PromptPerfect Is Sunsetting — Here's What I Switched To

PromptPerfect sunsets September 1, 2026. Elastic acquired Jina AI for their embedding models — the prompt tool wasn't part of the plan. No new signups after June, data cleanup by October 1. If it's been in your workflow, this is a good moment to upgrade. Here's what I've been using and why it clicked. The context engineering shift You've probably noticed the conversation has moved from "prompt engineering" to what Karpathy calls "context engineering." Less about clever phrasing, more about structuring context windows effectively, grounding outputs to reduce hallucinations, managing prompts across multiple models simultaneously, and measuring quality with real metrics, not vibes. PromptPerfect was solid for the 2023 version of this. The 2026 version needs different tools — and honestly, the tools that exist now are pretty great. What I switched to Prompeteer.ai approaches prompts the way developers approach code quality — with measurable signals and structured feedback. Prompt Score — l