Ben Stein

General Partner, Cartography Capital
Oakland-based Ben Stein moved from hands-on roles at Square and Opendoor to angel investing since 2017, backing physical infrastructure, deep tech, and global supply chain startups, including early Teamshares.
How to contact Ben Stein
Stages their fund invests in
No items found.
N/A
Sectors their fund invests in
N/A
Avg Check
N/A
Does their fund Lead?
No
N/A
Geos their fund invests in
Ben Stein
Stages their fund invests in
No items found.
N/A
Sectors their fund invests in
AI
Biotech
Materials
Deeptech / Hardware
Energy
N/A
Avg Check
N/A
Leads?
No
N/A
Close X
Industries
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Info out of date? Let us know

About Ben Stein

Ben Stein spent years in hands-on operating roles at companies like Square and Opendoor before becoming an investor, and he was personally angel investing as early as 2017, including an early bet on Teamshares before it went public. He focuses on physical infrastructure, deep tech, and global supply chains rather than typical software startups, and he lives in Oakland while investing in the San Francisco area.

About their Fund

Cartography Capital

Sectors
AI, Biotech, Materials, Deeptech / Hardware, Energy
Rounds
Avg Check Size

Cartography Capital invests in the raw materials and infrastructure that underlie technologies like AI chips, quantum computers, robots, batteries, solar panels, biotech, and space tools, backing companies in areas such as carbon-capture-to-graphite biotech, electric hydrofoils, AI-driven materials discovery, and mineral exploration rather than typical software startups. Run by an operator-heavy team with a track record of helping drive over $550 million in VC funding, the fund follows a quiet, low-profile approach aimed at select investors who are comfortable taking on this kind of risk alongside the partners.

Notable Fund
Investments

No items found.

Sheets they're in

No items found.

Sheets they're Fund is in

No items found.
Is this information out of date? Let us know

Popular Investors

investor name
Active in
Rounds
Avg. Check
Links
Deeptech / Hardware
Robotics
Biotech
+
12
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Biotech
Health
Deeptech / Hardware
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
Unknown
Biotech
Health
Climate
+
4
View more in profile...
Unknown
Seed - Series B+
Unknown
$1M - $3M
Unknown
Climate
Deeptech / Hardware
Materials
+
4
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
7
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
~$750K
Unknown
Fintech
Deeptech / Hardware
Devtools
+
2
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
AI
Biotech
Robotics
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$100K - $500K
Unknown
Or automatically find your investor matches
Upload your pitch deck to get your best investor matches in minutes.
Reveal the very best VCs to pitch for your startup
Get matching investors' email addresses
No ads. No catch. Free from VC Sheet.
Must be a valid email  to receive results
Upload and Submit Deck (50MB Max)
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Success. Check your email in 5 minutes.
Browse Sheets
Sheet Type
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Browse
Sheets

Sheets are curated lists of funds and investors for various sectors, stages and geographies.

Sector-focused sheets

Stages-focused sheets

Geography-focused sheets

Misc sheets

No results match these filters...