Approval-first email & calendar layer

Control the conversations
that run your business.

Sentra reads your important threads, prepares your next step, and leaves the final word to you. Up to 4 hours a week recovered — and nothing goes out without your ok.

Book a call See how it works ↓

Currently in validation with operational founders across Italy and Europe.

Up to 0 hours

recovered every week

0 minutes

to handle the emails that matter, every morning

of actions happen only with your ok

The full picture

And this is your full day, organized.

From a single proposal to the complete cockpit — see how Sentra holds your inbox together.

Inside Gmail

Sentra

Caught up on your inbox · 2 minutes ago

09:14

Good morning, Mattia.

I went through the 47 emails that came in overnight. I set 14 aside — promos and newsletters, nothing important. Here are six that need you, sorted by type.

This morning you've already approved 2, edited 1 and rejected nothing. Good pace.

RegardingPietro Chiodahigh certainty

Pietro confirmed availability for Thursday morning. You'd suggested 10:00, and your calendar is still clear. Better to lock it in before it fills up.

I can create the event for you

Google Meet · invite to Pietro

Thursday, June 11

10:00–10:30

RegardingAlessandro Verdimedium certainty

Alessandro asks to move Monday's call. He's free Tuesday from 14:00. You have something at 14:30, so I'm proposing 14:00–14:25 — leaves a five-minute buffer.

I'll replace the event on May 24

Invite to Alessandro · same Meet

Tuesday, May 25

14:00–14:25

RegardingLaura Bianchihigh certainty

Laura has been waiting for two days. She's asking to confirm contract terms and when she can get the updated quote. I've drafted a reply in your tone — just verify one thing.

Draft reply

From Mattia to Laura Bianchi

“Hi Laura, thanks for your patience. Confirming the revised terms: they work for us. I'll send the updated quote by end of day tomorrow. Talk soon, Mattia”

One thing: is the updated quote really ready for tomorrow? If not, change the date before sending.

RegardingSofia Romanomedium certainty

Sofia (board) is asking whether you're holding the Q3 guidance. She's been waiting four hours — not critical yet, but a short reply costs little and reassures the people who matter.

Draft reply

From Mattia to Sofia Romano

“Hi Sofia, I'm holding Q3 guidance — actually, we're slightly above forecast on two metrics. I'll send you the full update Monday morning. Talk soon, Mattia”

Check: are November numbers consolidated? If not, the "Monday" promise becomes risky.

RegardingMarco Ferri−4 dayshigh certainty

You promised Marco the onboarding docs four days ago. It's slipping down the thread — better to close this today before it cools off.

Draft follow-up

With light apology — your tone

“Hi Marco, sorry for the delay. Attaching the onboarding docs now. Let me know if you need anything else to get started. Thanks, Mattia”

RegardingAnna Greco−6 dayslow certainty

You promised Anna the demo recap six days ago. The relationship is in a delicate phase — the longer you wait, the more it costs. A short apology and a follow-through, but check that the tone is personal enough.

Draft follow-up

+ short call proposal

“Hi Anna, sorry for the long delay — attaching the demo recap as promised. If you're up for it, let's catch up for 15 minutes this week on next steps. Mattia”

The Problem

Important conversations don't manage themselves.

Founders and operational executives spend hours navigating threads that should take minutes — without the confidence that nothing slips.

Speed without control isn't a real option

Generic AI tools act before you decide.

Follow-ups slip through the cracks

Important commitments live in threads no one revisits — until it's too late.

Scheduling turns into ping-pong

Back-and-forth coordination eats hours that should go to execution.

How it works

Three steps. Full control.

Connect

Connects in 2 minutes

Link Gmail and calendar: Sentra learns which conversations matter.

Sentra proposes

Proposes from day one

For every important thread, a Proposal Card: clear next step, draft, context.

You decide

You decide, always

Approve, edit, or reject. Nothing happens without your ok.

See Sentra in action

Thread → Proposal → Decision. In 25 seconds.

Watch how Sentra turns an important email into a clear next step you can approve, edit, or reject.

Features

Built for control, not convenience.

Thread Intelligence

Reads the full context of a conversation — not just the last message.

Proposal Cards

Summary, recommended action, draft, and confidence: everything to decide in seconds.

Approval-first

Every action requires your explicit ok. Not a setting — a structural guarantee.

Follow-up Ledger

Tracks every commitment made in your threads. Nothing slips.

Safe Scheduling

Proposals respect your calendar rules, buffers, and protected hours.

Audit Trail

Every decision is logged: you always know what happened, when, and why.

Personal memory

Learns your VIP contacts, working hours, and writing style. It adapts to you — not the other way around.

Compose from cockpit

Write new emails right from the panel, with AI drafting and autosave.

How we compare

Not another AI email tool.

	Sentra	Superhuman	Fyxer AI	Google Gemini	AI Agents (Spark, etc.)	Human EA
Approval-first governance	✅	❌	❌	❌	❌	Not structural
Nothing sent without approval	✅	❌	❌	❌	❌	Trust-based
Proposal Cards with context	✅	❌	Partial	Partial	❌	✅
Follow-up tracking	✅	❌	Partial	❌	❌	✅
Personal memory (VIPs, style)	✅	❌	❌	Partial	❌	✅
Audit trail	✅	❌	❌	❌	❌	❌
Cost	€50/mo	~€30/mo	~€50/mo	Free with Workspace	Variable	€2,000+/mo
Available 24/7	✅	✅	✅	✅	✅	❌

Security & trust

Your data stays yours.

Sentra is built approval-first from the ground up. Here's what that means in practice.

Data encrypted in transit and at rest

No external models trained on your content

Built-in anti-phishing protection

Nothing ever happens without your approval

Design Partner program

Shape Sentra from the ground up.

We're working with a small group of founders, chiefs of staff, and customer success leads to define how AI should handle the conversations that matter. Access is free during this phase: what we ask is that you use it on your real inbox and tell us what doesn't work.

Free access to Sentra until September 30
Direct line to the founders — no tickets, no first-level support
Your feedback enters the roadmap ahead of everyone else
Reserved terms at launch

Access is free until September 30. From October, those who want to continue move to a subscription, with terms reserved for those who joined in this phase.

We're keeping the group deliberately small so we can follow each partner closely.

Stop reacting.
Start governing.

Join the first cohort of design partners shaping how operational founders run their inbox.

Request access →or book a call →

Built by founders, for founders

Who's behind Sentra.

Sentra is built by two operators who've lived the problem. Not a faceless AI startup.

Mattia Riccò

Founder & CEO

Building Sentra to give operational founders the speed they need — without the loss of control they can't afford.

Connect on LinkedIn →

Pietro Chioda

Co-Founder & CTO

Engineer and co-founder. Building the infrastructure that makes approval-first email actually work at scale.

Frequently asked questions.

Your data is yours. Sentra connects through Google's official API with the minimum permissions needed to operate. We do not train models on your content and we do not share your data with third parties. Every action Sentra proposes is visible to you before it happens, and every decision is logged in your audit trail. You can revoke access at any time directly from your Google account settings.