Question 1

Is Open WebUI better than Letta?

Accepted Answer

It depends on your use case. Open WebUI is known for Beautiful self-hosted ChatGPT-like interface for any LLM, while Letta Build stateful AI agents with long-term memory. See our full comparison above for a detailed breakdown.

Question 2

Is Open WebUI free?

Accepted Answer

Open WebUI pricing: Free (open-source).

Question 3

Is Letta free?

Accepted Answer

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

Question 4

What are the main differences between Open WebUI and Letta?

Accepted Answer

Open WebUI and Letta differ in features, pricing, and platform support. Open WebUI: Beautiful self-hosted ChatGPT-like interface for any LLM. Letta: Build stateful AI agents with long-term memory. See the full side-by-side comparison above for details.

Feature	Open WebUI	Letta
Category	Chat Interfaces	AI Agent Frameworks
Pricing	Free (open-source)	Free (open-source) + Cloud
GitHub Stars	✓ More stars 65k	13k
Platforms	macOS, Linux, Windows, Docker	Linux, macOS, Docker
Key Features	✓ Ollama integration ✓ Multi-model ✓ RAG ✓ Web search ✓ Voice input/output ✓ Plugins ✓ User management	✓ Long-term memory ✓ Stateful agents ✓ Tool use ✓ Multi-model ✓ Self-editing memory
Pros	+ Feature-rich ChatGPT alternative + Supports Ollama + OpenAI APIs + Document upload and RAG + Multi-user with auth + Very active development	+ Solves long-term memory problem + Self-editing memory + Stateful agents + Multi-model support + Active research backing
Cons	− Requires Docker for easy setup − Can be slow with large documents − Plugin ecosystem still growing − Resource intensive	− Complex memory management − Performance overhead − Rebranding confusion − Still experimental
Tags	open-sourcechatuiollamaself-hosted	memorystatefulagentsopen-source

Open WebUIvsLetta

Open WebUI

Letta

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