CrewAI vs Letta (formerly MemGPT)
Detailed side-by-side comparison to help you choose the right tool
CrewAI
🔴DeveloperAI Agents
Open-source Python framework for orchestrating role-playing, autonomous AI agents that collaborate as a 'crew' to complete complex tasks.
Was this helpful?
Starting Price
FreeLetta (formerly MemGPT)
🔴DeveloperAI Knowledge Tools
AI memory platform for building stateful agents that can preserve selected context across sessions, manage long conversations, and support applications that need durable agent memory.
Was this helpful?
Starting Price
Free ($0/month)Feature Comparison
Scroll horizontally to compare details.
💡 Our Take
Choose Letta for applications where a single assistant or agent must remember preferences, prior work, and long-running context. Choose CrewAI if you are modeling role-based teams of agents and care more about task delegation than memory infrastructure.
CrewAI - Pros & Cons
Pros
- ✓Most opinionated multi-agent framework — easy to read, easy to maintain
- ✓Free tier includes the full visual Studio editor and 50 executions/month
- ✓Trusted by 63% of the Fortune 500 according to CrewAI
- ✓MCP-native: crews can consume and expose MCP tools
- ✓Enterprise tier has FedRAMP High and dedicated VPC options that competitors lack
- ✓Active GitHub community and frequent releases
Cons
- ✗Less flexible than LangGraph if you need fine-grained control over state transitions
- ✗Free tier capped at 50 workflow executions per month — easy to hit
- ✗Enterprise pricing is sales-led with no public numbers, making budget planning hard
- ✗Hierarchical process can burn tokens fast with a chatty manager agent
Letta (formerly MemGPT) - Pros & Cons
Pros
- ✓Purpose-built for persistent agent memory, making it a stronger fit than stateless chat tools for assistants that need to remember users, preferences, and prior work across sessions.
- ✓Supports both cloud-hosted and self-hosted deployment according to the existing directory record, giving technical teams a path for managed usage or more direct infrastructure control.
- ✓Model-agnostic positioning allows teams to design around an agent memory layer instead of tying all context and behavior to a single LLM provider.
- ✓Its virtual context approach addresses a concrete limitation of LLM applications: important information can outlive the immediate context window instead of being lost between sessions.
- ✓The existing listing identifies 5 core feature areas, including persistent memory, virtual context, self-editing agents, document analysis beyond context limits, and multi-session conversation tracking.
- ✓Compared to broader agent frameworks in our directory, Letta has a clearer focus on long-running, stateful agents rather than general workflow orchestration.
Cons
- ✗The provided scraped website content did not expose complete current customer counts, founding year, or integration counts, so buyers should verify commercial details before procurement.
- ✗Persistent memory adds design and governance complexity because teams must decide what agents should store, retrieve, update, or forget over time.
- ✗Usage-based charges on the API Plan, including $0.10 per active agent per month and $0.00015 per second for server-side tool execution, can make costs harder to forecast for high-volume applications.
- ✗Self-hosted deployment can require engineering resources for installation, model provider configuration, monitoring, upgrades, and data management.
- ✗Letta is more specialized than broad frameworks like LangChain or Semantic Kernel, so teams that mainly need general tool orchestration may find its memory-first focus narrower.
Not sure which to pick?
🎯 Take our quiz →🔒 Security & Compliance Comparison
Scroll horizontally to compare details.
Price Drop Alerts
Get notified when AI tools lower their prices
Get weekly AI agent tool insights
Comparisons, new tool launches, and expert recommendations delivered to your inbox.
Ready to Choose?
Read the full reviews to make an informed decision