--- title: "CrewAI vs Letta: Which is Better in 2026? | App Stack Builder" description: "CrewAI vs Letta compared for 2026 — pricing, free tiers, features, pros & cons. See which agent framework tool is the better fit for your startup." source: https://appstackbuilder.com/compare/crewai-vs-letta retrieved: 2026-10-29 --- ![](https://www.google.com/s2/favicons?domain=crewai.com&sz=128) vs ![](https://appstackbuilder.com/logos/letta.png) # CrewAI vs Letta: Which is Better in 2026? Agent Framework Choosing between [CrewAI](https://appstackbuilder.com/tools/crewai) and [Letta](https://appstackbuilder.com/tools/letta)? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack. CrewAI is for: Python teams that want to stand up a multi-agent workflow quickly using roles, goals and tasks rather than a graph. Letta is for: Teams building agents that must remember users and context across sessions and restarts, with memory as the core design. Quick verdict There’s no single winner; pick on your constraint. Choose CrewAI if you want a three-to-five-agent workflow running with little code. Choose Letta if your agent must remember users and past sessions over weeks or months. ## CrewAI vs Letta — Side by Side | | CrewAI | Letta | | --------------------- | ----------------------------------------------------------------- | ------------------------------------------------------------------------ | | Category | Agent Framework | Agent Framework | | What it is | Code library: role-based multi-agent framework | Agent server and SDKs: agents with persistent memory | | Languages | Python | Python and TypeScript SDKs | | Licence | MIT | Apache 2.0 | | Managed / paid option | CrewAI AMP: free Basic (50 executions/month), Enterprise on quote | Letta API: free tier, Pro $20/month plus usage | | Project status | Active; 1.x | Active | | Pricing | Free · paid plans by quote | Free · paid from $20/mo | | Starting price | Free tier available | Free tier available | | Free tier | ✓ | ✓ | | Rating | 4.4 | 4.0 | | Best for | Agent Framework — multi-agent crews, fast prototyping, Python | Agent Framework — long-term memory, stateful agents, self-host or hosted | ## Pros & Cons ![](https://www.google.com/s2/favicons?domain=crewai.com&sz=128) [CrewAI](https://appstackbuilder.com/tools/crewai) * ✓Intuitive multi-agent model * ✓Fast to prototype crews * ✓Open-source * ✓Growing community * ✗Younger ecosystem * ✗Less low-level control than LangGraph ![](https://appstackbuilder.com/logos/letta.png) [Letta](https://appstackbuilder.com/tools/letta) * ✓Memory is the design centre, not an add-on * ✓Agents survive restarts with state intact * ✓Comes from the MemGPT paper * ✗Younger project with a moving API * ✗Memory model is opinionated ## Key Features Compared ### CrewAI * ✓Role-and-task “crews” of collaborating agents * ✓Flows for event-driven, step-by-step control * ✓CrewAI AMP for managed deployment: free Basic plan (50 executions a month), Enterprise on quote * ✓Self-hosted enterprise option (CrewAI Factory) * ✓MIT licence ### Letta * ✓Persistent, self-editing agent memory (from the MemGPT research) * ✓Agents keep their state across restarts * ✓Self-hosted server, or the hosted Letta API * ✓Hosted plans: free tier and Pro at $20 a month with pay-as-you-go usage * ✓Letta Code, an open-source coding agent with memory across sessions * ✓Apache 2.0 licence ### Choose CrewAI if… * ✓You want a three-to-five-agent workflow running with little code. * ✓Your team thinks in roles and handoffs rather than state machines. * ✓You may later want a managed platform with SSO and access controls. [CrewAI review & pricing ](https://appstackbuilder.com/tools/crewai) ### Choose Letta if… * ✓Your agent must remember users and past sessions over weeks or months. * ✓You want agents that keep state when the process restarts. * ✓You want the choice of self-hosting or a hosted API. [Letta review & pricing ](https://appstackbuilder.com/tools/letta) ## Frequently Asked Questions Is CrewAI better than Letta?⌄ There’s no single winner; pick on your constraint. Choose CrewAI if you want a three-to-five-agent workflow running with little code. Choose Letta if your agent must remember users and past sessions over weeks or months. What is the difference between CrewAI and Letta?⌄ What it is — CrewAI: Code library: role-based multi-agent framework. Letta: Agent server and SDKs: agents with persistent memory. Languages — CrewAI: Python. Letta: Python and TypeScript SDKs. Licence — CrewAI: MIT. Letta: Apache 2.0\. Managed / paid option — CrewAI: CrewAI AMP: free Basic (50 executions/month), Enterprise on quote. Letta: Letta API: free tier, Pro $20/month plus usage. Project status — CrewAI: Active; 1.x. Letta: Active. CrewAI vs Letta: which is cheaper?⌄ CrewAI pricing: Free · paid plans by quote. Letta pricing: Free · paid from $20/mo. Confirm current pricing on each tool's official site, as plans change. Which is rated higher, CrewAI or Letta?⌄ In our catalog, CrewAI rates 4.4 out of 5 and Letta rates 4.0 out of 5, so CrewAI has a slight edge on reviews. When should I skip both CrewAI and Letta?⌄ Skip CrewAI if you need fine control over individual state transitions. LangGraph exposes them. Skip Letta if you only need short-lived task agents. A lighter SDK is simpler. Sources · tool facts checked October 2026 1. 1.[CrewAI pricingcrewai.com ](https://www.crewai.com/pricing) 2. 2.[Letta Code (Letta docs)docs.letta.com ](https://docs.letta.com/letta-code) See more options in our guide to the [best agent framework tools for startups](https://appstackbuilder.com/categories/agent-framework). ## Still not sure which to pick? Get a free, AI-powered tech stack — including the best agent framework pick for your budget and team — in 60 seconds. [Build my stack free ](https://appstackbuilder.com/build-stack)