Paulo Castellano
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SendKit.dev: após 5M+ de emails enviados, o que eu aprendi construindo minha própria infraestrutura de email.
Eu não queria criar sequências de email na mão, então decidi construir uma ferramenta onde a AI faz isso por mim.
mar 18
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Paulo Castellano
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Mais recentes
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Anthropic dentro do Office / GPT-5.4 usa PC / Claude hackeou teste
A Microsoft colocou a Anthropic dentro do Word, Excel e Outlook. Não é plugin. É o motor principal do novo Copilot Cowork.
mar 10
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Paulo Castellano
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Trump bane Claude / OpenAI + Pentágono / Claude Code no 📲
O governo americano proibiu a Anthropic e consequentemente o app foi para o top #1 da App Store.
mar 2
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Paulo Castellano
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Pentágono ameaça Anthropic / Ads no ChatGPT / US$ 30 bi numa rodada só
O Pentágono ameaçou cortar US$ 200 milhões da Anthropic porque ela se recusou a liberar o Claude pra uso militar. Enquanto isso, quem usa ChatGPT…
fev 23
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Paulo Castellano
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I built an open source SQL client
A modern interface with query editor, Backups, Restore, ER diagrams, SSH tunneling, and more.
fev 15
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Paulo Castellano
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Web Summit 2025: What it was like bringing Pipeback to Lisbon
I returned from Lisbon a few days ago and I’m still processing everything that happened at Web Summit 2025.
nov 18, 2025
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Paulo Castellano
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Startup Summit Floripa 2025: building from Brazil for the world
I spent three full days at Startup Summit in Florianópolis.
set 2, 2025
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Paulo Castellano
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Building a Global SaaS as an Indie Hacker: Your Path to $10k MRR and Beyond
As an indie hacker, the dream is often about impact and leverage: creating something valuable that solves a real problem and can scale beyond your…
jun 12, 2025
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Paulo Castellano
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Why We Killed Our Free Plan — And Grew MRR by 50%
Hey founders,
jun 6, 2025
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Paulo Castellano
Learnings from SaaStr 2025: AI, Networking, and Brazilian People
Last week, I had the chance to attend SaaStr Annual 2025 in San Francisco — and it left me rethinking a few assumptions I didn’t even realize I was…
mai 22, 2025
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Paulo Castellano
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Paulo Castellano
Building the future with AI 🤖
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