It’s an interesting question. As Jed notes, TiddlyWiki’s nature means there is no direct way to measure the number of people actively using it, but there are some indicators that can help drive estimates.
For example, we can measure the number of distinct people who have posted to the two TiddlyWiki mailing lists in, say, the last year. Then the question is how big a slice of the total users are represented by the people who post. I’d suggest that it must be at least one order of magnitude (ie for every individual posting to the groups there must be more than 10 individuals using TiddlyWiki without posting about it). In fact, I’d suggest that the hurdles to posting on the groups are quite high:
* Having a Google account, and being prepared to use it
* Ability to write in English
* Being happy to sacrifice some anonymity
My personal feeling is that the people who post on the groups might represent something between a hundredth and a thousandth of the overall, global population of active users.
As it happens, there’s no easy way to get Google Groups to reveal the number of distinct posters, but we do get figures for overall membership of the group:
5763 members of the main TiddlyWiki list
1576 members of the TiddlyWikiDev list
Presumably all the members of TiddlyWikiDev are also members of the main group, so one might take the 5.7K people as being between 1% and 10% of the overall user population, giving us an estimated user base of between 50,000 to 500,000 people.
There are a few other numbers available:
* As Jed says, there are Google Analytics stats for
tiddlywiki.com, but that doesn’t seem helpful
* GitHub activity maybe gives an insight into developer engagement with TiddlyWiki, but ignores the people who purposely avoid it
* Search engines like Google could be used to try to count the number of publicly exposed TiddlyWiki HTML files, from which one might extrapolate something about private usage
I’m no statistician, so possibly not a good person to do this kind of thing. In any case, I really love the decentralisation of TiddlyWiki, and the fact that people can use it entirely privately.
Best wishes
Jeremy