Knock
Notification infrastructure with cross-channel routing, batching and user preferences.
why this verdict
Keep paying — Anthropic has not replaced it
Anthropic's version overlaps, but does not finish the dev tools job, so this one still earns its $250/mo.
- A named launch, not a vibe named, unlinked
- Coding agents writing notification fan-out logic that a dedicated service used to justify. Anthropic, November 4, 2025 — no announcement link recorded yet.
- How much of the job it covers not the job editorial call
- Parts of it. The job still needs the tool to get finished.
- Is there a free way to do it? yes
- 2 of 3 listed replacements have a usable free tier: Novu and OneSignal.
- What the call is worth $3,000/yr
- $250/mo at the entry paid tier — $3,000 a year per seat.
- Threatened by
- Anthropic
- Since
- November 4, 2025
- List price
- $250/mo
- Per year
- $3,000
The backstory
Knock handles the part of notifications nobody wants to build twice: routing one event to email, push, Slack and in-app, honouring quiet hours, batching digests and storing per-user preferences. An agent can write the fan-out, but preference management and delivery observability are stateful services rather than code. As AI agents start generating events on their own schedule rather than a human's, controlling notification volume becomes the product, which is the thing Knock is actually selling.
Escape hatches
Open-source notification infrastructure you can self-host
novu.co open_in_newSimilar multi-channel routing with a template studio
courier.com open_in_newPush-first with a large free tier
onesignal.com open_in_new2 of 3 replacements have a usable free tier.
