FusionAuth

Pros: - The best of feature of using FusionAuth is it is extremely straightforward to implement with any application or account.
- It is completely customizable with JavaScript.
- It makes hosting easy because of its flexibility and features.
- The customer support is best in class, someone is always there to help.
- It is a functional application, with rich user interface and easy installation.

Cons: - In my experience of 1.5+ years of usage of this application, I haven't found a single con.

Overall: Overall, FusionAuth is an easy to implement application that helps in providing extra security to social media accounts and applications.

Pros: - Highly customisable
- Support for many standards
- Free tier and reasonable pricing with various tiers for paid options
- Various guides on migrating from home-grown solutions provided
- Scalable with "just works" multi-node support out of the box
- Very active in supporting issues/feature requests
- Self-hosted options

Cons: - Currently with a multi-node system, downtime is required to upgrade when DB migrations are necessary
- Currently no support for API-initiated SSO
- Some advanced functionality locked behind the higher paid tiers

Overall: It's been a pleasure to use FusionAuth and a great step up from a home-grown solution. The free tier makes this an easy sell to management, with paid options for more advanced features. New features are being added all the time to make it even better.

Pros: Easy to set up and use.
Solid community.
Decent documentation.
Good customization options.
Comprehensive password policy settings.

Cons: Global CORS configuration instead of per application.

Overall: I've found it much easier to work with than Keycloak and Azure B2C while providing the features I need.

Pros: - Complete in the sense of auth related functionalities,
- developer friendly - well defined and documented API,
- builtin, customizable authorization flow views,
- easy to extend - if something is missing, you will most likely be able to implement it with API.

Cons: - Due to java, the service is a bit resource hungry.

Overall: FusionAuth is advertised as developers friendly and it can be felt from the very beginning. The API is very well developed and documented. It can be seen that data entities API endpoints are well thought and give flexibility to implement more and less eccentric auth related functionalities.

When looking for auth solution I have defined a number of requirements (IMO, pretty typical ones), and at the moment, FA was the only sensible self-hosted solution covering them all. Finally, I am very pleased with the choice made. The service covers lots of auth related functionalities and it's actively developed.

The team behind FusionAuth is pretty responsive for any issues or bug notices.

Pros: Really well done. You become productive in no time. It is packed with features for almost any need. Quite intuitive interface. It was just a nice discovery.

Cons: Sometimes some functions are not where you expect, but just enter the operating logic to find them!

Overall: I had to start a project that focused on topics that I don't normally deal with. After a short search, I found this product: I felt at ease. Highly recommended.

Pros: - Amazingly responsive support, even for free version
- Lots of features and constantly improving
- Very easy to test for development in Docker
- Easy to deploy and scale for production in AWS
- Good documentation

Cons: - No official support for online upgrades (but downtime is minimal)
- Interface could be more modern and intuitive
- Being Java/Tomcat-based takes quite a bit of RAM
- Pricing jump between free and paid is steep with lots of users (but free version scales well)

Overall: I was able to get FusionAuth up and running immediately and without problems for testing. Production deployment with AWS ECS, RDS, ES, and ELB was very quick too. I've been using it in production for about 2 years with minimal downtime or issues. If I run into a missing feature, it's usually added within a month or two.

Pros: Setup process is very straightforward and easy. Cluster setup is surprisingly painless and, again, easy. All (and I mean all) operations are available through the API with variety of clients provided. Easy customization of everything: themes, jwt propagation, messages, passwords, automatic actions, etc.

Cons: The only thing I could think of is lack of pagination in API, but developers are actively working towards the implementation, so this isn't a major concern in a long run.

Overall: After running other open-source idm solutions, switching to FusionAuth was like a breath of fresh air. Stupidly fast startup time compared to other java-bases solutions on the market, way easier customization and overall smooth experience. Plus free plan, can't beat it. We're in the late stage of development and haven't switched to the premium features yet, but price looks really good even for a startup like us.
Worth mentioning, that developers are very active on github.

Pros: - Configurable with templates to the house style
- Gives a real sense of security
- Many different ways of logging in

Cons: - Version numbering: 2FA functionality broke between 1.28 and 1.30; that should have been 2.0
- By far the heaviest app we have running within Betty Blocks; can't it be a little smaller?

Overall: Still not at all fully acquainted with all of the features which FusionAuth provides, so we still have much to discover.

Pros: Free.
Great support.
Simple to setup.
Works on Linux.
Ready to work with Google, Facebook, Apple.
Ready for internationalization..

Cons: No possibility to add custom fields.
Integration with WordPress can be improved.

Overall: I tested different single-sign-on softwares for a project I developed. Then I decided to use this one because it is actively maintained, and it is free :)

Pros: A lot of features, good documentation, great support, theming. Can be installed on-premise or used as SaaS. Multiple installation options (docker, Kubernetes, binary).

Cons: Java-based so a bit heavy if used on-premise or locally.

Overall: We've been looking for an auth solution that supports SSO, OAuth2, MFA and theming while still being cost-effective. We've evaluated a few different solutions but FusionAuth fitted our needs perfectly and after over a year, we're still happy that it was our choice.

Pros: Client SDKs in a wide array of languages.
REST API well documented.
Excellent support, super friendly people.
priced to provide equal access for small startups.

Cons: Occasional breaking changes with the theme engine. This isn't a big deal if you tend to use client side packages and PKCE but for server side auth, always check your custom themes after FusionAuth updates. I've found that if you go a long time without updating/looking at your theme, the easiest way to get your theme back in working order is to diff the default theme ftl files with your custom ftl files.

Overall: Overall 5/5. FusionAuth is an excellent product. Auth is never easy, and if it is, it isn't cheap. FusionAuth bucks this trend.

Pros: Good quality-to-price ratio.
Good support. Option to go free version.
Quite easily installated.
Extense API, makes it easy to use in any language.
Highly customizable.
SAMLv2 / OIDC configurations for free. This enables to connect your apps to different institutions.
Good support and growing community.

Cons: Increasing paid only features. Although it makes sense as a market strategy, I am really hoping this is not going to be a transition to a paid only or "only useful when you pay" version of the product.

Their forum as a support tool is promising, but currently there is no so much user interaction in it, and assistance to asking members relies in the admin and moderators. It would be exciting to see an active community sharing their experience and solutions, helping each other.
Maybe they should boost it up a bit so users are more attracted to use it and expend time sharing. Or maybe it is just a matter of time.

Overall: This product is excellent, and has a really promising future in its area. It's growing quickly as the solution is really well thought, and they are constantly developing new features and fixing bugs.

Currently it's the best quality for the price solution out there, offers a ton of features for free if you have the technical skills to manage it, otherwise you still have an affordable hosted version. There are also some paid features, an although they are increasing in number lately, for now they are not necessary at all.

Overall, the best solution in the auth market.

Pros: Fusion Auth has excellent documentation which is detailed, clear and concise.
It’s free to use and deploy.
There is a python client available which makes it very quick and easy to integrate with other apps.

Cons: The advanced search feature is not available for postgresql only elastic search.

Overall: I am very happy with FusionAuth and will keep using it.
I have already recommended it to my fellow devs.

Pros: Easy to get running on my own cluster. Relatively simple configuration, considering. Mild humor in the documentation went a long way to quelling any frustration I might have felt while figuring it out. Overall, it just works.

Cons: Maybe some of the defaults weren't as helpful as they could be, specifically had to figure out the hard way that symmetrical HMAC keys aren't acceptable to a lot of systems that want priv/pub RSA keys. Slightly awkward web interface requires you to hit SAVE or lose your work--which is good and bad.

Overall: I've used this in two projects now. In the first, I wanted to figure out how to get Istio to authenticate using OAuth2 without running through auth-proxy for every message. This worked really well and allows customers to manage their own accounts, whether user/pass or Google login or whatever else I wanted to set up. Easy.

Pros: Documentation is good, public support excellent in promptness and attitude.
Excellent OAuth/OIDC support.
Flexible deployments.
Sufficient lightweight for embedding in cloud-native architectures.

Cons: One complication for me was the lack of support for proxied deployments of the Admin Console. Had to architect around that.

Overall: Very pleased overall with the ability to integrate with my application in areas like user management and authentication via a gateway.

Pros: Complete, stable, evolving fast, great documentation, and fast support on the website, and free on premise, which allows saving money compared to SAAS equivalents, especially with many users and IdP.

Cons: Some UX parts are a bit hard to use, like the lists of allowed urls.

Overall: We adopted it in our company and progressively replace Auth0, which allows us to save money and control better the solution.

Pros: We have been using FusionAuth for two years now and we have no complaints. Very stable, occasional updates, good support and most importantly completely free. It also included all the features that we needed.

Cons: The documentations could be better. We had a bit of difficulties at the beginning when we were trying to integrate our system but we figured it out eventually.

Overall: We needed a good solution for AAA in our micro-service architecture, so we searched a lot and all the solutions were either paid or weak. FusionAuth stood out to be both free and feature-rich.

Pros: I can use as much or as little of it as I like. I can have my entire own front end for auth powered in the backend by FusionAuth, or have it handle it all. The settings are flexible and the learning curve is not that steep.

Cons: Perhaps better walk through of certain fields and what they do, but not much other than that.

Overall: It was easy to get up and running and really enjoyed how I could use it anyway I like. Even when I did have questions, the forum response was very quick. I can scale up my users easily without much cost and just have features I want to pay for.

Pros: First of all: Unlimited Free Version.
We have a kubernetes set up for our platform and the integration of FusionAuth via the helm chart is just a blizz. Not much fiddling around and together with the kickstarting, we can launch new dedicated FusionAuth instances completely automatised. Further, it can run completely in a private network without needing cloud access, which is a big plus on the privacy side. The API is quite nice to work with and the client libraries (even though not much docs for it, you have to directly go into the code for function definitions) are really helpful and time saving. It is the only and first IAM solution we used, so I cannot really compare it to others, but I like it :)

Cons: The release cycle is almost too fast for us. We have to make jumps of multiple minors every few months^^
The helm charts weren't up to date with the new versions of the apis, but my PRs were reviewed and merged in under a week!!!

Overall: I was in contact with the team already a few times, and each time they were helpful, fast and competent. I can really recommend this tool and 10 out of 10 would use it again for my next projects.

Pros: What I liked the most was the availability of the docker image that someone can play with, in case setting up the product seems to be complex.

Cons: None. For the time I used FusionAuth, I couldn't find any con.

Overall: I didn't get much time to use the product, but I was satisfied for a few weeks I used it. Thanks for coming up with such a great solution.