Sergey Bunas' profile on Product Hunt

Maker History

21stInfra and UI building blocks for the agentic internet

21st Agents SDKMar 2026

21st.dev 2.0Jul 2025

1CodeOpen source Cursor-like UI for Claude Code

Jan 2026

Phion.devBuild in Cursor like in Lovable - auto start, save & deploy

Jun 2025

Replai AI Replies for LinkedIn & TwitterGPT-4 1-click replies for growth in LinkedIn & Twitter

Mar 2024

AI-driven replies generator for Twitter & LinkedInCreate meaningful replies 10x faster in 2 minutes with AI

Mar 2023

Forums

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2mo ago

IndexMachine - A lightweight and super fast page indexer that just works

Stuck in "Crawled: currently not indexed"? IndexMachine automatically submits your pages to Google, Bing, and now even to LLMs like ChatGPT (so your content shows up in AI answers, not just search results). It tracks everything, sends you daily reports, and alerts you when pages 404. You just connect your domains and let it run on autopilot.

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3yr ago

Featured

OpenAI launched the ChatGPT API, what will you build?

The ChatGPT API is finally here, and I couldn't be more excited to try it out, companies such as Snapchat, Shopify, and Instacart have already used it to build AI into their products. What will you build with it?

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3yr ago

Featured

Sergey Bunas

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IndexMachine - A lightweight and super fast page indexer that just works

OpenAI launched the ChatGPT API, what will you build?

Which books would you recommend for learning about scaling startups?