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
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Companies
Solugen
Critical Materials
Astranis
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Biorender
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PathAI
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Akasa
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Hexium
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ANA Therapeutics
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Avail
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Berkeley Yeast
Critical Materials
Betty Labs
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Blockfolio
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Checkerspot
Critical Materials
Clover Health
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Coinbase
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Enzyme
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FactoryFour
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Granza Bio
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Uniform Teeth
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is a senior care marketplace and was acquired by $IAC.

engineers yeast to do incredible things.

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

was a crypto wallet and was acquired by FTX.

helps the world communicate science.

is modern emergency department software.

is advancing medicine with intelligent pathology.

manufactures chemicals using biology.

helps reduce energy costs and emissions.

is building a virtual immune system.

provides lifelong mental health support.

is fighting COVID and was acquired by $NRBO.

is modernizing revenue cycle operations for healthcare.

is a nicotine alternative company.

is bringing the chemical industry online.

is a global parametric flood insurance solution.

is building a large physics foundation model for the weather.

builds advanced spacecraft for sustained maneuver.

creates specialized lipids for premium brands.

is making safer drugs.

develops orally-inhaled therapeutics.

provides medication and support for quitting opioids.

is developing therapeutics for the immune system.

manufactures the most advanced electric powertrains.

provides virtual surgery consults and was acquired by Mendaera.

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

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

is developing the pill for men.

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

helps couples have healthy babies.

is software for aerospace and defense.

enriches isotopes for nuclear energy.

is automation tech and was acquired by $XMTR.

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

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

unlocks a deeper understanding of your mind.

is building novel products for cell and gene therapy.

is bringing land back online.

uses immune organoids to design drugs.

is telehealth orthodontics and was acquired by Impress.

is AI inference infrastructure at the metro edge.

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

is a modern employer health plan.

is advancing hormone-free IVF.

is building biodefense technologies.

edits crop genomes and activates novel traits.

is personalized therapies for rare disease.

uses AI to build autoimmune therapeutics.

is a digital recovery program and was acquired by Monument.

builds and operates Micro GEO satellites.

uses living neurons to improve AI models.

is toxin removal for our bodies.

is the simplest, smartest backup home battery.

is robotics for data centers.

uses AI and robotics to develop novel drugs.

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

is the foundation model for the subsurface.

is robotics for the grid.

helped providers get paid and was acquired by $HCAT.

develops off-the-shelf cancer therapies.

transforms kelp into chemicals.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee