Email testing for teams who ship fast
We built InboxSim because we were tired of accidentally sending test emails to real customers.
Simplify email testing
Make email testing so simple and delightful that developers can focus on building great products instead of worrying about broken emails reaching production.
How it started
Every developer knows the pain: you're testing a new email template, hit send, and realize too late that it went to your entire customer list. Or you spend hours debugging why emails look broken in Outlook.
We built InboxSim to solve these problems. A dedicated inbox for test emails. Beautiful previews that work across devices. Team sharing that makes collaboration effortless.
Simple tools, built for teams who move fast.
What we believe
Speed matters
Testing should be instant. No waiting, no friction, no complicated setup.
Teams collaborate
Email testing isn't just for developers. Everyone should be able to preview and approve.
Privacy first
Your data is yours. We never sell it, and we delete old emails automatically.
Fair pricing
No hidden fees. No surprises. Pay for what you use and scale as you grow.
Ready to ship emails with confidence?
Join developers who trust InboxSim for email testing.