Question 1

Is Letta better than Modal?

Accepted Answer

It depends on your use case. Letta is known for Build stateful AI agents with long-term memory, while Modal Serverless platform for running AI and ML workloads. 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 Modal free?

Accepted Answer

Modal pricing: Pay-per-use + $30 free/mo.

Question 4

What are the main differences between Letta and Modal?

Accepted Answer

Letta and Modal differ in features, pricing, and platform support. Letta: Build stateful AI agents with long-term memory. Modal: Serverless platform for running AI and ML workloads. See the full side-by-side comparison above for details.

Feature	Letta	Modal
Category	AI Agent Frameworks	LLM APIs & Inference
Pricing	Free (open-source) + Cloud	Pay-per-use + $30 free/mo
GitHub Stars	✓ More stars 13k	—
Platforms	Linux, macOS, Docker	Web
Key Features	✓ Long-term memory ✓ Stateful agents ✓ Tool use ✓ Multi-model ✓ Self-editing memory	✓ Serverless GPU ✓ Container orchestration ✓ Cron jobs ✓ Web endpoints ✓ Fine-tuning
Pros	+ Solves long-term memory problem + Self-editing memory + Stateful agents + Multi-model support + Active research backing	+ Serverless GPU with simple Python API + $30/mo free credits + Web endpoints and cron jobs + Fast cold starts + Great developer experience
Cons	− Complex memory management − Performance overhead − Rebranding confusion − Still experimental	− Python-only − Vendor lock-in risk − Debugging can be tricky − Pricing opaque for large workloads
Tags	memorystatefulagentsopen-source	serverlessgpucloudinfrastructure

LettavsModal

Letta

Modal

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