{"data":{"slug":"knock","name":"Knock","tagline":"Hosted notification workflows; Developer free to 10k messages/mo","category":"notifications","categoryName":"Notifications","url":"https://knock.app","github":"https://github.com/knocklabs","pricing":"freemium","hook":"Knock is the managed cross-channel notification fabric when Novu is the self-host twin and you refuse to own the inbox plumbing.","whatsGood":"Workflows + preferences + in-app feeds/guides across email, push, SMS, Slack, Teams, Discord. Developer $0: 10k messages/mo, unlimited workflows/channels/members, batch/delay, multi-tenancy, Google SSO. SDKs + CLI. Charge only for messages sent (not failed/bounced triggers).","theCatch":"Closed-source SaaS — not Novu MIT self-host. LOUD: Starter jumps to $250/mo (50k messages). Downstream SendGrid/Twilio/etc still bill you. HIPAA/SAML/SCIM are Enterprise. Free path is Developer tier only.","verdict":"Hosted notification workflows. Free to 10k msgs; Starter $250. Not self-hostable.","addedAt":"2026-09-04","featured":false,"domain":"Comms","subSpecialty":"Notifications","capabilities":["workflows","push","in-app"],"surfaces":["Self-host","Hosted"],"ecosystem":["Multi-platform"],"licenseModel":"Freemium","githubStars":null},"related":[{"slug":"ntfy","name":"ntfy","tagline":"HTTP pub-sub notifications you can curl from cron"},{"slug":"novu","name":"Novu","tagline":"MIT notification workflows with a real 0 USD Cloud"},{"slug":"listmonk","name":"Listmonk","tagline":"AGPL-3.0 self-hosted newsletters and transactional mail"},{"slug":"apprise","name":"Apprise","tagline":"BSD-2-Clause CLI that talks to a hundred notifiers"},{"slug":"gotify","name":"Gotify","tagline":"MIT self-host push server; Android-first, no ntfy.sh twin"}],"links":{"self":"/api/gems/knock","html":"/gems/knock","markdown":"/gems/knock.md","category":"/api/gems?category=notifications","categoryPage":"/stacks/notifications"}}