I've developed an extremely beneficial tool for umrah/hajj agencies, wa lilahil hamd. Regarding marketing/outreach: i have no idea what aqeedah/manhaj the agencies have, the ones I will sell my product to. Can I freely do outreach to every agency or is aqeedah/manhaj an issue regarding this?

Ustadh AbdulAziz al-Haqqan

No need to know their aqeedah etc. and you can carry on with your business in sha'a Allah.