Thunder Client vs Insomnia: Which is Better in 2026?
Choosing between Thunder Client and Insomnia comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Insomnia wins this matchup. ElevenLabs is our overall API Tools pick. ElevenLabs is our free API Tools pick. Pick Thunder Client if you need a free tier to start with.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Thunder Client
Lightweight REST client for VS Code API testing
Best for you if:
- • You want VS Code REST client
Insomnia
API client for REST and GraphQL
Best for you if:
- • You want supports 7+ API protocols in a single tool, no need for separate clients
| At a Glance | Thunder Client | Insomnia |
|---|---|---|
Starts at | Free Free plan | Free Free plan |
Category | API Tools IDE & Code Editors | API Tools Developer Tools |
Rating | 4.3/5 G2 4.3 16 reviews | 4.4/5 G2 4.4 21 reviews |
Free plan | Yes | Yes |
Watch out for | n/a | Overage fees for mock server requests on Pro tier |
Choose Thunder Client or Insomnia?
Choose Thunder Client if
- You want VS Code REST client
- You want lightweight
- Budget matters (Free vs Free)
Choose Insomnia if
- You want supports 7+ API protocols in a single tool, no need for separate clients
- You want free tier includes unlimited local projects, collection runs, and environments
In-Depth Analysis
Thunder Client
Lightweight REST client for VS Code API testing
Thunder Client's pricing is quite fair, especially with a robust free tier and an affordable Starter plan at $3/month per user.
Strengths
- Pro: VS Code REST client
- Pro: Lightweight
- Pro: Free tier good
- Pro: Active development
- Pro: Good UI
Weaknesses
- Con: VS Code only
- Con: Limited features
- Con: Team features paid
- Con: Better alternatives exist
- Con: Feature gaps
Key features
Insomnia
API client for REST and GraphQL
Insomnia's pricing is quite generous, especially with its robust free 'Essentials' tier which offers significant functionality for individual developers and small teams.
Watch out
Overage fees for mock server requests on Pro tier
Strengths
- Pro: Supports 7+ API protocols in a single tool, no need for separate clients
- Pro: Free tier includes unlimited local projects, collection runs, and environments
- Pro: Git Sync provides true version control without vendor lock-in
- Pro: Open-source core means transparency and community-driven development
- Pro: Inso CLI integrates API testing directly into CI/CD pipelines
Weaknesses
- Con: Git Sync limited to 3 users on the free plan
- Con: Mock server requests capped at 1,000/month on the free tier
- Con: Enterprise SSO (SAML/OIDC) only available on the $45/user/month plan
- Con: Desktop-only application, no browser-based or mobile client available
- Con: Some advanced features require a Kong account even for local-only usage
Key features
Pricing: Thunder Client vs Insomnia
| Plan | Thunder Client | Insomnia |
|---|---|---|
| Tier 1 | Free Free | Free Essentials |
| Tier 2 | $3 month per user Starter | $12 Pro |
| Tier 3 | $7 month per user Business | $45 Enterprise |
| Tier 4 | $16 month per user Enterprise | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Thunder Client pricing and Insomnia pricing.
Key Takeaways
Insomnia
- Larger review base (21 reviews)
- Free tier available
- Our pick for this comparison
Thunder Client
- Choose if you want lightweight REST client for VS Code API testing
The Bottom Line
Insomnia wins this matchup. ElevenLabs is our overall API Tools pick. ElevenLabs is our free API Tools pick.
Frequently Asked Questions
Is Thunder Client or Insomnia better in 2026?
Insomnia wins this matchup. ElevenLabs is our overall API Tools pick. ElevenLabs is our free API Tools pick. Pick Thunder Client for API tools workflows (main strength: VS Code REST client). Pick Insomnia for API tools workflows (main strength: supports 7+ API protocols in a single tool, no need for separate clients).
What are Thunder Client and Insomnia used for?
Thunder Client: Lightweight REST client for VS Code API testing. Insomnia: API client for REST and GraphQL.
What does Thunder Client cost vs Insomnia?
Thunder Client's paid plans start at Free (Starter). Insomnia's paid plans start at Free (Pro).
What's the main difference between Thunder Client and Insomnia?
Thunder Client's main strength: VS Code REST client. Insomnia's main strength: supports 7+ API protocols in a single tool, no need for separate clients.