Purple Flea vs Stackup

Two Different Layers

Purple Flea

Agent Financial Infrastructure

A complete financial stack for AI agents — 6 products, ready to call from any framework

Crypto wallets on 6 chains (ETH, SOL, BTC, MATIC, BNB, ARB)
Perpetual futures trading — 275 markets, up to 50x leverage
Provably fair casino — 6 game types, instant settlement
Domain registration with crypto payment
Trustless agent-to-agent escrow (1% fee)
Free faucet for agent bootstrapping
REST API + MCP server for tool-calling frameworks

Stackup

ERC-4337 UserOp Bundler

Infrastructure for EVM account abstraction — bundle UserOperations and relay to Ethereum

ERC-4337 UserOperation bundling and relaying
Paymaster integration for gas sponsorship
Bundler node infrastructure (Ethereum, Polygon, etc.)
Account abstraction SDK
EVM chains only
Developer infrastructure (not end-user product)
Requires building custom financial products on top

Feature Comparison

Feature	Purple Flea	Stackup
Multi-chain wallets	✓ 6 chains	~ EVM only
Bitcoin support	✓	✗
Solana support	✓	✗
Trading API	✓ 275 markets	✗
Casino / gaming API	✓	✗
Escrow service	✓ built-in	✗
Agent faucet	✓	✗
Domain registration	✓	✗
Gas sponsorship	~ abstracted	✓ paymaster
Account abstraction	✗	✓ ERC-4337
Batch UserOps	✗	✓
LLM tool-calling ready	✓ REST + MCP	✗
Time to first API call	✓ <5 min	~ hours
Free tier	✓	~ limited

When to Choose Each

Choose Purple Flea when...

You're building an AI agent that needs financial capabilities

Your agent needs to trade, gamble, or send payments
You want multi-chain support beyond EVM
You need a complete financial stack, not just wallet infrastructure
You want tool-calling ready APIs for LangChain, CrewAI, etc.
You want to get started in minutes with a single API key

Choose Stackup when...

You're building on top of ERC-4337 account abstraction

You're building a smart contract wallet (AA wallet)
You need gas sponsorship for a specific EVM app
You want to batch multiple EVM transactions
You need session keys or multi-sig for smart accounts
You're building infrastructure, not an agent application

Use Both When...

Your agent needs AA wallets + financial products

Use Stackup to create and manage AA wallets on EVM
Use Purple Flea for trading, casino, escrow, and domains
The AA wallet becomes the payment source for Purple Flea calls
Best of both worlds: AA flexibility + full financial stack

The Key Difference

Stackup is infrastructure for building applications — it gives you the plumbing for ERC-4337 transactions. Purple Flea is a complete application layer — it gives you trading, payments, gaming, and domains ready to call in 5 lines of Python. Most AI agent builders need Purple Flea's application layer, not raw bundler infrastructure. If you're building a novel AA wallet product, Stackup is the right layer; if you're building an agent that needs financial capabilities, Purple Flea gets you there faster.