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Built for the obsessive reader
Complete control over your reading environment. No noise, just signal.
Inbox decluttering that actually works
Connect your Gmail and LetterFlow automatically identifies every newsletter. They sync to your reading library while your inbox stays clean.
In this article, we look at how Reddit carried out this migration and what behavioral signals they use...
Behavioral signals, API tokens, and the last frameworks
In this article, we look at how Reddit carried out this migration and what behavioral signals they use...
Organization that makes sense
Create folders, build custom feeds, and organize 200+ newsletters.
Global Search
Find that article you vaguely remember in seconds.
Never miss what's new
Activity
The inbox was built for work.
Not for reading.
We believe newsletters are the last bastion of thoughtful writing on the internet. But they are trapped in a tool designed for stress, urgency, and to-do lists.
When you open your inbox, you are in "reactive mode". You are sorting, archiving, and replying. It is impossible to shift into "deep reading mode" when a bill notification sits right next to a thoughtful essay on philosophy.
LetterFlow exists to separate the signal from the noise. We give your newsletters the dignity they deserve: a quiet room, a comfortable chair, and powerful tools to keep everything organized.
Everything you need to know
Is this only for newsletters?
Not at all. LetterFlow is perfect for any subscription-based email. Marketing promotions, product changelogs, store updates, and daily digests—we organize anything that isn't a personal email from a human.
What if it filters something I want in my inbox?
You are in full control. Our detection is 99% accurate, but if we get it wrong, you can 'Unfollow' content back to your Gmail inbox or manually add missed subscriptions with a single click.
Do you have a mobile app?
Yes. LetterFlow is a Progressive Web App (PWA). You can install it directly from your browser on iOS, Android, or Desktop. It works just like a native app, without the app store friction.
Is my data secure?
We only access emails identified as subscriptions. We do not store your personal correspondence, sell your data, or use it for ad targeting. Your reading habits are yours alone.