Promptiff
Compare AI output against every prompt you gave it
Details
- External ID
- 1259296
- Source
- PH
- Company
- —
- Product
- Promptic
- Website domain
- producthunt.com
- Launched
- Sept. 24, 2026
- Cohort
- —
- Upvotes
- 2
- Upvotes percentile
- 0.7405388069275176
- Tags
- Open Source, Developer Tools, Artificial Intelligence, GitHub
- Fetched at
- Sept. 26, 2026, 1:01 a.m.
- Updated at
- Sept. 26, 2026, 1:01 a.m.
Description
Promptiff helps you review AI-written documents against the original instructions. Select one or more prompt turns and an output, inspect sentence-level matches, and find possible omissions or additions. Switch between semantic, word, Git-style, and character views. The open-source CLI, canvas, and Agent Skill run locally; remote embeddings are optional and require an explicit choice.
Enrichment
- Theme
- AI text humanizers and detectors
- Vertical
- Horizontal
- Function
- Observability & eval
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Commercial product
- Normalized one-liner
- diff and comparison tool for ai outputs against prompts
- Manually corrected
- False
Could you build this?
Yes Text comparison between prompts and generated text relies on standard text diff algorithms (like diff-match-patch) combined with embeddings for semantic sentence alignment.
Competitors
Other products that read as similar to this one — 106 launches clear the similarity bar, closest 8 shown.
Attention rank: #21 of 107 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 239 days after the earliest competitor.
- Promptdoo.com · ph · 2026-09-15 · 2 upvotes · similarity 0.51
- AI Prompt Engineer · ph · 2026-09-28 · 1 upvotes · similarity 0.48
- Prompt Library · ph · 2026-09-22 · 1 upvotes · similarity 0.47
- Can you really detect AI writing from human writing? · hn · 2026-05-13 · 7 upvotes · similarity 0.46
- Promptnote · ph · 2026-09-26 · 1 upvotes · similarity 0.46
- PromptFlip · ph · 2026-09-17 · 1 upvotes · similarity 0.45
- Which Draft · ph · 2026-09-18 · 4 upvotes · similarity 0.41
- AIPromptPro · ph · 2026-09-15 · 2 upvotes · similarity 0.41
Other launches for this product
Same idea, different domain
Nobody's really built a observability & eval tool for Media & entertainment yet.