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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helps reduce energy costs and emissions.

is developing the pill for men.

is modern emergency department software.

is a nicotine alternative company.

is fighting COVID and was acquired by $NRBO.

is advancing hormone-free IVF.

builds and operates Micro GEO satellites.

is AI inference infrastructure at the metro edge.

is building a large physics foundation model for the weather.

is robotics for data centers.

engineers yeast to do incredible things.

enriches isotopes for nuclear energy.

helps the world communicate science.

provides medication and support for quitting opioids.

is toxin removal for our bodies.

manufactures chemicals using biology.

builds advanced spacecraft for sustained maneuver.

is a modern employer health plan.

is building a virtual immune system.

manufactures the most advanced electric powertrains.

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

is building biodefense technologies.

provides virtual surgery consults and was acquired by Mendaera.

is developing therapeutics for the immune system.

is software for aerospace and defense.

is a digital recovery program and was acquired by Monument.

is automation tech and was acquired by $XMTR.

is bringing land back online.

is the simplest, smartest backup home battery.

uses living neurons to improve AI models.

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

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

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

uses immune organoids to design drugs.

creates specialized lipids for premium brands.

develops orally-inhaled therapeutics.

is personalized therapies for rare disease.

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

is the foundation model for the subsurface.

is robotics for the grid.

unlocks a deeper understanding of your mind.

edits crop genomes and activates novel traits.

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

transforms kelp into chemicals.

uses AI and robotics to develop novel drugs.

uses AI to build autoimmune therapeutics.

was a crypto wallet and was acquired by FTX.

is making safer drugs.

is bringing the chemical industry online.

is modernizing revenue cycle operations for healthcare.

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

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

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

develops off-the-shelf cancer therapies.

is building novel products for cell and gene therapy.

helped providers get paid and was acquired by $HCAT.

helps couples have healthy babies.

is a global parametric flood insurance solution.

is advancing medicine with intelligent pathology.

is telehealth orthodontics and was acquired by Impress.

provides lifelong mental health support.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee