Knock alternatives
Providers that compete with Knock on at least one of: Notifications
Notification infrastructure with workflow engine.
Switching as teams choosing a transactional API
Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.
Knock does not cover operating track record, and none of the alternatives below close that gap either. If it is a hard requirement, the shortlist has to widen beyond this category.
ranked for teams choosing a transactional API
- 01
Novu
Notifications Self-hostedOpen-source notification infrastructure.
Matches Knock on every priority weighed here, so the decision is price and preference.
30,000 events/mo on cloud, free self-hosted · $250/mo (Business cloud) - 02
Courier
NotificationsNotification infrastructure with visual journeys.
Gives up idempotency keys against Knock and adds nothing on these priorities.
10,000 sends/mo · $95/mo (Business) - 03
Engagespot
NotificationsMulti-channel notification infrastructure with predictable event pricing.
Gives up idempotency keys against Knock and adds nothing on these priorities.
10,000 event triggers/mo on Launch · $250/mo Growth for 250,000 event triggers - 04
MagicBell
NotificationsNotification inbox and multi-channel delivery platform.
Gives up idempotency keys against Knock and adds nothing on these priorities.
1,000 deliveries/mo on Builder · $249/mo Startup for 50,000 deliveries - 05
SuprSend
NotificationsNotification workflow API with preferences, batching, and multi-tenant options.
Gives up idempotency keys against Knock and adds nothing on these priorities.
10,000 notifications/mo · $110/mo Essentials for 50,000 notifications
Knock and its alternatives, side by side
Columns are the priorities teams choosing a transactional API weigh, in order. Knock is the first row so the trade in each direction is readable at a glance.
| Provider | Idempotency keys | Webhooks | Event stream | Operating since | Suppressions API | Best published rate per 1,000 | Batch sending | SDKs |
|---|---|---|---|---|---|---|---|---|
| Knock | Yes | Yes | Yes | 2021 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, elixir, java, dotnet |
| Novu | Yes | Yes | Yes | 2021 | Yes | Tiers not published in comparable form | Yes | node, python, go, php, java, dotnet |
| Courier | No | Yes | Yes | 2019 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, java |
| Engagespot | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node |
| MagicBell | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node |
| SuprSend | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python, go |
Nothing on this list is a clean upgrade: every alternative trades something away against Knock on these priorities, so the choice depends on which of them the build actually needs.