Agent Stack Directory

Agent Stack Directory is a checked directory of the infrastructure AI agents run on: cloud browsers, code sandboxes, memory layers, search and web data APIs, email, integrations, payments, voice, observability, frameworks and identity. It lists 54 tools in 11 categories, each summarized from the vendor's own site with a visible last-checked date. 131 side-by-side comparison pages, 54 alternatives pages and 11 buyer guides help developers pick a stack. Free to browse and free to list. The data is open at agentstackdirectory.com/data.json.