MIT self-host
Free
Ongoing software; BYOK and hosting separate
- Included scope
- CLI; prompt generation; mention metrics; scheduled monitoring
Lettertrace
● Identity checkedOpen-source AI brand mention monitoring · Official-source review 2026-10-09
Lettertrace generates prompts for a topic, queries supported answer engines and tracks brand mentions, sentiment, positions and competitor share of voice. Its CLI and self-hosted workspace support scheduled runs and trend inspection.
- Category
- Open-source AI brand mention monitoring
- Free access
- MIT-licensed software is free to self-host with BYOK; provider query charges and Supabase/infrastructure costs remain separate.
- API access
- CLI and BYOK Anthropic, OpenAI and Google access are listed; AI Overviews monitoring is advertised, with exact connector requirements unverified.
Is Lettertrace right for you?
A good fit for
Relevant to developers measuring their brand across a fixed repeatable prompt set.
Before you choose
No paid Lettertrace software tariff is disclosed. Each configured model call can consume provider spend despite end-to-end-free marketing. The page says keys never leave infrastructure while model requests use providers; confirm key custody and request destination in source. Topic/prompt caps, schedule enforcement, sentiment method and engine eligibility need confirmation. Dashboard trends and sample Acme results are illustrations, not observed performance. Changes in prompts, models and answer sampling affect comparisons, and visibility does not guarantee search ranking or revenue. No monitoring run or self-host install was performed.
Workflow and handoff
Use a fixed public prompt set, retain exact answers and provider costs and compare repeated runs before interpreting a trend as a business outcome.
Pricing and practical limits
No paid Lettertrace software tariff is disclosed. Each configured model call can consume provider spend despite end-to-end-free marketing. The page says keys never leave infrastructure while model requests use providers; confirm key custody and request destination in source. Topic/prompt caps, schedule enforcement, sentiment method and engine eligibility need confirmation. Dashboard trends and sample Acme results are illustrations, not observed performance. Changes in prompts, models and answer sampling affect comparisons, and visibility does not guarantee search ranking or revenue. No monitoring run or self-host install was performed.
Review method
Official product evidence reviewed on 2026-10-09; product artwork inspected visually. No hands-on vendor application test was performed. Application performance, security claims and plan enforcement were not independently tested.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Product workflow | Lettertrace generates prompts for a topic, queries supported answer engines and tracks brand mentions, sentiment, positions and competitor share of voice. Its CLI and self-hosted workspace support scheduled runs and trend inspection. | Facts sourced | 2026-10-09 |
| Pricing and restrictions | No paid Lettertrace software tariff is disclosed. Each configured model call can consume provider spend despite end-to-end-free marketing. The page says keys never leave infrastructure while model requests use providers; confirm key custody and request destination in source. Topic/prompt caps, schedule enforcement, sentiment method and engine eligibility need confirmation. Dashboard trends and sample Acme results are illustrations, not observed performance. Changes in prompts, models and answer sampling affect comparisons, and visibility does not guarantee search ranking or revenue. No monitoring run or self-host install was performed. | Facts sourced | 2026-10-09 |
Understand the total cost
Lettertrace pricing & plans
Alternatives to Lettertrace
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TruIntelTruIntel tracks sampled brand mentions and citations across AI answer platforms alongside SEO analysis. It combines prompt monitoring, competitor comparisons, reports and credit-based content optimization and CMS publishing.
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AI Search ConsoleAI Search Console tracks prompts, brand mentions, cited sources and competitor presence in AI answers. It keeps answer history and produces PDF reporting on visibility trends, prompt coverage and source gaps.
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VisibyVisiby tracks brand mentions and citations across AI search engines and produces site audits and action briefs. Higher plans add daily refreshes, competitor analysis, sentiment and agency reporting.
Explore toolThe practical questions
Frequently asked questions
Was the application hands-on tested?
No. This listing is based on dated official-source evidence and a visual artwork check. Unconfirmed costs and restrictions are identified explicitly.
What is Lettertrace used for?
Lettertrace generates prompts for a topic, queries supported answer engines and tracks brand mentions, sentiment, positions and competitor share of voice. Its CLI and self-hosted workspace support scheduled runs and trend inspection.
Does Lettertrace have a free plan?
MIT-licensed software is free to self-host with BYOK; provider query charges and Supabase/infrastructure costs remain separate.. This record lists ongoing free access; check the plan limits before starting.
How much does Lettertrace cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Lettertrace through an API?
CLI and BYOK Anthropic, OpenAI and Google access are listed; AI Overviews monitoring is advertised, with exact connector requirements unverified.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
No paid Lettertrace software tariff is disclosed. Each configured model call can consume provider spend despite end-to-end-free marketing. The page says keys never leave infrastructure while model requests use providers; confirm key custody and request destination in source. Topic/prompt caps, schedule enforcement, sentiment method and engine eligibility need confirmation. Dashboard trends and sample Acme results are illustrations, not observed performance. Changes in prompts, models and answer sampling affect comparisons, and visibility does not guarantee search ranking or revenue. No monitoring run or self-host install was performed.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Official product information
Current official product source read individually; product artwork inspected visually.
Read original source ↗Pricing review
Official product page reviewed for disclosed costs; unverified prices and allowances are identified in the listing.
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.