First up is Release AI, which monitors API changes and writes release notes with an AI system. It can produce multiple formats (HTML, Email, JSON, YAML and PDF) and can link to other services like Slack and Dropbox. It's good for API-first companies that need to document changes rapidly for many people.
Another contender is Released, which uses an AI copywriter to generate professional release notes and can link to Jira, Confluence and Slack. It can categorize posts by product, release or feature, and publish to multiple channels. It's good for product teams that want to focus on the important parts of a release while still producing high-quality documentation.
If you're looking for a service geared more toward fast-shipping product development, Makelog offers a way to see what's ready to ship and to automatically publish change announcements. It can link to a variety of project management tools and offers customizable changelog posts so team members can stay up to date and on the same page. Makelog's AI features can spotlight minor updates and bug fixes so release communications don't slow down the fast shipping cadence.