Insomnia
Swell
| Feature | Insomnia | Swell |
|---|---|---|
| Pricing | Free / from $5/mo | Free / from $299/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.2 / 5 | 4.3 / 5 |
| Best For | developers, api-designers, small-teams, individual-developers | developers, subscription-businesses, custom-ecommerce, b2b-commerce |
| Founded | 2015 | 2016 |
| Api Client | ✓ | ✗ |
| Graphql Explorer | ✓ | ✗ |
| Environment Variables | ✓ | ✗ |
| Git Sync | ✓ | ✗ |
| Plugins | ✓ | ✗ |
| Design Specs | ✓ | ✗ |
| Automated Testing | ✓ | ✗ |
| Headless Api | ✗ | ✓ |
| Subscriptions | ✗ | ✓ |
| Multi Currency | ✗ | ✓ |
| Custom Models | ✗ | ✓ |
| Webhooks | ✗ | ✓ |
| Admin Dashboard | ✗ | ✓ |
✓ Insomnia Pros
- Beautiful and intuitive desktop application
- Git-based sync for version control of API specs
- Plugin system for extending functionality
- Supports REST, GraphQL, gRPC protocols
✗ Insomnia Cons
- Kong acquisition changed direction (cloud-focused)
- Free tier became more limited over time
- Fewer integrations than Postman
✓ Swell Pros
- Extremely flexible API
- Built-in subscription support
- Good for unique business models
- Developer-friendly
✗ Swell Cons
- Requires development resources
- Expensive for small stores
- Smaller ecosystem
The Verdict
Insomnia is built for developers and api designers, with a focus on api-client and graphql-explorer. Swell targets developers and subscription businesses and leads with headless-api and subscriptions.
On pricing, Insomnia is the clear winner for budget-conscious users — starting at $5/mo compared to $299/mo for Swell. That $294/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Insomnia offers broader built-in capabilities (7 features vs 6), while Swell takes a more focused approach — which can mean a simpler, faster onboarding experience.
Both tools are a solid fit for developers — in those cases, the decision often comes down to workflow style and how your team prefers to organize work.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.