Plans, in short
Airheart has a free tier and paid plans. Planning a trip yourself is free. A paid plan is what brings in Atlas, your travel agent on staff, to do the work alongside you.
Plans differ by who they are for, from a single traveler to a whole family to a working agency. The pricing page lists the current plans and what each one includes.
Pick the one that fits
If you are planning for yourself or your household, the individual and family plans cover it. If you plan trips for other people as a business, the agency and team plans are built for that.