AI rewriting tool
Looking for an Undetectable.ai alternative?
A rewriting tool built around getting AI-generated text past automated writing checkers, with bulk processing and a range of output settings. MonkeyPen is a different shape of tool, and this page is a comparison rather than a pitch — so the table starts with what Undetectable.ai does better, and there is a section on when you should stay put.
Undetectable.ai vs MonkeyPen, side by side
| Undetectable.ai | MonkeyPen | |
|---|---|---|
| Genuinely better at | Throughput and options. It handles large batches, offers a lot of dials for readability and purpose, and has built real tooling around processing volume — which is a genuinely different and harder engineering problem than rewriting one draft well. | We optimise the rewrite for a human reader with a specific job to do: a recruiter skimming your cover letter, a client reading your quote. That is the only thing we tune for. |
| Known for | A rewriting tool built around getting AI-generated text past automated writing checkers, with bulk processing and a range of output settings. | One job: taking a draft that reads like AI wrote it and making it read like you wrote it, for a specific kind of writing. |
| Day to day it feels like | Paste in, get a rewritten version out. The differences between these tools are what they optimise the rewrite for. | Paste, say what the text is and the tone you want, get a rewrite plus a short note on what changed and why. No workspace, no templates, no account. |
Stay with Undetectable.ai if…
……automated checkers are the outcome you are buying. That is what they built; it is not what we built, and we would rather tell you than sell you the wrong thing.
We would rather you kept the tool that fits than switched and went back a fortnight later. Nothing on this page is worth changing your workflow over unless the difference above is actually your problem.
What you get if you do switch
- A rewrite tuned to the text type. Tell it that it is a cover letter, an invoice reminder or a wedding speech and the instruction changes, because the reader changes.
- Writing insights, not just output. Every rewrite comes with three to five specific things that changed and why, plus one tip you can apply yourself next time.
- Nothing to set up. No account, no workspace, no brand kit. Paste, two dropdowns, done — 5 free every day.
- 100 pages that already know your case, each with the tool pre-set and the specific giveaway for that kind of writing.
- The same thing on your phone. MonkeyPen is an iPhone app too, at the same price.
Try it on the same paragraph
The only honest way to compare rewriters is to run one paragraph through both and keep the version you would actually send. Here is ours, free:
Paste a paragraph
No account. 5 free rewrites a day, then $5/month.
5 free today
removed added
Why it reads differently
Read it before you send it. Your name is on this, so fix anything that is not true of you and put back the one specific detail only you know.
More comparisons
See all 20 comparisons → · or go straight to your case: all 100 text types →
Undetectable.ai and other product names belong to their respective owners; this comparison reflects each tool’s publicly described focus and our own honest read of it, and none of them has endorsed it. We deliberately quote no prices, ratings or user numbers for other tools, because those change — check their own site for current details. MonkeyPen is a writing tool: it rewrites what you give it and keeps the facts, and you should read any rewrite before you send it.