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
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Astranis
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Biorender
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Berkeley Yeast
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Checkerspot
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provides virtual surgery consults and was acquired by Mendaera.

is automation tech and was acquired by $XMTR.

is bringing land back online.

uses living neurons to improve AI models.

is advancing medicine with intelligent pathology.

is fighting COVID and was acquired by $NRBO.

edits crop genomes and activates novel traits.

is making safer drugs.

uses AI and robotics to develop novel drugs.

engineers yeast to do incredible things.

is developing the pill for men.

is advancing hormone-free IVF.

is software for aerospace and defense.

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

is telehealth orthodontics and was acquired by Impress.

is a digital recovery program and was acquired by Monument.

is AI inference infrastructure at the metro edge.

is robotics for the grid.

is building novel products for cell and gene therapy.

is the foundation model for the subsurface.

is modernizing revenue cycle operations for healthcare.

is building a virtual immune system.

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

unlocks a deeper understanding of your mind.

is a modern employer health plan.

is a global parametric flood insurance solution.

is building a large physics foundation model for the weather.

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

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

uses immune organoids to design drugs.

provides lifelong mental health support.

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

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

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

helps reduce energy costs and emissions.

uses AI to build autoimmune therapeutics.

helped providers get paid and was acquired by $HCAT.

helps the world communicate science.

is the simplest, smartest backup home battery.

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

helps couples have healthy babies.

manufactures the most advanced electric powertrains.

is toxin removal for our bodies.

builds and operates Micro GEO satellites.

manufactures chemicals using biology.

is building biodefense technologies.

is modern emergency department software.

is personalized therapies for rare disease.

builds advanced spacecraft for sustained maneuver.

provides medication and support for quitting opioids.

develops off-the-shelf cancer therapies.

is a nicotine alternative company.

enriches isotopes for nuclear energy.

was a crypto wallet and was acquired by FTX.

is robotics for data centers.

is bringing the chemical industry online.

is developing therapeutics for the immune system.

transforms kelp into chemicals.

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

develops orally-inhaled therapeutics.

creates specialized lipids for premium brands.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee