EngineeringArchitecture
Why we built InboxFlow on Rust + Cloudflare
How Rust and the Cloudflare ecosystem give us 60-80% cost savings over legacy email providers without sacrificing reliability.
Thulasi Ram
Blog
Stories from the inbox
Engineering deep dives, deliverability tips, and updates from the InboxFlow team.
PricingTransparency
The hidden cost of overage billing in email APIs
Why "pay as you go" often means "surprise bills" — and how we’re fixing it with transparent pricing.
Thulasi Ram
DeliverabilityIndustry
Google & Yahoo 2024 requirements: What changed and why it matters
A deep dive into the new sender requirements and how they affect your email deliverability strategy.
Thulasi Ram
API DesignDX
One-line email sending: Our API design philosophy
How we designed our API to make sending email a single function call — and why that matters for developer productivity.
Thulasi Ram
EngineeringHistory
From SMTP to edge: The evolution of email infrastructure
How email delivery has evolved from Sendmail to Rust-powered edge infrastructure — and where it’s headed next.
Thulasi Ram
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