ApiNotes vs Onyx

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ApiNotes compared with Onyx
Detail	ApiNotes	Onyx
What it does	API documentation tool with automatic changelogs and breaking-change detection	Connected things and journeys, crafted like gems
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	IT
Pricing model	Freemium	Not given
Pricing	Starter: Free (1 API, public only, up to 25 subscribers); Team: $19/month (5 APIs, unlimited subscribers)	Not given
Key features	Automatic API Changelog Generation Breaking-Change Detection & Diffs Interactive REST API Documentation OpenAPI 3.1, 3.0 & Swagger 2.0 Support Code Examples in 10+ Languages Custom Domain Support GitHub Integration OpenAPI Validator Spec Diff Tool cURL to OpenAPI Converter	Docstack NoSQL Framework with relational structure and admin tooling Prismal Design System with reusable and customizable components React component library with responsive props and accent theming Prismal WordPress theme integrating React components in Gutenberg Database that runs inside applications with filtered replication and encryption
What makes it different	Auto-written changelog with breaking-change alerts on every spec update 80% cheaper than Stoplight and ReadMe 5-minute setup with no complex configuration Interactive API testing built into documentation Automatic subscriber notifications on spec changes	Good abstractions that make complexity composable rather than hiding it Pragmatic UI/UX blending functionality with great user experiences
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	25 −1 (down) since last check	2 no change since last check
Trust Flow (Majestic)	10	0
Citation Flow (Majestic)	26	17
Referring domains (Majestic)	65	2

3 details filled in for both companies.

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