Best Insomnia CLI (inso) Alternatives for API Testing in CI

If you run Insomnia in CI, you know inso. It’s the command-line companion to Kong’s open-source Insomnia API client, and it does three useful things from a terminal: run test suites, run request collections, and lint OpenAPI specs with Spectral. For a lot of teams that’s enough. For others, the friction shows up fast.

This guide explains what inso actually is, why teams start hunting for an inso alternative, and which tools replace it depending on the job you need done. Some are full API platforms. Some are tiny single-purpose runners. None of them are a perfect drop-in, so the honest answer to “what’s the best insomnia cli alternative” is “it depends on what you run inso for today.”

What inso does, and where the friction starts

inso reads from a .insomnia directory in your working directory (created by Insomnia’s Git Sync) or from the Insomnia app’s data directory if the desktop app is installed. You reference specs and suites by name, not by file path:

inso run test "My API Test Suite" --env "Staging"
inso run collection "Smoke Tests" --env "Staging"
inso lint spec "Petstore Design Doc"
inso export spec "Petstore Design Doc" --output openapi.yaml

Install is straightforward. Homebrew (brew install inso), a Docker image (docker pull kong/inso:latest), or direct download zips for Windows, Linux, and macOS. Spectral, the Stoplight OpenAPI linter, powers inso lint spec. That linting is a genuine strength, and worth keeping in mind before you switch.

So why look for an alternative to inso? A few recurring reasons:

• Coupling to the Insomnia app database. Your test source of truth lives inside a .insomnia dir or the app’s data folder. If you don’t use the desktop app, the model feels backwards.
• Name-based references. Suites and specs are referenced by display name. Rename a suite in the GUI and your CI command breaks silently. Names are not stable identifiers.
• The cloud-account episode. Insomnia 8 (2023) introduced a required cloud login account, which drew real backlash. There were also data-loss and migration incidents around that period. Teams that got burned started looking for tools that don’t tie their request data to a vendor account.
• Linting vs. testing split. inso bundles spec linting and request testing. If you only need one of those, you may want a tool that does it without the other.

If linting OpenAPI is your main reason for running inso, switching tools may cost you more than it saves. Most runners below focus on executing requests and assertions, not Spectral-style style-guide checks. Keep that distinction in mind as you read.

The alternatives at a glance

1. Apidog CLI (the all-in-one option)

Apidog is an all-in-one API platform covering design, debugging, testing, mocking, and documentation. The Apidog CLI brings the testing side into your terminal and CI/CD, and that’s where it competes directly with inso.

apidog run executes test scenarios and collections from the command line. It supports data-driven testing with -d (CSV or JSON datasets), environments with -e, and reporters in CLI, HTML, and JSON formats. It can also upload cloud test reports with --upload-report, so results don’t just vanish into CI logs.

apidog run --access-token <token> -t <scenario-id> -e <env-id>
apidog run -t <scenario-id> -d ./users.csv -r html,cli
apidog run -t <scenario-id> --upload-report

Beyond test runs, the Apidog CLI manages API resources as code: importing OpenAPI, and working with endpoints, schemas, environments, branches, and merge requests from the terminal. That branch-and-resource-as-code model is closer to a Git-native workflow than the .insomnia directory pattern, and it’s the reason teams pick Apidog when they want one tool instead of a stitched-together stack.

Honesty note: Apidog CLI does not have a standalone OpenAPI linter, style-guide, split, join, or bundle command. It validates specs on import, but it does not lint them the way inso does with Spectral. If terminal linting is your core need, that’s a real gap, and inso (or Redocly CLI) keeps the edge there. Where Apidog wins is integration: design, mock, docs, and test live in one place, with data-driven runs and multi-format reporters built in.

Pros

• One platform for design, mock, docs, and test, not separate tools glued together
• Data-driven runs (-d), three reporter formats, environments, cloud reports
• Resources and branches managed as code from the CLI

Cons

• No standalone spec linter (validates on import, doesn’t lint like Spectral)
• Free tier rather than fully open source

If you’re comparing terminal runners head to head, the Apidog CLI complete guide walks through setup, and there are direct breakdowns like Apidog CLI vs Newman and Apidog CLI vs Postman CLI. For wiring it into automation, see the GitHub Actions guide.

2. Newman (the Postman CLI runner)

Newman is Postman’s open-source command-line collection runner. If your team already lives in Postman, it’s the obvious inso cli alternative, because it runs the exact collections you’ve already built.

newman run collection.json -e staging.json -d data.csv -r cli,html,json

Newman supports data-driven iterations with -d, environment files with -e, and reporters in CLI, HTML, and JSON. It’s mature, well-documented, and ubiquitous in CI examples.

Pros

• Runs existing Postman collections with no rework
• Open source, huge community, plenty of CI recipes
• Solid reporter ecosystem

Cons

• Tied to the Postman collection format and its sync model
• No OpenAPI linting at all
• You manage collections in the Postman app, not as plain spec files

For a side-by-side on where Newman ends and a platform runner begins, the Apidog CLI vs Newman comparison covers reporters, data-driven runs, and cloud reporting.

3. Hoppscotch CLI (the open-source runner)

Hoppscotch is an open-source API ecosystem (web, desktop, CLI, and self-hostable) positioned as a Postman and Insomnia alternative. Its CLI, @hoppscotch/cli, runs collections in CI.

Install needs Node.js v22 or newer (Node 20 users stay on CLI v0.26.0):

npm i -g @hoppscotch/cli
hopp test ./collection.json -e ./env.json -d 100
hopp test <collection-id> --token <pat> --server https://hoppscotch.example.com
hopp test ./collection.json --reporter-junit ./report.xml

hopp test recursively runs every request in a collection, executes pre-request and test scripts (pw.test() suites, pw.expect() cases), and validates responses. It exits non-zero if any assertion fails. Flags cover environments (-e), delay (-d), personal access tokens (--token), self-hosted servers (--server), JUnit XML output (--reporter-junit), and data-driven iterations (--iteration-count, --iteration-data).

Pros

• Fully open source and self-hostable, no required vendor account
• Genuine free OSS runner with JUnit reporting and data-driven iterations
• Cloud or self-hosted collection references

Cons

• Node v22+ requirement can bite older CI images
• Smaller ecosystem than Newman
• No OpenAPI linting

If you’re weighing the open-source path, Hoppscotch alternatives and Postman vs Hoppscotch give useful context, and there’s a direct Apidog CLI vs Hoppscotch CLI breakdown.

4. Step CI (the declarative option)

Step CI takes a different shape. Instead of pointing at a collection built in a GUI, you write API tests as declarative YAML or JSON workflow files that live in your repo. Tests are config, reviewed in pull requests like any other code.

version: "1.1"
name: Status check
tests:
  health:
    steps:
      - name: GET health
        http:
          url: https://api.example.com/health
          method: GET
          check:
            status: 200

This is appealing if you found inso’s name-based references brittle. Here, the test definition is the file, and the file path is the identifier. Step CI runs locally and in CI and emits JUnit output.

Pros

• Tests are declarative files in your repo, reviewable in PRs
• No app database, no GUI dependency
• Good fit for spec-driven teams

Cons

• Less interactive than a GUI-backed runner for ad-hoc debugging
• Smaller community; you write more by hand
• Data-driven support is more limited than Newman or Apidog

Step CI is a clean insomnia cli replacement specifically for teams who want test definitions to live next to their application code rather than inside a tool’s database.

5. Hurl (the plain-text option)

Hurl is the most minimal entry here. You write HTTP requests and assertions in plain .hurl text files, and Hurl runs them. No GUI, no database, no account, just text.

GET https://api.example.com/users/1
HTTP 200
[Asserts]
jsonpath "$.id" == 1
jsonpath "$.name" exists

Run it with hurl --test users.hurl. It chains requests, captures variables between them, and supports JUnit and HTML reports. For smoke tests and contract checks, it’s fast and almost zero-config.

Pros

• Dead-simple plain-text format, version-controls cleanly
• No app, no account, tiny footprint in CI
• Chained requests with captured variables

Cons

• Not a full test framework; complex scenarios get verbose
• No collection GUI, so less approachable for non-CLI users
• No OpenAPI linting

How to choose

Pick by the job, not by the brand:

• You want one tool for design, mock, docs, and testing. Use the Apidog CLI. It’s the broadest replacement and the only one here that treats resources and branches as code.
• You already have Postman collections. Use Newman. Don’t rebuild what you have.
• You want fully open source and self-hostable. Use Hoppscotch CLI, or Hurl if you want something even lighter.
• You want tests as declarative files in your repo. Use Step CI.
• You mainly run inso lint spec. Think twice before switching. Spectral linting is inso’s real strength, and most runners here don’t replace it. Pair a runner with Spectral directly, or look at a dedicated linting CLI.

If you’re migrating off the broader Insomnia ecosystem, not just inso, these are worth reading: Apidog vs Insomnia, best Insomnia app alternatives, and the recovery guide for Insomnia data loss and migration. For the CLI-to-CLI move specifically, see migrate from inso to Apidog CLI.