anyone using or knows ? are there another visual novel engine except renpy?
Yes, among others,
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,
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, and
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. Then there's the engines purely dedicated to web VN, like
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, and those that are more multitask, while still being used for VN, like
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or
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. And obviously
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,
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and
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, that are really overkill for a VN, but punctually used for that.
Those being only the most known engines (I hope I'm not the only one to know all them), I'm sure that just asking google or whatever search engine you prefer, you would easily find few dozen more names.
This being said, Ren'Py is the best compromise between the possibilities offered by the engine, the simplicity to use it, and how deeply you can make it react exactly like you want. The others are either easier to use, but way more limited in what they offer or in the control you have over it, or way more powerful, but also more complex to use if you don't know what you're doing.