What is the difference between Buddhism, Hinduism and Solipsism? What is the difference between Buddhism, Hinduism and Solipsism? Do all these religions say that other people have no minds? If all these religions are like solipsism, then are all buddhists solipsists?
Solipsism is not a religion or philosophy. It's just a speculative idea: &quot;hmm how do we know the world we experience actually exists? What if our senses and minds are fooling us and nothing else exists at all?&quot;. I don't think there are many people, if any, who seriously believe in solipsism and make it one's guiding principle. It's just a philosophical joke people are playing with as they study philosophy.
Note how Solipsism doesn't say &quot;other minds don't exist&quot;, no, - instead it says &quot;I definitely exist because I can think and experience stuff, but there's no proof that the rest of the world exists other than in my mind&quot;.
Hinduism is not a concrete thing. It's a huge collection of traditions, myths, rituals, and teachings that developed over millennia in many different places on Indian subcontinent. There's no single system there. But in context of your question we can say that most people who roughly belong to this group, called Hindus, believe that people have souls and these souls are parts of the Universal Soul (call it God or Brahma or whatever). Some of the people in this group also believe that this Universal Soul is sleeping and this world is a dream this Universal Soul is dreaming up. Again this idea of the world being God's dream is more like a metaphor or beautiful myth, I don't think all Hindu people take it literally (although some might).
There's no teaching in Hinduism that says that other minds don't exist or the world doesn't exist at all. They usually say this world of separation is an illusion or like a dream, and when the soul wakes up it realizes its unity with God or Brahman, and sees everything correctly as it really is. Note how they don't say nothing else exists, they say the awakened soul sees the true reality, and in this true reality everything is God, basically.
So in solipsism you are the only reality and everything else is illusion while in Hinduism all separate things are illusion and the unity of Everything with God is the true reality.
Now, Buddhism is not a single thing either. It's a huge collection of ideas and teachings that developed from one person's teachings. People were trying to implement this teaching, interpret it, and understand its implications - and this original teaching along with its historical interpretations and implications is what we now call Buddhism.
Many Buddhists (although not all!) will say that soul does not exist, this makes them very different from Hindus who strongly believe in soul. (There are some Buddhist whose faith is more like a hybrid between Buddhism and Hinduism but we can omit them for simplicity). Moreover, most Buddhists do not believe in Universal God or Universal Soul, whatever you call it. In this sense, Buddhists are more like the modern scientific materialists - they think the world works according to some kind of natural laws. Not necessarily same exact laws we know from science but laws nevertheless, not a God dreaming things up.
Now when it comes to mind, most Buddhists will say that mind also works according to some laws, it develops and changes based on causes and conditions - not randomly. When this mind develops, it comes up with all kinds of ideas about the world, including the idea of &quot;I&quot; or &quot;self&quot; - but according to Buddhism all these are just ideas, just concepts the mind develops to approximately understand and analyze its experiences.
So in Buddhism we don't say other minds don't exist or the world doesn't exist, no. We say, the reality or the world we experience is an interpretation we make based on our experience, prejudices, on where we focus our attention and on our emotional state.
In Buddhism we often say that this world is like an illusion or our life is like an illusion, meaning that it seems to look a certain way until you look closely. This doesn't mean the world doesn't exist, it just means when our minds are childish our world is primitive, and as our minds mature - our world becomes much more deep, nuanced, more complex, and a more accurate representation of how-things-really-are.
As you can see, Solipsism, Hinduism, and Buddhism are three very different things. None of them says that other minds do not exist. Only Solipsism says the world outside our mind may not exist. Hinduism and Buddhism both say our experience of the world is not accurate. Hinduism says, in reality everything is one with God, while Buddhism says that every experience of a certain subjective world is a result of causes and conditions.
Solipsism is just a toy philosophy, it's not meant to be a real belief.
Hinduism teaches (among other things) how to strive for unity with God, both in this life and beyond.
In Buddhism we learn how our lives are shaped by causes and conditions, we learn how we create these causes by our actions, we learn how mind works, we learn how it develops illusions and superficial ideas about the world, we learn how these superficial ideas keep us entrapped in certain subjective realities, going in vicious cycles - and we learn how to liberate from all that.