# Rune

> Updated 2026-09-11 · type: tool · category: ai-infrastructure · status: active · rev 1

Rune, the keyboard-driven GPU-rendered IDE with built-in AI agents, is now open source under GPL-3.0.

- Open source: yes (GPL-3.0)
- Self-hostable: yes
- Pricing model: free
- Best for: Builders who live in a terminal-and-editor loop and want an integrated, agent-aware environment they can inspect and own rather than rent.
- Last verified: 2026-09-11

- **Canonical:** https://gtmstacker.com/registry/tool/rune/
- **Source:** [github · unstablebuild/rune](https://github.com/unstablebuild/rune)
- **Tags:** ai-infrastructure, ide, developer-tools, agents, gpl, open-sourcing
- **Repository:** https://github.com/unstablebuild/rune

## Is Rune open source?

Yes, Rune is open source under the GPL-3.0 license.

## How much does Rune cost?

Rune is free to use.

## Can I self-host Rune?

Yes, Rune can be self-hosted (the source is available under the GPL-3.0 license).


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Rune, a fast GPU-rendered keyboard-driven IDE (Go) that folds code, terminals, CLI tools, language intelligence, debugging and AI agents into one multi-workspace environment, just went open source under GPL-3.0 — a polished commercial-grade dev environment moving to a copyleft license.

## Provenance

- GPL-3.0 independently WebFetch-verified 2026-09-11 at github.com/unstablebuild/rune (45★, 4,039 commits, active CI on Linux/macOS; Go). Open-sourcing announced on the vendor blog ("Rune is now open source", 2026-09-11) and surfaced via the 2026-09-11 daily pull (HN frontpage).
- Curated from the GTM Stacker signal registry (2026-09-11 pass: daily pull + viral-posts brief); license independently WebFetch-verified 2026-09-11.

## Why it matters for a GTM stack

Another day, another "now open source" — the part worth reading is the license class. GPL-3.0 core plus a permissive SDK is a deliberate structure: use it freely, extend it via the Apache-2.0 SDK, but forks of the core stay open. If your team is standardizing an agent-integrated dev environment, that structure is the governance story to evaluate, not the star count.