ConfigCat vs Flagsmith
ConfigCat
configcat.com
Flagsmith
flagsmith.comSide by side
| Figure | ConfigCat | Flagsmith |
|---|---|---|
| Price from | $110/mo | $40/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 5 | 8 |
| Spec score · Release Management Software | 8.4 (#7) | 9.1 (#2) |
| Spec score · Feature Flag Software | 8.5 (#9) | 9.1 (#4) |
| Company | ConfigCat’s own company story says the service officially started in 2018. | The site identifies Bullet Train Ltd. as the company behind Flagsmith. |
| Headquarters | 1136 Budapest, Tátra u. 5/A, Hungary | London, England |
| Integrations | Listed integrations include Amplitude, Bitbucket, CircleCI, Datadog, GitHub, GitLab, Jira, Slack, Terraform, Zapier, and others. | Native integrations include Amplitude, Datadog, Dynatrace, GitHub, GitLab, Grafana, Jira, Mixpanel, New Relic, Segment, Sentry, Slack, Terraform and warehouse tools. |
| Product | ConfigCat is a hosted feature flag and configuration management service that lets teams control features after code is deployed. | Flagsmith manages feature flags and remote configuration for web, mobile, and server-side applications. |
| Rollouts | It supports user targeting, percentage rollouts, A/B testing, and variations. | Flags can target environments, individual users, user segments, or a percentage of users for gradual releases. |
| Security | ConfigCat says flags are evaluated client-side, user data stays in the customer's system, and it stores flag values and targeting rules; SDK keys are 256-bit and rotatable. | The maker states that Flagsmith is SOC 2 Type 2 accredited and that its self-hosted instance supports HIPAA, FedRAMP, and ISO 27001. |
| Support | The company offers chat or email with its development team and a community Slack, while plan support ranges from best effort to premium SLA. | Start-Up includes email technical support; Scale-Up includes priority email and chat technical support; Enterprise includes real-time chat support with Slack optional. |
Plans
ConfigCat
- Forever FreeFree
- Pro$110 a month
- Smart$325 a month
- Enterprise$900 a month
- Dedicated$4,500 a month
Flagsmith
- FreeFree
- Start-Up$40 a month
- Start-Up (annual billing)$40 a month
- Start-Up (monthly billing)$45 a month
- Scale-Up$250 a month
- Scale-Up (annual billing)$250 a month
- Scale-Up (monthly billing)$300 a month
- EnterprisePriced on request
In their own words
ConfigCat
ConfigCat is a hosted feature flag and configuration management service for controlling features after code is deployed. Teams can target users, roll out changes by percentage, run A/B tests, and use variations. Open-source SDKs support mobile, desktop, website, and backend applications, with languages including JavaScript,.NET, Android Java, iOS Swift, Kotlin Multiplatform, Python, Go, and Rust. Listed integrations include GitHub, GitLab, Jira, Slack, Terraform, Datadog, and others. ConfigCat says flags are evaluated on the client, user data remains in the customer's system, and the service stores flag values and targeting rules; SDK keys are 256-bit and rotatable. It states that it is ISO/IEC 27001:2022 certified and offers EU-only data governance. Plans include unlimited seats, service connections, monthly active users, contexts, and feature flag reads, but limit config JSON downloads and network traffic. The Forever Free plan is free; Pro is $110 a month, billed monthly. Higher listed plans range from $325 a month to $4,500 a month.
Flagsmith
Flagsmith manages feature flags and remote configuration for web, mobile, and server-side applications. Teams can target releases by environment, individual user, segment, or percentage, and split users across variations for A/B and multivariate tests. Remote configuration lets teams change properties such as text, colors, and behavior without deploying new code. Deployment options include hosted cloud, private cloud, and self-hosted. Its listed integrations include Amplitude, Datadog, GitHub, GitLab, Grafana, Jira, Mixpanel, OpenFeature, Segment, Sentry, Slack, and Terraform; environment-level webhooks can send events to a team's infrastructure. The maker says core feature-flag functionality is open source and most of the product uses the BSD-3 licence. The Free plan includes 50,000 monthly requests and one team member; after exceeding the request limit, users have seven days to upgrade before action is taken. Paid plans start at $40 a month, billed 12 months paid up front. Platforms include Android, API, iOS, Linux, macOS, self-hosted, web, and Windows.