TL;DR: Sponge is a Y Combinator Winter 2026 startup Financial infrastructure for the agent economy, currently active with a team of 3.
Financial infrastructure for the agent economy
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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.
Yes. Sponge was funded by Y Combinator in the Winter 2026 batch. Financial infrastructure for the agent economy
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, a…
Sponge was part of Y Combinator's Winter 2026 batch.
Sponge has a team of 3 people according to Y Combinator's directory.
Sponge is currently listed as Active with a team of 3 in Y Combinator's directory.
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