Proofsource vs PromptEye
PromptEye splits its offer into Watch (monitoring) and Optimize (monitoring plus content tools), with extra engines sold as add-ons. Proofsource includes Claude and Google AI Overviews by default and drafts a fix for each gap.
Proofsource and PromptEye in five facts
Price
- Proofsource
- Free trial, then plans from $9 a month (5 questions on ChatGPT, weekly)
- PromptEye
- Watch €29, Optimize Lite €59, Optimize Standard €119 and Optimize Plus €229 a month, net; Enterprise from €699[1]
Free trial
- Proofsource
- 2 days free, 4 engines, no card
- PromptEye
- Not published
AI engines covered
- Proofsource
- 4 on the trial, up to 4 on a paid plan
- PromptEye
- 3 to 4 AI models as standard; Claude, Grok and Copilot are paid add-ons; all models on Enterprise[1]
How often answers are re-read
- Proofsource
- Daily, weekly or monthly, you choose
- PromptEye
- Every 2 days on Watch; daily on the Optimize plans[1]
Seats
- Proofsource
- Unlimited team members
- PromptEye
- Not published
What PromptEye is, and who it is for
Watch or Optimize. Watch is a monitoring plan with analysis and recommendations; the Optimize plans add audits, new articles, rewrites, FAQ and schema generation.[1]
A European team. PromptEye lists offices in Poland, Germany, the United Kingdom, Spain and Hong Kong, and prices in euros, net of VAT.[1]
Agencies and industry data. An agency plan covers multiple clients from one account, and an Industry Reports module ranks companies in a sector by AI visibility, starting with tourism.[1]
Proofsource is an AI intelligence platform that shows which buyer questions name your brand in ChatGPT, Perplexity, Claude and Google AI Overviews, who gets named instead, and exactly what to fix.
Proofsource and PromptEye, fact by fact
Each PromptEye cell links to the page it came from. Where PromptEye does not publish a detail, the cell says so instead of guessing.
| Question | Proofsource | PromptEye |
|---|---|---|
| Price | Free trial, then one price card at self-serve checkout: each brand pays daily ($28 a brand a month) or weekly ($7), plus each question on each engine, plans from $9 a month (5 questions on ChatGPT, weekly). No overage charges | Watch €29, Optimize Lite €59, Optimize Standard €119 and Optimize Plus €229 a month, net; Enterprise from €699[1] |
| Free trial | 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call | Not published |
| AI engines covered | ChatGPT, Perplexity, Claude and Google AI Overviews on the trial. Paid plans pick from those 4, each priced per question; Google AI Mode, Gemini, Microsoft Copilot, Grok, DeepSeek and Meta AI are enabled on a call |   Copilot3 to 4 AI models as standard; Claude, Grok and Copilot are paid add-ons; all models on Enterprise[1] |
| How often answers are re-read | Daily or weekly, chosen per plan; daily is one answer per question per engine per UTC day. The trial reads every engine on 2 consecutive days | Every 2 days on Watch; daily on the Optimize plans[1] |
| Seats | Unlimited team members on every plan. The agency workspace is free, with client workspaces, scoped members and Client Viewer seats set up on a call | Not published |
| How a number is measured | A 95% Wilson interval on every percentage; alerts wait until a change clears it | Not published |
| What it does about a gap | Each gap names the pages the engine cited instead, with a draft fix held for your approval | Website audits, new articles, article rewrites, improvement suggestions, FAQ and schema generation[1] |
Where each shines
Both tools are built well for different teams. Each point is a strength, read from that vendor's own pages.
Where PromptEye shines
- Content tools by the month. Optimize plans include a set number of articles, rewrites, audits and suggestions each month.[1]
- Industry benchmarks. The Industry Reports module ranks every company in a sector by AI visibility, alongside any number of competitors.[1]
- An agency plan. One account manages AI visibility across many clients with higher limits.[1]
Where Proofsource shines
- Claude in the default four. Proofsource reads ChatGPT, Perplexity, Claude and Google AI Overviews on the trial and by default on every paid plan. On PromptEye, Claude is a paid add-on below Enterprise.[1]
- A trial you can start today. 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call. PromptEye's pricing page does not describe a free trial.[1]
- Daily reads with an interval. Proofsource can re-read daily and prints a 95% Wilson interval beside every percentage.
Proofsource or PromptEye: the fair verdict
Pick PromptEye if you want euro pricing, monthly content quotas on top of monitoring, an agency account or sector benchmark reports.
Pick Proofsource if Claude and Google AI Overviews matter by default, and you want to try the full measurement free before buying.
Choose PromptEye if you want
- Content tools by the month
- Industry benchmarks
- An agency plan
Choose Proofsource if you want
- Claude in the default four
- A trial you can start today
- Daily reads with an interval
Already using PromptEye?
You do not have to choose on day one. Here is how teams run Proofsource beside PromptEye and decide on their own data.
Keep PromptEye running
Nothing about trying Proofsource needs you to stop PromptEye. Your history and reports there stay where they are.
Bring your questions across
Export or copy the prompts you track in PromptEye and add them as buyer questions in Proofsource, so both tools ask the same things.
Run both side by side
Read the two for the same days on your own domain. Where the numbers differ, Proofsource shows the answers and the pages each engine cited, so you can see why.
Keep what serves your team
Many teams keep one tool for reporting and another for fixes. Pick on your own evidence, not on a comparison page.
Proofsource or PromptEye: what buyers ask
What's the best way to benchmark my brand's share of AI citations against category leaders?
When we asked AI engines this, some answers named PromptEye, whose Industry Reports rank companies in a sector by AI visibility. Proofsource shows how often you are named next to your competitors across ChatGPT, Perplexity, Claude and Google AI Overviews, with a 95% Wilson interval on every percentage.
Which AI models does PromptEye include?
Plans include 3 to 4 models as standard; Claude, Grok and Copilot are paid add-ons, and Enterprise includes all models.
How often does PromptEye update its data?
Every two days on Watch and daily on the Optimize plans.
Where each fact about PromptEye comes from
- PromptEye pricing and FAQ, read Oct 5, 2026.
Vendors change their pages. If a PromptEye fact here no longer matches their site, tell us through the contact page and we will correct it.
Your own trial settles this faster than any comparison page.
200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, and the report is about your domain: which buyer questions name you, who gets named instead, and what to fix.
Google AI OverviewsGoogle AI Mode
