Proofsource vs Otterly.AI
Pick Otterly.AI if you want the lowest published self-serve entry price among the tools AI answers name most, with daily tracking on ChatGPT, Google AI Overviews, Perplexity and Microsoft Copilot. Pick Proofsource if Claude has to be in the measurement from day one, if you want a 95% interval on every figure, and if each gap should come with the cited pages and a draft fix. Otterly.AI charges extra for Claude, Gemini and Google AI Mode on every plan.
Proofsource and Otterly.AI in four facts
Price to start
- Proofsource
- Free trial, then plans from $9 a month (5 questions on ChatGPT, weekly)
- Otterly.AI
- $29/mo Lite; Standard $189/mo; Premium $489/mo; Enterprise custom[1]
Free trial
- Proofsource
- 2 days free, 4 engines, no card
- Otterly.AI
- 7 days, 50 prompts, no credit card[2]
Engines covered
- Proofsource
- 4 on the trial, up to 4 on a paid plan
- Otterly.AI
- ChatGPT, Google AI Overviews, Perplexity and Microsoft Copilot on every plan; Claude, Google AI Mode and Gemini are paid add-ons[1]
Re-read cadence
- Proofsource
- Daily, weekly or monthly, you choose
- Otterly.AI
- Daily, at no fixed hour, on a cadence Profound sets[3]
Otterly.AI or Proofsource: which should you pick?
Otterly.AI is self-serve AI search monitoring for ChatGPT, Google AI Overviews, Perplexity and Microsoft Copilot, with GEO audits and recommendations. 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.
Choose Otterly.AI if
- You want to buy a small plan online today, with no call, and grow it by prompt count.
- You want Microsoft Copilot tracked on the entry plan.
- You want API, MCP access and a Looker Studio connector on a published self-serve plan (from its Standard plan).
Choose Proofsource if
- You want Claude in the default panel, priced per question like every other engine.
- You want to know whether a week's change is real before reporting it: every percentage carries a 95% Wilson interval and alerts wait until a change clears it.
- You want each lost question tied to the pages the engines cited instead, with a draft fix held for approval.
Proofsource and Otterly.AI on the 9 questions buyers ask
Every Otterly.AI cell was read from Otterly.AI's own pages on Oct 5, 2026 and is footnoted to the page it came from. Prices are theirs, as shown to us; they change, so check the source before you buy.
| Question | Proofsource | Otterly.AI |
|---|---|---|
| Price to start | Free trial; then from $9 a month (5 questions on ChatGPT, weekly) | $29/mo Lite; Standard $189/mo; Premium $489/mo; Enterprise custom[1] |
| Free trial | 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call | 7 days, 50 prompts, no credit card[2] |
| Questions tracked | 25 buyer questions in the trial; paid plans pick their questions per brand, each priced per engine. Questions above 50 per brand are 20% off. | 15 prompts on Lite, 100 on Standard, 400 on Premium; Enterprise from 1,000[1] |
| Engines covered | ChatGPT, Perplexity, Claude and Google AI Overviews on the trial; paid plans pick from those 4, each priced per question, and Google AI Mode, Gemini, Microsoft Copilot, Grok, DeepSeek and Meta AI are enabled on a call |   Google AI Overviews   Google AI Mode ChatGPT, Google AI Overviews, Perplexity and Microsoft Copilot on every plan; Claude, Google AI Mode and Gemini are paid add-ons[1] |
| Re-read cadence | Daily or weekly, chosen per plan; answer sets move 9-27% day over day in our sampling, so daily catches the most; the trial runs 2 scans a day apart[5] | Daily, at no fixed hour, on a cadence Profound sets[3] |
| How you buy | Self-serve: the trial gives answers the day you sign up, and checkout takes up to 1000 brands; above that, or for Managed where our team does the work, book a demo | Self-serve sign-up for Lite, Standard and Premium; Enterprise through sales[1] |
| Statistical confidence | 95% Wilson interval on every percentage; alerts wait until a change clears it[4] | Not published on its pricing page[1] |
| Root cause and fix | Each gap names the pages the engines cited instead, with a draft fix held for your approval | Recommendations (3 a week on Lite, unlimited above) and GEO audits[1] |
| Getting your data out | Full history as CSV or JSON, any date range; a REST API with API keys; switched on per customer, our team delivers it into Looker Studio or your BI tool | Reports and export on every plan; API, MCP and a Looker Studio connector from Standard[1] |
How do Proofsource and Otterly.AI differ in their core use cases?
Otterly.AI is a self-serve monitor you buy by prompt count; Proofsource is a measurement and fix tool you start free and buy per brand. Otterly.AI tracks four engines daily on every plan and adds GEO audits and recommendations. Proofsource asks four engines by default (including Claude) on the cadence you pick, daily or weekly, puts a 95% interval on every number, and turns each lost question into the cited pages behind it and a draft fix.
How do the pricing plans of Proofsource and Otterly.AI compare?
Otterly.AI publishes three self-serve tiers by prompt count; Proofsource publishes a free trial and one self-serve price card: each brand pays a fee by cadence plus each question on each engine, from $9 a month (5 questions on ChatGPT, weekly). Otterly.AI's Claude, Gemini and Google AI Mode cost extra on each tier. Proofsource's trial and every plan's default four are ChatGPT, Perplexity, Claude and Google AI Overviews, each priced per question; Google AI Mode, Gemini, Microsoft Copilot, Grok, DeepSeek and Meta AI are enabled on a call.
Is Otterly.AI better suited for agencies or enterprise teams?
Its pricing page leans to small teams and agencies: Lite is for solo marketers and small teams, and agency partners on Standard or Premium get more prompts, unlimited workspaces and branded Looker Studio reports. Enterprise starts from 1,000 prompts with SSO and custom terms.
Where Proofsource shines: 4 things it is built to do.
Each one is a mechanism: what runs, how often, and what would catch us out if it were not true.
The free trial is the real report.
The free trial asks 25 buyer questions on ChatGPT, Perplexity, Claude and Google AI Overviews, 2 scans a day apart, and hands back what a subscriber reads: which questions name you on which engine, who is named instead, and the pages each engine cited. No card, no call. One per company domain.
Every number arrives with the interval it was measured at.
Ask an engine the same question twice and you can get two answers, so one read is a draw, not a fact. We publish a 95% Wilson interval on every percentage and hold alerts until a change clears it. A tool that treats a single run as a finding will sell you progress on a day you did nothing.[4]
Four engines from the free trial, 4 on the price card.
ChatGPT, Perplexity, Claude and Google AI Overviews run side by side from the free trial upward, each priced per question on paid plans; Google AI Mode, Gemini, Microsoft Copilot, Grok, DeepSeek and Meta AI are enabled on a call. The questions are re-asked on their own on the cadence you pick: daily or weekly. The full history leaves as CSV or JSON over any date range, or through the REST API, so the record is yours.
Each gap names the page that beat you, then drafts the answer.
A gap carries the sources the engines cited instead of you. Then a draft built on what those pages have and yours does not, held for a human to approve, because nothing should publish itself in your name.
Already using Otterly.AI?
You do not have to choose on day one. Here is how teams run Proofsource beside Otterly.AI and decide on their own data.
Keep Otterly.AI running
Nothing about trying Proofsource needs you to stop Otterly.AI. Your history and reports there stay where they are.
Bring your questions across
Export or copy the prompts you track in Otterly.AI 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 Otterly.AI: what buyers ask
How long is the Otterly.AI free trial?
Otterly.AI's help center says 7 days with 50 prompts and no credit card.
Does Otterly.AI track Claude?
Yes, as a paid add-on on Lite, Standard and Premium. Gemini and Google AI Mode are add-ons as well.
Is there a free trial of Proofsource?
Yes. 200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free. No card, no sales call. One free trial per company domain, and the report is about your own domain.
Which AI engines does Proofsource track?
ChatGPT, Perplexity, Claude and Google AI Overviews on the trial; paid plans pick from ChatGPT, Perplexity, Google AI Overview and Claude, each priced per question.
How often does Proofsource re-read the answers?
On the cadence each plan picks: daily or weekly. Answer sets move 9-27% day over day in our own sampling, so daily catches the most. The free trial runs 2 scans a day apart.
Where do the Otterly.AI facts on this page come from?
From Otterly.AI's own public pages, linked in the Sources list with the date we read them. We have not run Otterly.AI on a domain of our own, so no measured number on this page is theirs. If a row is out of date, tell us and we will change it.
Where each fact on this page comes from.
- Otterly.AI pricing, read Oct 5, 2026. Otterly.AI's own page; no third-party roundup is used as a source.
- Otterly.AI help: free trial, read Oct 5, 2026. Otterly.AI's own page; no third-party roundup is used as a source.
- Otterly.AI help: monitoring interval, read Oct 5, 2026. Otterly.AI's own page; no third-party roundup is used as a source.
- Wilson score interval. The interval we put on every visibility percentage. Introduced by E. B. Wilson in 1927 and standard for binomial proportions, because it stays honest at small sample sizes and near 0% or 100% where the naive normal approximation breaks.
- Proofsource sampling: day-over-day change in which brands get named, same question one day apart. Perplexity 27%, ChatGPT 18%, Google AI Overviews 12%, Claude 9%. How we measure.
Found a Otterly.AI row that has changed? Tell us and we will correct it here.
More sourced comparisons
A free trial settles this faster than either of us can write about it.
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 is named instead, and the pages each engine cited.
Google AI OverviewsGoogle AI Mode
