Lettertrace

Track your AI visibility for free (using your own API keys!)

AnalyticsMarketingGitHubOpen Source

▲ 352 votes57 commentsLaunched Aug 12, 2026

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Lettertrace measures how often Claude, ChatGPT, and Gemini mention your company. But there's a catch: it's free, developer-first, bring-your-own-key, and open source.

AI Analysis

📝 Summary

Lettertrace is a free, open-source, developer-first tool that tracks how often AI models like Claude, ChatGPT, and Gemini mention a specific company or brand. Users bring their own API keys to query the models and measure visibility without any cost. It solves the key pain point of limited insight into how generative AI represents brands in responses, which is increasingly important as users rely on LLMs for information. The value proposition centers on accessible, transparent analytics for AI-era brand monitoring via GitHub, emphasizing ease for technical users without vendor lock-in or fees.

📈 Market Timing

In 2025-2026, with explosive LLM adoption, maturing AI APIs, and rising concerns over brand perception in AI outputs, timing is ideal. User demand for AI-specific analytics is surging amid economic focus on efficient, low-cost tools and supportive tech policies. No major barriers evident. Excellent Timing.

✅ Feasibility

High. Low technical difficulty via existing AI APIs and user-provided keys, which minimizes operational and hosting costs. Open-source GitHub model enables community-driven development with low team overhead. Scalable distribution, few compliance risks for analytics, though API rate limits apply. Strong overall fit for indie/dev teams.

🎯 Target Market

Main segments: Tech developers, marketers, and founders at startups/SaaS companies (ages 25-45), concentrated in North America, Europe with high open-source engagement. Industries: Software, AI, digital marketing. Estimated TAM for AI analytics ~$20B+, SAM for brand monitoring ~$2B, SOM for LLM visibility niche ~$100M+. Pain points: Unknown AI brand representation. Moderate-to-high willingness to pay for premium enhancements beyond free core.

⚔️ Competition

Low. Direct competitors: 1. Brandwatch (brandwatch.com), 2. Mention (mention.com), 3. Meltwater (meltwater.com), 4. Brand24 (brand24.com). Advantages: Hyper-focused on AI LLMs (Claude/ChatGPT/Gemini), completely free with BYOK, fully open-source on GitHub for customization. Disadvantages: Requires technical setup and own API keys (rate limits/costs), narrower scope than comprehensive enterprise listening suites lacking social/web breadth.

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