Hey there Abner thanks for reaching out and appreciate you jumping Henry. As Henry mentioned integration with Email sequencing does begin at the explorer plan, this means that any of the integration that are part of an email sequencer such as Lemlist, LGM, Instantly, Smartlead and others can only be used on the Explorer plan, whereas any integration that has it's own API available to plug in such as Apollo, Hunter and others becomes available in the Starer plan