The AI altcoin sector sits between $18B and $22B in total market cap right now. Most people cannot name the top 10. Here is the full ranking by market cap as of late April 2026: THE INFRASTRUCTURE LAYER $TAO → $2.69B | Decentralised ML networks with real subnet usage. The undisputed sector leader. $NEAR → $1.75B | AI-optimised L1. The developer ecosystem is quietly building. $ICP → $1.33B | Decentralised cloud compute for AI workloads. $RENDER → $918M | GPU compute layer. Every AI inference job needs this. THE GOVERNANCE AND DATA LAYER $DEXE → $1.21B | Agent governance utility. Underreported in most AI rankings. $FIL → $714M | DePIN storage for AI data needs. The filing cabinet of the AI economy. THE AGENT LAYER $SIREN → $506M | Leading the AI agents subcategory. $FET / $ASI → $458M |The Artificial Superintelligence Alliance play. $VIRTUAL → $453M | On-chain AI agents with engagement mechanics unlike anything else in the space. THE PRIVACY LAYER $VVV → $410M | Venice Token. Privacy-focused AI with real user growth momentum. Total sector market cap: $18B to $22B, depending on inclusions. For context, a single mid-tier traditional tech company trades at multiples of that figure. The sector is in early price discovery, while the underlying technology is advancing faster than the market is pricing in. Save this. Update it monthly. Watch which layer moves first.