Directory
Mathieu Costes

Mathieu Costes

Verified: Sep 2026 (SMTP Validated)🌱 Pre-Seed Pioneer
San Francisco, CA
𝕏in
Check Size Range

Flexible Check Size

Preferred Stages
pre-seedseed

Background & Investment Thesis

Partner at Merck. Active early-stage technology angel investor and VC.

Focus Industries

aisaas
AI Outreach Insight94% Match Score

Active investor in ai, saas. Highly responsive to concise pitches with clear traction metrics.

Unlock Verified Direct Email & Founder Pitch Tools

Get instant access to Mathieu Costes's verified mailbox, personalized AI pitch drafts, and 7,400+ active angel profiles.

Key Deal Terms & Quick Facts

Audited venture due diligence summary for Mathieu Costes

Verified Deal Signals
Typical Check Size

Undisclosed ($25k – $250k typical for early angels)

Direct angel check per syndicate / round
Target Stages
pre-seedseed
Early-stage entry valuation priority
Founder Pitch Contact

Verified (Protected — Unlock)

Direct mailbox protected against spam
Focus Industries & Categories
aisaas

Frequently Asked Questions about Mathieu Costes

What is Mathieu Costes's typical angel check size?▼

Mathieu Costes's investment check size typically ranges around Undisclosed ($25k – $250k typical for early angels), participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.

What stages and sectors does Mathieu Costes invest in?▼

Mathieu Costes primarily backs early-stage startups across pre-seed, seed stages, focusing on ai, saas.

What companies are in Mathieu Costes's angel portfolio?▼

Mathieu Costes actively participates in early-stage technology investments and venture syndicates.

How can startup founders contact or pitch Mathieu Costes?▼

Founders can access verified direct email contact channels, AI-assisted pitch drafting, and syndicate warm intro paths for Mathieu Costes through OpenAngels.