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 four plans on meet.ekkle.app — Free, then $49, $99, or $149/mo for the whole church — with no per-member fees and no Ekkle platform fee on top of Stripe processing for giving. Model your own giving volume before you decide.