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OpenThena

openthena.com

Free plan WebLinuxAPISelf-hosted
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Spec score 7.7 #52 of 65 in AI chatbots and assistants

Spec sheet

Product
OpenThena is an open-source AI assistant with a streaming chat experience.Read 11 Oct 2026 · openthena.com
Deployment
The documentation describes one-click Vercel deployment and self-hosting.Read 11 Oct 2026 · openthena.com
Free plan
YesRead 21 Sep 2026 · openthena.com
Privacy
The maker says it has no database, accounts, message-content server logs, analytics, fingerprinting, or advertising cookies.Read 11 Oct 2026 · openthena.com
License
OpenThena is MIT licensed and described as auditable and open source.Read 11 Oct 2026 · openthena.com
API limit
The chat API accepts at most 50 messages per request.Read 5 Oct 2026 · openthena.com
Chat storage
Chat history is saved in the browser's localStorage and can be erased by clearing a conversation or browser data.Read 11 Oct 2026 · openthena.com
Cost limit
OpenThena itself is free; users pay only for the model provider they choose.Read 11 Oct 2026 · openthena.com
Default model
It uses Xiaomi MiMo (mimo-v2.5-pro) by default, and the model can be changed through an environment variable.Read 11 Oct 2026 · openthena.com
Gateway
Its LiteLLM-style gateway provides an OpenAI-format interface to models.Read 11 Oct 2026 · openthena.com
History storage
Chat history is stored in browser localStorage and can be erased by clearing a conversation or browser data.Read 5 Oct 2026 · openthena.com
Local setup
The quickstart requires Node.js 18+ and a Xiaomi MiMo API key to run locally.Read 5 Oct 2026 · openthena.com
Model
Xiaomi MiMo v2.5 is the default model, and the provider can be changed through configuration.Read 5 Oct 2026 · openthena.com
Model compatibility
The FAQ says any OpenAI-compatible endpoint works, including a self-hosted LiteLLM proxy or a local model.Read 11 Oct 2026 · openthena.com
Provider data
Prompts are sent to the configured upstream model provider, whose data handling is governed by that provider’s terms.Read 5 Oct 2026 · openthena.com
Provider data handling
Prompts are sent to the configured upstream model provider, whose data handling is governed by that provider's terms.Read 11 Oct 2026 · openthena.com
Self-hosting
OpenThena is a Next.js app that can run anywhere Node runs.Read 11 Oct 2026 · openthena.com
Streaming
Responses stream token by token.Read 11 Oct 2026 · openthena.com

Plans and prices

OpenThena Free Free; model provider charges may apply OpenThena itself is free · pay only for the model provider you use Read 11 Oct 2026 · openthena.com

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