---
title: "Ably vs Knock: Which is Better in 2026? | App Stack Builder"
description: "Ably vs Knock compared for 2026 — pricing, free tiers, features, pros & cons. See which notifications & realtime tool is the better fit for your startup."
source: https://appstackbuilder.com/compare/ably-vs-knock
retrieved: 2026-09-11
---

Notifications & Realtime

# Ably vs Knock: Which is Better in 2026?

Choosing between [Ably](https://appstackbuilder.com/tools/ably) and [Knock](https://appstackbuilder.com/tools/knock)? Both are popular notifications & realtime tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both are solid notifications & realtime options. Ably is cheaper to start, but the right choice depends on the specific features and integrations you need.

## Ably vs Knock — Side by Side

|                | Ably                                            | Knock                                                 |
| -------------- | ----------------------------------------------- | ----------------------------------------------------- |
| Category       | Notifications & Realtime                        | Notifications & Realtime                              |
| Pricing        | Free · paid from $29/mo                         | Free · paid from $250/mo                              |
| Starting price | Free tier available                             | Free tier available                                   |
| Free tier      | ✓                                               | ✓                                                     |
| Rating         | 4.5                                             | 4.6                                                   |
| Best for       | Notifications & Realtime — realtime, websockets | Notifications & Realtime — in-app-feed, multi-channel |

## Pros & Cons

A

[Ably](https://appstackbuilder.com/tools/ably)

* ✓Ordering and delivery guarantees
* ✓Connection state recovery after drops
* ✓Global edge network
* ✓Generous free tier
* ✗Usage billed on top of the flat fee
* ✗More complex than Pusher for simple cases
* ✗Big jump from Standard to Pro

K

[Knock](https://appstackbuilder.com/tools/knock)

* ✓Best-in-class batching and digests
* ✓Preference centre handles the hard cases
* ✓Workflow editor non-engineers can use
* ✓Unlimited team members on every tier
* ✗$0 to $250 is a very big step
* ✗No self-hosted option
* ✗Message overages add up quickly

## Key Features Compared

### Ably

* ✓2,500 messages / second
* ✓10,000 connections
* ✓$2.50 / million messages

### Knock

* ✓50,000 messages / month
* ✓2,500 guide active users
* ✓$0.005 per extra message

### Choose Ably if…

* ✓You want a free tier to validate before paying.
* ✓Budget is tight — paid plans start lower ($29/mo vs $250/mo).
* ✓Ordering and delivery guarantees
* ✓Connection state recovery after drops
[Ably review & pricing ](https://appstackbuilder.com/tools/ably)

### Choose Knock if…

* ✓You want a free tier to validate before paying.
* ✓Best-in-class batching and digests
* ✓Preference centre handles the hard cases
* ✓Workflow editor non-engineers can use
[Knock review & pricing ](https://appstackbuilder.com/tools/knock)

## Frequently Asked Questions

Is Ably better than Knock?⌄

Both are solid notifications & realtime options. Ably is cheaper to start, but the right choice depends on the specific features and integrations you need.

What is the difference between Ably and Knock?⌄

Ably — Realtime messaging platform with guaranteed ordering, delivery and history — pub/sub, presence and push, on a global edge network. Knock — Notification infrastructure as a service: cross-channel workflows, batching, user preferences and an in-app feed, without running any of it. Both are notifications & realtime tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Ably vs Knock: which is cheaper?⌄

Ably pricing: Free · paid from $29/mo. Knock pricing: Free · paid from $250/mo. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Ably or Knock?⌄

In our catalog, Ably rates 4.5 out of 5 and Knock rates 4.6 out of 5, so Knock has a slight edge on reviews.

See more options in our guide to the [best notifications & realtime tools for startups](https://appstackbuilder.com/categories/notifications).

## Still not sure which to pick?

Get a free, AI-powered tech stack — including the best notifications & realtime pick for your budget and team — in 60 seconds.

[Build my stack free ](https://appstackbuilder.com/)