First read
Tone
How it lands.
Sendsei hears your draft the way a stranger would — confident or curt, warm or wounded, direct or cold. You find out before your recipient does.
Spelling was never the problem. The problem is the reply written at 11 p.m., the ask buried under three apologies, the joke that dies the moment it becomes text. Sendsei gives every draft one last, wiser read — how it sounds, what it risks, and, on Black Belt, whether it actually does the thing you sat down to do.
The discipline
Up to three reads before every send.
Second read
Risk
What you’d take back.
The message written furious. The name you shouldn’t have named. The sarcasm that reads as contempt without your face attached. Sendsei flags the sends that follow people around.
Third read Black Belt
Intent
Whether it works.
Tell Sendsei what the email has to accomplish. It tells you, honestly, whether your draft gets you there — or just gets it sent.
Live demo
A minute with Sendsei.
In practice
Watch it read the room.
Everyday practice
The saves you’ll never have to explain.
Knows who’s reading
Your manager, your professor, your landlord. You tell Sendsei who you’re emailing, and it reads the draft with them in mind — the same words land differently in different rooms.
Catches the big stuff
The furious reply, the joke that won’t survive text, the message that says more than it should — flagged plainly, before it leaves the building. That’s White Belt, working.
One verdict, not twenty underlines
No sea of squiggles. Sendsei speaks once, plainly: send it, soften it, or sleep on it.
Compatibility
Works where you write.
Rank up
Choose your belt.
Free
White Belt
Where everyone begins. It catches the big stuff.
$0forever
- Tone read + risk flags on every email
- 4 checks a day
- Tells you who you’re emailing — one audience option
- Works with Gmail and Outlook on the web
Pro
Black Belt
Doesn’t just check the email — makes sure it does its job.
$10per month
- Everything in White Belt, plus…
- The full context form — your intent, the relationship, your tone goal, the stakes. A review tailored to the moment, not generic.
- The intent read — judges whether your draft actually achieves what you’re trying to do, and flags where it drifts
- Tone-drift detection and relationship-aware judgment
- 50 checks a day
- Verdicts judged against your goal — every review is weighed against the intent, relationship, and stakes you set, not read blind
Prices in USD. Cancel anytime — no ceremony.