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Lettertrace

Monitor how AI talks about your brand

free CLI Web AI Tools

Lettertrace is a ai tools tool built by The Letter Company. It's best for AEO teams and GEO teams. Pricing is free.

Pricing

free

Audience

AEO teams

Platforms

Community

0%

About Lettertrace

Lettertrace is an open-source, bring-your-own-key monitoring tool that tracks how brands are mentioned in AI assistant answers from models like Claude, ChatGPT, and Gemini.

Lettertrace provides free, developer-first, and open-source monitoring for brand visibility within AI assistant responses. It allows users to define specific topics relevant to their brand, such as "best CRM for startups" or "email tools for agencies." The platform then automatically generates variations of these topics into natural prompts, simulating real questions users ask AI assistants.

The tool measures how often a company is mentioned by AI models, providing metrics like brand visibility, share of voice, prominence, and sentiment. It also enables benchmarking against competitors, showing how often rival brands are recommended and their share of voice. All data is presented in a rich visibility report, allowing AEO/GEO teams to track trends over time.

Lettertrace is designed for self-hosting and offers a high degree of control. Users bring their own API keys for models like Anthropic, OpenAI, and Google, which are encrypted at rest and remain within their infrastructure. The platform is MIT licensed, allowing users to inspect, extend, and run it on their own infrastructure, with data stored in their own Supabase instance to prevent vendor lock-in.

Key Features

AI mention monitoring for Claude, ChatGPT, Gemini
Open-source and self-hostable
Bring-your-own-key (BYOK) for AI models
Topic tracking
Automatic prompt variation generation
Trend analysis over time (visibility, prominence, sentiment)
Competitor benchmarking and share of voice
Sentiment analysis of AI answers
Multi-model monitoring (Claude, ChatGPT, Gemini, Google AI Overviews)
Scheduled monitoring for automated data collection
Data stored in user's own Supabase

Pricing

free

Lettertrace is free end-to-end and open source. Users are responsible for their own AI model API key costs.

Who is it for?

Best for

  • Companies wanting to monitor their brand's presence and sentiment in AI assistant responses
  • Developers and teams who prefer open-source and self-hosted solutions
  • Organizations needing to benchmark their AI visibility against competitors
  • Teams requiring full control over their data and AI API keys

Not ideal for

  • Users looking for a fully managed, SaaS-only solution without self-hosting requirements
  • Individuals or small businesses without technical expertise to set up a CLI or Supabase
  • Those unwilling to manage their own AI API keys and associated costs

Integrations

Anthropic API OpenAI API Google AI API Supabase

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