Sponge

Active

Financial infrastructure for the agent economy

Winter 2026Founded 20263 peopleSan Francisco, CA, USA

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AI insightcan contain mistakes

Agent Financial InfrastructureSaaSAI platforms, agent developers, fintechsLow competition

Moat

Agent-first payment system (bank accounts, crypto, cards) eliminates human friction; B2B2B2A network effects.

Key risk

Nascent market; regulatory uncertainty on autonomous payments; competing against fintech APIs.

Why now

Agent adoption accelerating; agents need autonomous financial capabilities; fintech infra maturing.

Competitors

Emerging space, fintech payment APIs

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.