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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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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Berkeley Yeast
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Checkerspot
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Enzyme
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is building a large physics foundation model for the weather.

uses AI to build autoimmune therapeutics.

is developing the pill for men.

uses immune organoids to design drugs.

is automation tech and was acquired by $XMTR.

manufactures the most advanced electric powertrains.

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

is advancing hormone-free IVF.

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

develops off-the-shelf cancer therapies.

unlocks a deeper understanding of your mind.

builds and operates Micro GEO satellites.

transforms kelp into chemicals.

manufactures chemicals using biology.

is advancing medicine with intelligent pathology.

is modern emergency department software.

is the foundation model for the subsurface.

engineers yeast to do incredible things.

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

is building biodefense technologies.

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

is telehealth orthodontics and was acquired by Impress.

is robotics for the grid.

uses AI and robotics to develop novel drugs.

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

builds advanced spacecraft for sustained maneuver.

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

helps couples have healthy babies.

edits crop genomes and activates novel traits.

is a modern employer health plan.

develops orally-inhaled therapeutics.

was a crypto wallet and was acquired by FTX.

is AI inference infrastructure at the metro edge.

is software for aerospace and defense.

is modernizing revenue cycle operations for healthcare.

is toxin removal for our bodies.

uses living neurons to improve AI models.

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

creates specialized lipids for premium brands.

is a global parametric flood insurance solution.

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

is a digital recovery program and was acquired by Monument.

is building novel products for cell and gene therapy.

is robotics for data centers.

provides virtual surgery consults and was acquired by Mendaera.

helped providers get paid and was acquired by $HCAT.

helps reduce energy costs and emissions.

is bringing land back online.

is bringing the chemical industry online.

enriches isotopes for nuclear energy.

helps the world communicate science.

is developing therapeutics for the immune system.

is fighting COVID and was acquired by $NRBO.

provides medication and support for quitting opioids.

is building a virtual immune system.

is a nicotine alternative company.

is the simplest, smartest backup home battery.

is making safer drugs.

is personalized therapies for rare disease.

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

provides lifelong mental health support.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee