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APIs · head to head

Thunder Client vs Treblle

Thunder Client logo

Thunder Client

APIs

Lightweight REST API client built as VSCode extension

From
Free
Rated
-
Full reviewWebsite
Treblle logo

Treblle

APIs

API observability, security, and governance platform

From
$233/month
Rated
-
Full reviewWebsite

The short version

  • Only Thunder Client has a free tier, so it costs nothing to try first.
  • Each has a real cost: Thunder Client paid plans are billed annually only: Starter is $3 per user per month and capped at a maximum of 10 seats, Business is $7 per user per month with 500 monthly collection runs per user, and Enterprise is $16 per user per month for unlimited runs; Treblle no free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • They diverge on capability: Thunder Client covers REST Client, Treblle covers API discovery.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Thunder Client and Treblle actually diverge.

Attributes where Thunder Client and Treblle differ
AttributeThunder ClientTreblle
Starting priceFree$233/month
Pricing modelfreemiumsubscription
Free tierYesNo
PlatformsVSCode extension, Webweb, api
Founded2021Unknown

Identical on both: user rating (Not yet rated), category (APIs).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Thunder Client

  • REST Client
  • Environment variables
  • Response testing
  • VSCode
  • GitHub
  • Webhook support
  • VSCode extension support
  • Web support

Only in Treblle

  • API discovery
  • Runtime security
  • API governance
  • Compliance monitoring
  • API documentation and analytics
  • Agentic AI support

What people use each for

The jobs each tool is most often brought in to do.

Thunder Client

  • API Developmentnot Treblle
  • API Gatewaynot Treblle
  • API Testingnot Treblle
  • API Documentationnot Treblle
  • Microservicesnot Treblle

Treblle

  • Gaining full visibility into API traffic across multi-cloud environmentsnot Thunder Client
  • Detecting shadow APIs and runtime security risksnot Thunder Client
  • Meeting compliance audit requirements such as HIPAA or GDPRnot Thunder Client
  • Governing API design standards through CI/CDnot Thunder Client

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Thunder Client

  • Paid plans are billed annually only: Starter is $3 per user per month and capped at a maximum of 10 seats, Business is $7 per user per month with 500 monthly collection runs per user, and Enterprise is $16 per user per month for unlimited runs

Treblle

  • No free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • Growth and Enterprise pricing is custom and not published, requiring a sales conversation to budget.
  • Core plan is limited to 1 workspace and only 30 days of data retention.
  • SSO and on-prem/BYO cloud deployment are reserved for the top Enterprise tier.

Pricing, plan by plan

Thunder Client

Free
  • FreeFree
    • REST client
    • Collection management
    • Local testing
  • Pro$8/monthly
    • Cloud sync
    • Team collaboration
    • Advanced features

Treblle

$233/month
  • Core$233/month
    • Billed yearly
    • 5 APIs
    • 500 requests/min
  • Growth$undefined/month
    • Custom APIs and request limits
    • 50M requests/month baseline
    • API security
  • Enterprise$undefined/month
    • Unlimited workspaces, APIs, and requests/min
    • API governance and compliance
    • SSO

Which should you pick?

Choose Thunder Client if

  • You need rest client.
  • You want to start without paying.
  • You work on VSCode extension, Web.
  • You also want environment variables.
Thunder Client review

Choose Treblle if

  • You need api discovery.
  • You work on web, api.
  • You also want runtime security.
Treblle review

Questions people ask

Is Thunder Client or Treblle better?
Neither clearly leads. Thunder Client starts at Free and Treblle at $233/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Thunder Client or Treblle?
Thunder Client has a free tier; the other does not. Paid plans start at Free for Thunder Client and $233/month for Treblle.
Does Thunder Client or Treblle run on more platforms?
Thunder Client runs on VSCode extension, Web. Treblle runs on web, api.
Can I use Thunder Client for free?
Yes. Thunder Client has a free tier, so you can try it without paying. Treblle starts at $233/month.
What is Thunder Client best used for?
Thunder Client is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Treblle is typically brought in for.
What can Thunder Client do that Treblle cannot?
Thunder Client covers REST Client, Environment variables, Response testing, VSCode. Treblle covers API discovery, Runtime security, API governance, Compliance monitoring.

Answered from the vendors’ own pages

Thunder Client: How much does Thunder Client cost?

Thunder Client publishes a free plan at no cost, then Starter at $3, Business at $7 and Enterprise at $16, all priced annually.

Source
Treblle: What does Treblle cost?

Treblle's Core plan costs $233/month billed yearly and covers 5 APIs and 5M requests/month; Growth and Enterprise plans use custom pricing for larger request volumes and advanced features.

Source
Thunder Client: Is Thunder Client free?

Yes, there is a free plan. It is used through the Thunder Client extension for VS Code, available from the marketplace, with limits applied compared with the paid tiers.

Source
Treblle: Is there a free plan?

Treblle does not offer a free tier; it instead offers a no-credit-card demo rather than free ongoing access.

Source
Treblle: How is usage metered?

Plans are metered by number of APIs monitored and requests per minute/month, with the Core plan capped at 500 requests/min and 5M requests/month.

Source
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