Promptctl – Git for AI Prompts

Version control and management system for AI prompts. AI engineers constantly iterate on prompts but lack proper versioning; this tool lets them track changes, compare versions, and collaborate on prompt engineering like code.

Prompt engineering has matured from a curiosity into a real workflow bottleneck as teams ship LLM-powered products at scale, and the lack of tooling around it is a genuine gap that's only visible now that the practice is widespread. LangSmith and Weights & Biases both touch prompt tracking as part of broader ML observability platforms, but neither treats it as a first-class product, which leaves room for something purpose-built. The $500–2k/mo revenue band is realistic for a dev tool with a free tier and a small-team paid plan, though it signals this stays a lifestyle business unless it expands into evaluation, testing pipelines, or team collaboration features that justify higher ACVs. The biggest risk is that the major LLM providers — OpenAI, Anthropic, Google — bundle prompt versioning directly into their playgrounds and APIs, collapsing the wedge before any meaningful adoption is built.