Today: Amazon, WooCommerce, Shopify, eBay, Etsy, and OpenCart, all native connections. We are adding BigCommerce, Walmart, and Magento based on customer demand; have a platform you need, let us know.
Marketplaces connect through their official APIs on your own account, and self-hosted stores use our plugin at the event source, the integration-method difference explained. Picking your next channel is a strategy question too, the channel-fit guide covers it.