Bought in Oct 7, monetized in Oct 17: a Brazilian YouTube teacher's extension for his students

Dotti Finder is a Portuguese Chrome extension. On YouTube pages it tags each video with "several times higher than this channel's usual" and "views per hour," then sends people to a R$97–197/month web version, where it lists faceless channels that are blowing up every day. It launched in August, had 6 users by November 1,000, and has a 5.0 rating. Nothing in it is something others don't have. It grew because its creator is a knowledge-product influencer in Brazil who teaches people to make money from faceless YouTube channels. The extension is one of the tools in his course, and the users are his existing followers and students.

A student who made money in 10 days

Scroll down the dottifinder.com homepage and you'll find a video and a YouTube Studio screenshot. The channel in the screenshot had only 7 views in October 149, then climbed steadily, reaching 28k in 206 days. The owner is Caio Henrique, and his words are:

I used other niche-finding tools before and they were too hard to use. Dotti Finder beats them all. My favorite part is the algorithm: you save one channel and it pulls in similar channels on its own. I bought it in Oct 7 and made money by Oct 17, after 10 days of use.

The homepage has a dozen or so testimonials like this. One says "28 days, R$17,904", another says "monetized 3 channels in 9 weeks", another "5 channels in Portuguese, Spanish and Polish." Every testimonial is dated the same: October 2026.

This date matches the user numbers. A third-party extension stats site shows Dotti Finder had 29 users in September 38, 8 in October 527, passed 18 by 1,000 later in October, briefly hit two to three thousand, then fell back (I could not independently verify this curve). From early November 1 to 6, the Chrome Web Store kept showing "1,000 users," and the review count went from 15 to 16. So the paid version was likely offered to students starting in early October, and the extension jumped from a few dozen users to over a thousand in those two weeks, then leveled off.

What it is

In Brazil, "canal dark" (dark channel) is an established business: no face on camera, AI for scripts, voiceovers and editing, YouTube channels in English, Spanish or other languages, earning ad revenue in dollars. The hardest step is topic selection: which topic is taking off, and who hasn't covered it yet. Dotti Finder handles exactly that step.

• Free extension (the website says 19 features are free): on YouTube it shows outlier multiples and views per hour next to each video. On channel pages it shows whether ads are enabled and for how long, and where the niche sits in its lifecycle. It also lets you grab full-size thumbnails with one click, read full transcripts, hide Shorts, and automatically insert ad breaks in YouTube Studio.
• Paid version (payments via Kiwify, 7-day refund): Lite R$97/month, Pro R$197/month or R$1,497 per year (about $37 a month). The valuable part is the web-based Niche Finder: it scans for newly appearing faceless channels every day, sorts them by average views per video, tags them "rare / epic / legendary," and publishes a daily TOP 10 list of "whose videos to copy right now." There's also "Parecidos com os Meus" (save your channel and it finds similar ones on its own) and "Método Malandro": click once on a viral video and it checks 9 languages to see which one hasn't covered the topic yet.

The homepage headline is blunt: "Find faceless channels worth copying." The homepage says it has analyzed 212,765 channels and read 2.13M videos, with 1,587 new channels added this week (11-06 reads). The numbers differ across the site at different times and in different places.

Who is behind it

Brothers Giovanni Dotti and Victor Dotti have been teaching dark channels on YouTube since 2021. Giovanni's main channel has 24.8K subscribers and his Instagram has about 20K followers. He has publicly shown the YouTube Studio dashboards of 7 dark channels, earning R$167 over 266,919 days. What they sell is a full ladder:

Dotti Finder is the monthly-fee piece of this ladder. The course is a one-time payment; the tool charges every month. Annual Pro includes 6 classes and a recording of an in-person event, "Mansão Dotti" (the website lists the live ticket at R$10,000). Dotti Growth and one-on-one students get one extra year of "VIP area", where the teacher personally picks niches. The terms in the tool (garimpar "mining", nicho/subnicho, Método Malandro) are exactly what the course teaches.

Reclame Aqui (Brazil's complaint platform) has complaints from students about the entry course.

Where users come from

Everything comes from the Dotti brothers' own traffic. I didn't see anything else.

• Video description box. On Nov 2, Giovanni posted "37 minutes to learn dark channels and monetize with AI: one channel, R$92,000 a month". It got 3K views in 19 days. The first line of the description is the R$37 entry course, the second line is "►DottiFinder, see what's hot right now, start free", followed by Dotti Studios, Dotti Growth, the one-on-one application form, and the community. The Nov 4 student interview "He made R$800,000 from dark channels" carries the same set of links.
• Dedicated tutorial channel. The brothers opened a new channel, "Irmãos Dotti", with only 349 subscribers. On Nov 3 it posted "Dark channels with Claude (fully automated)". It covers finding niches with Dotti Finder, writing titles and scripts with Claude, then making the video with Dotti Studios. It got 6,388 views. The plugin also hooks into MCP, so you can query its data directly from Claude or GPT. This video is selling that feature.
• Student group. The testimonial screenshots on the website come from group chats in the community. All 16 reviews in the store are 5 stars, and the website uses "5.0 on the Chrome Store" as a selling point. Almost everyone who installs the plugin is a fan or a student, so the reviews are naturally high.

I found no record of it running Meta ads, no coverage in English or Chinese media, and no mentions on X in 90 days. The Chrome Store name and description are Portuguese only, so few people probably find it through store search.

Who it's competing with

In English markets, "find hit videos, find niches" is already a red ocean:

The clearest example is DarkLAB: it launched half a year before Dotti Finder, is also in Portuguese, also flags outliers and views per hour, and also finds similar channels, yet the plugin has only 488 users. The difference isn't features. It's whether there is a teacher with over twenty thousand subscribers and paying students behind it.

In November, a batch of new English competitors appeared in the Chrome Store (Y+ YouTube Outlier Finder Pro, TubeMetrix, YTBRAIN, VidPulse AI), each with 0 to 2 users.

Why it took off

1. The users are ready-made, and they have paid. Students paid R$37 to R$40,000 to learn niche finding. The tool automates the most time-consuming step in the course, so anyone following the method ends up installing it.
2. The course and the tool recruit each other. The course brings people in to buy the tool. Annual tool buyers get the course and event recordings, which in turn bring people to the course. A one-time course revenue becomes a monthly fee.
3. Localization. Fully in Portuguese, with prices and 12-installment plans that Brazilians are used to, and payment through Kiwify. The barrier is lower than for English tools priced in dollars.
4. A good button. Método Malandro targets the most profitable dark-channel play: moving English hits into Spanish and Polish. It's one of the few things it does as a one-click feature that others haven't, but it isn't hard to copy.

If it were you

The verdict: Don't build yet another standalone outlier plugin. English already has vidIQ, Nexlev, and TubeLab, and Brazil has DarkLAB with its 488 users as a counterexample. Dotti Finder relies on the teacher's students, which you can't get. What's worth learning is the structure of "educator + monthly-fee tool", provided you can find a teacher who already has students.

Who it suits: Developers who can write plugins and scrapers, who also know a teacher in some language who teaches faceless YouTube, repost channels, or TikTok selling, and who is willing to build tools for them on a revenue-share or partnership basis. Or you already teach this kind of course in some language and have paying students.

Who it doesn't suit: People with no creator community who hope to get traffic through Chrome Store search, people who want to go head-on into the English market, and people who can't stand user numbers rising and falling with a teacher's traffic.

How to build it: First pick the language and community. Among Spanish, Indonesian, Vietnamese, Turkish, and Arabic, find teachers who are selling "earn money from faceless channels" courses and who have tens of thousands of subscribers and a paid community. (Inference: teachers like this probably exist in most major languages, but I haven't checked them one by one.) Follow Dotti's structure for the tool: the free plugin stays on YouTube pages and flags outliers and views per hour. Charge for the web-side "daily new viral channel library" and "which language nobody has covered yet". Use the same categories and terms as the teacher's course so students feel the tool is part of the course. Price and offer installments by local custom, with the monthly fee at 2–5 times the course's entry price.

How to get users: Not through your own efforts. The teacher links the tool in the description of every video, and makes a tutorial like "build a channel from scratch with AI + this tool". Older course students get a few months free, and higher-priced students get it permanently. Use students' Studio screenshots as testimonials. What you want is your share of the revenue split, not the traffic.

When to get in before it's too late: No specific date. But once YouTube cracks down on mass-produced AI channels and sharply cuts ad revenue share for this kind of channel, the whole education sector and these tools will shrink together, and by then it will be too late.

What would show you got it wrong: ① If Dotti Finder is still stuck around a thousand users by next year's first quarter, even teachers with ready-made students have a low ceiling for the tool. ② If fewer than 5% of the free-plugin users in your chosen teacher's student base convert to paid. ③ If YouTube tightens its monetization policies on "repetitive, mass-generated content" further, and stories like "monetized in 10 days" in student testimonials become rarer.