SHSelfHostIndex
YA

YAF.NET

Open-source forum software for ASP.NET

Forums & Community ★ 549 stars Medium setup Apache-2.0

YAF.NET, or Yet Another Forum.NET, is an open-source discussion forum package for ASP.NET. It offers a full forum experience for the Microsoft web stack.

Official siteSource code

Key features

  • Native ASP.NET forum
  • Theming and module support
  • Granular permission system
  • Moderation toolset

Pros & cons

Strengths

  • Released under the Apache-2.0 license
  • First-class Docker support for quick deployment
  • Written in C#
  • Lightweight — runs in 512 MB RAM

Trade-offs

  • .NET hosting required
  • Smaller community than PHP forums

Is YAF.NET secure?

No known vulnerabilities affect YAF.NET's latest release (v4.0.9). OSV.dev lists 5 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-43937, published 2026-05-12 (155 days ago), fixed in 4.0.5

Source: OSV.dev, checked 2026-10-14. How this is measured.

YAF.NET replaces

Self-hosted phpBB alternativesSelf-hosted vBulletin alternatives

Health badge

Maintain YAF.NET? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 84 · excellent

Markdown
[![SelfHostIndex health score for YAF.NET](https://selfhostindex.com/badge/yaf-net.svg)](https://selfhostindex.com/app/yaf-net/)
HTML
<a href="https://selfhostindex.com/app/yaf-net/"><img src="https://selfhostindex.com/badge/yaf-net.svg" alt="SelfHostIndex health score for YAF.NET"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/yaf-net.svg
   :alt: SelfHostIndex health score for YAF.NET
   :target: https://selfhostindex.com/app/yaf-net/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Compare YAF.NET

15 head-to-head comparisons.

Similar forums & community apps