Live ranking by how often ChatGPT, Perplexity & Google AI name each brand when buyers ask for the best e-signature software. As buyers move to AI to choose, the brands at the top win the customer.
| # | Brand | AI mention share | |
| 🥇 | DocuSign | 100% | |
| 🥈 | Adobe Sign | 100% | |
| 🥉 | Shachihata Cloud | 100% | |
| 4 | GMOサイン | 80% | |
| 5 | Cloudsign | 80% | |
| 6 | Microsoft Copilot (native) | 20% |