Transforming founder energy into lasting brilliance.

It takes a decade to build a great company.
Our mission is to make sure founders are shining brightly for the full journey.

Phosphor Capital invests in the top founders in each Y Combinator batch.

We invest early, bring conviction and help relentlessly.  

Portfolio Snapshot

Reducto
Didit
Gumloop
Andon Labs
Corgi
Deepnight
Harper
Diode Computers
Domu
Fazeshift
Sygaldry
Phonely
Starcloud
Tamarind
Circleback
Alex
Garage
Greenboard
Parahelp
sync
Archil
Henry
Mastra
Momentic
PointOne
Brainbase
CrustData
mdhub
Same
Solidroad

Testimonials

When I needed some advice on an important decision for Diode, Kulveer picked up the phone within 5 minutes and talked to me as only an experienced founder could. Bullish on Phosphorcap.

Davide Asnaghi, Diode

We're lucky to have Kulveer on board. He helped us win a key early customer a month after investing, helped re-calibrate our hiring efforts at an important inflection point, and as a former founder, is someone I feel comfortable having truly important conversations with. We feel like we can ask him anything.

Adit Abraham, Reducto

Kulveer was literally a day one investor in FutureClinic, and has a cult following amongst the YC community for a reason. Really excited to hear about Phosphor Capital.

Usama Syed, FutureClinic

One of the most supportive and top tier investors to work with.

Michael Mounajjed, Durate

One of my favorite / most helpful investors. The sheer amount of effort Kulveer takes to help us win is insane. Intros, advice, generally anything in between.

Prady Modukuru, Sync

Origin Story

Zeus Living (YC S11) was my moonshot. Zero to $450M revenue, $200M raised, pandemic pivots, layoffs and ultimately, a 2023 sale to Blueground. Good, but not the independent company outcome I wanted. I've lived every founder extreme: pivot hell, blitzscaling, cofounder turnover, board pressure. I now channel those scars into an unfair edge for the next wave of YC founders.

I've been a part of the YC ecosystem for 18 years. I've cofounded companies with Patrick and  John Collison, Harj Taggar and Tom Blomfield, and written 200+ post YC checks. Phosphor Capital exists to turn that lived insight into being the best investor in YC companies. Phosphor Capital launched in January 2024 with a $17M Fund I.