Risking It All?

Better Call Zal.


I’m Zal (rhymes with “Saul”), solo GP at Refactor. For over a decade, I’ve backed founders refactoring the real world: atoms, not bits.

I invest $1–2M in seed stage hard tech startups across the US. One investor managing $300M across five funds. If we work together, I want to be your first call.

Submit your pitch → it goes straight to my inbox.

A Refactor founder coined “Better Call Zal.” I try to earn it every day.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee
CATEGORIES
Clear filters
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Companies
Solugen
Critical Materials
Astranis
Aerospace
Biorender
Health
Curative
Health
PathAI
Health
Akasa
Health
Hexium
Energy
Brelle
Energy
Epana Bio
Immune
Causal Labs
Earth Systems
TBC
AI Infra
General Galactic
Aerospace
Inferra
AI Infra
Lucy
Exits
Pilgrim
Applied Bio
64-X Bio
Applied Bio
Able Health
Exits
Adventris
Applied Bio
ANA Therapeutics
Exits
Atlas
Health
Avail
Exits
Berkeley Yeast
Critical Materials
Betty Labs
Exits
Blockfolio
Exits
Checkerspot
Critical Materials
Clover Health
Exits
Coinbase
Exits
Enzyme
Exits
FactoryFour
Exits
Floodbase
Earth Systems
Granza Bio
Immune
Headspace
Health
Hero
Exits
Kip
Exits
Knowde
Critical Materials
Loyal
Applied Bio
Macro Oceans
Critical Materials
Miist
Applied Bio
Octant
Applied Bio
Onyx Bio
Immune
Ophelia
Health
Orchid Health
Fertility
Parallel Bio
Immune
Phytoform
Applied Bio
Picnic Health
Health
Pila Energy
Energy
Remedy Scientific
Earth Systems
Stealth A
Stealth
Stealth B
Stealth
Stealth C
Stealth
Stealth D
Stealth
Stealth E
Stealth
Stealth F
Stealth
Stealth G
Stealth
Tempest
Exits
Thalo Labs
Earth Systems
Umbrella
Exits
Uniform Teeth
Exits
Vital Health
Health
Vitra Labs
Fertility
YourChoice
Fertility

is building a large physics foundation model for the weather.

helps the world communicate science.

edits crop genomes and activates novel traits.

transforms kelp into chemicals.

unlocks a deeper understanding of your mind.

develops orally-inhaled therapeutics.

is a mental health company and was acquired by Modern Health.

is developing the pill for men.

built Locker Room and was acquired by Spotify ($SPOT).

is telehealth orthodontics and was acquired by Impress.

is building biodefense technologies.

manufactures chemicals using biology.

is the foundation model for the subsurface.

helps couples have healthy babies.

is automation tech and was acquired by $XMTR.

is a cryptocurrency exchange and went public ($COIN).

is robotics for data centers.

enriches isotopes for nuclear energy.

is bringing land back online.

is building novel products for cell and gene therapy.

develops off-the-shelf cancer therapies.

is bringing the chemical industry online.

is robotics for the grid.

is a modern employer health plan.

is modernizing revenue cycle operations for healthcare.

helped providers get paid and was acquired by $HCAT.

builds advanced spacecraft for sustained maneuver.

gives our best friends (our dogs) more time with us.

is the simplest, smartest backup home battery.

manufactures the most advanced electric powertrains.

is a senior care marketplace and was acquired by $IAC.

engineers yeast to do incredible things.

structures the world's medical data and makes it useful.

is modern emergency department software.

is advancing hormone-free IVF.

is fighting COVID and was acquired by $NRBO.

provides virtual surgery consults and was acquired by Mendaera.

is toxin removal for our bodies.

is developing therapeutics for the immune system.

is personalized therapies for rare disease.

uses living neurons to improve AI models.

uses AI and robotics to develop novel drugs.

helps reduce energy costs and emissions.

is advancing medicine with intelligent pathology.

is a CRM app and was acquired by People.AI.

is a global parametric flood insurance solution.

uses AI to build autoimmune therapeutics.

is building a virtual immune system.

is making safer drugs.

is a Medicare Advantage plan and went public ($CLOV).

creates specialized lipids for premium brands.

uses immune organoids to design drugs.

is a nicotine alternative company.

is software for aerospace and defense.

provides medication and support for quitting opioids.

builds and operates Micro GEO satellites.

was a crypto wallet and was acquired by FTX.

provides lifelong mental health support.

is AI inference infrastructure at the metro edge.

is a digital recovery program and was acquired by Monument.

is FDA compliance as a service and was acquired by $ROIV.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee