API Testing
5 api testing tools compared — free and paid options included.
Updated July 2026
Looking for alternatives to Thunder Client? Whether you're unhappy with the pricing, need different features, or just want to explore your options, there are 5 other api testing tools worth considering in 2026.
Thunder Client is lightweight API client built directly into VS Code, with collections, environments, and scripting without leaving the editor. It's best for developers who want to test APIs inside VS Code without switching to a separate desktop app. But it's not the only option — 5 of the 5 alternatives below offer free tiers, and each brings something unique to the table.
Below, we break down every major Thunder Client alternative with pricing, features, and honest recommendations on when each one makes sense.
Thunder Client is a solid api testing tool — it wouldn't have the traction it does otherwise. But these are the reasons teams and solo developers commonly move to something else in 2026:
If none of those apply to you, Thunder Client is probably fine — stick with it. If one or more hit home, the alternatives below each solve for a different pain point.
Before comparing features side-by-side, decide which of these actually matter for your use case. Most switching regrets come from optimizing for the wrong criterion.
| Tool | Free Tier | Paid Plan | Best For |
|---|---|---|---|
| Thunder Client (current) | Yes | $3/mo | Developers who want to test APIs inside VS Code without switching to a separate desktop app |
| Postman | Yes | $14/user/mo | API teams who need a comprehensive platform for testing, documenting, and sharing API workflows |
| Hoppscotch | Yes | $0 | Developers who want a fast, free, browser-based API testing tool without Postman's bloat |
| Insomnia | Yes | $5/mo | API developers who work heavily with GraphQL and want git-synced API workspaces |
| Bruno | Yes | $19 (one-time) | Developers who want API collections stored in git alongside their code, not locked in the cloud |
| HTTPie | Yes | $6/mo | Developers who live in the terminal and want the most readable, low-friction way to test APIs |
Industry-standard API development platform with collections, environments, testing, mocking, and team workspaces. It's best for aPI teams who need a comprehensive platform for testing, documenting, and sharing API workflows.
Pricing: Free tier available. Paid plans start at $14/user/mo. Enterprise: $49/user/mo.
Key features: Collections, Environments, Automated testing, Mock servers, API documentation.
What Postman has that Thunder Client doesn't: Collections, Environments, Automated testing, Mock servers, API documentation.
See full Thunder Client vs Postman comparison | Visit Postman
Open-source, lightweight API development tool that runs in the browser with real-time WebSocket testing and team features. It's best for developers who want a fast, free, browser-based API testing tool without Postman's bloat.
Pricing: Free tier available. Paid plans start at $0. Enterprise: Self-hosted.
Key features: Browser-based, Open source, WebSocket testing, Real-time, Team workspaces.
What Hoppscotch has that Thunder Client doesn't: Browser-based, Open source, WebSocket testing, Real-time, Team workspaces.
See full Thunder Client vs Hoppscotch comparison | Visit Hoppscotch
API client with GraphQL support, design-first workflows, Git sync, and environment management for API development. It's best for aPI developers who work heavily with GraphQL and want git-synced API workspaces.
Pricing: Free tier available. Paid plans start at $5/mo. Enterprise: $14/mo.
Key features: GraphQL support, Design-first, Git sync, Environment management, Plugin ecosystem.
What Insomnia has that Thunder Client doesn't: GraphQL support, Design-first, Git sync, Environment management, Plugin ecosystem.
See full Thunder Client vs Insomnia comparison | Visit Insomnia
Offline-first, git-friendly API client that stores collections as files on your filesystem, not in the cloud. It's best for developers who want API collections stored in git alongside their code, not locked in the cloud.
Pricing: Free tier available. Paid plans start at $19 (one-time).
Key features: Git-friendly, Offline-first, File-based collections, Scripting, No cloud required.
What Bruno has that Thunder Client doesn't: Git-friendly, Offline-first, File-based collections, Scripting, No cloud required.
See full Thunder Client vs Bruno comparison | Visit Bruno
Human-friendly API client available as a modern CLI and a desktop app, designed for readable requests and quick testing. It's best for developers who live in the terminal and want the most readable, low-friction way to test APIs.
Pricing: Free tier available. Paid plans start at $6/mo. Enterprise: Custom.
Key features: Human-friendly CLI, Desktop app, Syntax-highlighted output, Collections & environments, Auth & session support.
What HTTPie has that Thunder Client doesn't: Human-friendly CLI, Desktop app, Syntax-highlighted output, Auth & session support.
See full Thunder Client vs HTTPie comparison | Visit HTTPie
The best Thunder Client alternative depends on your specific situation. If cost is your primary concern, look at the tools with free tiers: Postman, Hoppscotch, Insomnia, Bruno, HTTPie.
For teams that need enterprise features, consider HTTPie — they all offer custom enterprise plans with dedicated support and advanced security.
Our recommendation: try Postman (free to start) if you want the smoothest transition from Thunder Client, or HTTPie if you want something genuinely different.
Explore more api testing content on our Vibe Coding page.
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