What do you recommend to use in SharePoint Online to create Complex Forms? Right now we are using Nintex On-Premise to all of current workflows and since we already have SPO we need to move/migrate our Workflows to Online.
In the long run, in SharePoint online, the recommendation is PowerApps for forms development and Power Automate (Microsoft Flow) for the workflows.
Having said these, for SharePoint Online, there are two types of forms and workflow version available from Nintex:
- Nintex Office 365 (separate license needed)
- Nintex Cloud (part of the office 365 tenant, no separate license is needed) - it is like Microsoft Flow and PowerApps which has lots of third party connectors, using that we can connect to any other third application, update or new releases come every two weeks.
To conclude, you can have PowerApps, PowerAutomate, and Nintex Cloud - based on the needs you can choose any of these tools.
Just like Habibur said, if you want to create complex forms, PowerApps and Power Automate(MS flow) will be an option. You can consider them as the new and much more powerful InfoPath and workflow, highly integrated with SharePoint Online.
For migration you may better to contact with Nintex. Per my knowledge there are no tools to migrate Nintex workflows to Power Automate. You may need to keep using Nintex products if you do not want to re-construct all workflows and forms.
Introduction About PowerApps and Power Automate: