# AI rank trackers, and what they actually measure

> What an AI rank tracker measures, why AI answers have no fixed rank, and 9 AI rank tracking tools compared on price, prompts, engines and cost per 100 prompts.

Source: https://terradium.io/ai-rank-tracker

Last updated 10 October 2026 · Prices checked 10 October 2026

**The short answer**

An AI rank tracker asks ChatGPT, Perplexity, Gemini and Google AI Overviews your buyers' questions on a schedule and records whether you're mentioned and cited. AI answers change from run to run, so the useful number is **how often** you appear across many samples, not a single position.

For daily tracking at a low price, start with **Otterly.AI** ($29, 15 prompts) or **Peec AI** ($95, 50 prompts). If you already use Semrush or Ahrefs, try their add-ons. **Terradium** ($29) tracks weekly and writes the content that moves the numbers.

## What an AI rank tracker measures

- **Mentions:** whether your brand is named in the answer.
- **Citations:** whether your site is linked as a source. This is what sends traffic.
- **Position in the answer:** where you're named relative to competitors.
- **Share of voice:** your mentions as a share of all brand mentions across the question set.
- **Sources:** which sites the engines cite instead of you, which shows where to get covered.

## Why there's no fixed rank in AI search

A search results page lists the same links in the same order for hours or days. An AI answer is generated each time, so the same question can name different brands on two runs a minute apart. That's why trackers run each question repeatedly and across several engines, and report trends. When you compare tools, compare **answers sampled per month** (prompts × runs × engines), not just prompt counts.

## AI rank trackers compared

Every price links to the vendor's own pricing page and was checked on the date above.

| Tool | Entry plan | Prompts | Runs | Engines | Free trial |
| --- | --- | --- | --- | --- | --- |
| Terradium | [$29/mo (Starter)](https://terradium.io/pricing) | 15 | weekly | 3 of 4: ChatGPT, Perplexity, Google AI Overviews, Gemini | 7 days |
| Otterly.AI | [$29/mo (Lite)](https://otterly.ai/pricing) | 15 | daily | 4 of 7: ChatGPT, Google AI Overviews, Perplexity, Microsoft Copilot, Google AI Mode, Gemini, Claude | Yes |
| Peec AI | [$95/mo (Starter)](https://peec.ai/pricing) | 50 | daily | 3 of 6: ChatGPT, Google AI Overviews, Google AI Mode, Gemini, Microsoft Copilot, Naver AI | Yes (length not stated) |
| Semrush | [$99/mo (AI Visibility Toolkit)](https://www.semrush.com/kb/1493-ai-toolkit) | 25 | daily | 2 of 2: ChatGPT, Google AI Mode | None |
| Rankscale | [$99/mo (Pro)](https://rankscale.ai/pricing) | Not published | Not published | 9: ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, Claude, Microsoft Copilot, DeepSeek, Mistral | 7 days (Pro) |
| Ahrefs Brand Radar | [$199/mo (Brand Radar AI)](https://ahrefs.com/pricing) | Not published | daily | 7: Google AI Overviews, Google AI Mode, Perplexity, Microsoft Copilot, Gemini, ChatGPT, Claude | None |
| Scrunch | [$250/mo (Core)](https://scrunch.com/pricing/) | 125 | Not published | 4 of 4: ChatGPT, Perplexity, Google AI Overviews, Microsoft Copilot | 7 days |
| AthenaHQ | [$295/mo (Starter)](https://www.athenahq.ai/pricing) | Not published | Not published | 11: ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, Claude, Microsoft Copilot, Grok, DeepSeek, Meta AI, Mistral | Free plan (300 credits) |
| Profound | [Contact sales (Enterprise)](https://www.tryprofound.com/pricing) | Not published | daily | 9: ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, Microsoft Copilot, Claude, DeepSeek, Exa Search | 7 days (50 prompts, daily) |

## Cost per 100 prompts

| Tool (entry plan) | Price per month | Per 100 prompts | Answers sampled per month | Per 100 answers |
| --- | --- | --- | --- | --- |
| Terradium (Starter) | $29 | $193 | 196 | $14.81 |
| Otterly.AI (Lite) | $29 | $193 | 1,824 | $1.59 |
| Peec AI (Starter) | $95 | $190 | 4,500 | $2.11 |
| Semrush (AI Visibility Toolkit) | $99 | $396 | 1,520 | $6.51 |
| Rankscale (Pro) | $99 | Not published | 4,800 | $2.06 |
| Ahrefs Brand Radar (Brand Radar AI) | $199 | Not published | Not published | Not published |
| Scrunch (Core) | $250 | $200 | 5,000 | $5.00 |
| AthenaHQ (Starter) | $295 | Not published | 3,600 | $8.19 |
| Profound (Enterprise) | Not published | Not published | Not published | Not published |

Per 100 prompts = monthly price ÷ prompts × 100. Answers sampled = prompts × runs per month (daily 30.4, weekly 4.35) × engines included. Per 100 answers = monthly price ÷ answers × 100.

## Which tracker fits you

### Pick Otterly.AI if…

You want daily tracking on 4 engines for the lowest price.

### Pick Peec AI if…

You want daily tracking on more prompts, with source analytics and unlimited seats.

### Pick Rankscale if…

You want to set each prompt's cadence yourself, from hourly to monthly.

### Pick Ahrefs Brand Radar if…

You want market-wide research across a large prompt index, not just your own list.

### Pick Semrush if…

You want AI tracking inside the SEO suite you already use.

### Pick Profound if…

You're an enterprise that wants the widest coverage and a custom contract.

### Pick Terradium if…

You want the tracker to tell you what to write and then write it: 15 questions sampled weekly, a list of gaps, and 30 articles a month.

## Before you start tracking

Check that AI crawlers can read your site at all. If robots.txt blocks them or your pages are client-rendered, no tracker will show you being cited. The free [AI crawler checker](https://terradium.io/tools/ai-crawler-checker) tests both in a few seconds.

## Questions

**What is an AI rank tracker?**

An AI rank tracker asks AI assistants and AI search features, such as ChatGPT, Perplexity, Gemini and Google AI Overviews, a fixed set of questions on a schedule. It records whether your brand is mentioned, where it appears in the answer, and whether your site is cited as a source.

**Is there such a thing as a rank in ChatGPT?**

Not a fixed one. The same question can get a different answer each time it's asked, so a single position means little. Good trackers sample each question repeatedly and report how often you appear and are cited over time.

**How is AI rank tracking different from SEO rank tracking?**

An SEO rank tracker records a page's position in a list of links that changes slowly. An AI rank tracker records whether a brand is named or cited inside a generated answer that changes from run to run, so it reports frequencies and trends rather than positions.

**Which AI rank tracker is cheapest?**

Terradium Starter and Otterly.AI Lite both start at $29 a month for 15 tracked questions. Otterly runs them daily on 4 engines. Terradium runs them weekly on 3 engines and writes 30 articles a month.