Letta

Letta is an agent platform for building stateful AI agents with memory, tools, APIs, and persistent context. It is useful when developers want agents that remember information, use tools, and behave more like long-running software systems instead of one-off chatbot sessions. For FutureStack users, Letta is a strong growing SEO opportunity because agent memory and state management are important problems in AI product development. Many builders can create a demo agent, but making an agent that remembers, acts, and stays useful over time is much harder. Letta can support developer-built agents, research agents, coding workflows, assistants, and products that need persistent context. Its API pricing page lists a $20 per month API plan, active-agent billing, tool execution billing, pay-as-you-go LLM usage, and enterprise options. This listing helps FutureStack cover the infrastructure layer behind serious AI agents. It is best for developers and founders building agent systems that need memory, tools, API access, model flexibility, and production-oriented state management.