I like how easy it is to just have an endpoint we can call to schedule notifications. It's especially beneficial when dealing with notifications that need to be sent in the future. Within those workflows, it feels pretty easy. Review collected by and hosted on G2.com.

I think that I would like to be able to use codebase interface, maybe through the CLI. Handling a notification engine, we pretty much have to build that part of the infrastructure ourselves. I would like to have more of a condition-based event approach. Let's say that whenever an event happens, then look for other conditions to see if the user met that requirement so that we can build an identification engine. Right now, I don't know if it's possible to do. So that part of the infrastructure we built ourselves. Review collected by and hosted on G2.com.

Knock has been a boon for us. It’s easy to set up, powerful, and clearly built for both PMs and engineers. We started out manually coding every email in our SaaS app, but once we needed multi-channel support and more complex workflows, it became unmanageable. I randomly came across Knock on Twitter, checked out the demo, and with just me (a product lead) and one engineer, we had over 10 workflows running across email, SMS, and in-app within weeks. Review collected by and hosted on G2.com.

There is nothing I dislike. I would highly recommend this. Review collected by and hosted on G2.com.

I lead the implementation of Knock in our stack, and it’s one of those rare tools that gets the balance right between being developer-friendly and marketing-team friendly.

From an engineering perspective, my job is to simply wire up triggers and send data from our app. From there, our copywriters and marketers can own the templates without needing me in the loop. That separation of concerns has been a huge productivity boost.

Knock has also gone far beyond just "send a notification." Features like schedules and delayed notifications mean we don’t have to waste time setting up cron jobs ourselves. The logging is excellent too, it’s easy to debug and see exactly what’s happening.

The development workflow is one of the standout parts for me. Multiple environments, the ability to incrementally push changes, and even seeing commit diffs on workflows, it feels like Knock was built with real engineering teams in mind.

Other highlights:

- The free tier was more than generous enough to cover our POC.

- Sandboxing notifications helps us avoid burning through third-party usage.

- Support has been unreal, even from the other side of the world, questions in their Slack community get answered quickly.

- The workflow builder is incredibly powerful, with branching, batching, conditions, and customisations that make it easy to design complex flows that were simply not possible when we were using a different product and we had to add a bunch of messy workarounds

Ultimately, Knock is a tool that knows what it’s good at and does that really well. That’s exactly what I want as an engineer, and it’s exactly how I’d describe our experience with it. Review collected by and hosted on G2.com.

I would really like to be able to access the data for more than just 10 activities in my templates.

Being able to edit delayed workflows instead of cancelling them and triggering them again would also be helpful.

But that is splitting hairs. Review collected by and hosted on G2.com.

Knock has been our go-to for all of our notifications and has been our trusted service in communicating alerts and messages to our customers. Integrating with Knock was a breeze and their documentation has been good enough for anyone to easily pick up. In the few times I had emailed for support, I have always gotten excellent support from them and currently I can't see a world where I wouldn't use them. Review collected by and hosted on G2.com.

** The analytics page needs to provide more information with better filters ** The new UI is not as intuitive as the old one when it comes to selecting environment ** Would be nice to have a sandbox mode per workflow instead of a channel ** Review collected by and hosted on G2.com.

We've been using Knock since its early days, and it is one of the best infrastructure messaging tools out there. Its intuitive setup and seamless integrations make it incredibly easy to get our own tools up and running quickly. The documentation is comprehensive and easy to navigate, and the customer support team is outstanding—responsive, knowledgeable, and among the fastest we've encountered. Review collected by and hosted on G2.com.

One of our key feature requests is for ticketing integrations—as a customer‑facing company, this would help us avoid the constant cycle of building custom ticketing solutions, and let us define a ticket once and see it across all our apps. We’d also like more environment decoupling. Currently, promoting changes requires applying them in all environments, which becomes overly complex for heavy customisations and dedicated or on‑prem deployments. Review collected by and hosted on G2.com.

Knock makes it easy for us to manage notifications. We primarily use it for Teams, Slack and emails, but its real value is that it decouples our notification system from our codebase. This gives our product team the power to move at their own pace, fixing bugs and improving notification models and messages without depending on engineering. Iterating is as simple as a click, which has significantly accelerated our ability to test, adjust, and improve the experience.

Customer support has been excellent. They set up a dedicated Slack channel for us, and every time we had bugs or questions, we were able to talk directly with their team. Most of the time we got answers or fixes extremely quickly, which has been a great experience. Review collected by and hosted on G2.com.

The product can feel a bit complex at first because of the wide range of features and possibilities. There’s some trial and error involved in figuring out what you want to achieve and how to get there, which can feel a little overwhelming in the beginning. However, once you understand the logic and know your way around, it becomes very fast to use.

Duplicating workflows, creating new ones, or adapting to the email templating language may take some initial effort, but once you get past that learning curve, it’s extremely powerful. The flexibility and depth of customization make it a tool that really pays off once you’re familiar with it. Review collected by and hosted on G2.com.

The devrel team at Knock and the community space they've created is excellent and very responsive.

The Audit logging features are the best of any developer integration I've ever used. Our ability to debug specific issues is unparalleled.

Batching of notifications was the killer feature that brought me to Knock and it does enough of what I need to keep me very happy. Review collected by and hosted on G2.com.

Sometimes the documentation on the SDKs is a little outdated or the examples incomplete so you HAVE to rely on the devrel team. Review collected by and hosted on G2.com.

I think the best feature of Knock is the observability. It allows us to drill down into the specifics of each notification for each user or channel. This level of detail is really, really useful especially when something goes wrong or a user reports not receiving notifications. Our support team can leverage this feature and solve issues pretty easily without the engineers having to dig deep into it. Overall, I also find the documentation, UI, and dashboard to be great, and the support we have received is excellent. Review collected by and hosted on G2.com.

No complains! Review collected by and hosted on G2.com.

I love using Knock for its excellent developer experience, making it easy for me to trigger Slack, Email, and in-app notifications. The simple and intuitive UI is greatly appreciated, especially for non-technical team members who manage what notifications look like. Knock offers a straightforward way to handle both notifications and workflows. Additionally, we find it valuable for managing announcements, such as new feature releases. It's been the first platform we've used for nearly three years, and we've grown with it, thanks to the ease of setup and integration. The API is simple, and I appreciate the custom React components provided, making the developer's work much more seamless. Review collected by and hosted on G2.com.

I think analytics could be a bit better. I'd love to know how many flows get merged or if I extended the merge timeout how more notifications would get merged. Review collected by and hosted on G2.com.

I enjoy using Knock. It's a great tool. What I've liked the most is the customer service. The level of service they've provided has been incredible. I'm able to reach out to them via Slack and get a response almost immediately from an actual human that has always been able to help me solve my problems. Review collected by and hosted on G2.com.

I think the way that you create the email using HTML, which I'm vaguely familiar with, hasn't always been the easiest. This is a small issues and pretty insignificant. Review collected by and hosted on G2.com.