Direct answer

What is the cheapest all-in-one church software?

"Cheapest" should include subscription, required add-ons, onboarding fees, and donation processing — not only the headline monthly price. Modular suites can start low and rise quickly as you add apps. Bundled stacks can discount modules but still carry long contracts. Ekkle publishes $149.99/mo for the full platform listed on meet.ekkle.app, with no Ekkle platform fee on top of Stripe processing for giving. Model your own giving volume before you decide.