1
3.01 reviewadded 2025
Freemium
Custom pricing
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9 Plagiarism Checker tools, ranked by readers
Every listed tool supports Plagiarism Checker. The order comes from 1 reader vote, never who paid. 5 have a free way in.
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4 data-backed ways into the list.
Top 5, side by side
The 5 most-voted tools on the facts readers ask about.
| Fact | #1 Smodin | #2 Copyscape | #3 Grammarly | #4 INK | #5 ProWritingAid |
|---|---|---|---|---|---|
| Reader votes | 1 | 0 | 0 | 0 | 0 |
| Rating | 3.0 (1) | 5.0 (1) | 5.0 (6) | Not rated yet | Not rated yet |
| Pricing model | Freemium | Paid | Freemium | Paid | Freemium |
| Starts at | Custom pricing | Custom pricing | $12/mo | $39/mo | $30/mo |
| Free way in | Yes | No | Yes | No | Yes |
| Saves | 1 | 0 | 4 | 0 | 0 |
| Added | 2025 | 2026 | 2026 | 2025 | 2026 |
What this costs
Here’s how all 9 tools break down by starting price.
Median entry price $12/moCheapest paid $5.83/moFree plan available 5 of 9
BoostedSponsored, does not affect rank
Your tool, in front of 9 competitors
Paid placements appear above the ranking, labelled honestly.
All 9 tools
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ToolPricingActions
Showing all 9 tools, ranked by 1 reader vote. Ties fall back to review count.
2
5.01 reviewadded 2026
Paid
Custom pricing
3
GrammarlyVerified
5.06 reviewsadded 2026
Freemium
From $12/mo
4
Not ratedno reviews yetadded 2025
Paid
From $39/mo
5
Not ratedno reviews yetadded 2026
Freemium
From $30/mo
6
QuillBotCheapest
4.02 reviewsadded 2025
Paid
From $5.83/mo
7
Not ratedno reviews yetadded 2025
Freemium
From $7.50/mo
8
Not ratedno reviews yetadded 2025
Freemium
Custom pricing
9
Not ratedno reviews yetadded 2026
Paid
From $135 one-time
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Community Discussion
Share your thoughts about the best tools for Plagiarism Checker
2 comments
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Takes a minute. No account needed.
- 1Nellie RayExpert
I’ve tried a few AI detectors, but none of them are 100% accurate. They might flag human writing as AI-generated.
- 0Gunay M.Legend
Agree, also I have a reverse case scenario, where AI-generated text was not detected as such. I guess there is still space for improvements
5 questions
Common questions
Answers derived from the tools on this page.
How many Plagiarism Checker platforms are there?
Siteefy's live index currently tracks 9 Plagiarism Checker platforms, with 4 added in 2026. The count updates automatically as tools are published or retired.
What is the best Plagiarism Checker platform right now?
Smodin holds the top spot on this list, rated 3.0 stars by the community. The ranking comes from reader votes, so the leader changes as votes come in.
Are there free Plagiarism Checker platforms?
Yes. 5 offer a free plan alongside paid tiers. Smodin is the highest-ranked option with a free way in.
How much do Plagiarism Checker platforms cost?
Paid plans start at $5.83/mo (QuillBot). Each row in the list above shows the tool's pricing model and starting price.
How is this Plagiarism Checker list ranked?
By reader votes: every vote moves a tool up or down, star ratings come from community reviews, and anyone can vote, review a tool, or suggest one that is missing.