# Paulo Castellano
Building since 2018. Not reviewed by Paulo.
Page: https://mrrmaker.com/@paulocastellano
Sold Doctor Engage (2018), then built Changelogfy to $2,900 MRR (2026)
In their words: "Construo produtos SaaS que vendem em mais de 50 países." (paulocastellano.com)

## Numbers
- Revenue: $2,900 MRR, Changelogfy (stated · Oct 2026)
- Total revenue so far: $157.5K, Changelogfy (stated · Oct 2026)
- Products: 9
- Building since: 2018

## Products
- TryPost (2026 →): running
- Changelogfy (2019 →): running
- LaunchStack (2023): unknown
- Doctor Engage (2018): sold, sold to an undisclosed buyer

## Timeline
- May 2026: Launched TryPost [stated]
- May 2026: TryPost: Released TryPost 1.0 [stated]
- Sep 2025: Exit at BoaConsulta, as stated in 2025 [stated]
- Jun 2025: Changelogfy: Removed the free plan and required a card for the trial; MRR grew 50% [stated]
- Mar 2023: Launched LaunchStack [stated]
- Aug 2019: Launched Changelogfy [stated]
- Aug 2019: Changelogfy: Left beta and announced paid plans [stated]
- Apr 2018: Sold Doctor Engage to an undisclosed buyer [stated]
- Apr 2018: Launched Doctor Engage [stated]

## How sure
0 verified by someone other than Paulo, 48 stated by Paulo in public, 2 outdated. Read on 11 Oct 2026.

## Sources
- Paulo Castellano, paulocastellano.com: https://paulocastellano.com
- github.com: https://api.github.com/users/paulocastellano
- Paulo Castellano - Indies Club, indies.club: https://indies.club/@paulocastellano
- Changelogfy - Indies Club, indies.club: https://indies.club/startups/changelogfy
- TryPost - Indies Club, indies.club: https://indies.club/startups/trypost
- Sendkit - Indies Club, indies.club: https://indies.club/startups/sendkit
- Clickbase - Indies Club, indies.club: https://indies.club/startups/clickbase
- Lua - Indies Club, indies.club: https://indies.club/startups/lua
- Indies Club - Indies Club, indies.club: https://indies.club/startups/indies
- Why did I decide to create a solo startup?, changelogfy.com: https://changelogfy.com/blog/how-i-decided-to-create-a-solo-startup-from-scratch
- Why We Killed Our Free Plan — And Grew MRR by 50%, news.paulocastellano.com: https://news.paulocastellano.com/p/why-we-killed-our-free-plan-and-grew
- SendKit.dev: após 5M+ de emails enviados, o que eu aprendi construindo minha própria infraestrutura de email., news.paulocastellano.com: https://news.paulocastellano.com/p/sendkitdev-apos-5m-de-emails-enviados
- We're live on Product Hunt! 🚀, news.paulocastellano.com: https://news.paulocastellano.com/p/were-live-on-product-hunt
- Introducing TryPost.it 🚀, news.paulocastellano.com: https://news.paulocastellano.com/p/introducing-trypostit
- I built an open source SQL client, news.paulocastellano.com: https://news.paulocastellano.com/p/i-built-an-open-source-sql-client
- The Power of Building your own Audience, news.paulocastellano.com: https://news.paulocastellano.com/p/the-power-of-building-your-own-audience
- Startup Summit Floripa 2025: building from Brazil for the world, news.paulocastellano.com: https://news.paulocastellano.com/p/startup-summit-floripa-2025-building
- Agentic Social Media Scheduling Tool — TryPost, mrrmaker: https://trypost.it/en

Labels: "verified" means confirmed by someone other than the founder; "stated" means the founder said it in public. Method: https://mrrmaker.com/how-it-works