Elmo vs PromptSignal
Elmo is an open-source, self-hostable alternative to PromptSignal, an AI visibility tracking tool. Both measure how AI answer engines describe your brand, but Elmo ships every line of code, runs on your own infrastructure, and is free to self-host — so your data stays yours and each metric is independently verifiable.
Limited market presence
PromptSignal appears to be a very early-stage product with limited adoption. Information on this page may be incomplete, and the tool's availability or feature set could change.
Elmo
Open-source AEO platform. Self-host for free, forever. Track AI visibility across ChatGPT, Claude, and Google AI Overviews with full transparency.
PromptSignal
Early-access brand monitoring with curated prompt suggestions
About PromptSignal
PromptSignal monitors how leading models mention, rank, and describe a brand so teams can measure visibility, track competitors, and adjust positioning. Prompts come from curated suggestions tailored to the business rather than requiring a list up front. The product is in early access — signups join a waitlist and the site offers a call with the founders.
Popularity grade: D
- Still early access — new signups join a waitlist
- Curated prompt suggestions rather than user-supplied lists
- Direct founder access offered as part of onboarding
Feature comparison
| Feature | Elmo | PromptSignal |
|---|---|---|
| Core Tracking | ||
| Multi-LLM Tracking | ||
| AI Visibility Score | ||
| Citation Analytics | ||
| Competitor Benchmarking | ||
| Brand Mention Tracking | ||
| Platform | ||
| White-Label / Agency | ||
| Open Source | ||
| Content Generation | ||
| Advanced Analytics | ||
| Prompt Volume Estimates | ||
| Sentiment Analysis | ||
| AI Crawler Analytics | ||
| Geographic Tracking | ||
| Social Media Tracking | ||
| Shopping Tracking | ||
| Multi-Language | ||
| Actionable Insights | ||
| Action Recommendations | ||
| Content Gap Analysis | ||
| AI Site Audits | ||
| AI Keyword Research | ||
| Reporting & Integration | ||
| Email Alerts | ||
| Data Export / API | ||
| BI Connectors | ||
Key differences
Only in Elmo
- Citation Analytics
- White-Label / Agency
- Open Source
- Data Export / API
Both offer
- Multi-LLM Tracking
- AI Visibility Score
- Competitor Benchmarking
- Brand Mention Tracking
Only in PromptSignal
- Sentiment Analysis
- AI Keyword Research
Why choose Elmo over PromptSignal?
Open source and transparent
Every line of code is open. You can verify exactly how your visibility data is collected, calculated, and presented. No black boxes.
Self-host for free, forever
Run Elmo on your own infrastructure. The core platform is free and always will be, even when we release a cloud version of Elmo.
No vendor lock-in
Export everything, fork the code, or migrate at any time. You own all of your data and have the right to use it wherever you want.
Built to last
Bootstrapped and sustainable. No investors pushing towards dark patterns. We'll outlast the companies taking too much VC money.
/ FAQ
Frequently Asked Questions
- What is the difference between Elmo and PromptSignal?
- Elmo is an open-source, self-hostable AI visibility platform, while PromptSignal is a closed-source AI visibility tracking tool. Both track how AI answer engines describe your brand, but Elmo gives you the full source code and runs on your own infrastructure, so you can verify every metric and keep your data in-house.
- Is Elmo a free, open-source alternative to PromptSignal?
- Yes. Elmo is a free, open-source alternative to PromptSignal. You can self-host the full platform at no cost, read every line of code, and track your AI visibility across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews without per-seat or per-prompt fees.
- Is PromptSignal open source?
- No, PromptSignal is a closed-source, hosted product, so you cannot inspect how its metrics are calculated. Elmo is fully open source — you can audit the code, self-host it on your own infrastructure, and avoid vendor lock-in.
- Can I self-host Elmo instead of PromptSignal?
- Yes. Elmo is designed to be self-hosted — deploy it on your own infrastructure in minutes with the CLI. You keep full ownership of your data and prompts, with no per-seat pricing and no third-party dashboard holding your visibility history.
Ready to track your AI visibility?
Deploy Elmo in minutes and start monitoring how ChatGPT, Claude, and Google AI Overviews talk about your brand.