chainer is queued for analysis. Crawling candidates and ranking them takes a few minutes. This page updates itself when the list exists — you can also come back later.
What is known so far comes from the other direction:
These projects were analysed and named chainer among their alternatives. The relationship is not symmetric — how chainer rates them is a separate judgement, made when chainer is analysed in its own right.
calls chainer “choose for legacy Chainer codebases or if you specifically need the original define-by-run API that predates PyTorch.”
Tensors and Dynamic neural networks in Python with strong GPU acceleration
calls chainer “Previous-generation deep learning framework with its own define-by-run API, still usable if you need a non-PyTorch historical stack.”
The fastai deep learning library