Hosted solution to maintaining web api/dev portal?

We're a SaaS startup rolling out a REST API to a niche developer community. We'd like to create a dev portal with API Reference, code examples, etc.

Thinking of using Confluence as we already use JIRA Studio, but I'd appreciate any alternative suggestions, mainly because Atlassian's hosting does not allow us to add plugins (like better code formatter, for example).

What publishing tools do folks find particularly adept for dev portals? Any (low-cost ;- ) hosting providers that host those tools - we'd really like to avoid maintaining our own Confluence/WP deployment.

Thanks! -nikita