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AB Tasty
Google Analytics
Google Marketing Platform
Unbounce
PractiTest
Azure DevOps
A/B testing you'll actually use.

LaunchDarkly
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Unleash
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Growth Book
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Flagship.io
Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Which is more popular?
Based on our record, Flagsmith seems to be more popular. It has been mentioned 13 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | optimizely.com | flagsmith.com |
| Pricing | ||
| Company | Startup from the United States | 2018 |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Optimizely yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Optimizely Review | A/B Testing | Pearl Lemon Reviews
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Optimizely and Flagsmith. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Optimizely is a lower cost entry tool for anyone looking to do website testing. While their pricing structure has changed over the years it still is a pretty cost effective solution. It is easy to get tests up and...
Optimizely is more of a personalization tool but you cannot ignore its A/B testing superiority. It helps you put the face of the most appealing site in front of customers. There’s a lot of things that are good in this...
Optimizely is a well known A/B testing and experimentation tool for both web and mobile. It claims to be built for the enterprise with features like roles, permissions, and two-factor authentication while still...
BlogBackSign inBlogThe 8 best free and open-source feature flag servicesPosted byThe best open-source feature flag tools1. PostHogWhat is PostHog?Supported librariesHow much does it cost?2. UnleashWhat is...
Recommendations tracked on public social media and blogs since March 2021.


Tracking Optimizely since Mar 2021.
Considering all these points, the team at Flagsmith has developed a feature flag management platform Flagsmith and made it open source. The core functionality is open and you can check out the GitHub repository here. I have utilized and... - Source: dev.to / over 2 years ago
Flagsmith - Release features with confidence; manage feature flags across web, mobile, and server side applications. Use our hosted API, deploy to your own private cloud, or run on-premise. - Source: dev.to / about 4 years ago
Flagsmith is written in Django and is open source as well: https://flagsmith.com. Source: over 4 years ago
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Unleash is an open-source feature management platform. We are private, secure, and ready for the most complex setups out of the box.
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