Flagsmith

Pros: 1. It is straightforward to use and helps tremendously in releasing features.
2. The UI and UX of the software is well-designed and implemented.
3. The management of features is easy and does not consume a lot of time.
4. It comes with an affordable price tag.

Cons: It is not widely used and because of that, there is no strong community support available for this software.

Overall: Installing and setting up is easy and straightforward. It supports rest API and that makes the task a lot easier.

Pros: * Cheap compared to other solutions
* Very good support
* Quick to fix bugs
* Nice interfaces
* Tons of options to do almost anything with feature flags and remote configurations

Cons: * Not used by a majority of people yet so small community
* The Open Source options is hard to install

Overall: We have started using this software at the very beginning. I was looking for a cheaper alternative to Launch Darkly, and if possible an Open Source one. I find both with Flagsmith.

I tried to install on our own server the back-end and front-end but without success. Then, I tried the hosted version (called Bullet Train at the time). It was so easy, so cheap and so awesome, we subscribe instantly.

Since we were early adopters, there was still a couple of bugs but developers were easy to join and VERY quick to fix them.

There was a ton of feature added every month and was always excited when I received an email with the new features. It's been at least 2 years since we use this product and we can't live without it.

Pros: Easy to implement in code.
Easy to use for product team.
Inexpensive.
Multiple projects and for each, multiple environments (e.g. Staging, Development, Production).
End user segmentation into groups.
Excellent support.

Cons: I have yet to find something that needs to change in their solution. Note that some things are very hard to wrap in a feature toggle. For example DB schema changes which are not backwards compatible. This is not a problem specific to FlagSmith but rather a generic problem with these types of solutions.

Overall: Setting up the solution was very easy. We wrap almost every feature in a feature toggle, which makes deployment less risky since we can turn a feature off if we notice some side effects. Further we can also do some tests *on production* by exposing a feature to only some specific users!
Finally, their support is really amazing.

Pros: Easy to set up, easy to implement, easy to manage. I've used several feature flag tools both free and premium. Flagsmith is the easiest to use and the most robust, especially in their entry-level tiers. It was an easy decision!

Cons: I think it would be nice if we could send JSON objects instead of a string. For us, we could benefit from sending a more complex object as the value property. That being said, we were able to overcome the issue by parsing the string within our app. Honestly, it's just a minor, minor inconvenience for an otherwise great platform.

Overall: Overall, I'm kind of upset with myself for not finding Flagsmith earlier. As a startup that is just starting to get into feature flags, etc., It was incredibly easy and cost effective to go with Flagsmith. Definitely would recommend!

Pros: UI is clean and easy to use.
Extensive SDKs with support for various languages.
A/B Testing and throttling.
REST API support.
Webhooks support to trigger actions on toggle.

Cons: Self Hosted setup is tricky to get right.
No metrics graphs.
Permissions are a bit clunky.

Overall: Overall, our team is happy with Flagsmith. We have account managers managing features, while we have engineers creating/deprecating features. We even have designers create A/B testing experiments. It's a great piece of software and has great UX for anyone. Flagsmith is an inexpensive solution and even free if you self host it. Support and feedback has been great and the team is open to suggestions.