Changelogfy
changelogfy.com
Feedback collection, release notes, roadmap and knowledge base platform for product teams.
$3.9K MRRTrustMRR ↗
Paulo Castellano
Brazilian maker of Changelogfy, TryPost and SendKit with verified revenue on TrustMRR
@paulocastellano Brazil9.3K followers$6.2K MRRVerified on TrustMRR ↗SaaS FoundersMarketing & SEO ToolsOpen Source Makers
About Paulo Castellano
Paulo Castellano is a Brazilian developer and founder who builds small SaaS products for product teams and creators. He previously co-founded Boa Consulta, a healthcare booking startup that was acquired by Pixeon.
His longest-running product is Changelogfy, a platform for collecting user feedback, publishing release notes and sharing product roadmaps, based in São Paulo. He wrote publicly about removing its free plan and requiring a card for trials, which he says grew MRR by 50%. Newer products include TryPost, an open-source social media scheduler with a paid cloud version that he is building in public on TrustMRR, and SendKit, an email API and marketing platform for developers and AI agents.
TrustMRR shows about $6.2K in combined MRR across Changelogfy and TryPost and roughly $152K in verified lifetime revenue as of October 2026. He also writes a weekly newsletter about building products with AI.
Products by Paulo Castellano
TryPost
trypost.it
Open-source social media scheduler with an agent-friendly cloud version.
$2.4K MRRTrustMRR ↗
SendKit
sendkit.dev
Email API, SMTP and marketing platform for developers and AI agents.
Healthcare appointment booking startup, acquired by Pixeon.
Videos with Paulo Castellano
Como micro-SaaS abriu portas internacionais | Paulo Castellano (@changelogfy e @pipeback )
InterviewDev Afora· 2026
COMO CRIEI UM MICRO SAAS QUE FATURA $5 MIL DÓLARES POR MÊS NO PILOTO AUTOMÁTICO
Own channelPaulo Castellano· 2025
Revenue
Paulo Castellano has publicly reported $6.2K MRR (Oct 2026) (as of 2026-10). Source
Live, payment-provider-verified numbers for Paulo Castellano's products are on TrustMRR: View on TrustMRR ↗
How Paulo builds
- Charge early: removing a free plan can grow revenue.
- Build in public with verified numbers.
- Open-source the product and sell the hosted version.
Learn from Paulo Castellano
[newsletter]
Paulo Castellano newsletter
Weekly five-minute newsletter on building products with AI.
Paulo Castellano FAQ
What products has Paulo Castellano built?
He runs Changelogfy, TryPost and SendKit, and previously co-founded Boa Consulta, which was acquired by Pixeon.
How much do Paulo Castellano's startups make?
TrustMRR showed about $6.2K in combined MRR for Changelogfy and TryPost in October 2026.
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