Private AI Writing Tool for Mac

Privacy in AI-powered writing tools is not just a preference but a requirement for many professionals. Lawyers processing client documents, healthcare workers handling patient information, engineers working with proprietary code, and executives drafting sensitive communications all need assurance that their text stays private. Echoo provides multiple layers of privacy protection.

The strongest privacy guarantee comes from running local models through Ollama. When you use a local LLM, your text is processed entirely on your Mac. No data is transmitted over the network, no API calls are made, and no third party ever sees your content. This is true zero-knowledge privacy that satisfies even the strictest security requirements.

Echoo's architecture protects your privacy even when using cloud providers. Your text goes directly from your Mac to your chosen AI provider using their API. Echoo acts as a client, not a proxy. Your text never passes through Echoo's servers, is never logged, and is never stored anywhere other than in the API request to your chosen provider. API keys are stored in Apple Keychain, the most secure credential storage on macOS.

For organizations with specific compliance requirements, Echoo's open-source codebase means you can audit exactly how your data is handled. Security teams can review the source code, verify that no data is exfiltrated, and approve the tool for use with sensitive information. This transparency is impossible with closed-source AI tools.

Build a privacy-conscious workflow by assigning different providers to different commands based on sensitivity. Use local models for commands that process sensitive content like client documents, medical records, or proprietary code. Use cloud providers for non-sensitive tasks like polishing social media posts or improving personal emails. This hybrid approach gives you the best of both worlds: top-tier quality from cloud models when privacy is not critical, and complete privacy from local models when it matters.

Consider the privacy implications of different AI providers when you do use cloud services. Review each provider's data retention and training policies. Some providers offer enterprise agreements that guarantee your data will not be used for model training. Anthropic, OpenAI, and Google all have API data usage policies that differ from their consumer products.