The Sentinel watches.
Sentinel tracks how the four major AI engines recommend you and your rivals, on the questions your buyers actually ask. Self-serve, from free, with your category's history loaded from day one.
Proper measurement, not screenshots.
Anyone can paste a question into ChatGPT once. Sentinel asks hundreds of buyer-intent questions across four engines on a schedule, and measures the answers properly.
Buyer-intent prompts
On signup we generate the questions your buyers ask from your brand, site and category. Activate the ones that matter; add your own.
Four engines, scheduled
ChatGPT, Claude, Gemini and Google AI Overviews, re-asked daily or weekly so you see movement, not one-off snapshots.
Share of voice
Entity-level mention detection against the rivals you name, with sentiment and the exact context you appeared in.
Citation tracking
Which sources each engine leaned on when it answered. The map of where authority in your category actually lives.
What changed, in English
A plain-language feed: "Gemini started naming you on procurement questions" beats a wall of numbers.
Ranked next actions
Recommendations with steps, ordered by expected impact. Mark one done and Sentinel watches for the verified change.
Most tools start you at zero. Sentinel starts you last June.
Beneath Sentinel sits the Fortitude Vault: a longitudinal record of how AI engines have answered our canonical category questions, week after week, including for brands that have never spoken to us. When you sign up, your category's past is already on your chart.
Instant backfill
Up to twelve months of your category's history on day one. Your baseline conversation starts with "here is what has been happening", not "come back in a quarter".
Honest by design
The Vault records answers to our own question library, run by us. Your prompts, competitors and settings are never shared or sold. The model is Ahrefs, not surveillance.
Published in public
Quarterly category indexes and monthly movers reports are drafted from the Vault automatically and edited by humans. See the latest reports →
One chart your whole board understands.
A visibility score, share of voice against named rivals, and a trend line with annotations explaining every turn. The first AI metric you can put in a board pack without a glossary. Although there is a glossary.
The product tells you when you have outgrown it.
Sentinel suggests the buyer questions worth tracking. As your programme grows, you will hit your plan's caps on prompts, rivals and brands. That moment, not a salesperson, is the upgrade prompt.
From free, forever.
Start on the permanent free tier and upgrade when the caps tell you to. Full detail on the pricing page.
Free
- 1 brand, 5 prompts, 1 rival
- Monthly refresh
- Vault history included
Basic
- 25 prompts, 3 rivals
- Weekly refresh, 4 engines
- Alerts on movement
Standard
- 3 brands, 150 prompts, 10 rivals
- Daily refresh
- Content briefs, quarterly call
Pro
- 10 brands, 500 prompts, 25 rivals
- API and white-label
- Monthly strategy time
Comparing options? See how Sentinel stacks up against the alternatives.
Want the score moved for you, not just measured? That is Fortitude Forge, and every Forge plan includes Sentinel Pro.