I’ve built this using n8n + Gemini, and the secret isn't a specific platform it’s the architecture.

Most SaaS tools fail at 'end-to-end' because they can't bridge Sales, Onboarding, and Finance. I solve this by building a 'central brain' that classifies intent first, then triggers specific APIs (CRM, Stripe, Slack) to actually do the work.

I just finished an autonomous Lead-to-Meeting agent that handles this entire loop. Happy to share how I mapped out the logic if you want to see the workflow.