PaaS & app hosting

4 SaaS · open-source self-host alternatives in this vertical

Every SaaS in this category, paired with its primary open-source self-host alternative. Each link drills into the full comparison page (license, setup time, monthly cost, migration sketch). Managed-hosting picks for self-hosters: managed Coolify, CapRover, Dokku, or Supabase for self-hosted apps.

Firebase Backend-as-a-service (auth + DB + storage + realtime)

Primary self-host alt: Supabase · supabase/supabase · Apache-2.0 · 20min docker-compose (the official self-host bundle)
Heroku App platform / git-push deploy

Primary self-host alt: Dokku · dokku/dokku · MIT · 15min (single-line install on a fresh Ubuntu 22.04 VPS)
Vercel Frontend hosting / serverless deploy

Primary self-host alt: Coolify · coollabsio/coolify · Apache-2.0 · 10min (single-line bash installer)
Zapier Workflow automation / iPaaS

Primary self-host alt: n8n · n8n-io/n8n · Sustainable Use License · 10min docker-compose