Bump.sh

Hosted API documentation that diffs each new spec against the last and publishes a human readable changelog

As of 31 August 2026, Bump.sh's pricing is not published; the vendor quotes on request. Bump. Softwr lists it under Documentation. Bump.sh is available on Web.

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Overview

What Bump.sh does

Bump.sh is a hosted service that takes an OpenAPI or AsyncAPI document, renders it as a documentation portal, and compares it with the previously published version. It classifies each change as breaking or non breaking, produces a readable changelog for consumers, and exposes the same comparison as a command line tool and a GitHub action so a pull request can fail when a contract breaks. The diff is the distinguishing capability and the reason to pay. Spec driven documentation removes drift between the docs and the API, but it does not tell anyone what changed, and API teams routinely ship a breaking change because a field rename looked cosmetic in a large diff of generated YAML. Bump.sh moves that detection to the point where it is cheap, before merge, and gives external consumers a changelog they can subscribe to instead of a version number they must reverse engineer. The buyers are platform and API teams with external consumers under some contractual or reputational obligation not to break them, and teams publishing event driven APIs where AsyncAPI support is scarce. The trade offs are that it is hosted rather than self hosted, and that it is again a reference tool: long form guides and tutorials are supported only lightly, so most teams still run a second documentation site.

What people use it for

A public API with paying consumers where an accidental breaking change carries contractual consequences
An event driven platform that needs AsyncAPI documentation rather than REST only tooling
A pull request gate that must fail when a spec change breaks an existing client
A partner portal grouping several internal APIs behind access control on a custom domain

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Bump.sh.

The service is hosted only, so organisations that cannot send their API specification to a third party are excluded regardless of how well the diff works.
Long form guides and tutorials are secondary to the reference, so most teams still run and pay for a second documentation site.
Diff quality depends on spec quality, and a specification generated loosely from code annotations produces noisy change reports that teams learn to ignore.
It is a small European vendor in a category where larger competitors bundle documentation with gateways and portals, so procurement at a large enterprise can take longer than the evaluation did.
Because pricing is not something a buyer can confirm without contact, budgeting for it early in a comparison is guesswork.

Cross-shopped

What people choose instead of Bump.sh

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

Bump.shvs
Redocly
Redocly: Self hostable rendering plus spec linting and governance if you need to keep specs inside your own infrastructure
Bump.shvs
Stoplight
Stoplight: Design first workflow with mocking and style guides when the problem starts before the spec exists
Bump.shvs
Swagger UI
Swagger UI: Free and already present in most stacks if you only need a reference page and not change detection

Pricing

What Bump.sh costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Bump.sh

On request

Hosted API documentation portal
Automatic breaking change detection
Consumer facing changelog
OpenAPI and AsyncAPI support
CI integration and custom domain

Capabilities

Features

Structural spec diff
Every upload is compared with the last and changes are classified as breaking or not
Published changelog
Consumer facing history of API changes generated from the diffs, not written by hand
AsyncAPI support
Event driven and message based APIs documented alongside REST, which few tools cover
CI integration
Command line tool and GitHub action that fail a pull request on a breaking change
Multi API hubs
Group several APIs under one portal with shared branding and navigation
Custom domain and branding
Serve the portal on your own domain with your own styling
Access control
Private documentation for partner or internal only APIs