Prompt Mixer

Freemium

A tool to create prompts and optimize AI development.

Prompt Mixer is an open-source desktop application for prompt engineering and AI development. It allows users to version, test, and manage prompt chains across different machine learning models and custom connectors. Designed for developers and teams, it supports secure data extraction and collaborative workflows with various pricing tiers including a free personal option (verified: 2026-01-29).

Jan 29, 2026
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Pricing: Freemium
Last verified: Jan 29, 2026
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Key facts

Pricing

Freemium

Use cases

Developers extracting or merging invoice data securely while monitoring the results after deployment (verified: 2026-01-29), Prompt engineers versioning and testing chains of prompts across different machine learning models (verified: 2026-01-29), Teams collaborating on prompt chains and synchronizing outputs across multiple devices (verified: 2026-01-29)

Strengths

The application functions as a desktop tool that allows users to keep, version, and test prompt chains locally (verified: 2026-01-29), Users can write and install custom connectors via GitHub links to integrate specific data sources or models (verified: 2026-01-29), The platform provides a free tier for personal use that includes all main functions and community support (verified: 2026-01-29)

Limitations

Accessing team collaboration features and device synchronization requires a paid subscription starting at twenty-nine dollars monthly (verified: 2026-01-29), Deploying prompts to API endpoints and utilizing SSO or SAML is restricted to the Enterprise tier (verified: 2026-01-29)

Last verified

Jan 29, 2026

Strengths

  • The application functions as a desktop tool that allows users to keep, version, and test prompt chains locally (verified: 2026-01-29)
  • Users can write and install custom connectors via GitHub links to integrate specific data sources or models (verified: 2026-01-29)
  • The platform provides a free tier for personal use that includes all main functions and community support (verified: 2026-01-29)

Limitations

  • Accessing team collaboration features and device synchronization requires a paid subscription starting at twenty-nine dollars monthly (verified: 2026-01-29)
  • Deploying prompts to API endpoints and utilizing SSO or SAML is restricted to the Enterprise tier (verified: 2026-01-29)

FAQ

What are the primary functions and capabilities of the Prompt Mixer desktop application?

Prompt Mixer is a desktop application designed for prompt engineering. It enables users to maintain, version, and test chains of prompts using various machine learning models and connections. The tool also supports data extraction and merging in a secure environment without collecting user data (verified: 2026-01-29).

Does the software require a paid subscription to access its core prompt engineering features?

No, the software is not strictly paid. All main functions are available for free for personal use. However, advanced features such as team collaboration, device synchronization, and API deployment are gated behind Team and Enterprise pricing tiers (verified: 2026-01-29).

How can users integrate their own custom data connectors into the Prompt Mixer environment?

Users have the ability to add their own connectors to the platform. This is achieved by writing a custom connector and installing it directly via a link from GitHub, with technical guidance provided in the official documentation (verified: 2026-01-29).