Step CI vs Postman

Free and open source

From $9 per user/month (Solo, billed annually)

Free and open source. You pay in engineering time and CI minutes.

Postman reorganised its plans: Solo $9, Team $19 and Enterprise $49 per user/month billed annually — the old Basic tier is gone. The free tier is generous for individuals; costs come from collaborator seats and monitoring/mock-call volume.

Everything, self-hosted

Free plan for individuals and small teams with limited collection runs, mock calls and monitors.

Emerging

Step CI · since 2022

Category standard

Postman, Inc. · since 2012

• YAML workflows are easy to review in a pull request and need no runtime knowledge.
• Generates a starting suite from an OpenAPI spec.
• Includes basic load-testing capability in the same file format.

• Near-universal adoption — collections are a lingua franca between teams and vendors.
• Covers design, mocking, testing, documentation and monitoring in one place.
• Newman makes any collection runnable in CI without rewriting it.

• Looks dormant: the last npm release (2.8.2) was June 2024 and the last commit August 2024, so treat it as unmaintained until that changes.
• YAML hits a ceiling on complex conditional logic.
• Ecosystem and reporting are thin compared to established tools.

• Cloud-first sync raised real concerns for teams handling sensitive API credentials; the offline story has been repeatedly reduced.
• Collections stored in the vendor cloud rather than your repo make code review and branching awkward.
• The desktop app has grown heavy, and per-seat costs add up on large teams.

Hard to recommend for new work while it sits unmaintained; Bruno or Schemathesis cover the same ground with active development.

Teams that want one tool covering the whole API lifecycle and value ecosystem ubiquity.