1. Discourse
Discourse suits teams that want an open-source support forum with documented moderation, an API and webhooks. Pro at $100 a month covers a custom domain and unlimited members. It also names SOC 2 Type II and ISO 27001. The catch: no HubSpot integration is listed, and the written uptime guarantee is Enterprise only.
Best for: Companies that want a moderated, open-source support forum on their own domain. Prices, facts and sources
2. NodeBB
NodeBB suits teams that want a forum on their own domain, with the choice of vendor hosting or running it themselves. The cheapest hosted plan is $20 a month, and the code is GPL-3.0. The catch: hosted plans have no free tier, and NodeBB's pricing and about pages name no SOC 2 or ISO certificate, uptime guarantee or named integrations.
Best for: Teams that want a forum on their own domain with an API and the option to self-host. Prices, facts and sources
3. Bettermode
Bettermode suits companies that want a hosted community on their own domain and can pay for it. Starter costs $149 a month, but webhooks, OAuth2 and the CRM and support-desk integrations start at Growth, at about ten times that price. Member caps apply on every plan, and the vendor pages do not mention two-factor sign-in or marking an accepted answer.
Best for: Companies that want a branded customer community with CRM and support-desk integrations. Prices, facts and sources
4. Mighty Networks
Mighty Networks suits teams that want a hosted community with a custom domain and unlimited members from $950 a year (about $79 a month). API access starts on the Scale plan. It can ban members and queue reported posts. The catch: SSO needs the Growth plan, and there is no free plan and no stated uptime guarantee.
Best for: Brands that want a hosted community with courses and events, with an API on Scale and above. Prices, facts and sources
5. Flarum
Flarum suits teams that can run their own PHP server and want a free forum with groups, moderation and an API. There is no hosted plan to buy, so uptime, security and upgrades are yours to handle. Single sign-on, webhooks and compliance certificates are not described in Flarum's published pages.
Best for: Teams with a web host who want a free, lightweight forum they control. Prices, facts and sources
6. Circle
Circle suits teams that want a hosted community with a custom domain and unlimited members at a published $89 a month. The API starts at $199 and SSO and webhooks at $419. The catch: no free plan, no named SOC 2 or ISO 27001 report and no uptime SLA are published.
Best for: Brands and customer teams that want a hosted community with spaces, events and courses. Prices, facts and sources
7. MyBB
MyBB suits teams that can run their own PHP server and want a free forum with group permissions, bans, spam tools and a plugin system. MyBB's published pages describe no hosted plan, so you install and host it yourself. The documentation names no single sign-on, API, integrations or compliance reports.
Best for: Teams with their own web host who want a free forum with built-in moderation tools. Prices, facts and sources
8. phpBB
phpBB suits teams that want a free forum they host themselves, with groups, permissions and moderation tools. The software costs nothing and the documentation names no member cap. The catch: you run the server yourself, and the admin guide describes no API or webhooks and no sign-in beyond LDAP, Apache and social OAuth.
Best for: Teams that want a free, self-run forum with solid moderation tools. Prices, facts and sources