Apache Answer is an open source Q&A platform you can self-host — a Stack Overflow for Teams alternative for building a community forum, help center, or internal knowledge base with questions, answers, tags, voting, and reputation.

What is Apache Answer?

Apache Answer is an open source Q&A platform for building a community forum, help center, or knowledge base. Users ask and answer questions, organize them with tags, vote the best answers up, and earn reputation and badges — the familiar Stack Overflow model, but self-hosted and fully under your control. It’s a top-level Apache Software Foundation project.

What is Apache Answer best for?

Teams that want a searchable, structured knowledge base instead of scattered chat threads and buried docs. It fits internal engineering or support Q&A, a public help center for a product, or an open community forum — anywhere the same questions get asked repeatedly and the answers are worth keeping, indexing, and ranking.

What can Apache Answer do?

Full Q&A workflow: questions, answers, comments, and voting to surface the best content
Tag system with tag-following, plus advanced search and real-time suggestions as you type
Reputation and badges to reward contributors and gate moderation privileges
Admin, moderator, and user roles with a moderation and review workflow
Configurable login and access control, including third-party OAuth logins via plugins
Plugin system for third-party login, cache, search, and other extensions
SEO-friendly public pages so answers get indexed by search engines
Email notifications, dark mode, theming, and community translations for many languages

Where does Apache Answer fall short?

It’s focused and lightweight, not a full community suite — you won’t find the deep forum threading, chat, or extensive plugin marketplace of something like Discourse.
Much of the flexibility lives in plugins (SSO, search backends, storage), so a production setup often means enabling and configuring several of them rather than getting everything out of the box.
There is no first-party managed cloud from the project — self-hosting is the intended path, so hosting and upgrades are on you.

Is Apache Answer free?

Yes — Apache Answer is completely free and open source under the Apache License 2.0, with no paid tiers or edition gates. You self-host it and pay only for the server it runs on. There’s no upsell to a paid cloud from the project itself.

What does Apache Answer replace?

Apache Answer is a self-hosted alternative to Stack Overflow for Teams for private and public Q&A, and it overlaps with knowledge-base and help-center features of Confluence and Zendesk. Instead of per-seat SaaS pricing, you own the data and the deployment.

FAQ

Is Apache Answer open source? Yes. It’s licensed under the Apache License 2.0 — a permissive OSI-approved license — and is an official Apache Software Foundation project.

Can I self-host Apache Answer for free? Yes. Self-hosting is the primary way to run it and costs nothing beyond your own server. The quickest start is the official Docker image.

Is Apache Answer a good Stack Overflow for Teams alternative? For most teams, yes — it delivers the same question, answer, tag, vote, and reputation model without per-user subscription pricing, and you keep full ownership of the content.

What do I need to run Apache Answer? A server that can run Docker; the image starts with a built-in database for small instances, and you can point it at MySQL or Postgres for larger deployments.