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Sponge

YC W26

San Francisco, US · Founded 2026 · 3 employees · 11 known investors

Find your way into Sponge

10,649 people in our graph share verified history with the Sponge team — schools, employers, funds. One of them is your warm intro.

Christian Schadunlockedknows Jae Choi · together at BlackBerry (overlapped)
×11knows the team · via Flexport

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 · 11

Y Combinatorlisted by Y CombinatorSan Francisco · $150K

How we know: the Y Combinator directory · Not right? Tell us

645 VenturesreportedNew York · $1M – $15M

How we know: Y Combinator's founder network · 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

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 · $604K – $65M

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

Competitors · 1

by search overlap
Coinstats4 shared keywordsCoinStats 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 competing with Sponge for the same Google search keywords, organic and paid, via search-intersection analysis.

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 Leonis Capital, Y Combinator, 645 Ventures, Amino Capital, Andreessen Horowitz, Balaji Rolling, Coinbase Ventures, Founders Future and 3 more.
Where is Sponge headquartered?
Sponge is headquartered in San Francisco, US.