OpenBazaar is an open source project developing a protocol for e-commerce transactions in a fully decentralized marketplace. It uses the cryptocurrency bitcoin and was inspired by a hackathon project called DarkMarket.
License: Open Source
eBay is a centralized marketplace that offers a wide range of products and services with robust buyer protections, but it comes with higher fees and strict policies. OpenBazaar, on the other hand, provides a decentralized alternative that emphasizes privacy and freedom from fees, but it has a smaller user base and may be less accessible to average users.