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Letta

ai agentsBest for: Individuals & Freelancers
Web

Open-source framework for building stateful AI agents with persistent memory

★★★★4.5G2
202310k+ GitHub starsFree plan
Expert Take

Few ai agents tools offer as much without a credit card as Letta does - the free plan covers the core workflow with standout capabilities like Persistent Memory, Stateful Agents, Memory Editing, which is why it's earned a loyal base of 10k+ GitHub stars users. At 4.5/5, it's one of the highest-rated free options in its class. Teams on a tight budget will be hard-pressed to find a more capable no-cost alternative.

· Expert analysis by ComparEdge Editorial, Editorial Team

Quick Verdict

One of the most capable ai agents platforms available for free, trusted by Individuals & Freelancers.

Best for: Individuals & Freelancers From Free

Top Pros

  • Best framework for persistent memory agents
  • Open source and transparent
  • Unique MemGPT architecture

Watch Out For

  • More complex than simple agent frameworks
  • Requires understanding of memory architecture

Frequently Asked Questions

Yes, Letta offers a free plan.
Reviewed by ComparEdge EditorialExpert verified·Last updated May 13, 2026·Our methodology