Whats 1Code? An app to run your Claude Code agents in parallel that works on Mac and Web. On Mac - run locally, with or without worktrees. On Web - run in remote sandboxes with live previews of your app, mobile included, so you can check on agents from anywhere. Running multiple Claude Codes in parallel dramatically sped up how we build features.
Hi It’s Serafim and Sergey from 21st.dev, in the last 10 months we’ve built and launched 9 products, getting over 1 millions total users, $200k in revenue, and 10k GitHub stars.
Motivation
Claude Code has been our go-to for 4 months. When Opus 4.5 dropped, parallel agents stopped needing babysitting.
You could finally run multiple and trust them. But the more agents we ran, the more the CLI felt like a limitation, not a feature.
So we built 1Code.dev
What’s next:
Bug bot for identifying issues based on your changes; QA Agent, that check that new features dont break anything
Adding OpenCode, Codex, other models and coding agents.
API for starting Claude Codes in remote sandboxes. Debugging and spotting errors in AI Coding Era is more critical than ever
Try it:
We're open-source, so you can just bun build it.
Paid tiers exist too - for us it’s gonna be highest signal that we're on the right track.
Either way, we'd love to hear your feedback!
About 1Code on Product Hunt
“Open source Cursor-like UI for Claude Code”
1Code launched on Product Hunt on January 16th, 2026 and earned 597 upvotes and 53 comments, earning #1 Product of the Day. Whats 1Code? An app to run your Claude Code agents in parallel that works on Mac and Web. On Mac - run locally, with or without worktrees. On Web - run in remote sandboxes with live previews of your app, mobile included, so you can check on agents from anywhere. Running multiple Claude Codes in parallel dramatically sped up how we build features.
On the analytics side, 1Code competes within Developer Tools, Artificial Intelligence, GitHub and Vibe coding — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how 1Code performed against the three products that launched closest to it on the same day.
Who hunted 1Code?
1Code was hunted by Serafim. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of 1Code including community comment highlights and product details, visit the product overview.
Serafim