AI and automation tools
212 tools in 26 categories, 5 of them open source. Free plans and starting prices come from each vendor's own pricing page, checked 21 October 2026.
Adobe Acrobat Sign
Adobe's e-signature service, sold inside Acrobat for teams plans or as custom-priced Acrobat Sign Solutions
signNow
E-signature plans priced per account with unlimited users, capped by signature invites
Zoho Sign
Digital signature app from Zoho with a free 5-envelope plan, per-user plans and $0.50-per-envelope API pricing
BoldSign
E-signature app and API from Syncfusion with a free 25-envelope plan and unlimited envelopes on Business