This topic covers the emerging ecosystem of autonomous AI agent marketplaces and the platforms that populate them. Marketplaces such as OpenAI Frontier and NEAR AI Agent Market aim to make agent discovery, distribution, and monetization straightforward, while a range of developer-focused and no-code tools enable creation, deployment, and operation of agents. Key categories include self-hosted/cloud-hosted agent platforms (AutoGPT), in-browser no-code builders (AgentGPT), web-native IDEs with hosting and assistants (Replit), AI-native IDEs and agent frameworks (Windsurf, formerly Codeium), integrated IDE copilots (JetBrains AI Assistant, GitHub Copilot), and enterprise visual platforms for designing and operating agents (MindStudio). Relevance in early 2026 stems from broad adoption of agentic workflows across software development, automation, and business processes, plus growing demand for marketplaces that handle discovery, billing, provenance, and governance. Current trends include multi-model support and orchestration (agents composed of specialized models), template libraries and live previews for faster iteration, and a tension between cloud-hosted convenience and self-hosted control—important for privacy, compliance, and reliability. Tool-level differences matter: AutoGPT emphasizes customizable automation workflows and self-hosting; AgentGPT prioritizes quick, no-code agent creation; Replit and Windsurf integrate coding, hosting, and agent assistants to keep developers “in flow”; MindStudio targets rapid enterprise deployment with operational controls; JetBrains and GitHub Copilot focus on in-context developer productivity and agentic workflows inside IDEs. Evaluating marketplaces means assessing listings, runtime and billing integrations, safety and auditing features, and how well they compose with the platforms developers use. This topic helps compare those trade-offs and choose the right marketplace-plus-platform combination for specific build, deploy, and governance needs.