Self-hosted app marketplaces

Self-hosted marketplaces — Magento Marketplace, WooCommerce Marketplace, PrestaShop Addons, Odoo Apps — sit on top of open-source, self-hostable core platforms, so extensions can in principle be distributed and installed outside the official store entirely. That openness gives developers deep, code-level access to the host’s internals that a fully managed SaaS platform would never expose.

The cost is a more fragmented deployment landscape: your extension needs to work across whatever hosting environment and platform version each merchant runs, rather than one controlled SaaS runtime. All four platforms here authenticate with API keys rather than OAuth, reflecting their self-hosted, less multi-tenant-by-default architecture.