LLM Playground OS
Local-first playground to test compare & version LLM prompts
Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.
Want to reach these readers? Sponsor an issue.
🛠️ Open-source, local-first workbench to test, compare, and version LLM prompts across multiple providers—including OpenAI, Anthropic, Gemini, Groq, and Ollama. Key Features: • Compare outputs side-by-side in real time • Track prompt variations and system instructions • 100% privacy-focused: runs locally without middleman servers • Multi-model support for cloud and local models (Ollama) Designed for developers, prompt engineers, and creators building AI workflows.
PH · launched Sep 6, 2026 · 1 upvote (top 69%) · 1 view
Niche: prompt engineering and management tools · 173 launches, 13 in the last 7 days ▼ -19% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- AI-native
- Hobby / open-source project
- GitHub
Visit website ↗ Source listing ↗
More like this: all 173 launches in prompt engineering and management tools →
Could you build this?
Yes This is a local developer UI (built with Tauri, Electron, or a local web server) integrating standard LLM API SDKs (OpenAI, Anthropic, Ollama) and storing prompt histories locally in SQLite or JSON.
Competitors
Other products that read as similar to this one : 172 launches clear the similarity bar, closest 8 shown.
Attention rank: #134 of 173 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 300 days after the earliest competitor.
- Prompt Workbench · ph · 2026-09-26 · 5 upvotes · similarity 0.51
- LLM Test Server · ph · 2026-10-22 · 22 upvotes · similarity 0.48
- LLM Onestop · hn · 2025-11-10 · 8 upvotes · similarity 0.45
- Llmpm · hn · 2026-03-09 · 6 upvotes · similarity 0.45
- LLM-Gateway · hn · 2026-03-27 · 7 upvotes · similarity 0.44
- Llmtop · hn · 2026-03-18 · 5 upvotes · similarity 0.44
- AI Council · hn · 2026-02-21 · 5 upvotes · similarity 0.43
- llm-gateway-comparison · github · 2026-09-17 · 59 upvotes · similarity 0.42
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.