AIQualityHQ vs Grammarly Comparison 2026
Both cover ai content tools. Here is what separates them on price, billing, what you can take with you, and coverage.
Free, browser-native AI prompt quality checker, rewriter, and security scanner running 100% locally.
The second pair of eyes on everything you write
At a glance
- Both have a genuinely free tier.
Side by side
| AIQualityHQ | Grammarly | |
|---|---|---|
| Starting price | Not listed | From $12 |
| Pricing model | Free plan, paid tiers | Free plan, paid tiers |
| Free tier | Yes | Yes |
| Billing | Not stated | Monthly or annual |
| Free trial | Not stated | 7 days |
| API | Not stated | Not stated |
| Data export | Not stated | Not stated |
| Their cut | Not stated | None |
| Runs on | Not stated | Not stated |
| Covers |
Shaded rows are where the two answers disagree and both listings have answered. A row where one side has not stated a fact is left plain, because silence is not a difference.
AIQualityHQ
Free, browser-native AI prompt quality checker, rewriter, and security scanner running 100% locally.
AIQualityHQ is a free, browser-native toolkit for AI developers, QA teams, and prompt engineers. It allows users to score prompts across 6 core dimensions, refactor raw instructions for specific LLMs, optimize token costs, and scan for prompt injection and jailbreak threats using a deterministic engine that runs entirely client-side for complete privacy and instant execution.
Only on this side
- Covers research & trends
Grammarly
The second pair of eyes on everything you write
Grammarly catches the mistakes that get noticed in a sponsor email or a video description, and it does it inside whatever box you are typing in rather than in a separate app. The free tier covers spelling, grammar and tone. Rewriting, plagiarism detection and the larger prompt allowance sit behind Pro.
Only on this side
- Covers writing & scripts
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.