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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is building a virtual immune system.

enriches isotopes for nuclear energy.

uses immune organoids to design drugs.

helps the world communicate science.

develops orally-inhaled therapeutics.

is modern emergency department software.

provides medication and support for quitting opioids.

engineers yeast to do incredible things.

is advancing medicine with intelligent pathology.

uses living neurons to improve AI models.

develops off-the-shelf cancer therapies.

helped providers get paid and was acquired by $HCAT.

is AI inference infrastructure at the metro edge.

builds advanced spacecraft for sustained maneuver.

is the foundation model for the subsurface.

is automation tech and was acquired by $XMTR.

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

is building novel products for cell and gene therapy.

is the simplest, smartest backup home battery.

is making safer drugs.

is fighting COVID and was acquired by $NRBO.

is software for aerospace and defense.

unlocks a deeper understanding of your mind.

manufactures chemicals using biology.

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

helps couples have healthy babies.

provides virtual surgery consults and was acquired by Mendaera.

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

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

is bringing the chemical industry online.

uses AI to build autoimmune therapeutics.

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

is telehealth orthodontics and was acquired by Impress.

is modernizing revenue cycle operations for healthcare.

builds and operates Micro GEO satellites.

provides lifelong mental health support.

is advancing hormone-free IVF.

is toxin removal for our bodies.

was a crypto wallet and was acquired by FTX.

manufactures the most advanced electric powertrains.

is developing therapeutics for the immune system.

is building a large physics foundation model for the weather.

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

is a global parametric flood insurance solution.

is bringing land back online.

is a modern employer health plan.

transforms kelp into chemicals.

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

is personalized therapies for rare disease.

creates specialized lipids for premium brands.

is developing the pill for men.

is robotics for the grid.

is robotics for data centers.

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

is a digital recovery program and was acquired by Monument.

edits crop genomes and activates novel traits.

helps reduce energy costs and emissions.

is building biodefense technologies.

is a nicotine alternative company.

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

uses AI and robotics to develop novel drugs.

5

Funds

$50M

Size

$1-2M

Checks

1

Employee