Write better prompts, get better results
Every prompt is scored independently across the dimensions that drive output quality — derived from peer-reviewed research, not vibes.
Same prompt, same score, every time.
No round-trip to a model provider — results in milliseconds.
< 50 msPrompts are never sent to a third-party model. Zero server-side retention.
Built on the MePO framework and Google Research's IFEval.
Why teams choose Promptivo
Repeatable, defensible prompt evaluation grounded in linguistics and academic research — not another LLM grading another LLM.
Same prompt in, same score out — every time. No model drift, no run-to-run variance, no surprises in CI. Reproducible by construction.
No LLM in the loop at scoring time. Deterministic linguistic analysis feeds frozen, judge-calibrated scoring heads — and returns in milliseconds.
Your prompts are not sent to any third-party model provider, and they are not retained server-side. Zero retention, no training data leaks.
Built on the MePO framework (Zhu et al., arXiv:2505.09930, EACL 2026) for the seven merit dimensions, and on Google Research's IFEval for verifiable constraints.
We score our own work — and publish it: IFEval's 541 expert prompts average 3.09/5, and scoring is validated against two independent LLM judges, hold-out data and all. Numbers, not vibes.
English gets the full linguistic analysis; Latin-script languages get structural signals; other scripts get honest structure-only scoring. The tiers are documented, not oversold.
Generous free tier, no credit card. Paste a prompt, see the breakdown, take the advice.