Ning claims to have 71,531 social networks so far. Examples of Ning-based social networks are the Smashing Pumpkins SN (with 450 members) and Rawkus (a hiphop community with 3,500 members).

PeopleAggregator

One of the first custom social network services was Marc Canter's PeopleAggregator (disclosure: I used to do some consulting work for PA a year or so ago). Marc Canter has long held a vision for, and evangelized on his blog and at events, an open social network service - with an emphasis on open. It's fair to say that Ning has muscled in on this market and gotten more press than PeopleAggregator over the past year or two. Nevertheless, PeopleAggregator is a solid offering and has implemented many of the ideas and features that Canter has been talking about for years - for example the notion of an "identity hub". It is both an open source Social Network solution that can be downloaded and even forked, while at the same time being a white label offering and a free hosted service. PeopleAggregator has a mix of free and paid options. See our post a year ago for more details.

Many PA social networks are white label, but a couple of public examples are GT Channel and Connect at EconSM.

vibEngine

The third service we'll discuss here is vibEngine, from Vibe Capital. Originally based in Perth, Australia, the founders Clay and Rachel Cook are now firmly planted in Silicon Valley - in fact right down the road from Mr Techcrunch himself! Perhaps they figured that to compete with Andreessen and his formidable Silicon Valley network, they needed to be at the center of the action too.

The main difference between Ning and vibEngine is that Ning is a free, automated and easy-to-use solution, whereas vibEngine styles itself as a "professional tailored solution". In other words, vibEngine is a white label offering (it's not free) and they will help set up custom social networks for their customers. PeopleAggregator is a mix between the two. Another subtle difference with vibEngine is that it specializes in providing "ranked-advice communities".

I spoke to Clay Cook about vibEngine, because at first I couldn't see how they are competing with Ning or even PeopleAggregator - as it doesn't have a free offering. Clay explained that their aim is "to build many wholly owned subsidiaries" that use the vibEngine technology. They also plan to license vibEngine to large existing websites and startups. Currently they have 2 wholly owned subsidiaries - Minti (a social network for parents) and Refurber (ironically, a social network for DIY folks), both of which were founded by Clay and his wife Rachel. The pair also recently launched a partner license site at buildinginlondon.com (a social network for London homeowners). There are plans for more such partnerships and licensed sites.

Conclusion

What all of these services have in common is that they provide a bundle of tools for creating a social network - complete with all the 'web 2.0' features you can think of, such as blogs, photo sharing, video sharing, RSS, tags, personal messaging, email, friends lists, discussions, privacy options, etc. There is no real 'winner' when comparing the three services we've mentioned in this post - Ning, vibEngine, PeopleAggregator. Each has its specific market and each is differentiated well from the others. It's certainly an interesting market though and, with the social networking craze showing no signs of slowing, one that will only grow.

What do you think of each of these services? If you have used one (or more) of them, please leave a comment telling us about your experience. Indeed, how many custom-made social networks are you currently a member of?