Sponge

Sponge

Financial infrastructure for the agent economy

Winter 2026
Artificial Intelligence
Fintech
SaaS
Crypto / Web3
Payments

About

Sponge is the easiest way for agents to hold and spend money, and for businesses to sell directly to them. For agents: Sponge lets agents hold funds and transact autonomously with other agents and businesses using bank accounts, cards, and crypto. Agents can autonomously purchase services such as email, browser use, and premium data without human involvement. For businesses: Sponge makes it easy to onboard and accept payments from agents without human interaction. Businesses can sell their services directly to agents with a few clicks, no code changes required.

Founders

Jae Choi

Founder

Co-founder Sponge (YC W26). Ex-Stripe Crypto.

Rishab Luthra

Founder

Co-founder Sponge (YC W26). Ex-Stripe Crypto.

Eric Zhang

Founder

Co-founder Sponge (YC W26). Ex-Stripe Crypto.

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