United States · Investor

Phosphor Capital

Last cheque observed Mar 2026; 1 cheques on record.

VC firmDeploying nowNew fund $34M, Jul 2025

Pre-seedSeedVenture Capital & Private Equity

Deploying now
100%of best year1cheques in 12 months, 1 on record
Since the last cheque240days00hrs00min00sec
Median round$6.0MRounds led0 of 1
Pitch Phosphor Capital

Phosphor Capital highlights

  1. 01

    1 cheques in the last 12 months

  2. 02

    Mostly Seed: 100% of its rounds

What they do

Phosphor Capital invests in the top founders in each Y Combinator batch.From their own website
Type
VC firm
Cheque size
Not stated
Stages
Pre-seedSeed
Sectors
Venture Capital & Private Equity
Based in
San Francisco, United States
Cold pitches
Not stated

The record

Every round we can evidence, newest first1 appearances

  1. 2026

    1 round

  2. Mar
    AgentMailSeed · US · TechCrunch$6.0MWith 6 others

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

What they claim to have backed

From their own portfolio page (on their website)

21 of 29 we have independently watched raise

ArchilCirclebackCorgiCrustdataDeepnightDiditDomuFazeshiftGreenboardGumloopHenryMastraMdhubMomenticParahelpPhonelyPointoneReductoSameSolidroadStarcloudAndonlabsDiodeHarperinsureShopgarageSygaldrySyncTamarindUsebrainbase

Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded.

Recently backed

The latest companies Phosphor Capital put money into.

Quick answers about Phosphor Capital

What does Phosphor Capital invest in?

Phosphor Capital invests most often at Seed (100% of the rounds on record), in sectors such as Venture Capital & Private Equity.

How active is Phosphor Capital?

1 investments on record, 1 of them in the last 12 months. The most recent was in Mar 2026.

What has Phosphor Capital invested in recently?

Its most recent investments on record: AgentMail (Seed, Mar 2026).

How big are Phosphor Capital's cheques?

The median round it joins is $6.0M.

Is Phosphor Capital investing now?

Yes: it is actively investing, with 1 investments in the last 12 months.

What kind of investor is Phosphor Capital?

Phosphor Capital is a VC firm based in San Francisco, United States.

Has Phosphor Capital raised a new fund?

Its latest fund filing with the SEC was in Jul 2025, reporting $34M raised.

Where does this information on Phosphor Capital come from?

From 1 articles and filings naming it in a round, public registers and its own website, checked and rebuilt every night.

Raising now?

Find the investors who back rounds like yours, and keep every conversation on one fundraising board.

Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it