Best features
1. Entity pages
Search 'Binance' or 'Three Arrows Capital' → see every wallet they own, total holdings, transaction flows. Visual web diagram shows relationships.
2. Transaction visualizer
Paste a tx hash → animated diagram shows funds flowing through wallets, contracts, DEXes. Way better than reading Etherscan.
3. Intel Exchange
Bounty system: anyone can post 'find the owner of X wallet' with a reward. Resolved mysteries become public intel. Controversial for privacy reasons.
Free is genuinely enough
Unlike Nansen, Arkham's free tier has most of the value. Pro tier exists but isn't essential.
The privacy debate
Arkham's 'deanonymization bounties' are controversial. Some see it as making crypto safer by exposing bad actors; others see it as a privacy violation. You choose.