Zapier is an automation platform founded 2011, positioned as "business version of IFTTT" — more professional, feature-rich, targeting salaried workers vs. IFTTT. Core scenarios: (1) Marketing uses Zapier to connect Typeform submission → auto-add to Mailchimp + Slack notification; (2) Sales connects Calendly meeting → auto-add Salesforce + send welcome email; (3) Customer service connects Intercom ticket → auto-add ClickUp task for engineering team. 7000+ app ecosystem is Zapier's moat — every SaaS wants to integrate with Zapier because users expect "I can use Zapier to chain it with other tools". Platform API lets SaaS companies implement "integrating into Zapier" — write Triggers (notify Zapier when your service has events) and Actions (Zapier calls your service to do things). Strict review but once listed, enjoys Zapier user traffic. Competitors: IFTTT, Make (Integromat), n8n, Pipedream — but Zapier ecosystem largest.