PromptPerfect
Automated prompt optimization tool for text and image models — shutting down September 2026.
Description
Short Intro: PromptPerfect was an AI-powered prompt optimization platform built by Jina AI, a Berlin-based AI company founded by Han Xiao. Elastic (NYSE: ESTC) acquired Jina AI in October 2025 for its embedding models and neural search technology, and scheduled PromptPerfect for shutdown since the product sits outside Elastic's enterprise search roadmap. New signups closed in June 2026, the platform shuts down September 1, 2026, and user data is deleted October 1, 2026. Existing users can export saved prompts via Settings before the September deadline.
Key Capabilities:
Automated prompt rewriting for clarity, coherence, and task alignment across LLMs including GPT-4 and Claude
Multi-model support for both text models and image generation models including DALL-E, Midjourney, and Stable Diffusion
Reverse prompt engineering by uploading an image to extract and improve the generating prompt
Multi-goal optimization balancing quality, cost, and token efficiency simultaneously
Context-sensitive prompt improvement based on intended use case
REST API for programmatic prompt optimization
Browser extension for in-browser prompt refinement
Alternative tools
- OpenAI Playground
Browser-based prompt iteration environment for the OpenAI API.
- PromptHub
Git-style version control and collaboration platform for LLM prompts.
- Agenta
MIT-licensed LLMOps platform for prompt engineering, evaluation, and tracing.
- Vellum
LLM development platform for prompt engineering, testing, and deployment.
- Sourcegraph Cody
Enterprise AI coding assistant with multi-repository context retrieval
- Arize Phoenix
Trace every step your LLM agent takes, from prompt to response