Head to head · Writing · updated Oct 26, 2026
Turnitin vs Sapling
Turnitin scores 27 to Sapling's 17 on public evidence for AI content detection, and they rank #1 and #2 there. Only Sapling has a free tier. Numbers below are the same public signals the ranking uses, recomputed nightly — nothing here is sponsored.
Turnitin
The dominant academic plagiarism checker, with an AI-writing indicator built into its similarity reports.
+ Already deployed at most universities, so AI scores appear inside the workflow instructors use.
− No individual access, and its AI indicator has led to disputed accusations against students.
Sapling
Writing assistant for support teams, with a free AI-content detector.
+ The detector is free and gives a per-sentence score.
− Detection is a side feature - the product is really autocomplete for agents.
Side by side
public evidence| Turnitin | Sapling | |
|---|---|---|
| Evidence score / 100 | 27 | 17 |
| GitHub stars | closed source | closed source |
| Hacker News stories, 30d | 2 | 1 |
| Release-feed mentions, 30d | 1 | 0 |
| Last activity | 1 days ago | – |
| Pricing | Paid · Institutional licensing only | Free tier · Free detector and basic assistant; paid per seat |
| Platforms | web | web, api, chrome-extension |
| Maker | Turnitin | Sapling.ai |
Which one?
Pick Turnitin if
- you want the stronger public evidence (27 vs 17)
Best for institution-wide academic integrity.
Pick Sapling if
- you want a free tier to start on
- you need it on api, chrome-extension
Best for support replies plus a free detector.