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CEX holds user funds (custodial), requires MSB + MTL licenses, offers fiat on/off-ramps, and costs $280,000–$680,000 to build — ideal for retail non-crypto users. DEX lets users hold their own funds, has lower regulatory requirements, no fiat integration, and costs $90,000–$250,000 — ideal for crypto-native DeFi users. Compliance costs: CEX $200K–$500K/year, DEX much lower.
CEX vs DEX Feature Comparison
| Feature | Centralized Exchange (CEX) | Decentralized Exchange (DEX) |
|---|---|---|
Custody | You hold user funds | Users hold their own funds |
Regulatory requirement | MSB + MTL licenses | Varies (possibly none for protocol) |
KYC/AML | Required | Optional (for regulated versions) |
Fiat on/off ramp | Native (bank integration) | Requires external on-ramp |
Order book | Order book matching | AMM or off-chain order book |
Liquidity model | Market makers + users | Liquidity providers (LPs) |
Development cost | $280,000–$680,000 | $90,000–$250,000 |
Ongoing compliance cost | $200,000–$500,000/year | Much lower |
Revenue model | Trading fees (predictable) | Protocol fees (variable) |
Best for | Retail crypto users (non-DeFi) | Crypto-native, DeFi users |
When to Build a CEX
- You have or are pursuing US money transmitter licenses
- You are building for retail users who are not crypto-native (they want bank-like UX)
- You have a geographic market where DEX adoption is low
- Your users primarily want to trade crypto-to-fiat
- You want a traditional business model with predictable revenues
When to Build a DEX
- Your users are already DeFi-native
- You want to avoid the $500K+/year regulatory compliance overhead
- Your differentiator is a specific trading mechanism (novel AMM, specialized pairs)
- You are building for a specific DeFi ecosystem (token pairs within a protocol ecosystem)
- You want to create Protocol-Owned Liquidity as a business model