DNSSEC support out of the box
As Atomia utilizes open source AtomiaDNS and as such DNSSEC is by default enabled in Atomia DNS.
At this moment not yet all of ccTLD and gTLD support DNSSEC. For all registries that do support it, Atomia supports it as well.
It is up to you to either enable or disable DNSSEC as functionality system wide. If enabled, your end customer will have option to enable or disable DNSSEC for their own domain through Hosting Control Panel. Of course you may prevent your end customers disabling DNSSEC if you may wish so.
More information about DNSSEC can be found here.