HotDocs is described as 'The most powerful and flexible document assembly tool available, allowing you to automate the generation of even the most complex documents' and is an app. There are more than 10 alternatives to HotDocs for a variety of platforms, including Web-based, Windows, Self-Hosted, Microsoft Word and SaaS apps. The best HotDocs alternative is LaizyDoc. It's not free, so if you're looking for a free alternative, you could try DocuGenerate or docassemble. Other great apps like HotDocs are Windward Core - Document Generation Component, Knackly, Woodpecker and TheFormTool.
If you are looking for an alternative to some of the more expensive document assemblers this is absolutely the best one out there. It does require the use of simple coding or you alternatively use the paid GUI interface which is inexpensive and very easy to use. The company is new and small and very attentive to users including online and phone technical support. The software specializes in legal templates but the system can be adapted to just about anything.