5 open-source tools to track wallets like a pro:

1. Arkham Intel – on-chain intel platform, tag wallets, follow smart money
2. Rotki – privacy-first portfolio tracker, local data, no KYC
3. Blockscout – block explorer for EVM chains, full tx history
4. DeBank OpenAPI – multi-chain portfolio API, DeFi positions included
5. Breadcrumbs – forensics-grade wallet analysis, follow the money

All on GitHub. Self-host or fork. Stop relying on closed platforms.