PromptLedger

PromptLedger targets a well-documented production pain: prompt version chaos and cost black-boxes in teams shipping LLM features. Research across 27 platforms (May 2025–2026) confirms this is a top-3 operational challenge for teams with 10+ prompts in production. The non-engineer access gap is the clearest differentiator: incumbents either lack polished UX (Langfuse), outgrow quickly (PromptLayer), or are enterprise-priced and sales-gated (Humanloop at $99–150/mo). Per-prompt cost attribution combined with lightweight versioning in a single non-engineer-friendly tool is explicitly unoccupied. The $49–99/mo pricing band is proven. Build speed is realistic at 3–5 days for a focused MVP. The prior score of 19 holds — one dimension upgrades slightly on the strength of new evidence, netting to 20, triggering SHIP_IMMEDIATE.