In our forum software com­par­i­son, we introduce you to the most popular products for online com­mu­ni­ties. We include pro­pri­etary software, open source projects, and cloud solutions including hosting.

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vBulletin

The fee-based forum system vBulletin from the Cal­i­forn­ian company, vBulletin Solutions, is one of the most suc­cess­ful software solutions in the community sector. The powerful forum software is currently available in its 5th version and is primarily aimed at demanding users who want to create pro­fes­sion­al community projects. This focus is also reflected in the price since vBulletin is located in the upper price range. Users either opt for an unlimited software license for a one-off payment or they choose the rental model for cloud operation that comes with monthly costs.

If you operate your forum with vBulletin, you benefit from a trusted software with an enormous range of functions including mes­sen­gers, user groups, surveys, and blog functions. The robust software ar­chi­tec­ture is designed for flex­i­bil­i­ty and per­for­mance. Add-ons such as the Mobile Suite for iOS and Android or footers without branding can be added to your order for a fee. In addition, users of the popular forum system can access a wide range of third-party plug-ins. The user interface of the forum can be adapted to the op­er­a­tor's taste. The software provides cus­tomiz­able themes in a re­spon­sive design. In­te­grat­ed SEO features such as search engine friendly URLs, meta keywords, and de­scrip­tion tags are designed to ensure more success with the search engine.

According to the de­vel­op­ers, the in­stal­la­tion and con­fig­u­ra­tion takes only 15 minutes. In the cloud model, vBulletin Solutions also handles hosting, main­te­nance, and software updates. Operating a pro­fes­sion­al online forum is therefore also possible for users without any previous forum knowledge. If you want to monetize your community project, you can use an ad­ver­tis­ing plug-in provided by vBulletin in co­op­er­a­tion with the ad­ver­tis­ing service provider Nativo.

Tech­ni­cal­ly, users of the PHP-based forum software are tied to the MySQL database man­age­ment system. Only from vBulletin 5.2.6+ onwards, is the MySQL-Fork MariaDB supported in a different way. From version 5 onwards, the software is com­pat­i­ble with PHP 7.

System re­quire­ments:

  • PHP 5.6+
  • MySQL 5.5+ or MariaDB 5.1.5+ (from version 5.2.6+)

Demo version available

Ad­van­tages Dis­ad­van­tages
Powerful solutions for large forums Com­par­a­tive­ly high costs for the software license
Optimized for mobile devices Only supports DBMS MySQL up to version 5.2.5
Op­ti­miz­able for search engines Only comes without branding for a fee
Ready to go in 15 minutes  
Cloud solution available  
  •  
Note

If users are re­strict­ed to a certain database man­age­ment system by forum software, we con­sid­ered this to be a dis­ad­van­tage in our overview. MySQL was es­pe­cial­ly crit­i­cized by users after it was taken over by Oracle. The reasons for this are a lack of trans­paren­cy and func­tion­al dif­fer­ences between the open source version and the pro­pri­etary product. The best case would be for the forum system user to have the choice of which DBMS to use.

phpBB

The forum software phpBB is a free forum system whose ever-growing feature set can compete with even high-priced pro­pri­etary solutions such as vBulletin. The open source software is licensed under the GNU General Public License (GPL) and boasts a large user community worldwide.

The current version phpBB 3.2 has a modular design and can be adapted to the re­spec­tive needs of the user by various ex­ten­sions. The community offers a large selection of free styles. If required, themes and templates can be in­di­vid­u­al­ized. A re­spon­sive layout has been supported since the previous version.

Even in the areas of ad­min­is­tra­tion, mod­er­a­tion, and rights man­age­ment, phpBB is in no way inferior to other forum systems. The open source solution does not offer SEO features such as search engine friendly URLs.

Tech­ni­cal­ly, phpBB is char­ac­ter­ized by a broad support of common database man­age­ment systems. The current version is com­pat­i­ble with PHP 7 and can be in­te­grat­ed into the Joomla! content man­age­ment system via an au­tho­riza­tion plug-in. Bridges for other CMS are not available.

System re­quire­ments:

  • PHP 5.4+
  • MySQL 3.23+, MySQLi, Post­greSQL 8.3+, SQLite 2.8.2+, SQLite 3.6.15+, Oracle, MS SQL Server 2000+, or MariaDB 5.1+
  • PHP ex­ten­sions: json

Demo version available

Ad­van­tages Dis­ad­van­tages
Free forum software Not op­ti­miz­able for search engines
Open source Support only via the community
Optimized for mobile devices  
In­te­gra­tion in Joomla!  
Note

If the source code of a software is publicly ac­ces­si­ble, we regard this as an advantage. Open source ensures trans­paren­cy and creates pressure for the quality to be good. Program errors in open source software are usually better doc­u­ment­ed and corrected more quickly. Industry giants such as Microsoft, Apple, and Google have also rec­og­nized the ad­van­tages of open source software and are now in­creas­ing­ly involved in open source projects. Please note, however, that open source software is not nec­es­sar­i­ly free of charge.

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WoltLab Suite

The German forum system WoltLab is promoted by its de­vel­op­ers as the “engine of suc­cess­ful com­mu­ni­ties”. A special feature is the in­te­grat­ed CMS. The software is currently available in its 3rd version and offers every­thing for modern forum operation with its re­spon­sive templates, in­di­vid­ual design options, and a search engine friendly website structure.

The basis is a modular software ar­chi­tec­ture. While the core of the pro­pri­etary WoltLab Suite is available free of charge, all other com­po­nents such as the forum, a gallery, calendar functions, file man­age­ment, and the blog area can be purchased as separate apps if required. Forum operators, who want to use the software without branding, have to pay a sig­nif­i­cant surcharge, as with vBulletin.

If desired, forum operators can connect WoltLab with social networks such as Facebook, Twitter, or Google Plus and thus enable users to register via their social media profile. In addition, the forum software offers in­ter­faces through which content can be con­ve­nient­ly dis­trib­uted via Reddit, Pinterest, or WhatsApp.

WoltLab GmbH provides an official plug-in store on its website where users can purchase ex­ten­sions, styles, and developer tools. The resources are both official ex­ten­sions and third-party software.

The forum software WoltLab Suite (written in PHP) requires DBMS MySQL or MySQL fork MariaDB. When pur­chas­ing the software license, an in­stal­la­tion service can be added. A cloud version of the forum software is not available.

System re­quire­ments:

  • PHP 5.5.4+
  • MySQL 5.1.17+ or MariaDB 10.0.22 with InnoDB support
  • PHP ex­ten­sions: mbstring, libxml, dom, zlib, pdo, pdo_mysql, json, pcre, and hash

Demo version available

Ad­van­tages Dis­ad­van­tages
In­te­grat­ed CMS Only comes without branding for a fee
Optimized for mobile use  
Op­ti­miz­able for search engines  
Numerous ex­ten­sions  

Invision Community

Invision Community is the latest version of the popular Invision Power Board (IP.Board) from IPS, Inc. The powerful software combines dis­cus­sion forums with CMS func­tion­al­i­ty and offers numerous extras for pro­fes­sion­al community projects. Ex­ten­sions are offered via an official online mar­ket­place.

The func­tion­al spectrum of Invision Community includes user-defined member profiles, a multi-level mod­er­a­tion system, detailed per­mis­sion settings as well as in­ter­faces to the most common social networks. If necessary, community members can be kept happy with gam­i­fi­ca­tion tools. A cloud-based anti-spam system helps forum operators reduce unwanted posts from spam bots. Pro­fes­sion­al forum operators also benefit from mon­e­ti­za­tion options such as paid premium mem­ber­ships and in­ter­faces to ad­ver­tis­ing networks. If required, a web store can be in­te­grat­ed.

With Invision Community, IPS focuses primarily on the dis­tri­b­u­tion of cloud solutions. Although acquiring a self-hosted license is possible, it has to be renewed every six months. Anyone who fails to do so will lose access to software updates, technical support, the anti-spam system, the mar­ket­place for software en­hance­ments, and support forums. As an al­ter­na­tive to the standard version, IPS offers the forum software as an en­ter­prise solution with extended support.

If Invision Community is used on its own hardware or as part of third-party hosting, PHP, and the DBMS MySQL must be provided. The vendor rec­om­mends PHP 7. An in­stal­la­tion service can be purchased when buying the software license.

System re­quire­ments:

  • PHP 5.4+
  • MySQL 5.5+
  • PHP ex­ten­sions: all standard ex­ten­sions as well as GD2 and mbstring

Demo version available

Ad­van­tages Dis­ad­van­tages
Wide range of functions Com­par­a­tive­ly high costs for cloud operation or pur­chas­ing the software license
Optimized for mobile use The self-hosted license has to be renewed
Op­ti­miz­able for search engines Supports only DBMS MySQL
Cloud solution available  

MyBB

The MyBB (orig­i­nal­ly: My­Bul­let­inBoard) offers basic functions for a pro­fes­sion­al forum operation and is available to users free of charge under the GNU Lesser General Public License (LGPL).

The basic features of the software include ad­min­is­tra­tion and mod­er­a­tion functions, private messages, a rep­u­ta­tion system, calendar, and events as well as a template editor. Ad­min­is­tra­tion tasks can be managed in the back­ground via a task sched­ul­ing system. Unwanted user behavior can be punished by a warning system.

The core software shows weak points in the areas of mobile and SEO. However, various resources for extending the open source system are available to forum operators directly via the project website.

The PHP-based forum software MyBB supports MySQL, the free DBMS Post­greSQL, and SQLite.

System re­quire­ments:

  • PHP 5.2+
  • MySQL 5.0+, Post­greSQL 8.1+, or SQLite 3
  • PHP ex­ten­sions: SimpleXML, mbstring, gd as well as the cor­re­spond­ing vendor specific database PHP extension.
Ad­van­tages Dis­ad­van­tages
Free Not op­ti­miz­able for search engines
Open source offer Not optimized for mobile devices
Com­pat­i­ble with various DBMS Support only via the community

XenForo

XenForo is a pro­pri­etary forum software in the medium price range that focuses on social com­mit­ment. An intuitive “like” system allows users to earn trophies and therefore receive ap­pre­ci­a­tion for good con­tri­bu­tions.

Standard features include user-defined color schemes, a central activity display, and an alarm system for quotes and answers. For success in the search engines, XenForo provides easily readable URLs and the pos­si­bil­i­ty of semantic an­no­ta­tion.

The forum software is designed to be an ex­pand­able system. Forum operators adapt the software in­di­vid­u­al­ly to their re­spec­tive re­quire­ments with the help of add-ons. The provider rec­om­mends Media Gallery and the Resource Manager as possible ex­ten­sions. Ad­di­tion­al add-ons can be obtained from third-party vendors. This may incur ad­di­tion­al costs. Users can also find various styles in re­spon­sive design in the add-on area on the provider's website. This means that the forum system also looks good on mobile devices.

In order to operate a forum based on XenForo, users must have PHP and the MySQL database man­age­ment system. Other DBMS are not supported.

System re­quire­ments:

  • PHP 5.4.0+
  • MySQL 5.5+
  • PHP ex­ten­sions: MySQLi, GD (with JPEG support), PCRE, SPL, SimpleXML, DOM, JSON, iconv, ctype, cURL

Demo version available

Ad­van­tages Dis­ad­van­tages
Modular system Supports DBMS MySQL only
Op­ti­miz­able for search engines  
Optimized for mobile devices  

Ultimate Bulletin Board (UBB)

The first version of the Ultimate Bulletin Board (short: UBB) was released in 1997. The pro­pri­etary software is therefore one of the oldest forum systems. UBB dis­tri­b­u­tion is based on unlimited software licenses. The update service and support end after one year, but can be renewed for another 12 months. UBB is in the mid-price segment.

The modular forum software consists of three com­po­nents: As an extension to the basic module with a con­tri­bu­tion area and member ad­min­is­tra­tion, UBB provides an optional photo gallery. Both modules can be in­te­grat­ed into the UBB portal if required. Users can thus create a complete website based on UBB.

With detailed ad­min­is­tra­tion and mod­er­a­tion functions, spam pro­tec­tion in the form of captchas as well as search engine friendly URLs and mobile friendly templates, UBB offers all basic functions for modern forum operation. However, UBB does not offer the pos­si­bil­i­ty to extend the core software with plug-ins according to in­di­vid­ual re­quire­ments. This makes the forum system much more rigid than com­pa­ra­ble pro­pri­etary products such as XenForo or the WoltLab Suite.

Tech­ni­cal­ly, the PHP-based software relies on the MySQL database man­age­ment system. Other DBMS are not supported.

System re­quire­ments:

  • PHP 5.4–5.6
  • MySQL 5.5+
  • PHP ex­ten­sions: GD or Im­ageMag­ick, mbstring
Ad­van­tages Dis­ad­van­tages
In­te­grat­ed portal (optional) Expansion via plugins not possible
Optimized for mobile devices Supports DBMS MySQL only
Op­ti­miz­able for search engines  

Simple Machines Forum (SMF)

With Simple Machines Forum (SMF), forum operators have another open source system with a large user community available free of charge. According to the de­vel­op­ers, users with SMF can implement pro­fes­sion­al community projects in just a few minutes.

The current version 2 of SMF offers a com­plete­ly revised template engine that allows users to adapt the web interface of the forum system to their in­di­vid­ual re­quire­ments. The SMF community has a large selection of ready-made themes available free of charge in the download area of the project website - many of them in a mobile-friendly design. Users can also find various ex­ten­sions for the core software here. CMS bridges are available for XOOPS, mambo, and Joomla! among others.

As a scalable forum system, SMF is equally suitable for small and large com­mu­ni­ties. According to the de­vel­op­ment team, the focus is on per­for­mance. In addition, the re­quire­ments of search engines were taken into account. The open source project is char­ac­ter­ized by good doc­u­men­ta­tion.

SMF supports MySQL and the free DBMS Post­greSQL, SQLite, and SQLite 2.x. The forum software is not com­pat­i­ble with SQLite 3.

System re­quire­ments:

  • PHP 5.4.0+,
  • MySQL 4.0.18+, Post­greSQL 8.0+, SQLite, SQLite 2.x

Demo version available

Ad­van­tages Dis­ad­van­tages
Open source Support ex­clu­sive­ly through the community
Free  
Active community  
Com­pat­i­ble with various DBMS  
Op­ti­miz­able for search engines  
Optimized for mobile devices  
Bridges for selected CMS  

FluxBB

FluxBB is also available free of charge. The current version 1.5 comes with a function spectrum reduced to the es­sen­tials, which is ben­e­fi­cial to its per­for­mance. However, users do not have to make any com­pro­mis­es in terms of ad­min­is­tra­tion and mod­er­a­tion. On the other hand, there is a need for im­prove­ment with regard to SEO and usability on mobile devices. The selection of ready-made themes in the re­spon­sive design is straight­for­ward. Users that aren’t satisfied with the func­tion­al spectrum of the core software will find various resources on the provider's website for in­di­vid­u­al­iz­ing the forum system.

Please note: FluxBB 1.5 will be replaced by its successor FluxBB 2.0 in the near future. The de­vel­op­ment team has decided to continue the open source project under the name "Flarum". A beta version is already available for download at flarum.org.

System re­quire­ments:

  • PHP 4.4.0+
  • MySQL 4.1.2+, Post­greSQL 7.0+, SQLite 2
Ad­van­tages Dis­ad­van­tages
Free Not op­ti­miz­able for search engines
Open source Dis­con­tin­ued model
Stream­lined software  
Various ex­ten­sions available  
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Finding the right forum software

Which forum software is right for you depends on what your planned community project requires. If you only want to run a hobby or lifestyle forum to share your interests with like-minded people, free open source solutions are ideal. Without major in­vest­ments, forum systems such as phpBB, MyBB, or SMF can be used to build fully func­tion­al com­mu­ni­ties with all the necessary features. If the demands on the project grow or the number of members increases, you can switch to another product and move the forum. Many of the providers presented have a so-called merge system that allows you to change the forum software without losing any data.

If, on the other hand, you are planning a pro­fes­sion­al community project, for example to provide an ad­di­tion­al contact channel for the customers of your web store, you should rely on a pro­fes­sion­al hosting basis and complete support right from the start. Cloud solutions such as vBulletin or Invision Community are ideal here, where the forum software is available as an all-inclusive package including hosting and main­te­nance.

A com­par­i­son of forum software

To make it easier for you to select the right forum software for your project, we have compared the presented community solutions in a table depending on their core functions.

  vBulletin phpBB WoltLab Suite Invision Community myBB
Developer vBulletin Solutions, Inc. phpBB Limited WoltLab GmbH Invision Power Services MyBB Group
Version 5.3.1 3.2.2 5.0.5 4.1.19.4 1.8.14
Pro­gram­ming language PHP 5.6+ PHP 5.4+ PHP 5.5.4+ PHP 5.4+ PHP 5.2+
DBMS MySQL 5.5+ MySQL 3.23+ MySQLi Post­greSQL 8.3+ SQLite 2.8.2+ SQLite 3.6.15+ MariaDB 5.1+ MySQL 5.1.17+ MySQL 5.5+ MySQL 5.0+ Post­greSQL 8.1+ SQLite 3
License Pro­pri­etary GNU GPLv2 Pro­pri­etary Pro­pri­etary LGPL (free software)
Cost Upper price range Free Mid price range Upper price range Free
CMS In­te­grat­ed blog functions In­te­gra­tion in Joomla! possible Fee-based blog app available In­te­grat­ed CMS functions In­te­gra­tion via plug-in possible
Mobile friendly Yes Yes Yes Yes No
Plug-ins Yes Yes Yes Yes Yes
Themes Yes Yes Yes Yes Yes
Optimized for search engines Yes No Yes Yes No
  XenForo UBB SMF FluxBB
Developer XenForo Limited UBB­Sys­tems, LLC SMF Team FluxBB Team
Version 2.0.1 7.6.1.1 2.0.15 1.4.12
Pro­gram­ming language PHP 5.4.0+ PHP 5.4 - 5.6 PHP 5.4.0+ PHP 4.4.0+
DBMS MySQL 5.5+ MySQL 5.5+ MySQL 4.0.18+ Post­greSQL 8.0+ SQLite SQLite 2.x MySQL 4.1.2+ Post­greSQL 7.0+ SQLite 2
License Pro­pri­etary Pro­pri­etary BSD (from Version 2.0) GPL
Cost Mid price range Lower price range Free Free
CMS In­te­gra­tion via plug-in possible No In­te­gra­tion in Joomla! possible No
Mobile friendly Yes Yes Yes Yes
Plug-ins Yes No Yes Yes
Themes Yes Yes Yes Yes
Optimized for search engines Yes Yes Yes No
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