Sponge
Product & Competitive Intelligence
Financial infrastructure enabling AI agents to autonomously hold, manage, and spend money.
Company Overview
Builds financial infrastructure for the agent economy, enabling AI agents to autonomously hold, manage, and disburse funds across fiat and crypto via programmable wallets and no-code payment gateways.
Competitive Advantage & Moat
Product Roadmap & Public Announcements
Sponge has publicly announced two core products: Sponge Wallet (agent-native wallets with programmable spending controls, multi-chain support, and fiat+crypto capabilities) and Sponge Gateway (no-code business onboarding via API spec upload so businesses can accept payments from AI agents). They've highlighted first-class support for Claude's Model Context Protocol (MCP) and plan to expand chain coverage across Ethereum, Base, and Solana. Teams like AgentMail and Steel are already using Sponge.
Signals & Private Analysis
The team's deep Stripe pedigree, specifically in stablecoins and money movement, signals likely development of stablecoin-native settlement rails and cross-border agent payment corridors. GitHub and developer community signals point toward SDK development in TypeScript and Python for rapid agent framework integration. There are strong indicators of upcoming compliance automation tooling (KYA, Know Your Agent), hybrid fiat-crypto escrow for agent-to-agent transactions, and a likely marketplace layer where agents can discover and transact with service providers programmatically.
Product Roadmap Priorities
AI agents autonomously route payments across fiat and crypto rails, selecting optimal paths and authorizing transactions without human intervention.
It's like giving your AI assistant its own smart debit card that automatically picks the cheapest and fastest way to pay for anything it needs.
It's like a GPS for money—instead of picking the fastest route to avoid traffic, it picks the cheapest, fastest payment rail to avoid fees and delays.
Real-time ML-driven fraud detection and behavioral risk scoring purpose-built for AI agent transaction patterns, not human spending behavior.
It's like a bouncer who learns what normal AI behavior looks like so it can instantly spot when an agent starts acting suspiciously with money.
It's like how your bank flags your card when "you" suddenly buy 500 gift cards at 3 AM—except Sponge does this for robots, who already buy weird stuff at 3 AM, so the AI has to learn a whole new definition of "normal."
LLMs autonomously parse business API specifications, negotiate service terms, and enable agents to discover and transact with new service providers without human configuration.
It's like your AI agent walking into a store it's never been to, reading the menu, understanding the prices, and placing an order—all by itself in seconds.
It's like if Google Maps, Yelp, and a personal shopper had a baby that could read any restaurant's menu in any language and order your perfect meal before you even knew you were hungry.
Company Overview
Key Team Members
- Jae Choi, Co-Founder
- Eric Zhang, Co-Founder
- Rishab Luthra, Co-Founder
Founder Force Multiplier
All three founders are ex-Stripe Crypto with deep relevant experience: Eric Zhang was Staff SWE at Stripe (5.5 years) who personally built and launched stablecoin payments and the fiat-to-crypto onramp; Jae Choi was SWE at Stripe (6 years) on Crypto, Ledger/Balances; Rishab Luthra was SWE at Stripe Crypto (3.5 years) on Stablecoin Financial Accounts. This is arguably the most qualified possible team to build financial infrastructure for AI agents, as they literally built crypto payments at Stripe.
Funding History
- 2025-2026 | Jae Choi, Eric Zhang, and Rishab Luthra co-found Sponge.
- 2026 | Accepted into Y Combinator Winter 2026 batch.
- 2026 | Seed round (amount undisclosed).
- 2026 | Piloting Sponge Wallet and Sponge Gateway with early adopters including AgentMail and Steel.
Competitors
- Agent Payment Infra: Skyfire (multi-chain agent wallets, enterprise focus), Nevermined (MCP/x402/A2A protocol support), Lava (credit-based agent payments).
- Adjacent Fintech: Stripe (incumbent payments, expanding into crypto/stablecoins), Circle (USDC infrastructure).
- Emerging: Payman (agent-to-human payments), Paid (business payment acceptance), various stealth agentic finance startups.
