License & Deployment Mix: 12 tools – 9 OSS, 5 SaaS (counts overlap: several OSS products such as Discourse and Mattermost also ship a vendor-hosted edition). The three pure-SaaS entries (Circle, Mighty Networks, Bettermode) are branded-community platforms.
What Is a Social Server?
A social server is software an organization runs to host its own social space – a feed, a forum, or a member network – for a bounded community rather than the open internet. The organization controls the instance: who joins, what the rules are, where the data lives, and (for the self-hostable tools) which server it runs on.
This is the platform you operate, not a tool to manage a presence on someone else’s platform. A company stands up one of these to run an internal social feed for staff, a customer or partner community, a user forum, or a private fediverse instance – the social-software equivalent of running your own mail server instead of posting on a public network.
The information on these pages was researched by a combination of human review and large language models. To suggest an addition or correction, please contact us. Prepared by Rhodium Systems Inc., author of the ResorsIT platform — a unified IT operations management platform for IT teams and MSPs that integrates a curated suite of open-source, commercial, and SaaS applications into a single system with shared identity, single sign-on, access control, and a common audit trail. Use this catalogue only as a starting point for your own research, and review any tool carefully against your own requirements before relying on it. Catalogue data version 2026.197.
Comparison
Cross-tool comparison for the social server category: platforms an organization runs to host its own social space – a feed, a forum, or a member network – for a bounded internal or external+internal community, rather than the public consumer networks.
Shape & Model
| Tool | Shape | Federated (ActivityPub) | Primary content unit |
|---|---|---|---|
| Mastodon | Microblog | Yes | Short posts, follows, boosts |
| Misskey | Microblog | Yes | Posts + custom-emoji reactions |
| Akkoma | Microblog | Yes | Posts (Pleroma-family, light) |
| GoToSocial | Microblog | Yes | Posts (no first-party web UI) |
| Lemmy | Forum / aggregator | Yes | Communities, link/text posts, votes |
| Discourse | Forum | No | Categories, topics, threads |
| NodeBB | Forum | No | Categories, topics (real-time) |
| Flarum | Forum | No | Tag-based discussions |
| Mattermost | Chat | No | Channels, threads, DMs |
| Circle | Membership | No | Spaces (posts + courses + events) |
| Mighty Networks | Membership | No | Spaces (feed + courses) |
| Bettermode | Membership | No | Embeddable spaces |
Federation & Privacy Posture
Only the fediverse tools federate; for all of them, an operator can run the instance closed or allow-listed for a private community:
| Tool | Federation control for a closed community |
|---|---|
| Mastodon | Allow-list mode + secure-fetch + per-domain blocks |
| Misskey | Per-instance silence/suspend; allow/deny lists |
| Akkoma | MRF policy engine (powerful per-instance rules) |
| GoToSocial | Allow-list federation by design; privacy-first defaults |
| Lemmy | Instance + community allow/block lists |
| Discourse / NodeBB / Flarum | N/A (not federated; inherently closed) |
| Mattermost | N/A (not federated; inherently closed) |
| Circle / Mighty / Bettermode | N/A (single-tenant SaaS; inherently closed) |
Access Control & Authentication (→ Authentik)
| Tool | OIDC | SAML | LDAP | SCIM | Mechanism |
|---|---|---|---|---|---|
| Mastodon | native | native | native | none | Bundled OmniAuth (env config) |
| Misskey | none | none | none | none | Local accounts + TOTP/passkey only |
| Akkoma | plugin | none | native | none | LDAP built in; OIDC via Ueberauth |
| GoToSocial | native | none | none | none | Built-in OIDC |
| Lemmy | native | none | none | none | OAuth/OIDC (0.19.x+) |
| Discourse | plugin | plugin | plugin | none | DiscourseConnect native; OIDC plugin |
| NodeBB | plugin | plugin | plugin | none | SSO plugins |
| Flarum | plugin | plugin | plugin | none | OAuth/OIDC/SAML/LDAP extensions |
| Mattermost | native | paid | paid | paid | OIDC free; SAML/LDAP/SCIM Enterprise |
| Circle | paid | paid | none | none | SSO on higher SaaS tiers |
| Mighty Networks | none | none | none | none | Native + social login only |
| Bettermode | paid | paid | none | none | JWT SSO + SAML/OIDC on higher tiers |
Mastodon is the only tool here that ships OIDC, SAML, and LDAP in the core; Misskey and Mighty Networks have no standards-based SSO at all.
Deployment & Licensing
| Tool | License | OSS | Self-host | SaaS |
|---|---|---|---|---|
| Mastodon | AGPL-3.0-only | Yes | Docker / native / K8s | 3rd-party hosts |
| Misskey | AGPL-3.0-only | Yes | Docker / native | 3rd-party hosts |
| Akkoma | AGPL-3.0-only | Yes | Docker / native | – |
| GoToSocial | AGPL-3.0-only | Yes | Docker / native / K8s | – |
| Lemmy | AGPL-3.0-only | Yes | Docker / native / K8s | 3rd-party hosts |
| Discourse | GPL-2.0-only | Yes | Docker | Official hosting |
| NodeBB | GPL-3.0-only | Yes | Docker / native | Official hosting |
| Flarum | MIT | Yes | Docker / native | 3rd-party hosts |
| Mattermost | AGPL-3.0-only | Yes | Docker / native / K8s | Official cloud |
| Circle | Proprietary | No | – | SaaS only |
| Mighty Networks | Proprietary | No | – | SaaS only |
| Bettermode | Proprietary | No | – | SaaS only |
Scale & Target Audience
| Tool | Operational weight | Best-fit audience |
|---|---|---|
| Mastodon | Heavy (multi-service) | Full-featured public/community instance |
| Misskey | Heavy | Feature-rich, customizable community |
| Akkoma | Light | Small private/internal fediverse instance |
| GoToSocial | Very light (1 binary) | Tiny private internal feed |
| Lemmy | Medium | Internal/customer Q&A + discussion board |
| Discourse | Medium-heavy | Flagship customer or staff forum |
| NodeBB | Medium | Real-time customer/internal forum |
| Flarum | Light | Simple, fast self-hosted forum |
| Mattermost | Medium-heavy | Chat-led internal or member community |
| Circle | None (SaaS) | Paid membership / creator community |
| Mighty Networks | None (SaaS) | Branded membership + courses |
| Bettermode | None (SaaS) | Embedded customer/product community |
Monitoring Integration
The self-hostable tools expose standard signals a Telegraf / Fluent Bit / Grafana stack can collect: Prometheus/StatsD metrics where available, plus PostgreSQL/Redis input plugins for their dependencies (Telegraf → InfluxDB), application logs via Fluent Bit → OpenSearch, and dashboards/alerts in Grafana/AlertManager. The SaaS platforms expose only vendor analytics and (some) webhooks; monitoring applies to the integration boundary, not the runtime.
Suitability Summary
- Internal staff feed – Mastodon (full), or GoToSocial/Akkoma (light) with federation off and Authentik SSO. Mattermost if a chat-led space is wanted.
- Customer / community forum – Discourse (strongest), Lemmy (federated, Reddit-style), NodeBB or Flarum (lighter). All proxy-frontable + SSO-capable.
- Paid membership / branded community – Circle / Mighty Networks / Bettermode are the SaaS options; integrate by SSO redirect only, no self-host, no runtime monitoring.
Tools
12 tools.
Akkoma
Akkoma is a lightweight, self-hostable federated (ActivityPub) microblogging server – a maintained fork of Pleroma written in Elixir – that runs a fediverse instance on modest hardware with a Mastodon-compatible API.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native · SSO: OIDC · Tags: fediverse, activitypub, microblog, pleroma, self-hosted
Bettermode
Bettermode (formerly Tribe) is a proprietary SaaS customer-community platform – embeddable, highly customizable discussion spaces with gamification, a GraphQL API, and an app store – aimed at brand and product communities.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML · Tags: community, customer-community, saas
Circle
Circle (circle.so) is a proprietary all-in-one SaaS community platform for creators and brands – discussion spaces, courses, events, live streams, chat, and paid memberships under a branded web and mobile presence.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML · Tags: community, membership, courses, saas
Discourse
Discourse is the flagship open-source community-forum platform – threaded discussion with trust levels, gamification, and rich moderation – self-hosted via Docker or run as managed hosting, for customer or internal communities.
License: GPL-2.0-only (OSS) · Kind: web · Deploy: docker, saas · SSO: OIDC, SAML · Tags: forum, community, discussion, self-hosted
Flarum
Flarum is a lightweight, fast, open-source forum platform (PHP + Mithril.js) – simple, modern, extension-driven discussion software for self-hosted customer or internal communities.
License: MIT (OSS) · Kind: web · Deploy: docker, native · SSO: OIDC, SAML · Tags: forum, community, discussion, self-hosted
GoToSocial
GoToSocial is a lightweight, single-binary federated (ActivityPub) server written in Go – a low-footprint fediverse instance with strong privacy defaults and built-in OIDC, driven by standard Mastodon-API client apps.
License: AGPL-3.0-only (OSS) · Kind: service · Deploy: docker, native, k8s · SSO: OIDC · Tags: fediverse, activitypub, microblog, lightweight, self-hosted
Lemmy
Lemmy is a self-hostable, federated (ActivityPub) link-aggregator and discussion platform – a Reddit-like network of topic communities with posts, threaded comments, and voting – run as an organization’s own forum instance.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, k8s · SSO: OIDC · Tags: fediverse, activitypub, forum, link-aggregator, self-hosted
Mastodon
Mastodon is a self-hostable, federated (ActivityPub) microblogging server – a feed of short posts, follows, and reactions that an organization runs as its own social-network instance, open to the fediverse or closed for a private community.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, k8s · SSO: OIDC, SAML · Tags: fediverse, activitypub, microblog, social-network, self-hosted
Mattermost
Mattermost is a self-hostable, open-source chat-first collaboration platform (a Slack alternative) usable as a closed community server – channels, threads, and integrations for an internal staff space or a members-only community.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, k8s · SSO: OIDC, SAML · Tags: chat, community, collaboration, self-hosted, slack-alternative
Mighty Networks
Mighty Networks is a proprietary SaaS platform for branded membership communities – combining a social feed, courses, events, and paid memberships with white-label web and mobile apps.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: none · Tags: community, membership, courses, saas
Misskey
Misskey is a feature-rich, self-hostable federated (ActivityPub) microblogging server – known for custom emoji reactions, a Drive file system, MFM rich text, and heavy UI customization – run as an organization’s own social instance.
License: AGPL-3.0-only (OSS) · Kind: web · Deploy: docker, native · SSO: none · Tags: fediverse, activitypub, microblog, social-network, self-hosted
NodeBB
NodeBB is an open-source, real-time forum platform built on Node.js – modern threaded discussion with a social-feed feel, plugins, and themes – self-hosted or via managed hosting for customer or internal communities.
License: GPL-3.0-only (OSS) · Kind: web · Deploy: docker, native, saas · SSO: OIDC, SAML · Tags: forum, community, discussion, self-hosted
