Flagsmith Description

Flagsmith gives software engineering teams a self-hosted or fully managed feature flagging platform for controlling releases across web, mobile, and backend systems. Ship code behind a flag, then decide who sees it — by environment, user, or custom segment — without redeploying.

Run Flagsmith however fits your infrastructure: our managed cloud, your own private cloud, or fully on-premise.

What you get:

Progressive rollouts with one-click rollback if something breaks
Live config changes — flip features on or off instantly, no redeploy required
Segment-based A/B and multivariate testing
Project and role-based access control for multi-team organizations
Native integrations with the tools already in your stack
MCP support and a CLI so AI agents and scripts can manage flags directly

Open source at its core, Flagsmith is built for teams that want control over where their configuration data lives.

Pricing

Pricing Starts At:
$45/month
Pricing Information:
Up to 50,000 Requests Per Month*
1 Team Member
Unlimited Feature Flags
Unlimited Environments
Unlimited Identities and Segments
API Access
Free Version:
Yes
Free Trial:
Yes

Integrations

API:
Yes, Flagsmith has an API

Reviews - 5 Verified Reviews

Total
ease
features
design
support

Company Details

Company:
Flagsmith
Year Founded:
2018
Headquarters:
United Kingdom
Website:
Update This Listing

Media

Product Details

Platforms
Web-Based
Windows
Linux
On-Premises
Types of Training
Training Docs
Live Training (Online)
Webinars
In Person
Training Videos
Customer Support
Business Hours
Online Support

Flagsmith Features and Options

Feature Management Software

Implement a feature toggle, deploy the code, and determine visibility later on. Each environment can have the same toggle configured with different states, eliminating the need for redeployment to alter behavior in the live environment. The targeting options encompass boolean toggles, multivariate toggles, remote configuration values, user identities with attributes, segments created from rules based on those attributes, and percentage-based rollouts for canary deployments. For evaluation purposes, Flagsmith provides server-side SDKs that operate in local evaluation mode, allowing flags to be resolved within the process without the need for a network call for each check. The Edge API delivers client and mobile SDKs from the nearest geographic location. Offline mode is available for environments lacking outbound connectivity. There are over 15 open-source SDKs available, including those for TypeScript, Python, Java, C#, Go, Ruby, PHP, Swift, Kotlin, and Flutter. Governance capabilities feature audit logs, role-based access management, approval workflows for change requests, scheduled updates, SAML SSO, and SCIM provisioning. Automation can be achieved through the REST API and Terraform integration.

A/B Testing
Entitlement Management
Feature Alerts
Feature Flag / Toggle
Feature Rollout Management
KPI Monitoring
Kill Switch
Multivariate Testing
Product Experimentation
Whitelist Creation

AB Testing Software

Flagsmith serves as the experiment bucketing engine, allowing you to maintain your existing analytics setup seamlessly. With Flagsmith, you can create a multivariate flag and assign percentage weights to different variants, enabling deterministic traffic distribution. Bucketing occurs on an individual basis, ensuring that each user consistently receives the same variant until you choose to adjust the weights. Target specific user groups for your tests using segments, whether based on subscription tiers, geographic regions, or early access beta groups. This same feature can be leveraged for beta programs to gather initial feedback. Importantly, Flagsmith does not track events or analyze significance. Instead, simply forward the variant name to your preferred analytics platform. It integrates effortlessly with tools like Amplitude, Mixpanel, Segment, Heap, and Rudderstack, or you can connect it to your own data pipeline via webhooks. This consolidates your metrics into a single source of truth. Whether you utilize our cloud services, your private cloud, or an on-premise setup, Flagsmith delivers consistent performance.

Audience Targeting
Campaign Segmentation
Funnel Analysis
Heatmaps
Landing Pages / Web Forms
Multivariate Testing
Split Testing
Statistical Relevance Analysis
Surveys
Test Scheduling
Visual Editor

Continuous Delivery Software

Application Lifecycle Management
Application Release Automation
Build Automation
Build Log
Change Management
Configuration Management
Continuous Deployment
Continuous Integration
Feature Toggles / Feature Flags
Quality Management
Testing Management

DevOps Software

Approval Workflow
Dashboard
KPIs
Policy Management
Portfolio Management
Prioritization
Release Management
Timeline Management
Troubleshooting Reports

Configuration Management Software

Access Control / Permissions
Application Deployment
Automated Provisioning
Infrastructure Automation
Node Management
Orchestration
Reporting Analytics / Visualization
Task Management

Flagsmith User Reviews

Write a Review
  • Name: Asif A.
    Job Title: DevOps Engineer
    Length of product use: 2+ Years
    Used How Often?: Daily
    Role: User
    Organization Size: 100 - 499
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Affordable Feature Manager.

    Date: Jul 24 2021

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

    Positive: 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.

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

    Read More...
  • Name: Jean-François C.
    Job Title: Software Developer | Team Lead
    Length of product use: 2+ Years
    Used How Often?: Weekly
    Role: User, Administrator, Deployment
    Organization Size: 1,000 - 4,999
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    An incredible alternative to Launch Darkly

    Date: Jul 20 2021

    Summary: 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.

    Positive: * 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

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

    Read More...
  • Name: David T.
    Job Title: CTO
    Length of product use: 1-2 Years
    Used How Often?: Daily
    Role: User, Administrator, Deployment
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Feature Flags as a Service

    Date: Jul 13 2021

    Summary: 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.

    Positive: 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.

    Negative: 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.

    Read More...
  • Name: Anonymous (Verified)
    Job Title: Principal Engineer
    Length of product use: Less than 6 months
    Used How Often?: Daily
    Role: User, Administrator, Deployment
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    The perfect tool

    Date: Jul 12 2021

    Summary: 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!

    Positive: 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!

    Negative: 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.

    Read More...
  • Name: Alejandro G.
    Job Title: CEO
    Length of product use: Less than 6 months
    Used How Often?: Monthly
    Role: User, Administrator, Deployment
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Best Open Source Feature Manager

    Date: Jul 07 2021

    Summary: 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.

    Positive: 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.

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

    Read More...
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