MetaFinancial just shipped their own DEX with a custom-built router instead of forking Uniswap or PancakeSwap. The core innovation is Scam Shield, an onchain token scanner that runs before you sign any swap. It's backed by 80+ audits with binary Passed/Flagged verdicts, no probabilistic guessing.

Tech stack highlights:
• Non-custodial architecture, user signs every tx
• Multichain aggregator that optimizes for net output after fees and slippage, not just display quotes
• Gasless + cross-chain routing where it actually reduces cost
• Real MEV protection and actual slippage calculation, not fake 0.00% UI tricks
• AI copilot queries their internal audit database, not generic LLM hallucinations

Currently in closed beta for their Legion community. Bug bounty implied, public launch after stress testing.