Flagsmith vs Insomnia
Flagsmith and Insomnia are both developer tools tools aimed at developers and small businesses. Insomnia costs less, from $12/mo versus $45/mo for Flagsmith. Both have a free plan.
Open-source feature flags and A/B tests, cloud or self-hosted
Open-source API client for REST, GraphQL, gRPC and MCP from Kong
| Pricing | Open source · $45 | Open source · $12 |
| Starting price | $45/mo | $12/mo |
| Free plan | Yes | Yes |
| Free trial | 14 days | 14 days |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web | macos, windows, linux |
| Country | GB | US · 2015 |
| 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 Insomnia if
Developers who want a fast, local-first, open-source API client with Git-based collaboration.
- Open-source core under the Apache 2.0 license
- Local-first storage keeps sensitive requests off the cloud
- Clean, fast interface that is lighter than Postman
Look elsewhere if: Teams that need a full API platform with published docs and broad workspace collaboration (Postman, Apidog, Stoplight).
Flagsmith vs Insomnia 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
Insomnia
- Essentials$0Local, Git and cloud projects; Git Sync for up to 3 users
- Pro$12/user/mo$10 billed annually; unlimited users, RBAC, 10K mock requests
- Enterprise$45/user/moSelf-serve up to 50 users; SSO, SCIM, storage policies
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
Insomnia · Key features
- Requests for REST, GraphQL, gRPC, WebSocket, SSE and Socket.IO
- MCP client for testing Model Context Protocol servers
- OpenAPI design editor with live preview and linting
- Local, Git or end-to-end encrypted cloud storage per project
- Collection runner with pre- and post-request scripts and tests
- Mock servers built from specs, responses or plain-language prompts
Cons
- Collaboration and API documentation features trail Postman
- Free Git Sync is limited to 3 users
- Past login and sync changes hurt community trust
Flagsmith vs Insomnia: FAQ
Which is cheaper, Flagsmith or Insomnia?
Insomnia starts at $12/mo and Flagsmith at $45/mo. Both prices are checked on the vendors' own pricing pages.
Do Flagsmith and Insomnia have a free plan?
Yes, both Flagsmith and Insomnia have a free plan; paid plans add more usage and features.