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Specmatic vs Graphwake

Last checked 2026-11-022 min read

Graphwake tells the consumer teams of an endpoint when a breaking change appears in its OpenAPI spec, and scores how far the change reaches. Specmatic turns API specs into contract tests and mocks, and can check backward compatibility in CI so a breaking change fails before merging. Specmatic tests your service against its spec. Graphwake keeps the map of who depends on it and tells them.

Exampleopenapi.yaml · before → after
− before+ after
/orders/{id}:  get:    parameters:      - name: currency        in: query        schema: { type: string }-       required: false+       required: true    responses:      "200":        description: OK        content:          application/json:            schema:              type: object              properties:                id: { type: string }-               total: { type: number }
  • BreakingNew required parameter currency
  • BreakingResponse field total removed
GET /orders/{id}reaches checkout and mobile-app
A removed response field is a breaking change. Graphwake tells the teams that subscribed to the endpoint.

Graphwake is for you if

  • You want the teams that depend on an endpoint told, in their own channel.
  • You need a map of consumers and owners that you can keep current.
  • You want an impact score for each change set before it merges (with the CI step).

Already using Specmatic? Keep it. Graphwake works next to it.

On this page
  1. What Graphwake adds
  2. Where Graphwake fits
  3. At a glance
  4. When Specmatic alone is enough
  5. Using both
  6. Questions

What Graphwake adds

  • Alerts to subscribed teams

    The consumer teams of an endpoint hear about a breaking change, in Slack, Microsoft Teams or email.

  • Impact score and ownership map

    Each change set gets a 0-100 score with public rules, next to a map of consumers and owners.

  • Never blocks a build

    The CI step never fails or blocks a build; it tells the teams that consume the endpoint.

  • No code access

    Graphwake reads only your OpenAPI spec. Nothing to run against your service.

Where Graphwake fits

Graphwake starts from the same OpenAPI spec. Consumer teams subscribe to the endpoints they call and owners are named per service or endpoint, so when the spec changes, the teams it affects hear about it in Slack, Microsoft Teams or email, and the change set gets an impact score.

At a glance

Specmatic facts as of 2026-11-01, from specmatic.io and its pricing page. “Not listed” means we did not find it there.

SpecmaticGraphwake
Tells subscribed consumer teamsNot listedYesin Slack, Microsoft Teams or email
Impact score and ownership mapNot listedYes0-100 with public rules
What it isExecutable contract tests and mocks from API specs, with no test code to writeA dependency map and alerting service for OpenAPI specs
Backward-compatibility checkYesin CI a breaking change can fail before mergingYesthe affected consumer teams are alerted
See who your next breaking change reaches.Paste a spec URL or add one CI step. 7-day free trial. Cancel before day 7 and you pay nothing.
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Good to know

When Specmatic alone is enough

  • You want automated tests generated from your spec and run against the real service.
  • You want a merge gate that fails a build on a breaking change.

Using both

Specmatic verifies that the service matches its spec; Graphwake makes sure that when the spec changes, the right teams know. They answer different questions.

Questions

Will Graphwake block my pull requests?

Never. Its CI step reports and alerts; your build carries on.

Can I keep Specmatic?

Yes. Graphwake works next to it.

Pick an endpoint. See who it reaches. 7-day free trial. Cancel before day 7 and you pay nothing.

Start free trial

Sources and last verified

Competitor facts were checked on 2026-11-01; check their pages for the latest.