The best CAD alternative to OpenSign is Adobe Acrobat Sign. It's not free, so if you're looking for a free alternative, you could try eSignly.com or XolidoSign. If that doesn't suit you, our users have ranked more than 50 alternatives to OpenSign and 13 are CAD Software so hopefully you can find a suitable replacement. Other interesting CAD Software alternatives to OpenSign are eSign Genie, Legalesign, RightSignature and Signority.
OpenSign alternatives are mainly CAD Software, but if you're looking for
E-signature Tools or Digital Signage Software you can filter on that. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to OpenSign.