In wiki it is showing as free,
But, in the homepage, thee is only free trial.
https://www.capterra.com/p/161572/NextCloud/#about
Can you please guide me with links.
That isn’t Nextcloud’s home page, this is https://nextcloud.com.
There is a free version which you can use as you wish, but maintain yourself. The prices on the page you link to, refer to the Enterprise version.