Stamp

The AI Secretary for Email and Calendar.

0.9Score#995 of 999 agents#4 of 4 in Executive assistant

Why it ranks #995

Stamp, an AI executive assistant from YC W25, ranks #995 of 999 AI agents and #4 of 4 in Executive assistant, with a score of 0.9 of 10. Data as of 3 Oct 2026.

The score adds four parts, each 0 to 10, by weight. Every point comes from public evidence. How scoring works ·

Proof 0 × 30% 0.0
Scale 0 × 30% 0.0
Momentum 0 × 25% 0.0
Autonomy 6 × 15% 0.9
= 0.9

Proof
Do customers use it? 30% of the score
0
No public claims of customers or revenue yet.
Not found: revenue or growth (+4), named customers (+3), a customer result (+2), a customer count (+2), work done at scale (+2)
Scale
Is there a real company behind it? 30% of the score
0
1 person.
Not found: funding round in its news (+3)
Momentum
Is it shipping and growing now? 25% of the score
0
Nothing new in the last 6 months.
Not found: launch YC post in the last 6 months (+3), open roles on YC (+2), new traction claim in the last 6 months (+2), funding news in the last year (+2), a batch in the last year (it is YC Winter 2025) (+1)
Autonomy
How much of the job does it do on its own? 15% of the score
6
Supervised agent: takes actions in other systems; a person approves key steps.
- +6
  Level 2 of 4: Supervised agentTakes actions in other systems; a person approves key steps.
What the model read
- Acts in other systems: 74% likely
- Finishes whole tasks: 20% likely
- Calls itself an agent: 5% likely
Level 2: Takes actions in other systems; a person approves key steps.

About Stamp

Stamp is the first AI Native inbox. It's more than an email client, though -- it's like your second brain.

Stamp can respond to emails in your voice, organize your inbox to filter out the noise, keep track of action items, and automate essentially every task you're doing manually in your inbox today.