Proofsource vs VisibilityIndex
VisibilityIndex sells a one-time, evidence-backed audit for local service businesses. Proofsource keeps reading the answers, daily on Custom, and names the page behind every gap.
Proofsource and VisibilityIndex in five facts
Price
- Proofsource
- Free trial, then Custom from $64 per brand per month (final price discussed on demo call)
- VisibilityIndex
- One-time: Standard $189 per report, Pro $249 per report[1]
Free trial
- Proofsource
- 2 days free, 4 engines, no card
- VisibilityIndex
- A free readiness scan of your website's structure; the full audit is paid[1]
AI engines covered
- Proofsource
- 4 on the trial, all 10 on Custom
- VisibilityIndex
- Standard: ChatGPT, Gemini and Perplexity. Pro adds Claude[1]
How often answers are re-read
- Proofsource
- Daily on Custom, or hourly
- VisibilityIndex
- One report per purchase[1]
Seats
- Proofsource
- Unlimited on Custom
- VisibilityIndex
- Not published
What VisibilityIndex is, and who it is for
Built for local service businesses. VisibilityIndex says it is for local service businesses and the agencies that serve them. Checkout asks for an industry (plumbing, HVAC, dentists, salons and dozens more), a city and the business website.[1]
One report per purchase. Each audit is a one-time purchase that returns a score, a channel breakdown, competitor benchmarks, an action roadmap, a PDF and a run artifact recording inputs, outputs and scoring.[1]
Official APIs with live search. All platforms are queried through their official APIs with live web search enabled, not by scraping the apps.[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 VisibilityIndex, fact by fact
Each VisibilityIndex cell links to the page it came from. Where VisibilityIndex does not publish a detail, the cell says so instead of guessing.
| Question | Proofsource | VisibilityIndex |
|---|---|---|
| Price | Free trial, then Custom from $64 per brand per month (final price discussed on demo call), arranged on a demo call | One-time: Standard $189 per report, Pro $249 per report[1] |
| Free trial | 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call | A free readiness scan of your website's structure; the full audit is paid[1] |
| AI engines covered | ChatGPT, Perplexity, Claude and Google AI Overviews on the trial. Custom covers all 10 engines, adding Google AI Mode, Gemini, Microsoft Copilot, Grok, DeepSeek and Meta AI, switched on at onboarding |     Standard: ChatGPT, Gemini and Perplexity. Pro adds Claude[1] |
| How often answers are re-read | Daily on Custom by default, one answer per question per engine per UTC day, or hourly or any frequency you choose; the trial reads every engine on 2 consecutive days | One report per purchase[1] |
| Seats | Unlimited seats on Custom, with client workspaces, scoped members, Client Viewer seats and SSO set up at onboarding | Not published |
| How a number is measured | A 95% Wilson interval on every percentage; alerts wait until a change clears it | 20 prompts on 3 platforms (60 queries) on Standard, 25 on 4 (100 queries) on Pro; evidence-gated scoring with a confidence rating[1] |
| What it does about a gap | Each gap names the pages the engine cited instead, with a draft fix held for your approval | A prioritised action roadmap and PASS/WARN/FAIL trust-signal checks with fixes[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 VisibilityIndex shines
- No subscription. You pay once for one report, which suits a business that wants a baseline before deciding on ongoing work.[1]
- Shaped for local search. Local audits take the business name, city and industry phrase, and the trust-signal checks cover contact, location and service-page coverage.[1]
- Gemini in the base audit. Standard covers Gemini alongside ChatGPT and Perplexity. Proofsource adds Gemini on Custom.[1]
Where Proofsource shines
- It keeps reading. Answer sets move day to day, so a single audit ages quickly. Proofsource re-reads every engine daily on Custom, so you see movement as it happens.
- Google AI Overviews and Claude by default. Proofsource reads ChatGPT, Perplexity, Claude and Google AI Overviews on every plan. VisibilityIndex does not list Google AI Overviews, and Claude comes with its Pro report.[1]
- Try the real measurement free. 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call. VisibilityIndex's free scan checks your site's structure; its AI measurement is paid.[1]
Proofsource or VisibilityIndex: the fair verdict
Pick VisibilityIndex if you run a local service business, or an agency serving them, and want one evidence-backed audit with a PDF, paid once.
Pick Proofsource if you need to see movement over time on ChatGPT, Perplexity, Claude and Google AI Overviews, with the page behind each gap and a draft fix.
Choose VisibilityIndex if you want
- No subscription
- Shaped for local search
- Gemini in the base audit
Choose Proofsource if you want
- It keeps reading
- Google AI Overviews and Claude by default
- Try the real measurement free
Already using VisibilityIndex?
You do not have to choose on day one. Here is how teams run Proofsource beside VisibilityIndex and decide on their own data.
Keep VisibilityIndex running
Nothing about trying Proofsource needs you to stop VisibilityIndex. Your history and reports there stay where they are.
Bring your questions across
Export or copy the prompts you track in VisibilityIndex 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 VisibilityIndex: what buyers ask
How can I check which buyer questions consistently get my company recommended by AI assistants versus competitors?
When we asked AI engines this, some answers named VisibilityIndex, which audits 20 or 25 prompts once per purchase. Consistency needs repeated reads: Proofsource re-reads your questions daily on Custom across ChatGPT, Perplexity, Claude and Google AI Overviews and puts a 95% Wilson interval on every percentage.
Is VisibilityIndex a subscription?
No. Each audit is a one-time purchase: $189 for Standard or $249 for Pro.
Which AI platforms does VisibilityIndex analyse?
ChatGPT, Gemini and Perplexity on Standard; Pro adds Claude.
Where each fact about VisibilityIndex comes from
- VisibilityIndex homepage, pricing and FAQ, read 5 Oct 2026.
Vendors change their pages. If a VisibilityIndex 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
