# Letta v0.16.8: what's new, verdict & setup Canonical: https://theagenticweekly.com/tools/letta · Released: 2026-05-14 · Last verified: 2026-10-25 · Evidence: Reported (not run by us) · Vendor: Letta · Official site: https://www.letta.com/ > Platform and open-source framework for stateful agents that keep and improve memory across sessions. ## Verdict **Platform and open-source framework for stateful agents that keep and improve memory across sessions.** Good for: - Agents that must remember across sessions Skip if: - You want a stateless simple chatbot Status: Reported. Written from official release notes and docs; we have not run this release ourselves. Pricing: Official page, dated. Read from letta.com/pricing on 2026-10-25. (checked 2026-10-25) ## Best for - [Best AI tool for agent building](https://theagenticweekly.com/best/agent-building) (#-): Stateful agents with persistent memory. ## Key facts Letta's pricing page lists a Free plan at $0, a $20 per month plan, and usage-based items such as $0.10 per active agent per month and $0.00015 per second of tool execution, plus a Teams plan at $20 per seat per month and custom Enterprise. The repository is Apache-2.0. - License: Apache-2.0 (per GitHub) - Platforms: Cloud platform, CLI and open-source server - Pricing model: Freemium - Free tier: Free: $0; includes limited agents and LLM requests with rotating free models - Paid plans: $20 per month plan; Teams $20 per seat per month; usage items such as $0.10 per active agent per month; Enterprise custom - GitHub: letta-ai/letta: 25,254 stars on 2026-10-25, last push 2026-10-18 - Latest release we saw: v0.16.8, 2026-05-14 - How to start: Sign up at letta.com or run the open-source server and create an agent from the docs. - v0.16.8 (2026-05-14): the newest release listed on the official page or repository when we read it on 2026-10-25. ## How to set it up: Get started with Letta These steps come from the vendor's own pages as read on 2026-10-25. We have not run Letta. 1. **Get access.** Sign up at letta.com or run the open-source server and create an agent from the docs. 2. **Check the limits and costs first.** Free: $0; includes limited agents and LLM requests with rotating free models. Paid: $20 per month plan; Teams $20 per seat per month; usage items such as $0.10 per active agent per month; Enterprise custom. Read from letta.com/pricing on 2026-10-25. ## Pros and cons Pros: - Apache-2.0 - Memory-first design Cons: - Credit-based usage can add up for long sessions ## Alternatives - [Mem0](https://theagenticweekly.com/tools/mem0): Open-source and hosted memory layer that lets agents remember users across sessions, with a free tier and published request quotas. - [LangGraph](https://theagenticweekly.com/tools/langgraph): Low-level framework for building long-running, stateful agents as graphs. - [CrewAI](https://theagenticweekly.com/tools/crewai): Python framework for orchestrating role-playing, autonomous AI agents that work as a crew. - [Langflow](https://theagenticweekly.com/tools/langflow): MIT-licensed visual builder for AI agents and MCP servers with a very large GitHub following. - [Botpress](https://theagenticweekly.com/tools/botpress): Customer-support AI agent platform with a free plan and conversation-based paid plans. - [Gumloop](https://theagenticweekly.com/tools/gumloop): Agent builder for teams; plans start at $37 per month with 20k included credits. - [Lindy](https://theagenticweekly.com/tools/lindy): AI 'employee' builder that connects to your tools; Free plan with $50 in credits that last 7 days, then credit-based plans. - [Microsoft Copilot Studio](https://theagenticweekly.com/tools/copilot-studio): Microsoft's platform for creating and managing custom agents, workflows and apps with no code. - [Pydantic AI](https://theagenticweekly.com/tools/pydantic-ai): Python agent framework built on Pydantic types, covering agents, realtime voice, image generation and embeddings. - [Relevance AI](https://theagenticweekly.com/tools/relevance-ai): Platform for specialist AI agents for sales, customer success, marketing and HR, with an embedded deployment team. - [Voiceflow](https://theagenticweekly.com/tools/voiceflow): Platform for chat and voice AI agents for customer experience teams. - [Vercel AI SDK](https://theagenticweekly.com/tools/vercel-ai-sdk): Vercel's TypeScript SDK that gives one API across many model providers, with streaming and agent helpers. ## FAQ ### What is Letta? Letta's pricing page lists a Free plan at $0, a $20 per month plan, and usage-based items such as $0.10 per active agent per month and $0.00015 per second of tool execution, plus a Teams plan at $20 per seat per month and custom Enterprise. The repository is Apache-2.0. ### Is Letta free? Free: $0; includes limited agents and LLM requests with rotating free models. Paid: $20 per month plan; Teams $20 per seat per month; usage items such as $0.10 per active agent per month; Enterprise custom. Read from letta.com/pricing on 2026-10-25. Checked 2026-10-25; prices change, so confirm on the vendor's page. ### What license is Letta under? Its license: Apache-2.0 (per GitHub). Read from the project's own pages on 2026-10-25. ## What we have not verified - Behavior in practice (we have not run this tool) ## Sources - [Letta](https://www.letta.com/) (fetched 2026-10-25) - [Letta pricing](https://www.letta.com/pricing) (fetched 2026-10-25) - [Letta repository (GitHub)](https://github.com/letta-ai/letta) (fetched 2026-10-25) ## How to cite Agentic Weekly, "Letta v0.16.8: what's new, verdict & setup", last updated 2026-10-25, https://theagenticweekly.com/tools/letta Keep the Reported or Tested label when you quote the verdict.