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Switchain is a way to compare rates across different instant (non-custodial) exchanges. With the recent exchange hacks and growing privacy concerns, non-custodial exchanges are a good alternative to security and privacy focused crypto users.
I have used many crypto exchanges during last 3 years. Honestly, for people making their first steps into crypto, Switchain seems like a good match. Very easy to buy/sell and useful comparisons between rates of different exchanges.