Flagsmith vs Radar
Flagsmith and Radar are both developer tools tools aimed at developers and small businesses. Flagsmith costs less, from $45/mo versus $149/mo for Radar. Both have a free plan.
Open-source feature flags and A/B tests, cloud or self-hosted
Open-source Kubernetes UI and MCP server for engineers and agents
| Pricing | Open source · $45 | Open source · $149 |
| Starting price | $45/mo | $149/mo |
| Free plan | Yes | Yes |
| Free trial | 14 days | 14 days |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web | web, macos, windows, linux |
| Country | GB | IL · 2023 |
| Rating | — | — |
Choose Flagsmith if
Engineering teams that want open-source, self-hostable feature flags with optional cloud hosting and built-in experiments.
- Open source under BSD-3-Clause with a real self-hosting path
- Unlimited flags, environments and segments on every plan
- Wide SDK coverage including mobile and Flutter
Look elsewhere if: Teams that want flags bundled with product analytics or a large enterprise vendor ecosystem (PostHog, LaunchDarkly).
Choose Radar if
Platform and DevOps teams that want a free open-source Kubernetes UI and a safe way to give AI agents cluster context.
- Fully featured open-source build under Apache 2.0
- Single binary and desktop app for macOS, Windows and Linux, no account needed
- Read-only MCP endpoint lets agents inspect clusters safely
Look elsewhere if: Teams that need full-stack metrics, logs and APM in one hosted suite (Datadog, Dynatrace).
Flagsmith vs Radar pricing
Flagsmith
- Free$050k requests/mo, 1 team member, 1 project
- Start-Up$45/mo$40/mo billed yearly; 1M requests, 3 members, A/B testing
- Scale-Up$300/mo$250/mo yearly; 5M requests, SAML SSO, roles, audit logs
- EnterpriseCustomPrivate cloud or on-prem, SLA, onboarding, priority support
Radar
- Radar OSS$0Apache 2.0, unlimited clusters, one cluster at a time
- Cloud Free$03 hosted clusters, unlimited users, 100 investigations/mo
- Team$149/cluster/moScoped RBAC, fleet cost rollup; 20% off annual contracts
- Enterprise$299/cluster/moSSO, SCIM, SIEM export, self-managed; 20% off annual contracts
- CustomCustomAnnual contract, air-gapped, data residency, 99.9% SLA
Flagsmith · Key features
- Feature flags and remote config with user, segment and percentage targeting
- Bayesian A/B experiments built directly on existing flags
- Scheduled flags, multivariate flags and change requests
- SDKs for JavaScript, React, iOS, Android, Flutter, Python, Go and Rust
- OpenFeature provider for cloud, private cloud and self-hosted setups
- Audit logs, roles and permissions for governance
Cons
- Free cloud plan allows only one team member
- SSO, roles and audit logs require Scale-Up at $250 or more a month
- Experiments v1 supports one primary metric per test
Radar · Key features
- Issues queue that groups failures by root cause and blast radius
- Live topology graph and resource browser for any conformant cluster
- Event and change timeline with diffs beyond the one-hour default
- Helm release views with upgrades and rollbacks
- Argo CD and Flux drift detection, diagnosis and sync
- Cluster audit with 44 best-practice checks
Cons
- Per-cluster pricing gets expensive for large fleets
- Radar Cloud SSO and SCIM only on the $299 Enterprise plan
- Team plan keeps just 3 days of timeline history
Flagsmith vs Radar: FAQ
Which is cheaper, Flagsmith or Radar?
Flagsmith starts at $45/mo and Radar at $149/mo. Both prices are checked on the vendors' own pricing pages.
Do Flagsmith and Radar have a free plan?
Yes, both Flagsmith and Radar have a free plan; paid plans add more usage and features.