This is from another site I'm on. phpBB. Probably the most widely used free forum solution, and in my opinion, also the worst. New to forums, many people consider phpBB to be the best. Just a few months ago, I did. But since I've been more educated about the world of forum software I've realised the evil, evil thing that phpBB is. phpBB is actually often used by developers for their forums. Why? Only God knows. It's open source... so is MyBB... it's regarded as professional... but vBulletin more so. Let's look at this in more detail. Security - it's a known fact that loads of 2.x.x versions of phpBB are completely exploitable and easy to hack. phpBB release security fixes at about the same speed that a snail eats through an entire lettuce. vBulletin, on the other hand, releases them nearly instantly after they have found the solution (which, evidently, takes phpBB a long time). But overall, if you're on top of the latest releases, the security isn't MUCH of a problem. Many people new to forums (or noobs) use phpBB. Bad mistake, bro. It's the hardest to use admin-wise. Not only do all mods need to be manually installed, but to install the automatic installer (which is a mod), you need to make the manual edits. phpBB haven't once considered "Why don't we just add a mod installer?" Along with that, phpBB's source code is far more complicated than the alternative forum softwares and thus is more difficult to mod in the first place. With MyBB, vBulletin (and most others), it's a simple XML file upload and perhaps a few images/php files to upload, but no manual editing usually. In a world of Ajax (if you don't know what this is, Google it) phpBB still haven't caught on. Every click is another page. They must love new pages so much, they haven't even installed quick reply yet in all this time (granted, it'll be coming). The software is also seriously lacking feature wise, it's not caught on to telling people what users are doing in their profiles, profile messages, quick reply, WYSIWYG, ModX defaulting. And best of all, the support is pretty bad too. The times I've been there, if lucky, I've got about one support reply and usually it hasn't fixed the problem. Not enjoying my time with phpBB, I actually abondoned my forum. A month later, phpBB was kind to be and had let the spam bots in (yes, it has terrible protection with them). My forum was kind of broken anyway, after attempting and failing to install a quick reply mod. I finally got my act together and decided to use MyBB. The transfer was easy, the forum better, everything was fantastic. I'm now using vBulletin, and you really can see the difference compared to phpBB. So, if you own a phpBB forum... Check this out.