Sapling AI (sapling.ai) is an AI language model platform founded in 2018 that provides writing assistant tools, customer service automation, API, and full SDKs. While their primary focus is developer toolkits for businesses, they also have an AI detector.
Pros
- 6 out of 7 AI detection against LLMs
- Reasonable AI detection usage and browser integration for free.
Cons
- 5 of 8 AI-humanized texts failed detection.
- Test results included 8 false positives.
Features
- AI writing: Writing assistant, suggestions, and predictive text.
- Grammar checker: Advanced grammar, spelling, and punctuation fixes.
- Chat assist: Live customer support response recommendations.
- Snippets: Shortcuts for saved responses and templates.
- AI detector: Text and files (PDF and DOCX only).
- Business platform integration (extensions)
- Windows integration
- Mac integration
- API
- SDK
Pricing Plans
| Free Plan | Pro | Enterprise |
| No signup required | $25/month or $144/year | Starts at 10 seats, $15/seat/month |
| Unlimited queries, only 2,000 characters per query | Unlimited queries, up to 50,000 characters per query | Unlimited queries, up to 50,000 characters per query |
| Basic writing suggestions, 20 snippets, and use on free domains. | Advanced suggestions, autocomplete, unlimited snippets, and use on premium domains. (Separate usage plan for API.) | All features (separate usage plan for API). |
Test #1: Sapling.ai vs. AI-Generated Content
For this test, the same prompt was given to the top LLMs to see if Sapling.ai would be able to detect non-human writing.
Prompt Used
“Write a 500-word article about the declaration of independence with the intent of being factual while also trying to sound as human as possible, specifically to pass AI detectors. Remove all em dashes in your generation.“
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| LLM | Test Result | Proof |
| ChatGPT – 5.4 Thinking Model | 100% AI
✅ |
 |
| Claude – Sonnet 4.6 | 98% AI
✅ |
 |
| Google Gemini – Thinking | 100% AI
✅ |
 |
| DeepSeek – DeepThink | 100% AI
✅ |
 |
| Perplexity – Free Model | 100% AI
✅ |
 |
| Grok – Auto | 99.4% AI
✅ |
 |
| Meta | 50.2% AI
🟡 |
 |
Test #2: Sapling.ai vs AI Humanizers
This test was undertaken to determine whether Sapling.ai could detect AI Humanizers. We used the article generated by Meta from the test above and ran it through the eight AI Humanizer platforms listed below. Each humanized text was then run through Sapling’s AI detector.
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| AI Humanizer | Test Result | Proof |
| Humanize.ai | 0% AI ❌ |
 |
| StealthGPT | 41.8% AI 🟡 |
 |
| WriteHuman.ai | 21.5% AI ❌ |
 |
| Undetectable.ai
|
99.9% AI ✅ |
 |
| StealthWriter.ai | 2.7% AI ❌ |
 |
| WalterWrites.ai | 38.3% AI ❌ |
 |
| Grammarly | 66.4% AI ✅ |
 |
| QuillBot | 75.1% AI ✅ |
 |
Test #3: False-Positives
For this test, we wanted to test Sapling’s ability to detect human writing. Ten human-written texts were provided to Sapling’s AI detector to determine whether any false-positives occurred. The texts ranged from news articles to Wiki entries to fiction.
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| Article URL | Test Result | Proof |
| Wikipedia (Mahatma Gandhi)
(Source) |
98.3% Human
✅ |
 |
| The Brothers Karamazov (Chapter 1)
(Source) |
96.1% Human
✅ |
 |
| ScienceDaily (Article)
(Source) |
60.3% Human
🟡 |
 |
| Gilder Lehrman (Article)
(Source) |
59.7% Human
🟡 |
 |
| National Churchill Museum (Article)
(Source) |
50.4% Human
🟡 |
 |
| NPR (Article)
(Source) |
50.1% Human
🟡 |
 |
| CNBC (Article)
(Source) |
24.6% Human
❌ |
 |
| IBM (Article)
(Source) |
1.5% Human
❌ |
 |
| New Yorker (Short Story)
(Source) |
0.2% Human
❌ |
 |
| Wall Street Journal (Article)
(Source) |
0% Human
❌ |
 |
Is Sapling.ai Trustworthy?
Sapling.ai has a low Trustpilot score of 2.4. However, there are only seven total reviews; 3 x 5-star reviews and 4 x 1-star reviews.
The main complaint from users is Sapling’s inability to differentiate between AI and human writing.
Frequently Asked Questions
Is there a character limit for queries?
Yes, there is a 2000-character limit for free users. Pro users can enter queries up to 50,000 characters.[1]
Are sentence-by-sentence breakdowns provided?
Yes, although the breakdown is very basic. Very predictable text (likely AI-written) is highlighted in dark red, somewhat predictable text in light red, and less predictable (likely human-written) is not highlighted (see image).
Is document scanning included?
Yes, PDF and DOCX files can be scanned through the AI detector.[2]
Is image scanning provided?
No, Sapling does not provide image scanning.
Are reports shareable?
Yes, but the share certificate expires after three days (see image).
Does Originality.ai provide certifications?
Yes, Sapling’s “Share Certificate” link is both the report and certification, which expires after three days.
Is user content collected by Sapling?
Yes, Sapling may store and use text input to improve their services.[3]