Best API Clients in 2025
A complete comparison of the top API clients: KeyRunner, Postman, Insomnia, Hoppscotch, and more. See which tool best fits your workflow.
| Feature | KeyRunner | Postman | Insomnia | Hoppscotch | Thunder Client | Rapid API | SoapUI |
|---|---|---|---|---|---|---|---|
| Offline Mode | ✅ Full | ⚠️ Partial | ⚠️ Partial | ⚠️ Partial | ⚠️ Partial | ⚠️ Partial | ✅ |
| Secrets Store Integration | ✅ | ✅ Vault | ✅ Vault | ✅ Env Secrets | ✅ Enterprise | ⚠️ Limited | ⚠️ Limited |
| Cloud Sync (For collaboration) | ✅ Encrypted | ✅ Yes | ✅ Yes | ✅ Yes | ❌ No | ✅ Yes | ❌ No |
| Data Redaction | ✅ Yes | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
| Secrets Usage Monitoring | ✅ Tracks usage source & method | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
| Monitoring & Observability | ✅ Built-in | ✅ Yes | ⚠️ Limited | ❌ No | ❌ No | ❌ No | ❌ No |
| SDK for Secrets Retrieval | ✅ Yes (Runtime SDK) | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
| Secrets Never Viewed | ✅ Enforced | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional |
| Secrets Stay Local | ✅ Yes | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional | ⚠️ Optional |
| Low/No-Code Playground | ✅ Yes | ⚠️ Limited | ⚠️ Limited | ⚠️ Limited | ⚠️ Limited | ⚠️ Limited | ⚠️ Limited |
| No Telemetry/Logging | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
| RBAC & Zero Trust | ✅ | ⚠️ Limited | ⚠️ Limited | ❌ | ❌ | ❌ | ❌ |
| Workspaces/Projects/Tenants | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ | ❌ |
| Mock Servers | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
Why Choose KeyRunner?
KeyRunner is built with a security-first mindset. Unlike other tools that sync your data to the cloud, KeyRunner operates fully offline and integrates directly with Git.
- Secrets store integration
- Cloud sync with full client-side encryption
- Configurable data redaction
- Secrets observability & monitoring
- SDK for runtime secrets retrieval
- Secrets are never visible to developers
- Secrets never leave client infrastructure
- Low-code/no-code API playground with request chaining
- Offline mode support
- Collaborative workspaces & Git integration
- Zero telemetry, no data logging
- RBAC and zero trust API access control
- Workspaces, projects & tenant-level scoping
- Mock servers and request simulation
- Support for REST, WebSockets, Socket.io, and cURL
Last updated: May 30, 2025
Frequently Asked Questions
Can I use KeyRunner without login or signup?
Yes. KeyRunner works out of the box without requiring you to create an account. There’s no forced sign-up, and no credentials are collected.Perfect for privacy-conscious developers.
Can we use KeyRunner for team collaboration?
Absolutely. Teams can collaborate securely using Git-based version control. Combined with workspace scoping, role-based access, and optional encrypted cloud sync, it supports both solo and multi-developer workflows.
What does Zero Trust mean in this context?
Zero Trust means every API interaction is scoped and validated - no assumptions. Secrets are accessed based on strict roles and conditions, with no implicit trust. KeyRunner enforces this through RBAC, tenant isolation, and local enforcement.
Does sensitive data ever leave my infrastructure?
No. By default, all data stays local. Even with optional cloud sync enabled, encryption is done client-side and only non sensitive data is synced for collaboration, meaning your secrets never leave your control or appear in plain text - ever.
Take control of your business
Find out about our latest product changes as we continue improving KeyRunner to enable your team to collaborate better.