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

helps the world communicate science.

helps reduce energy costs and emissions.

is bringing the chemical industry online.

is developing therapeutics for the immune system.

provides lifelong mental health support.

is the simplest, smartest backup home battery.

is developing the pill for men.

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

helped providers get paid and was acquired by $HCAT.

is building biodefense technologies.

is personalized therapies for rare disease.

enriches isotopes for nuclear energy.

is bringing land back online.

edits crop genomes and activates novel traits.

is software for aerospace and defense.

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

uses AI and robotics to develop novel drugs.

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

was a crypto wallet and was acquired by FTX.

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

unlocks a deeper understanding of your mind.

is AI inference infrastructure at the metro edge.

is building a virtual immune system.

is advancing hormone-free IVF.

helps couples have healthy babies.

builds and operates Micro GEO satellites.

is a digital recovery program and was acquired by Monument.

is advancing medicine with intelligent pathology.

is modern emergency department software.

is building a large physics foundation model for the weather.

uses immune organoids to design drugs.

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

is a nicotine alternative company.

is toxin removal for our bodies.

uses living neurons to improve AI models.

is a modern employer health plan.

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

is a global parametric flood insurance solution.

is the foundation model for the subsurface.

is modernizing revenue cycle operations for healthcare.

uses AI to build autoimmune therapeutics.

transforms kelp into chemicals.

develops orally-inhaled therapeutics.

builds advanced spacecraft for sustained maneuver.

provides virtual surgery consults and was acquired by Mendaera.

is building novel products for cell and gene therapy.

is telehealth orthodontics and was acquired by Impress.

is robotics for the grid.

is making safer drugs.

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

develops off-the-shelf cancer therapies.

is robotics for data centers.

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

provides medication and support for quitting opioids.

manufactures the most advanced electric powertrains.

is fighting COVID and was acquired by $NRBO.

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

engineers yeast to do incredible things.

is automation tech and was acquired by $XMTR.

manufactures chemicals using biology.

creates specialized lipids for premium brands.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee