: faster onboarding for enterprise accounts, better self-serve deliverability tooling, deeper integrations with the major CRM and CDP platforms.

Thanks to every customer, every contributor, every operator who pushed us to be better.

Start sending email in under 5 minutes.

Free plan includes 3,000 emails/month forever. No credit card required.