AI rewriting tool
Looking for a StealthGPT alternative?
An API-first tool for generating and rewriting text intended to read as human-written, aimed at developers and at volume. MonkeyPen is a different shape of tool, and this page is a comparison rather than a pitch — so the table starts with what StealthGPT does better, and there is a section on when you should stay put.
StealthGPT vs MonkeyPen, side by side
| StealthGPT | MonkeyPen | |
|---|---|---|
| Genuinely better at | Being programmable. It has a real API and is built to be called from your own software, which is a legitimate need we do not serve at all — we have no public API. | We are a page you paste into. There is nothing to integrate, no key to manage, and the whole product is one box and two dropdowns. |
| Known for | An API-first tool for generating and rewriting text intended to read as human-written, aimed at developers and at volume. | 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 StealthGPT if…
……you are building this into something. A web form is not an API and we will not pretend otherwise.
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 →
StealthGPT 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.