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Home/Categories/Developer Tools/Echolon
Echolon icon

Echolon

Open source alternative to Postman, Insomnia and Apidog

  • 58 stars
  • MIT
  • Active recently
  • Last commit 60 days ago

Last verified Oct 22, 2026

Manage API requests locally with Git-friendly workspaces for REST, HTTP, and GraphQL testing without a required cloud account.

Visit websiteGitHub58 stars
image of Echolon
TL;DR

Echolon is a local-first API client for developers who want requests, environments, and API collections stored under their control. It focuses on offline use, Git-friendly collaboration, and testing HTTP, REST, and GraphQL workflows without a required cloud account.

Read the full breakdownHide the full breakdownWho it is for, how it works, trade-offs and the FAQ
who it's for

Who Echolon is for#

Repository-based API development

Echolon fits teams that want API requests and environments versioned with application code.

Skip if:

Your team depends heavily on hosted API workspaces and enterprise controls.

Offline API testing

Developers can keep local API workflows available without a required cloud sync step.

Skip if:

You mainly need browser-based API documentation for external customers.

the problem

The problem it solves#

API clients often turn local developer workflows into hosted workspaces. That can be convenient, but it also introduces account requirements, sync behavior, pricing changes, and vendor control over collections that may belong in a repository.

Developers who treat API requests as part of the codebase need local files, version history, and offline access. Echolon addresses that workflow by keeping API work close to Git and the developer machine.

how Echolon solves it

How it solves it#

Local-first API collections

Echolon stores API work locally, which helps developers keep control over requests, environments, and project data.

Git-friendly collaboration

Collections and related API assets can fit into repository workflows rather than only a hosted workspace.

REST and GraphQL testing

The client supports common API development workflows across HTTP, REST, and GraphQL.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Good Postman alternative for code-first teamsEcholon is strongest when teams want API collections to behave like project files.
  • Offline-friendly developer workflowLocal storage makes the tool useful when developers need to work without depending on a hosted workspace.

Trade-offs

  • -May lack large vendor ecosystem featuresTeams using advanced Postman collaboration, monitoring, or enterprise policy features should test whether Echolon covers those workflows.
tech stack · detected from GitHub

What it's built on#

Languages
TypeScript
Frameworks
ExpressReact
frequently asked

FAQ#

What is Echolon?

Echolon is a local-first API client for testing and managing API requests.

Is Echolon a Postman alternative?

Yes. It targets developers who want local, Git-friendly API workflows instead of a hosted workspace-first model.

What API types does Echolon support?

Existing project copy describes support for HTTP, REST, and GraphQL workflows.

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