Chat data exports, $1.1K MRR: five Chrome extensions

Mastros sells Chrome extensions that export data from WhatsApp, Telegram, LinkedIn, Instagram and TikTok. Its $1.1K MRR is verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026.

What it actually sells

Mastros builds privacy-first Chrome extensions that export WhatsApp, Telegram, LinkedIn, Instagram and TikTok data to CSV, XLSX, JSON or JSONL in the browser. Its five extensions cover those five platforms.

How it charges

The WhatsApp extension has a free plan with three tools: “Three simple tools. You get all three on the free plan.”

Month by month

Monthly revenue as read from the payment provider by TrustMRR, in US dollars, as of September 30, 2026.

Month	Revenue (USD)
2026-05	$60
2026-06	$60
2026-07	$192
2026-08	$300
2026-09	$1,053

Where customers come from

Mastros for WhatsApp is published on the Chrome Web Store. The founder lists app store optimization, SEO, influencers, YouTube, Reddit and Facebook as growth channels.

What stands out

The site shows 2,100+ weekly active users, 152 reviews with a 4.95 rating, and 341 users with 47 reviews for WhatsApp. Mastros reports $1.1K MRR, verified through the payment provider's API by TrustMRR (Stripe), as of 2026-09-30.

From the official site

Three simple tools. You get all three on the free plan.

Save members, messages, contacts, shared groups and files from Telegram Web.

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

Mastros's $1.1K MRR is higher than 76% of the 5,602 projects with payment-verified revenue in our dataset; the median across them is $150. Within the “Crypto & Web3” category (33 projects) it is higher than 70% (category median $428). Snapshot: 2026-09-02 to 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

My view is that this needs real work. The buyer is someone who wants platform data in a spreadsheet or structured file format, and demand has to be reached through the Chrome Web Store and the listed acquisition channels.

The difficult parts are keeping exports working as platforms change, handling support for multiple data types, and competing for attention in extension searches. Privacy claims and data handling also add compliance work.

Verdict: Needs real work.

One thing to take from it

Mastros groups several data-export use cases across five Chrome extensions, while the WhatsApp product has a free plan with three tools. The site reports 2,100+ weekly active users and 152 reviews with a 4.95 rating.

Sources

Mastros official website, fetched October 1, 2026
Mastros pricing page, fetched October 1, 2026
Mastros about page, fetched October 1, 2026
TrustMRR: revenue verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure