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APIs · head to head

Kong vs Testsigma

Kong logo

Kong

APIs

Cloud-native API gateway and service connectivity platform

From
Free
Rated
-
Full reviewWebsite
Testsigma logo

Testsigma

Testing

Natural language test automation for web, mobile and API with a self hosted open source edition

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kong the Plus plan includes 1M API requests a month and charges $200 a month for each additional million; Testsigma the natural language layer is a fixed vocabulary rather than real English, so testers spend the first weeks learning which phrasings the parser accepts, which is learning a language after all.
  • They diverge on capability: Kong covers API Gateway, Testsigma covers Natural language authoring.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Kong and Testsigma actually diverge.

Attributes where Kong and Testsigma differ
AttributeKongTestsigma
Pricing modelsubscriptionPer user per month
PlatformsLinux, Docker, KubernetesWeb, iOS, Android, Linux
CategoryAPIsTesting
Founded2010Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 Kong

  • API Gateway
  • Authentication & Authorization
  • Rate Limiting
  • Kubernetes
  • Consul
  • Eureka
  • PostgreSQL
  • Linux support

Only in Testsigma

  • Natural language authoring
  • Unified web, mobile and API tests
  • Self hosted community edition
  • Cloud device and browser grid
  • Data driven runs
  • Custom functions

What people use each for

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

Kong

  • API gateway management and routingnot Testsigma
  • API development and testingnot Testsigma
  • Enterprise API security and governancenot Testsigma

Testsigma

  • A team maintaining separate Selenium and Appium suites that wants one place for web and native mobile coveragenot Kong
  • Organisations that must keep test data and execution on premises for regulatory reasonsnot Kong
  • QA groups with manual testers being asked to automate without first learning Javanot Kong
  • Evaluating low code test automation properly before committing budget, by running the free edition against the real applicationnot Kong

Where each one falls short

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

Kong

  • The Plus plan includes 1M API requests a month and charges $200 a month for each additional million
  • Plus is capped at 10M requests a month, so growth past that forces an Enterprise contract
  • Plus limits published APIs to 20 and includes one Developer Portal, with a second at $200 a month
  • SSO and audit logging are Enterprise only
  • Enterprise pricing is custom and billed annually

Testsigma

  • The natural language layer is a fixed vocabulary rather than real English, so testers spend the first weeks learning which phrasings the parser accepts, which is learning a language after all.
  • Anything conditional or arithmetic falls through to custom Java or JavaScript, and that code lives in the platform editor rather than your repository, where it gets no code review and no version history you control.
  • The community edition lags the cloud product and is not the version the vendor demonstrates, so a self hosted evaluation can understate or overstate what you would actually buy.
  • Cloud execution is billed separately from authoring seats, so a suite that grows from two hundred to two thousand tests changes the bill without anyone changing the plan.
  • Support and engineering are concentrated in Indian time zones, which slows incident turnaround for teams working in the Americas.

Pricing, plan by plan

Kong

Free
  • Kong Konnect Free TrialFree
    • 30-day free trial
    • Full enterprise functionality
    • Unlimited gateways
  • Kong Konnect Plus$null/month
    • Per gateway pricing billed monthly
    • Up to 5 Serverless Gateways, 2 Hybrid, 2 Dedicated Cloud Gateways
    • 1M API requests included per month
  • Kong Insomnia EssentialsFree
    • Unlimited projects and CLI access
    • Up to 3 Git Sync users
    • 1,000 mock server requests per month
  • Kong Insomnia Pro$12/month
    • Unlimited users with Git Sync access
    • Unlimited organizations
    • RBAC

Testsigma

Free
  • Community Edition$undefined/month
    • Self hosted, open source, no licence fee
    • You supply the infrastructure and the browser or device grid
  • Cloud$undefined/month
    • Priced per authoring user with additional charges for parallel cloud executions and device minutes
    • Published tiers exist but the figures that matter at team scale come from sales

Which should you pick?

Choose Kong if

  • You need api gateway.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes.
  • You also want authentication & authorization.
Kong review

Choose Testsigma if

  • You need natural language authoring.
  • You want to start without paying.
  • You work on Web, iOS, Android, Linux.
  • You also want unified web, mobile and api tests.
Testsigma review

Questions people ask

Is Kong or Testsigma better?
Neither clearly leads. Kong starts at Free and Testsigma at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kong or Testsigma?
Kong starts at Free and Testsigma at Free.
Does Kong or Testsigma run on more platforms?
Kong runs on Linux, Docker, Kubernetes. Testsigma runs on Web, iOS, Android, Linux.
Can I use Kong for free?
Both have a free tier, so you can try either at no cost before committing.
What is Kong best used for?
Kong is most often used for api gateway management and routing, api development and testing, enterprise api security and governance. Of those, api gateway management and routing and api development and testing are not what Testsigma is typically brought in for.
What can Kong do that Testsigma cannot?
Kong covers API Gateway, Authentication & Authorization, Rate Limiting, Kubernetes. Testsigma covers Natural language authoring, Unified web, mobile and API tests, Self hosted community edition, Cloud device and browser grid.

Answered from the vendors’ own pages

Kong: Does Kong offer a free trial?

Yes, Kong Konnect offers a 30-day free trial with full enterprise functionality, unlimited gateways, and no credit card required.

Source
Testsigma: Is the open source edition genuinely usable in production?

Yes for self hosted execution, though it trails the cloud version on newer features and you maintain the grid yourself.

Kong: How much does Kong Insomnia Pro cost?

Kong Insomnia Pro is $12 per user per month with 15% savings available for annual billing.

Source
Testsigma: Do testers need to know Selenium?

Not to write ordinary steps. They will need someone who does as soon as the suite needs custom functions or awkward waits.

Kong: What are Kong Konnect Plus API request limits?

Kong Konnect Plus includes 1M API requests per month; additional requests cost $200 per 1M (maximum 10M per month).

Source
Testsigma: Can it test native iOS and Android applications?

Yes, through Appium underneath, on the hosted device grid or your own devices.

Kong: What is included in Kong Insomnia Enterprise?

Kong Insomnia Enterprise is $45 per user per month with SSO, SCIM, vault integrations, unlimited mock server requests, and Konnect integration.

Source
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