Which no-code automation platform can connect our CRM, email marketing, and accounting tools?

We're a 12-person B2B software company, and our lead handoff runs on manual work: demo form submissions land in a spreadsheet, get copied into our CRM by hand, and only sometimes make it into an email follow-up sequence before the next day. The result is leads sitting untouched for hours, duplicates, typos, and the occasional lead falling through entirely, even though we close far more of the ones we reach within the first hour. The same fragility hits after a deal closes, when someone has to manually create the invoice, update the deal stage, and start onboarding. We don't have a developer, so which no-code automation platform can reliably connect these tools and run these workflows on their own, and what tradeoffs should we weigh before committing