| ChatGPT | 50M paying subscribers; 900M weekly active users | Reported public metric, February 2026 | Largest paid and usage signal in the category. Do not compare directly to smaller bundle tools. |
| Gemini / Google AI | 750M Gemini app monthly active users; 325M Google subscription-service users | Reported public metrics, not Gemini Advanced subscribers | Huge ecosystem reach, but Google does not publish a clean Gemini paid-subscriber count. |
| Claude | 245M unique monthly visitors; 300K+ business customers reported for Anthropic | Visitor and business-customer metrics, not consumer paid subscribers | Strong scale signal, but Claude Pro/Max subscriber count is not public. |
| Perplexity | 100M+ monthly active users; $450M+ ARR reported | MAU and revenue run-rate, not exact paid subscribers | Strong search/agent adoption, but Pro/Max subscriber count is not public. |
| MultipleChat AI | Around 250K subscribers | Estimate | Meaningful all-in-one AI bundle scale; use as an estimated subscriber figure, not an audited public filing. |
| ChatHub, TypingMind, Monica, Sider, Merlin | No reliable public subscriber count found | Unknown / not consistently disclosed | Judge by workflow fit, model access, pricing and limits instead of popularity claims. |