# ChatADV

Aiolum story: https://aiolum.com/story/chatadv/ · added 2026-11-06 · updated 2026-11-06

**In short.** ChatADV (AI agents for Brazilian lawyers: case analysis, case-law search and drafting, Brazil): R$2300 (about US$410) a month MRR, September 2024. Evidence grade D: reported, not verified. Team: A lawyer who built it alone, then 2 partners from the June 2023 launch; later headcount not published. Launched 26 June 2023; still running.

AI agents for Brazilian lawyers: case analysis, case-law search and drafting · Brazil · AI-native · team of 2 to 10 · still running · group: Legal and law firms

- Outcome: R$2300 (about US$410) a month MRR, September 2024 (evidence grade of the headline number: D; headline in US dollars: 4925)
- Launch: 26 June 2023; months from launch to the outcome: 15
- Team: A lawyer who built it alone, then 2 partners from the June 2023 launch; later headcount not published
- Outside funding: None found; about R$10,000 put into the relaunch, source does not say by whom
- Main factor: Distribution
- Meters, 1 to 4: evidence strength 1, copyable pattern 2, capital needed 1
- Tags: AI-native, Small team, Bootstrapped, Running, B2B, Legal

Links:

- Visit chatadv.com.br: https://chatadv.com.br/

**The product.** A web app for Brazilian lawyers. The lawyer describes a case or attaches the court file, and AI agents put the facts in order, search ChatADV's own case-law database, draft the court document in an editor with versions, and call reviewer agents before it is downloaded to Word. It also has more than 300 skills (prepared step-by-step instructions per legal task), connectors to Gmail, Google Drive and other apps, case-folder management and a short training course with a certificate. It began in 2023 as a ChatGPT-based legal assistant inside WhatsApp.

**Why it worked.** It was built by a practising lawyer who knew the problem, and it was launched on the Instagram account of a lawyer with a large audience who became his partner. In the founder's account to the Micro-SaaS case study, about 400 people started the free trial on launch day and 40 of them paid.

Evidence grades: A = disclosed by a public company, a filing or a payment processor, or verified by one; B = two or more independent reports agree, or a journalist confirmed it; C = a founder claim that no one else verified; D = reported, not verified: one founder claim or a third-party estimate with no second source; E = no revenue figure found, so the headline is a non-money fact and the other facts carry their own grades; calc = computed on this page from graded facts.

## Summary

ChatADV is an AI assistant for lawyers in Brazil. It started as a chatbot, a program that answers typed messages, that ran inside WhatsApp on top of the ChatGPT API, the paid interface through which other programs send text to OpenAI's models and get answers back. Today it is a browser app built around AI agents, model calls that plan a task, use tools such as a search in a case-law database, and check their own output, to analyse a case, find court decisions and draft a court document.

Paulo Sérgio Dantas, a criminal lawyer from Rio Grande do Norte who earlier worked in IT, first sold a legal bot called WhatsGPT that he built alone with no-code tools. Bernardo Azevedo, a lawyer who writes about law and technology on Instagram, became his partner; they renamed the product ChatADV and launched it on Azevedo's Instagram on 26 June 2023. A case study on Bruno Okamoto's site microsaas.com.br, dated 9 September 2024, reports from the founder about 230 paying subscribers and that "Seu MRR atual é de R$ 2.300,00" (translation: his current monthly recurring revenue is R$2,300).

That R$2,300 a month is one founder statement in one case study, so this story is grade D. A No-Code Start-Up list, dated 7 June 2024 and updated 15 August 2025, says ChatADV bills R$70,000 a month, without a date or a source for that number. In November 2026 the home page sold a Premium plan that it listed at R$277 a month, offered at R$97 in a year-end campaign.

## Pricing

ChatADV prices on the home page, read 6 November 2026 (grade C), converted at the Federal Reserve H.10 rate of 30 October 2026, 1 USD = 5.4252 BRL

| Plan | Per month, billed yearly (US$) | Per month, billed monthly (US$) | Limit |
|---|---|---|---|
| Premium, regular price |  | 51 | R$277 a month; agents, case-law search, calculations, skills, up to 5 connected apps, course |
| Premium, year-end campaign |  | 18 | R$97 a month, shown as 65% off R$277 |

The home page shows one plan, Premium, with a regular price of R$277 a month and a year-end campaign price of R$97 a month ("65% OFF"). The plan is chosen inside the app after sign-up; a yearly price was not shown. The page offers a free trial and a 7-day money-back guarantee. In 2023 the product cost R$19.90 a month or R$199.90 a year, according to the case study and the June 2023 home page.

## How much revenue does ChatADV make? The numbers, graded

A WhatsApp legal bot that became an agent-based drafting app for Brazilian lawyers; one founder figure of R$2,300 a month, not verified

| Fact | Value | Grade | Note | Sources |
|---|---|---|---|---|
| Monthly recurring revenue reported in the case study | R$2,300 (about US$410) | D | Founder's account in the microsaas.com.br case study by Bruno Okamoto, page dated 9 September 2024: "Seu MRR atual é de R$ 2.300,00" (translation: his current MRR is R$2,300). The text says the launch was on 26 June "deste ano" (this year), and the June 2023 home page shows the product already on sale, so the figure may be from 2023. No second source. | [1, 2] |
| Conversion to US dollars | about US$410 a month | calc | Calculated: R$2,300 divided by 5.6042 BRL per USD, the Federal Reserve H.10 rate of 9 September 2024. The headline outcomeUsd is that figure times 12, about US$4,925 a year. | [6] |
| Total revenue to the case-study date | about R$10,400 (about US$1,856) | D | Same case study: "Ja faturou aprox R$ 10.400,00" (translation: has already billed about R$10,400). Converted at 5.6042 BRL per USD. | [1, 6] |
| Paying subscribers in the case study | about 230, with more than 1,000 on trial | D | Same case study: "cerca de 230 usuários pagantes/assinantes, e com mais de 1.000 usuários testando". Monthly churn given as "0,8" with no unit. | [1] |
| Third-party revenue claim | R$70,000 a month | D | No-Code Start-Up list "15 exemplos de Micro SaaS IA que já estão faturando", dated 7 June 2024 and updated 15 August 2025: "ChatADV Inteligência artificial para advogados Faturando R$70 mil x mês". It gives no date and no source for the figure, and it is about 30 times the founder's case-study figure. Not used as the headline. | [5] |
| Launch | 26 June 2023, on Bernardo Azevedo's Instagram | D | Case study: more than 400 users took the 24-hour free trial on the first day and 40 subscribed, about 10%. A Wayback copy of chatadv.com.br from 30 June 2023 shows the product on sale. | [1, 4] |
| Predecessor product | WhatsGPT, a WhatsApp legal bot at R$14.90 a month with about 80 paying users | D | Case study. Built alone by Dantas with a R$50 WhatsApp automation licence and a R$300 logo. He also tried a doctor bot and a psychologist bot and switched them off because health questions were too serious. | [1] |
| Team | 2 partners at launch; later headcount not published | D | Case study: Dantas built WhatsGPT alone ("fazendo tudo sozinho"); Azevedo became his partner ("sócio") for ChatADV, and "alguns especialistas" (some specialists) worked on the infrastructure. The 2026 home page says the system was "construído pela nossa equipe" (built by our team) without a size. | [1, 3] |
| Money put into the relaunch | about R$10,000 | D | Case study: "O valor investido foi de aproximadamente R$ 10.000,00". It does not say who paid it. No outside funding round was found. | [1] |
| Price in 2023 | R$19.90 a month or R$199.90 a year | C | Case study, and the June 2023 home page: "por apenas R$ 19,90/mês". The case study also mentions a planned better version at R$39.90 a month. | [1, 4] |
| Price in November 2026 | Premium R$277 a month, offered at R$97 | C | Home page, year-end campaign. About US$51 and US$18 at 5.4252 BRL per USD (H.10, 30 October 2026). | [3, 6] |
| Model provider | OpenAI (2023); not named in 2026 | C | June 2023 home page: "utiliza a tecnologia do ChatGPT como base". Case study: "integrado com o OpenAi". The 2026 home page speaks only of "o modelo de inteligência artificial". | [1, 3, 4] |
| Claims on the 2026 home page | "+200 Mil Advogados Satisfeitos" and logos of state bar associations (OAB) under "Quem confia em nós" | C | Company's own statements, with no source or date. Not verified. | [3] |
| Time from launch to the case-study date | 15 months | calc | Calculated: June 2023 to September 2024. If the figure is from 2023, as the text suggests, it was reached within about 3 months. | [1, 4] |

How to read this table: grade D is a single report that no second source confirms. Grade C is a statement by the company on its own pages. A grade X value was computed on this page. Portuguese quotations are followed by an English translation, marked "(translation)", which is not a source.

## When did ChatADV launch, and how did it grow? Timeline

From a WhatsApp bot built by one lawyer to an agent-based legal app, in about three years. Each entry carries its grade.

- **2017 to 2018** (grade D [1]): Dantas, a criminal lawyer, uses Google Ads to find clients for his law office.
- **Early 2023** (grade D [1]): He connects WhatsApp to the ChatGPT API, tests three bots and keeps only the legal assistant, WhatsGPT, at R$14.90 a month.
- **21 March 2023** (grade C [4]): First Wayback copy of the chatadv.com.br domain.
- **26 June 2023** (grade D [1]): ChatADV, rebuilt with partner Bernardo Azevedo, launches on his Instagram: about 400 trial users and 40 subscribers on the first day.
- **30 June 2023** (grade C [4]): The home page sells the WhatsApp assistant at R$19.90 a month and says it uses ChatGPT technology.
- **9 September 2024** (grade D [1, 2]): Date on the microsaas.com.br case study: about 230 paying users and R$2,300 a month, as the founder reported.
- **7 June 2024 to 15 August 2025** (grade D [5]): A No-Code Start-Up list says ChatADV bills R$70,000 a month, with no date for the figure.
- **6 November 2026** (grade C [3]): The home page sells an agent-based web app with case-law search, 300 skills and app connectors, Premium listed at R$277 a month.

## Why did ChatADV work?

### A distribution partner inside the niche

The case study's main lesson is the channel: Azevedo already had an audience of lawyers on Instagram, and his post brought the first 400 trial users. Dantas then reports 5 to 6 new subscribers a day from that organic reach and about 30 a day during paid campaigns.

### Short free trial, then a payment link

Users got 24 hours free, later planned as 3 days, and then a payment link inside the chat. The founder told the case study that the trial is where conversion happens.

### A lawyer building for lawyers

Dantas found the first users in the lawyers' WhatsApp groups he was already in. He chose the legal bot over medical and psychology bots because he knew the field and because health questions were too serious.

### From wrapper to harness

The 2023 product was a ChatGPT-based chat in WhatsApp. The 2026 product adds its own case-law database with court and case number for each citation, step-by-step skills per legal task, reviewer agents and a document editor. The home page calls this a "harness", the software around a model that makes it do a specific job.

## How it was built

These details come from the founder's account in the case study and from the company's own pages. They are grade C or D.

- WhatsGPT was built with a no-code, white-label WhatsApp automation tool bought with 15 other people, connected to the ChatGPT API.
- Costs at the start, according to the case study: R$50 for the WhatsApp automation licence and R$300 for a logo.
- For ChatADV, outside specialists rebuilt the infrastructure; the case study reports about R$10,000 spent.
- Support, e-books and a small WhatsApp community were run by Dantas himself, according to the case study.
- In 2026 the product runs in the browser at app2.chatadv.com.br, with a help centre, a status page and a blog.
- The 2026 product draws citations from its own case-law database and marks anything it could not confirm, according to the home page.

Sources: [1, 3, 4]

## Who tried this before ChatADV, and why did they fail?

Four companies in our database of failed startups tried to automate legal research or legal work and failed. The values below are from that database and are not independently verified.

The failed startups come from our database of dead startups, retold here in our own words; Its entries are AI-assisted summaries of public sources, so they carry no evidence grade.

### ROSS Intelligence (2015 to 2018; funding US$13M; cause: Competition)

- Promise: AI legal research that answers questions in plain language.
- Why it died: Lawyers stayed with Westlaw and LexisNexis, which had decades of data and high switching costs.
- Record: 

### Atrium (2017 to 2021; funding US$75M; cause: Product/Tech Failure)

- Promise: A law firm for startups run with automation software.
- Why it died: The automation could not handle real legal complexity, so it carried law-firm costs without law-firm quality.
- Record: 

### jEugene (2015 to 2018; funding US$120K; cause: Competition)

- Promise: Automated contract drafting and review for law firms.
- Why it died: Better-funded AI contract tools overtook it, and law firms adopted slowly.
- Record: 

### Glider (2012 to 2015; funding US$1.5M; cause: Competition)

- Promise: Contract management and negotiation in one place.
- Why it died: It could not stand out against DocuSign and Adobe Sign.
- Record: 

## What changed

ROSS and jEugene had to build their own language technology for legal text, and lost to incumbents with more data. In 2023 a lawyer could connect a ready-made model to WhatsApp with no-code tools for a few hundred reais, so the cost of a first version was close to zero and the test was only whether lawyers would pay.

The second difference is the channel. The predecessors sold to firms through slow sales cycles. ChatADV sold a low monthly price to individual lawyers through a partner's Instagram audience and lawyers' WhatsApp groups. The open question is whether a small product can stay ahead when the model providers and the large legal publishers add the same features.

## Can one person copy ChatADV now?

**Verdict: Yes, if you work in the niche.**

The method is plain: a professional builds a tool for their own profession on a ready-made model, and launches it through someone the profession already follows. What made it work was the founder's place inside the lawyer community, which an outsider cannot copy quickly.

1. Build a first version for your own profession with no-code tools and a model API, and charge from the first week.
2. Find a partner who already has the audience of that profession and launch through them.
3. Use a short free trial that ends with a payment link inside the product.
4. Over time, add what a general chat app lacks: a checked source database, task-specific instructions and an editor.

**What is still open.** Other professions with local law or local rules that general models handle badly: accountants, notaries, public-tender consultants, in any country with its own legal system.

## What could go wrong for ChatADV?

- **What is not verified.** The headline, R$2,300 a month of recurring revenue with about 230 paying users, rests on one source: the founder's account in Bruno Okamoto's case study on microsaas.com.br, on a page dated 9 September 2024 whose text places the launch "this year", which the June 2023 home page suggests was 2023. A No-Code Start-Up list (7 June 2024, updated 15 August 2025) states R$70,000 a month with no date or source; the two figures do not agree. No payment-processor profile, filing or later founder interview was found. A reader could look for a newer interview with Paulo Dantas or Bernardo Azevedo, or a revenue page from the payment provider.
- **Unsourced claims on the home page.** The 2026 home page says "+200 Mil Advogados Satisfeitos" (more than 200,000 satisfied lawyers), far above the 230 paying users of the case study, and shows the logos of nine state bar associations and lawyers' assistance funds under "Quem confia em nós" (who trusts us), without saying what the relationship is. Neither claim was checked.
- **Testimonials in 2023.** The June 2023 home page shows testimonials signed "Bernardo de Azevedo, Advogado" and "Paulo Sérgio, Advogado", the two partners named in the case study, without saying that they own the product. The 2026 page shows other lawyers, one with a bar registration number.
- **Dependence on model providers and WhatsApp.** In 2023 the product said it used ChatGPT technology and ran through a white-label WhatsApp automation tool; the case study does not say whether that tool used WhatsApp's official business API. The 2026 web app no longer depends on WhatsApp for the main product, but it still depends on outside model providers, which the home page does not name.
- **Competition.** Brazilian lawyers can use general chat apps and the AI features of large legal publishers; on this site, Jurisphere (India) and Drafty AI (USA) sell similar AI research and drafting to lawyers in other markets.
- **Professional responsibility.** The home page cites the Brazilian bar council's Recommendation 001/2024, which asks lawyers to supervise AI output and keep client secrecy, and says the lawyer stays responsible. Wrong citations in court filings are a known risk of legal AI; the company says its citations come from its own database and that unconfirmed points are flagged.

## Sources

1. microsaas.com.br, Bruno Okamoto: O poder do canal de distribuição do nicho: o caso de Paulo Dantas – ChatADV (page dated 9 September 2024) — https://microsaas.com.br/o-caso-de-paulo-dantas-chatadv/ (grade D). Read in full (pipeline download of 27 October 2026). Founder's account in Portuguese. Source for the MRR, users, prices, launch and team.
2. Internet Archive copy of the same case study, 5 October 2024 — https://web.archive.org/web/20241005144844/https://microsaas.com.br/o-caso-de-paulo-dantas-chatadv/ (grade D). Read the figures section. Confirms the same MRR and the September 2024 page dates.
3. ChatADV home page, Inteligência Artificial para Advogados — https://chatadv.com.br/ (grade C). Read in full (pipeline download of 6 November 2026; robots.txt allows all agents). Source for the 2026 product, prices and claims.
4. Internet Archive copy of chatadv.com.br, 30 June 2023 — https://web.archive.org/web/20230630040426/https://chatadv.com.br/ (grade C). Read in full. Source for the 2023 price, the ChatGPT basis and the 2023 testimonials; the CDX index gives the first copy of the domain on 21 March 2023.
5. No-Code Start-Up: 15 exemplos de Micro SaaS IA que já estão faturando (7 June 2024, updated 15 August 2025) — https://nocodestartup.io/faturando-com-microsaas-de-ia (grade D). Read in full (pipeline download of 6 November 2026). A list with one line per product; source only for the undated R$70,000 claim.
6. Federal Reserve H.10 historical rates, Brazil (release of 2 November 2026) — https://www.federalreserve.gov/releases/h10/hist/dat00_bz.htm (grade A). Read the rows for 9 September 2024 (5.6042) and 30 October 2026 (5.4252 BRL per USD).
7. Database of failed startups, local export — /method/#dead (grade C). Local export. AI-written summaries, not independently verified. Source for the failed predecessors.

Contact: aiolum@livyden.com. Run ChatADV? Send corrections or a verified figure to aiolum@livyden.com (subject: Correction: ChatADV).