Sponge

Financial infrastructure for the agent economy

YC-W26Early

What Sponge does

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.

No open roles recorded right now.

That does not mean they are not hiring — plenty of roles never reach a job board. The careers page below is the earliest place a new opening appears.

Check the company’s own careers page — linked at the top — before a job board. A role appears there first, sometimes weeks before it is syndicated anywhere else.

Questions and experiences

Nobody has asked anything about Sponge yet. If you have interviewed here, what you know is worth more to the next person than anything on the rest of this page.

Reviewed before it appears. Do not include anything that identifies you or anyone else.

Company facts compiled from public sources and last refreshed 9 September 2026. Details change; treat the company’s own site as the authority.

jobo is a browser extension. Open this on a computer to install it.