Based on our record, Shift4 Payments seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Nerdwallet.com has a nice list of them. I only have experience with square though. I know you can resell shift4.com. But I don't know the requirements. Shopify has a POS as well and I am sure there are TONS of users on here using it. Source: over 2 years ago
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