Question 1

Is Letta better than DSPy?

Accepted Answer

It depends on your use case. Letta is known for Build stateful AI agents with long-term memory, while DSPy Programming framework for LLMs — optimize prompts with code, not strings. See our full comparison above for a detailed breakdown.

Question 2

Is Letta free?

Accepted Answer

Letta pricing: Free (open-source) + Cloud.

Question 3

Is DSPy free?

Accepted Answer

DSPy pricing: Free (open-source).

Question 4

What are the main differences between Letta and DSPy?

Accepted Answer

Letta and DSPy differ in features, pricing, and platform support. Letta: Build stateful AI agents with long-term memory. DSPy: Programming framework for LLMs — optimize prompts with code, not strings. See the full side-by-side comparison above for details.

Feature	Letta	DSPy
Category	AI Agent Frameworks	Developer Tools
Pricing	Free (open-source) + Cloud	Free (open-source)
GitHub Stars	13k	✓ More stars 22k
Platforms	Linux, macOS, Docker	—
Key Features	✓ Long-term memory ✓ Stateful agents ✓ Tool use ✓ Multi-model ✓ Self-editing memory
Pros	+ Solves long-term memory problem + Self-editing memory + Stateful agents + Multi-model support + Active research backing	+ Systematic prompt optimization + Composable and testable LLM programs + Works with any LLM provider + Backed by Stanford NLP
Cons	− Complex memory management − Performance overhead − Rebranding confusion − Still experimental	− Steep learning curve − Different paradigm from traditional prompting
Tags	memorystatefulagentsopen-source

LettavsDSPy

Letta

DSPy

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