Who is using it
See the sections after this for references of usage.
Old Website References
The original website stated thatbacktrader is used in (at least):
2 Eurostoxx50 Banks
6 Quantitative Trading Firms
That was long ago and a lot more are known to the author, including othertype of trading companies in sectors like"Energy Trading".
Why were no names given?
I never asked
They never asked
Can you then sustain those claims?
Already asked (and answered) inReddit - [Question] How popular is Backtraderon thissub?
Let's quote the answer from that thread.
Quote
No. There is not a list. This is actually outdated: the number of banksremains at2 (there may be more, but I don't know it), but there are morethan 6 firms using it for internal purposes, including for examplecompanies working in energy markets, due to thecompensation featurewhich allows buying and selling different assets which compensate eachother (this is probably not available inzipline) which allows to modelusing spot and futures prices (this is a particularity of energy markets toavoid having the actual goods delivered to you)
The thing here is that one would have to defineusage. I can for examplequote what someone from one of those banks told me:"we use backtrader toquickly prototype our ideas and backtest them. If they prove to be what weexpected and after further refinement, they will be rewritten in Java and putinto our production system"
This is actually the same scheme which one of the Quant firms (which Ipersonally visited) used: prototyping inbacktrader and production inJava.
As you may imagine I don't track the lifes of those usingbacktrader, soit may also be that some of the banks and companies decided to no longerusebacktrader.
I do also guess that some banks and quant firms usezipline following thesame scheme.