Lettertrace

What is Lettertrace?

Lettertrace is a free, open-source tool that measures how often Claude, ChatGPT, Gemini, and Google AI Overviews mention your company. Add the topics buyers ask about, and it writes dozens of natural prompts, then checks every answer for mentions, position, and sentiment using your own API keys from each provider.

Top Features:

• Multi-model tracking: monitor Claude, ChatGPT, Gemini, and AI Overviews side by side.
• Prompt variations: turn one topic into dozens of realistic buyer questions automatically.
• Share tracking: see how often you win the answer versus each tracked rival.

Use Cases:

• AEO reporting: show leadership a weekly trend of brand visibility in AI answers.
• Benchmarking: find which rival brands AI assistants recommend for your key topics.
• Content testing: check whether a new comparison page lifts mentions in later runs.

Who Can Use Lettertrace?

• Marketing teams: measure brand presence in AI assistants without paying for another subscription.
• SEO specialists: extend search reporting into generative engines and answer engine optimization.
• Developers: self-host the MIT-licensed code and extend it with new engines.

Pricing

• Hosted app (free): sign up at no cost and run monitors using your keys.
• Self-hosted (free): clone the MIT repo, connect your own Supabase, and run it anywhere.
• API usage (provider rates): you pay Anthropic, OpenAI, and Google directly, with no markup.

Pros and Cons

Pros:

• Truly free: no subscription, seat fees, or markup on top of model costs.
• Data ownership: results live in your own Supabase, and keys are encrypted at rest.
• Open source: the MIT license lets teams fork, audit, and extend the code.

Cons:

• Key setup: you must set up and pay for several model provider accounts.
• Developer-first setup: self-hosting requires some comfort with npm, environment files, and Supabase.
• New project: it launched recently, so integrations and documentation are still growing.

FAQs:

1) Is it really free?

Yes, the software is free, and you only pay providers for API usage.

2) Which assistants does it monitor?

Claude, ChatGPT, Gemini, and Google AI Overviews, and more engines can be added.

3) Where is my data stored?

When self-hosted, results stay in your own Supabase project, avoiding any vendor lock-in.

4) Can it run automatically?

Yes, monitors run daily or weekly on a schedule to build trends.

5) Does it track competitors?

Yes, it shows share of voice and recommendations against each tracked competitor.