oSplit	Co-op	Group Buy	Crowd Funding	E-commerce
Seller	Open to all	Co-op leader	Only owner*	Anyone who pass screening	Open to all
Buyer	limited to friend, friend of friend or nearby	member only	open to all
Tier Price	depending on group's purchase	flat price			depending on one's purchase
Reputation	review, friend connection & vouch	None	review only
Delivery	pick up, meet in person, shipping		shipping only
For Sharing	yes	no
Conditional Selling	count, money or bundle	count / money	count	money	no conditional
Get All Count	up to a certain number		get exact number
Platform Fee	free - 1%	depends on platform, approximately free - 5%
Payment Processing Fee	none	none - 2.99% + 49c	2.99% + 49c
Payment	verified manually	verified manually / automatically	verified automatically
Payment Method	transfer, cash, existing balance	transfer, cash credit card, online payment	credit card, online payment
Product	any product: - including online and offline - a single undivided item - with/without the store's participant	usually food and offline	virtually any product online and offline - the seller has to accept the negotiation	new/unique items	virtually any product
Product Price	cheaper		cheapest for specific items - this requires huge number of buyers	unique items - no comparison	standard price

*some group buy limits where you can buy the product (and collect the payment), to ensure that the items are delivered as promised