# OutboundOS > Multi-workspace branching email journeys sent through your own SMTP. One-time lifetime pricing — no seat treadmill. OutboundOS is a product of AppUnik LLC. Operators design journey graphs (waits, sends, branches, stops), keep contacts and templates inside dedicated workspaces, and deliver mail via SMTP credentials they supply. ## Product - Home: https://outboundos.tech/ - Pricing: https://outboundos.tech/pricing - Blog: https://outboundos.tech/blog - Sign in / sign up: https://outboundos.tech/auth ## Docs for agents - Full product + blog index: https://outboundos.tech/llms-full.txt - Sitemap: https://outboundos.tech/sitemap.xml - Blog RSS: https://outboundos.tech/rss.xml ## Optional - Terms: https://outboundos.tech/terms - Privacy: https://outboundos.tech/privacy - Support: mailto:hello@outboundos.tech ## Key facts - Sending: customer-owned SMTP (OutboundOS does not send from shared OutboundOS IPs as your ESP) - Packaging: Signal / Dispatch / Cadence / Command one-time tiers - Isolation: contacts, templates, journeys, and analytics are workspace-scoped - Audience: founders, outbound teams, and agencies running multiple brands or clients