Mailwarm YC Application

Summer 2020Active

Mailwarm went through Y Combinator in the Summer 2020 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Summer 2020
Industry: B2BSales
Team size: 10
Status: Active
Launched: 2020

Founders

Amine BenjellounFounder

What Mailwarm does

Mailwarm is the email deliverability company. We help senders get into the inbox and stay there, through products, tools, and services built for both humans and AI agents. ✦ Mailwarm.com: The original email warmup tool. Build sender reputation automatically through real, positive inbox interactions across a large network of mailboxes, with built-in monitoring and deliverability insights. ✦ ThemailX.com: Instant deliverability diagnostics for AI agents and humans. Check all protocols SPF, DKIM, DMARC, Inbox placement and more via MCP, API, or web. Get specific fixes and actions, not just scores. ✦ Mailadept.com: Email deliverability on autopilot. A subscription-based, AI-native service where agents and deliverability experts collaborate to audit your setup, fix issues, and monitor inbox placement continuously. Build reputation with Mailwarm, diagnose problems with themailX, fix and maintain with mailadept. Doing email marketing or cold outreach? Book a call through mailadept.com, we'll show you which one fits.

Mailwarm's YC application, reconstructed

Y Combinator application

Mailwarm, Summer 2020 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Mailwarm

Describe what your company does in 50 characters or less.

Prevents your emails from landing in spam.

What is your company going to make? Please describe your product and what it does or will do.

We build tools and services to improve email deliverability. Our main product, Mailwarm, automates email warmup by creating real inbox interactions to build sender reputation. We also offer themailX for deliverability diagnostics, and Mailadept, an AI-native subscription service that audits setups, fixes issues, and monitors deliverability continuously. Together, they help marketers and sales teams keep their emails out of spam folders.

Where do you live now, and where would the company be based after YC?

We live in Paris, Île-de-France, France and plan to keep the company based here after YC.

Explain your decision regarding location.

We built Mailwarm here and have a team established in Paris. Staying local allows us to maintain our current momentum and culture while accessing European markets.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Mailwarm YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Mailwarm's public data (launch notes, founder backgrounds, product description). It shows how a company like Mailwarm would present itself to YC, not the text they submitted.