The Knowledge

Discourse Free to download. SaaS starts at $200 / Mo

Discourse is a modern, open-source platform that is rapidly growing in popularity. Co-created by Jeff Atwood (of Stack Overflow fame), Discourse has a large active plugin and modification marketplace, and robust SSO functionality. Easily integrated with WordPress, Discourse is a good solution for small to medium sized communities.

NodeBB Free to download. SaaS starts at $100 / Mo

A new generation platform similar to Discourse, which is open-source and supported by a developer community. Not quite as advanced as Discourse yet, but Node has a vastly superior Analytics dashboard. Can be self hosted, but SaaS plans offer full technical support and upgrades. Another good option for small to medium sized communities.

Vanilla Free to download. SaaS starts at $199 / Mo

Vanilla is a well established open-source platform which is free to download. Vanilla offer a SaaS solution with a mid-range price point. Lightweight and extensible via plugins, Vanilla is PHP-based and is supported by an active developer community.

Hoop.la SaaS starts at $750 / Mo

Hoop.la is a flexible, feature-rich SaaS platform which is widget based, and customisable via themes or CSS. It's highly scalable and you retain ownership and control of your data. An easy out-of-the box solution for small to medium sized communities.

iAdvize Request a demo. SaaS starts at $500 / Mo

iAdvize: Your visitors can chat on your website with other users, members of your brand community. These community members can log in to the dedicated community platform and answer visitor questions.