Flagsmith vs Overmind
Flagsmith and Overmind are both developer tools tools aimed at developers and small businesses. Flagsmith costs less, from $45/mo versus $120/mo for Overmind. Both have a free plan.
Open-source feature flags and A/B tests, cloud or self-hosted
Open-source loop that turns AI agent traces into models you own
| Pricing | Open source · $45 | Open source · $120 |
| Starting price | $45/mo | $120/mo |
| Free plan | Yes | Yes |
| Free trial | 14 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web | web, linux |
| Country | GB | GB |
| 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 Overmind if
Engineering teams with agents in production that want to improve accuracy and cost and keep ownership of the models.
- Open source and self-hostable, with weights you keep
- Covers the full loop from tracing to serving in one product
- Fixes arrive as reviewable git diffs instead of opaque changes
Look elsewhere if: Teams that only need LLM tracing inside a broader monitoring stack (Datadog) or have no production traffic yet.
Flagsmith vs Overmind 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
Overmind
- Free$0/mo10 optimize runs, 2 training jobs/mo, 5 projects, $50 one-time credit
- Pro$120/moUnlimited optimize runs, training, deploys and projects
- EnterpriseCustomSSO, dedicated support, custom onboarding, usage contracts
- Self-hosted$0AGPL-3.0 platform via Docker Compose; SDK and CLI under MIT
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
Overmind · Key features
- OpenTelemetry tracing with scores applied to traces as they arrive
- Root-cause views that isolate the failing step, tool call or context
- Data Workshop with versioned datasets built from production traffic
- User-defined evals running on live traces
- Optimizers that return prompt, tool or code fixes as git diffs
- Fine-tuning of small open models with downloadable weights
Cons
- Large jump from Free to the $120 Pro plan
- No annual pricing on the hosted service
- AGPL-3.0 limits closed redistribution of the platform
Flagsmith vs Overmind: FAQ
Which is cheaper, Flagsmith or Overmind?
Flagsmith starts at $45/mo and Overmind at $120/mo. Both prices are checked on the vendors' own pricing pages.
Do Flagsmith and Overmind have a free plan?
Yes, both Flagsmith and Overmind have a free plan; paid plans add more usage and features.