As a Japanese-speaking software engineer, I found that the company, connectFree, did too many suspicious acts as below:
- They are attempting to register "ZIG" [1] and "SiFive" [2] as trademarks in Japan. Only this is enough for me to see them as a trademark troll.
- Since Zen is a fork, Zen comes with Zig's (or its derived version of) standard library, but when they copied Zig's library source files, they removed the original copyright notice from each file header and replaced with "Copyright (c) 2018-2020 kristopher tate & connectFree Corporation." Sure, because it's MIT license, you can relicense, but is replacing the original copyright notice OK? Even if it's OK, why did they do that?
- I once attended a meetup where the CEO of connectFree, Kristopher, gave a presentation about Zen. He gave many reasons to use Zen, but most of them were Zig's features. Until someone pointed out in the meeting, Kristopher didn't mention or even imply that Zen is a fork of Zig. Many of my friends didn't actually know until this statement was made that Zen is a fork of Zig.
- connectFree recently published license terms for Zen (perhaps only in Japanese), and in the license they claimed that you are required to obtain a paid license to distribute a program even in the source code form as long as the program is written in Zen. I can't believe that you are able to force it, and it looks like Kristopher retracted the license later, but at least they tried to do that once. And you still need to buy a license to distribute a program in binary form if it's written in Zen and compiled with connectFree's Zen compiler.
- They are attempting to register "ZIG" [1] and "SiFive" [2] as trademarks in Japan. Only this is enough for me to see them as a trademark troll.
- Since Zen is a fork, Zen comes with Zig's (or its derived version of) standard library, but when they copied Zig's library source files, they removed the original copyright notice from each file header and replaced with "Copyright (c) 2018-2020 kristopher tate & connectFree Corporation." Sure, because it's MIT license, you can relicense, but is replacing the original copyright notice OK? Even if it's OK, why did they do that?
- I once attended a meetup where the CEO of connectFree, Kristopher, gave a presentation about Zen. He gave many reasons to use Zen, but most of them were Zig's features. Until someone pointed out in the meeting, Kristopher didn't mention or even imply that Zen is a fork of Zig. Many of my friends didn't actually know until this statement was made that Zen is a fork of Zig.
- connectFree recently published license terms for Zen (perhaps only in Japanese), and in the license they claimed that you are required to obtain a paid license to distribute a program even in the source code form as long as the program is written in Zen. I can't believe that you are able to force it, and it looks like Kristopher retracted the license later, but at least they tried to do that once. And you still need to buy a license to distribute a program in binary form if it's written in Zen and compiled with connectFree's Zen compiler.
[1] https://www.j-platpat.inpit.go.jp/c1800/TR/JP-2020-078615/FF... [2] https://www.j-platpat.inpit.go.jp/c1800/TR/JP-2019-153075/A7...