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Sponge

YC W26

San Francisco, US · Founded 2026 · 3 employees · 12 known investors

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Paysponge provides financial infrastructure for AI agents, enabling them to hold, spend, and earn money through credit cards, bank accounts, and crypto. The platform offers both agent accounts and a payment gateway for businesses to accept payments directly from agents.

AI & Machine LearningCrypto & Web3Enterprise SoftwareFintechUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W26)

Sponge was founded in 2026 by Eric Zhang, Jae Choi, and Rishab Luthra.

EZEric Zhang
Eric ZhangCo-FounderEric Zhang is a co-founder of Sponge (YC W26) and previously worked on the crypto team at Stripe.
JCJae Choi
Jae ChoiCo-FounderJae Choi is a co-founder at Sponge and previously worked on crypto initiatives at Stripe.
RLRishab Luthra
Rishab LuthraCo-FounderRishab Luthra is a co-founder of Sponge (YC W26) and previously worked in the crypto division at Stripe.

Investors · 12

Leonis Capitallisted by Leonis CapitalSan Francisco

How we know: Leonis Capital's portfolio page · the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Amino CapitalreportedPalo Alto · $100K – $10M

How we know: Y Combinator's founder network · Not right? Tell us

Andreessen HorowitzreportedMenlo Park · $500K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

Balaji RollingreportedLynnwood

How we know: Y Combinator's founder network · Not right? Tell us

Blast.Clubreported$5.5M

How we know: Y Combinator's founder network · Not right? Tell us

Coinbase VenturesreportedSan Francisco · $100K – $10M

How we know: Y Combinator's founder network · Not right? Tell us

Founders FuturereportedParis

How we know: Y Combinator's founder network · Not right? Tell us

OurCrowdreportedJerusalem

How we know: Y Combinator's founder network · Not right? Tell us

Unpopular VenturesreportedMiami · $100K – $500K

How we know: Y Combinator's founder network · Not right? Tell us

Venture Investment AssociatesreportedPeapack

How we know: Y Combinator's founder network · Not right? Tell us

Related companies · 2

RapidRapid (formerly RapidAPI) ran an API marketplace letting developers discover, test, and integrate thousands of third-party APIs via a unified account and SDK.
CoinstatsCoinStats is a crypto portfolio tracker that connects users' wallets and exchanges to track, buy, swap, and stake assets across 120+ blockchains, 300+ wallets/exchanges, and thousands of DeFi protocols. It targets crypto investors managing portfolios across multiple platforms and DeFi protocols.

Companies working in the same space as Sponge.

Legal entities · 1

corporate structure
Sponge Inc.

In the news

Sponge: Financial infrastructure for the agent economyycombinator.com · Feb 2026Sponge Funding | Complete Analysis | Extruct AIextruct.ai

Frequently asked questions

What does Sponge do?
Paysponge provides financial infrastructure for AI agents, enabling them to hold, spend, and earn money through credit cards, bank accounts, and crypto. The platform offers both agent accounts and a payment gateway for businesses to accept payments directly from agents.
Who founded Sponge?
Sponge was founded by Eric Zhang, Jae Choi, Rishab Luthra in 2026.
Who are Sponge's investors?
Sponge's investors include 645 Ventures, Leonis Capital, Y Combinator, Amino Capital, Andreessen Horowitz, Balaji Rolling, Blast.Club, Coinbase Ventures and 4 more.
Where is Sponge headquartered?
Sponge is headquartered in San Francisco, US.