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Knockout.js Reviews & Product Details

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Knockout.js Reviews FAQs

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Last updated: Nov 04, 2026

What is Knockout.js, and what problem is it built to solve?

Knockout.js is a JavaScript library for building interactive web interfaces by connecting data models with HTML. Its observable data binding keeps the displayed interface in sync as data changes.

What company sizes and industries is Knockout.js the best fit for?

Knockout.js appears across small-business and mid-market teams, with positive use especially visible in software and IT-related organizations.
  • Company size: Small businesses and mid-market organizations are the most represented segments.
  • Industry: Computer software and information technology and services are prominent industries.

What customer support options does Knockout.js provide, and how do users find the overall support experience?

Support is not described through specific service channels here. The support experience comes across as mixed: tutorials and documentation can help teams get started, but users also encounter gaps in advanced examples and limited community help.

Knockout.js Reviews (48)

Reviews

Knockout.js Reviews (48)

3.9
48 reviews

What do users say?

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Milind S.
MS
Milind S.
Software Engineer
Mid-Market (51-1000 emp.)
"Legacy javascript library"
3.5/5
What do you like best about Knockout.js?

One of the early javascript libraries for building single-page frontend applications. It has some required features for reactivity. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Market accessibility is close to zero. Deprecated and unmaintained. Review collected by and hosted on G2.com.

Aftab A.
AA
Aftab A.
Senior Software Developer
Mid-Market (51-1000 emp.)
"I have been working with Knockout.js from last almost 8 years and I found it a very useful tool."
4/5
What do you like best about Knockout.js?

It's simple lifecycle and lightweight mechanism to be able to create complex dynamic data models easily. It’s a pure JavaScript library as it works with any server or client-side technology. The way HTML DOM elements are linked to the model using a very simple syntax, using a data-bind attribute. Using this feature, it’s made easy to achieve responsiveness. Able to create custom bindings inside data bind. Also Dependency Tracking feature which Tracks data changes in the KO attribute automatically and updates the respective affected areas. It is a best way to build complex UI structures. Knockout implements customized behaviors in just a few lines of code as new declarative bindings for easy reuse. When a change is made in the view model, it automatically changed in the UI and vice versa. It Respect HTML & CSS, it does not bring markup codes into JavaScript code, that is, HTML and JavaScript is completely separated. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

It's not evolving at the pace as compared to other javascript libraries. Hard to use templates that exist on external files, this would make developers hard to co-work Knockout is only for two-way data-binding, automatic UI refresh as data change, this means that we need another library or tool for other needs, such as hash based routing, UI components and so on. Review collected by and hosted on G2.com.

Amjad H.
AH
Amjad H.
Software Engineer
Small-Business (50 or fewer emp.)
"Knockout JS works great with simple and clean underlying data model."
3.5/5
What do you like best about Knockout.js?

How knockout JS modify DOM with clean and simple data-binding attributes. Also, the DI feature and Easy refresh UI mechanism are superb. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Knockout JS is not like Angular or React. It's more like a library rather than a framework. Sometimes it's hard to remember its lengthy attribute name. Also, Its community is not strong enough. Review collected by and hosted on G2.com.

Rudra T.
RT
Rudra T.
Front-End Developer
Small-Business (50 or fewer emp.)
Originally submitted 3/5/2021
Business partner of the seller or seller's competitor, not included in G2 scores.
"Rich JavaScript framework with concise and readable syntax."
5/5
What do you like best about Knockout.js?

automatic UI refresh, clean, readable, rich and responsive display. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Proliferation for view model because it cause the view model to increase dramatically. Review collected by and hosted on G2.com.

Haiming Z.
HZ
Haiming Z.
Software Development Engineer
Small-Business (50 or fewer emp.)
"I would not recommend Knockout.js to any of my colleague"
0/5
What do you like best about Knockout.js?

The Knockout.js does not dependencies which makes it perfect for a small project. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Comparing React.js which I'm working with now, Knockout.js doesn't have an active community and lack of ready to use plugins Review collected by and hosted on G2.com.

Orkhan H.
OH
Orkhan H.
Software Developer
Small-Business (50 or fewer emp.)
"I was use knockout js about 5 years ago,but now I'm using vue js"
3/5
What do you like best about Knockout.js?

Knockout js is my first single page application experience Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

I think the syntax of the Knockout remains weak compared to other frameworks. Review collected by and hosted on G2.com.

Prerna R.
PR
Prerna R.
Software Developer
Small-Business (50 or fewer emp.)
"I is a very useful learning experience, must try for all."
5/5
What do you like best about Knockout.js?

the language is really easy to understand, makes you grasp the concept easily. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

The contents should be more deep into the topic Review collected by and hosted on G2.com.

Verified User in Construction
IC
Verified User in Construction
Small-Business (50 or fewer emp.)
"Good framework but very less supportive community documentation"
2.5/5
What do you like best about Knockout.js?

Almost everything that I have worked is based on observables. Easy to learn basics when you are new to front end frameworks Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Very little support for advanced UI interaction. Community support is not available mostly. No good documentation with various examples. Review collected by and hosted on G2.com.

Verified User in Information Technology and Services
CI
Verified User in Information Technology and Services
Mid-Market (51-1000 emp.)
"Knockoutjs has been very helpful for me in creating and managing dynamic web applications"
4/5
What do you like best about Knockout.js?

Observables are the best part for me using knockout. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

Nothing in knockout to dislike.

I think there are some functions which are in lodash library and can be incorporated in knockout Review collected by and hosted on G2.com.

Verified User in Computer Software
AC
Verified User in Computer Software
Mid-Market (51-1000 emp.)
"Knockout.js is a very good library, but now is JS frameworks time."
2.5/5
What do you like best about Knockout.js?

I like declarative binding, observables. Review collected by and hosted on G2.com.

What do you dislike about Knockout.js?

What is least helpful about Knockout.js? What are the downsides of using Knockout.js? Review collected by and hosted on G2.com.

Questions about Knockout.js? Ask real users or explore answers from the community

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GU
Guest User

What is Knockout.js used for?

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GU
Guest User
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Last activity almost 4 years ago

How do I download knockout JS?

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