Best Alternatives to Letta
Explore 19 top-rated alternatives to Letta in the ai agents category. Compare features, pricing, and find the perfect fit for your needs.
About Letta
Stateful AI agent platform from the MemGPT team, providing long-term memory, tools, and a managed runtime for production agents.
Free
Top Recommended Alternatives
CrewAI
AI Agents
From
FreeOpen-source Python framework for orchestrating role-playing, autonomous AI agents that collaborate as a 'crew' to complete complex tasks.
Key Strengths:
- ✓Most opinionated multi-agent framework — easy to read, easy to maintain
- ✓Free tier includes the full visual Studio editor and 50 executions/month
Microsoft AutoGen
Multi-Agent Builders
From
FreeMicrosoft's open-source framework for building multi-agent AI systems with asynchronous, event-driven architecture.
Key Strengths:
- ✓MIT-licensed open source with active development
- ✓Backed by Microsoft Research with strong academic foundations
LangGraph
AI agent framework
From
FreeLangGraph is LangChain's open-source framework for building stateful, durable, multi-agent workflows in Python and JavaScript with graph-based control flow.
Key Strengths:
- ✓Open-source library is MIT-licensed and runs anywhere without platform lock-in
- ✓Native checkpointing makes durable, resumable, human-in-the-loop agents straightforward
Microsoft Semantic Kernel
AI Agent Builders
From
FreeSDK for building AI agents with planners, memory, and connectors. - Enhanced AI-powered platform providing advanced capabilities for modern development and business workflows. Features comprehensive tooling, integrations, and scalable architecture designed for professional teams and enterprise environments.
Key Strengths:
- ✓Production-ready enterprise framework with robust session management and type safety features
- ✓Provider-agnostic architecture allows easy switching between LLM providers without code changes
Mem0
AI agent memory
From
$0/monthMemory infrastructure for AI agents and applications, available as an open-source framework and managed platform.
Key Strengths:
- ✓Purpose-built for AI agent memory.
- ✓Clear fit for persistent user and agent context.
More AI Agents Alternatives
Agent Zero
Open-source, general-purpose AI agent framework that runs in a Docker sandbox and learns by writing its own tools.
Learn MoreAgentScope
Open-source multi-agent platform from Alibaba's DAMO Academy for building LLM agents with visual workflows and runtime management.
Learn MoreMicrosoft Foundry Agent Service
Microsoft's full managed platform for building, deploying, and scaling enterprise AI agents with native integration into Microsoft 365, Azure services, and 1,400+ business systems through code-first SDK and visual portal experiences
From $2.50 per 1M input tokens (GPT-4o); pay-per-use with no orchestration fee
Learn MoreGoose (by Block)
Open-source, extensible AI agent from Block that runs on your machine and orchestrates LLMs, MCP tools, and developer workflows.
Learn MoreComposio
Tool-calling infrastructure for AI agents — 1,000+ pre-built integrations with managed OAuth, exposed natively as MCP servers.
From Free (up to 20,000 tool calls/month)
Learn MoreCua
Cloud desktops for AI agents — give Claude Code, Codex or any computer-use agent its own isolated macOS or Linux VM.
Learn MoreDust
Dust review 2026: enterprise AI platform from Paris for building governed agents grounded in Slack, Drive, Notion — features, pricing, pros, cons.
Learn MoreHermes Agent
Open-source self-improving AI agent framework by Nous Research with persistent memory, 40+ tools, and 135K+ GitHub stars.
Learn MoreInngest
Durable-execution platform for AI workflows and agents — write step-functions in TypeScript or Python, get retries, scheduling and observability for free.
From Free
Learn MoreLangflow
Open-source visual editor (acquired by DataStax/IBM) for building, prototyping, and deploying agentic LLM workflows with hundreds of pre-built components.
From Free
Learn MoreManus
General-purpose autonomous AI agent that browses the web, runs code, and completes long-horizon tasks end-to-end.
Learn MoreMastra
TypeScript-native framework for building AI agents, workflows, and RAG pipelines — from the team behind Gatsby.js.
From Free
Learn MoreSmithery
Smithery is the registry and hosted runtime for Model Context Protocol servers — discover, install and run MCP servers for Claude, Cursor, Windsurf and more.
Learn MoreToolhouse
Cloud platform for building, deploying, and scheduling persistent AI workers from chat — backed by hundreds of pre-built tools and full MCP support.
From Free
Learn MoreQuick Comparison
Why Consider Letta Alternatives?
While Letta is a popular choice in the ai agents category, exploring alternatives can help you find a tool that better matches your specific needs, budget, or workflow preferences.
Common reasons to explore alternatives include:
- Different pricing models or more affordable options
- Specific features that Letta may not offer
- Better integration with your existing tools
- Performance or user experience preferences
- Regional availability or support requirements
Compare the tools above to find the best fit for your specific use case.
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