Solution Stack — best tool per component

The opinionated pick for each job, plus alternatives and when to switch. Drawn from what both communities actually teach and use + Zoom/Fathom + cal.com + Notion + Retell + Zapier; field-tested adds n8n + GoHighLevel + Upwork/LinkedIn/Heyreach + cold-email infra).

Two guiding principles: 1. Integrate best-of-breed OSS/SaaS; don’t rebuild. (business-os strategy.) 2. Verify price & features “current as of today” before every recommendation. Tool pricing and features drift; this is the version-drift safeguard. Prices below are directional, not quotes.

Files: - stack-table.md — the full component → recommended tool → alternatives → why table. - two-delivery-stacks.md — the two reference architectures (all-in-one vs. composable) and how to choose. - client-one-pager.md — the leave-behind one-pager template for prospects.