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Scheduled launch — Aug 13, 2026

Lettertrace is listed on AI Kaptan and will enter the daily launch competition on that day. Community upvotes open on launch day.

Lettertrace
GEO Tools
Free

Lettertrace

Track your AI visibility and Generative Engine Optimization metrics across ChatGPT, Claude, and Gemini for free using your own API keys. Developer-first, open-source, and CLI-ready.

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Rating
0
Reviews
0
Upvotes
about 2 hours ago
Listed
Open Source
Analytics
Marketing
GEO Tools
AI Metrics and Evaluation
Generative Engine Optimization
Developer Tools
CLI
Tool information
Provider
The Letter Company
Platforms
Web
CLI
Languages
English
API Available
Yes
Added to directory
about 2 hours ago
Last updated
about 2 hours ago
Rating
Not available
Pricing
Free

About Lettertrace

What the tool does and who it's for

Lettertrace is an open-source, developer-first tool for Generative Engine Optimization (GEO) and AI visibility tracking. It measures how frequently major AI engines like ChatGPT, Claude, and Gemini mention your company or product across relevant search queries. Designed around a Bring Your Own Key (BYOK) model under an MIT license, Lettertrace eliminates SaaS markups by allowing users to pay AI model providers directly. It features a CLI interface for automated prompt generation, topic tracking, share of voice measurement, prominence calculation, and sentiment analysis, while also providing a web interface for non-technical users.

Key capabilities

Tracks company visibility and mentions across Claude, ChatGPT, and Gemini
Bring Your Own Key (BYOK) model with direct provider billing and zero markups
Completely open-source project released under the MIT License
Developer-first workflow featuring a dedicated npm command-line tool (`npm install lettertrace`)
Calculates brand share of voice, prominence, and sentiment across LLM responses
Generates realistic prompt variations tailored to target buyer intent and topics
Traditional web-based dashboard for non-technical users and team members

Pricing

Free — plans below

Free / Open Source

Most popular

$0

  • Full open-source access (MIT License)
  • Bring your own API keys for Claude, ChatGPT, Gemini, and other LLMs
  • Pay model providers directly with zero platform markup
  • Track visibility, share of voice, prominence, and sentiment
  • Access via npm CLI or web sign-up

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