Agent Stack Directory

Directory of tools and infrastructure for building AI agents

#2 in Developer tools
Developer tools
AI agents
Free
Launched 1 Nov 2026

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About

Agent Stack Directory is a curated list of 84 tools across 13 categories that make up the infrastructure AI agents run on. It covers cloud browsers, code sandboxes, memory layers, web search APIs, email integrations, payments, voice platforms, observability tools, agent frameworks, and more. Each tool links to its official site, and every link is checked before publication.

The directory organizes tools by their role in the agent stack: browsers and computer use for web interaction, isolated sandboxes for safe code execution, memory systems for long-term context, search APIs for fresh data, email for agent communication, authentication and integrations, payments, voice capabilities, tracing and evals, frameworks for building agents, identity management, and durable execution engines. You can browse all 84 tools or filter by category.

Agent Stack Directory publishes new tools every Friday and maintains 243 side-by-side comparisons, including pricing tables for browsers and sandboxes checked as recently as October 2026. Sponsored placements are clearly labeled and kept separate from organic listings. The directory is free to use with no signup required.

Agent Stack Directory focuses only on infrastructure for shipping real AI agents, not demos. Every listing is verified against the vendor's official site, links are checked before publication, and sponsored content is always labeled. It organizes tools by their layer in the agent stack rather than by vendor.

Problem: Builders shipping AI agents need to find and compare the infrastructure tools that make agents work: browsers, sandboxes, memory, search, email and more. Finding these tools scattered across the web and comparing their features and pricing takes time.
Solution: Agent Stack Directory brings together 84 agent infrastructure tools in one place, organized by their role in the stack, with verified links and pricing comparisons so builders can find what they need quickly.

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