Productivity comparison
Aidetector Cx vs Grammarly
Screening text, images, video and voice for AI-generation signals before publication or submission · Business writing, grammar, tone, and communication quality across apps
| Decision point | AIDetector.cx | Grammarly |
|---|---|---|
| Best for | Screening text, images, video and voice for AI-generation signals before publication or submission | Business writing, grammar, tone, and communication quality across apps |
| Category | Productivity | Productivity |
| Price | Free (5 trial checks) + Pro $12/mo ($120/yr) - Pro Plus $29/mo ($290/yr) - Business $79/mo ($790/yr) | Free + paid plans |
| AIToolsEssentials editorial score | 4.0/5 | 4.4/5 |
Scores are editorial product assessments — job fit, likely output quality, ease of adoption, and operational cost — not lab benchmarks, and no tool here has a published hands-on result. How we score.
Evidence status
Free: 5 introductory checks total (1 guest + 4 signed-in), no recurring reset. Pro US$12/month or US$120/year - 300 credits/month. Pro Plus US$29/month or US$290/year - 1,000 credits/month. Business US$79/month or US$790/year - 3,000 credits/month with up to 5 team seats. Annual billing is charged upfront and grants credits monthly on the renewal cycle. Credit costs vary by job: standard text/image/video detection 1 credit, advanced image & deepfake analysis 4 credits/image, forensic video & deepfake 6 credits per 30s, citation verification 1 credit per 5 references, hallucination checking 2 credits per 1,000 words. Verified 2026-10-08 from /pricing plus the shipped /assets/index-*.js monthlyPrice literals (12/29/79), which agree.
Official sources checked 2026-10-08Open verification questions
- Payment processor attribution differs across two live legal pages - the Privacy Policy names Paystack for billing while the Cookie Policy names Stripe (plus a Stripe cookie table). Both may be accurate for different layers, but the checkout flow was not exercised.
- No independent third-party accuracy evaluation is published; the benchmark figures are the vendor's own results on a 400-document internal corpus.
- Security posture is now unanswered rather than contradicted - the former 'SOC-2 Type II Certified' footer claim was removed in the 2026-10-08 fix, and no replacement certification or audit detail is published.
- The free tier is five one-time introductory checks (1 guest + 4 signed-in), not a recurring free plan.
Not a FormSubmit submission - an inbound affiliate/partnership offer to partnerships@aidetector.cx, held from 2026-10-06 pending two publication blockers. Editorial entry written independently; no vendor copy reused. Both blockers verified cleared on the live site 2026-10-08: (1) the training-use contradiction is gone - both /detector and /privacy now state submitted analysis text is not used to train or fine-tune detection models on any plan, and the old Enterprise/Professional-scoped opt-out sentence no longer exists; (2) the four named third-party testimonials (Forbes / Stripe / HubSpot / Nature Portfolio) have been removed from /detector. The vendor also removed the SOC-2 Type II footer claim and the 98.7% / 1.2s / 12.4M+ / 142+ marketing figures. Verified the same day from the live pages: /pricing (plans 12/29/79 monthly, 120/290/790 annual, 300/1,000/3,000 credits), /privacy (data controller AIDetector.cx Inc., Berkeley CA; 12-month analysis history retention, deletable from the dashboard; no training use), /terms (you retain ownership of submitted content; output licensed for personal or commercial use; governed by California law), /cookies (Cloudflare / Stripe / Supabase), and a sitemap listing ~40 pages. Operator: AIDetector.cx Inc., a named legal entity, not a sole-proprietor microsite. Name is shared with unrelated live detectors on aidetector.com and aidetector.ai, so the listing carries the exact .cx domain. Affiliate terms confirmed in writing 2026-10-08 - 30% recurring on eligible subscription payments for the lifetime of the customer, monthly and annual eligible, 30-day attribution window, 30-day hold, $50 minimum payout.
Free: $0/month and 100 generative-AI prompts per month. Pro: displayed at $12 USD and includes 2,000 AI prompts per member per month, unlimited personalized suggestions, full-sentence rewrites, tone controls, plagiarism checking, and AI-generated-text detection. Enterprise: contact sales and includes unlimited prompts per member per month plus enterprise controls. The extracted pricing page did not unambiguously expose the billing cadence attached to the displayed $12 Pro amount.
Official sources checked 2026-09-18Open verification questions
- The billing cadence represented by the $12 Pro price was not rendered unambiguously in the retrieved official pricing text.
- Grammarly's exact treatment may differ for negotiated Enterprise agreements, which are governed by a separate Customer Business Agreement rather than the public self-service terms.
Official sources confirm AI drafting, rewriting, tone adjustment, fluency suggestions, grammar assistance, plagiarism checking, and AI-text detection. For Free, Premium, and single-user Pro accounts, Product Improvement and Training is enabled by default, but users can opt out; when disabled, user content is not used for model training, validation, or product improvement. Multi-user accounts bought directly online are also enabled by default, with an administrator opt-out. Enterprise-tier, sales-purchased Pro/Business, and Education accounts have training disabled by default. Grammarly says its external LLM service providers may receive prompts and context to provide generative features but may not train their models on user content. Under the October 29, 2025 Superhuman terms, inputs and outputs are User Content, and users own all right, title, and interest in User Content; the terms also grant Superhuman a broad license for operating, improving, customizing, and developing its services.
How to decide
Match each platform to your actual workflow constraints. Run one real workflow in each finalist before paying.
Quick recommendation
Use the trial checklist on each review page and the free scorecard to record time-to-result, corrections needed, and monthly cost at your expected volume before committing to a plan.
Read AIDetector.cx review Read Grammarly review Open scorecard