How can I migrate from Disqus to Epoch?
Epoch uses fully native WordPress commenting, so all of your comments should be synced from Disqus to WordPress before removing Disqus.
Syncing of comments from Disqus to WordPress happens automatically by default. If you're in doubt as to whether all of your comments have been synced, the Disqus Conditional Load plugin offers the ability to download your Disqus comments and store them locally in WordPress.
As a safeguard, we recommend that you backup your database before removing Disqus.
Once you are confident that your comments have synced, deactivate the Disqus plugin.
Delete Disqus from your list of plugins.
Once that's done, you can go ahead and download/install Epoch.