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

develops orally-inhaled therapeutics.

is a global parametric flood insurance solution.

is the foundation model for the subsurface.

was a crypto wallet and was acquired by FTX.

is personalized therapies for rare disease.

is developing therapeutics for the immune system.

provides lifelong mental health support.

is modernizing revenue cycle operations for healthcare.

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

is building a large physics foundation model for the weather.

develops off-the-shelf cancer therapies.

manufactures chemicals using biology.

is advancing medicine with intelligent pathology.

uses living neurons to improve AI models.

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

builds advanced spacecraft for sustained maneuver.

helps the world communicate science.

helps reduce energy costs and emissions.

edits crop genomes and activates novel traits.

is toxin removal for our bodies.

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

manufactures the most advanced electric powertrains.

is software for aerospace and defense.

is a modern employer health plan.

is building novel products for cell and gene therapy.

is fighting COVID and was acquired by $NRBO.

uses immune organoids to design drugs.

provides virtual surgery consults and was acquired by Mendaera.

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

is the simplest, smartest backup home battery.

is bringing land back online.

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

is a digital recovery program and was acquired by Monument.

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

uses AI and robotics to develop novel drugs.

creates specialized lipids for premium brands.

is building biodefense technologies.

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

is developing the pill for men.

unlocks a deeper understanding of your mind.

is robotics for data centers.

helps couples have healthy babies.

is a nicotine alternative company.

enriches isotopes for nuclear energy.

is building a virtual immune system.

is modern emergency department software.

is robotics for the grid.

helped providers get paid and was acquired by $HCAT.

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

transforms kelp into chemicals.

is bringing the chemical industry online.

is automation tech and was acquired by $XMTR.

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

uses AI to build autoimmune therapeutics.

provides medication and support for quitting opioids.

builds and operates Micro GEO satellites.

is AI inference infrastructure at the metro edge.

is making safer drugs.

engineers yeast to do incredible things.

is advancing hormone-free IVF.

is telehealth orthodontics and was acquired by Impress.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee