AI draft
I hope this message finds you well. I'm reaching out to share an exciting update: the Lisbon campaign has officially launched, delivering a 4.1% click-through rate and 1,250 sign-ups in its first week.
HumanGPT vs Walter Writes AI: pricing, rewriting and privacy compared
Walter Writes AI is an AI humanizer with a built-in AI detector, for the web, iPhone, Android and Chrome.12 HumanGPT is an iPhone app that rewrites AI drafts so they sound like you and checks the facts in the result. Here's how they compare, with a source for every claim about Walter Writes AI.
The short verdict
Both rewrite AI drafts and rate how AI-like the result reads. Walter Writes AI runs on more devices; HumanGPT checks facts and citations in every rewrite.
Choose HumanGPT if…
- Your draft has facts, figures or citations you want checked in every rewrite.
- You'd rather have 300 free words a day than a one-time trial.
- You want up to 3,000 words per rewrite and no ads.
HumanGPT vs Walter Writes AI at a glance
Numbers link to the sources below.
| Feature | HumanGPT | Walter Writes AI |
|---|---|---|
| Platforms | iPhone app (iOS 17 or later). A web editor is planned but not live yet. | Web, iPhone (iOS 17.0 or later), Android, a Chrome extension, APIs and MCP.1264 |
| Free plan | Yes 1 free demo rewrite, then 300 words a day, up to 300 words per rewrite. | Partly A one-time 300-word trial (Simple level) that doesn't renew.7 Its mobile page mentions a free app tier.2 |
| Paid pricing | Pro: $5.99 a week with a 3-day free trial, or $39.99 a year (US prices).18 | Starter $12, Pro $23, Elite $47 or Teams $139 a month, or $96, $156, $312 or $1,188 a year.5 |
| Word limits | Free: 300 words a day. Pro: 50,000 words a week (fair use), up to 3,000 words per rewrite. | 30,000, 70,000 or 200,000 words a month, at 750, 1,500 or 2,000 words per request.5 |
| Rewriting approach | Anthropic Claude models guided by the open-source humanizer skill (26 patterns from Wikipedia's "Signs of AI writing"). Tones, strength, text types; voice matching and sentence rewrite on Pro. | Readability level, purpose and a "Detection Bypass Level" (Simple; Standard and Enhanced on paid plans).38 |
| AI-likeness or detection | Yes Built-in AI-likeness estimate with per-sentence highlights. An estimate, not proof of authorship. | Yes AI-likelihood score, with likely AI parts highlighted when the result is AI. Scans use no word credits.1910 |
| Facts and citations kept | Yes Integrity check for facts, numbers and citations, plus a fact-check pass when needed. | No Its help center says Walter is "not a grammar checker, plagiarism checker, fact checker, or editor".11 |
| Document import and export | Import .txt, photos and scans (on-device OCR), Google Docs and web links; PDF and Word on Pro. Export .txt, .docx, .pdf. | Yes Its humanizer page mentions file upload and download, with no formats listed.12 Google Docs via the extension.4 |
| Languages | App in English, German, Spanish and French. | Its help center lists 30 input languages, detected automatically, and an interface in 8.13 |
| Privacy and data retention | Processed in the EU (Firebase europe-west1) and by Replicate (Anthropic Claude) only to produce results. Server copies of results kept 30 days; uploads deleted after extraction. No ads.19 | Personal data kept "as long as necessary". We found no statement on model training. Says it "may work with third-party advertising partners to show you ads". Hosted in the US.1415 |
| Notable claims | Doesn't promise undetectable text or a pass on any detector or exam. | Its humanizer page says "Bypass All AI Detectors" and claims a 12% average Turnitin score.12 Its Terms don't promise content will "always avoid detection".15 We haven't tested these claims. |
- Yes listed by the provider
- Partly some of it, or only on some plans
- No the provider says it isn't offered
- Not stated not in the sources we checked
Where Walter Writes AI is stronger
Pick Walter Writes AI if you need any of these.
-
It goes where you write
Walter Writes AI runs on the web, iPhone and Android, and its Chrome extension works inside Gmail, Google Docs, LinkedIn, Notion, Slack, ChatGPT and Claude, with drafts synced.24 HumanGPT is iPhone-only for now; its web editor isn't live yet.
-
Teams, APIs and monthly billing
Teams gives up to 10 members 500,000 shared words a month, and monthly billing starts at $12.51 APIs start at $49 a month, and the MCP server is free.1
-
More settings and languages
You get five readability levels, such as High School or Doctorate, and 10 purposes, such as Essay or Legal.1617 The interface comes in 8 languages; HumanGPT's in 4.13
Where HumanGPT is different
Based on Walter Writes AI's own pages.
-
Facts and citations get checked
Every rewrite gets an integrity check for facts, numbers and citations, plus a fact-check pass when your text has numbers, names or citations.
-
Free words every day
After 1 free demo rewrite, you get 300 free words a day. Walter's trial is 300 words once and "doesn't renew".7
-
No ads and a fixed retention period
Text is processed in the EU and by Replicate (Anthropic Claude) only to produce your result. Server copies of results are deleted after 30 days, uploads after extraction. No ads. See the privacy policy.
How the rewriting differs
HumanGPT uses Anthropic Claude models guided by the open-source humanizer skill, which covers 26 patterns from Wikipedia's "Signs of AI writing".2021 You pick a tone, strength and text type; Pro can match your own voice.
Walter Writes AI asks for a readability level, a purpose and a "Detection Bypass Level", which, per its help center, "controls how aggressively Walter rewrites your text to avoid AI detection tools". It warns that Enhanced "May sound less natural or introduce minor grammar issues".8 Humanize & Scan then checks the result with Walter's own detector, and its help center advises: "Always review your output. Walter rewrites for detection, not for meaning. Make sure it still says what you meant to say."3
Example rewrite
Tone: professionalThe Lisbon campaign is live. In its first week it reached a 4.1% click-through rate and 1,250 sign-ups.
Fixed
- Chatbot phrases
- Staged run-up
- Sales language
Kept
- 4.1%
- 1,250 sign-ups
Sample text and rewrite written for this page to show typical edits. Results depend on your text and settings. We don't show Walter Writes AI output, because a single sample can't fairly represent another tool.
Pricing compared
Walter Writes AI bills monthly or yearly, on the web and in its app.56
HumanGPT
- Free
- $01 free demo rewrite, then 300 words a day, up to 300 per rewrite
- Pro weekly
- $5.99 / week3-day free trial. 50,000 words a week (fair use), up to 3,000 per rewrite
- Pro yearly
- $39.99 / yearSame Pro limits
US prices.18
Walter Writes AI
- Free trial
- $0300 words once, Simple level only
- Starter
- $12 / monthor $96 a year. 30,000 words a month, 750 per request
- Pro
- $23 / monthor $156 a year. 70,000 words a month, 1,500 per request
- Elite
- $47 / monthor $312 a year. 200,000 words a month, 2,000 per request
From Walter's pricing page and help center.57 Teams is $139 a month.
Prices in US dollars as listed in October 2026, before tax. Prices vary by country, and either provider can change them at any time.
Questions about HumanGPT and Walter Writes AI
Is HumanGPT an alternative to Walter Writes AI?
It can be, if you write on an iPhone and want your facts kept intact. If you need a browser, Android, a Chrome extension or a team plan today, Walter Writes AI may suit you better, because HumanGPT is iPhone-only for now.
Can HumanGPT promise my text won't be flagged as AI?
No. No tool can promise how a detector, a teacher or an editor will judge a text, and HumanGPT doesn't try to. It rewrites your draft so it reads naturally and shows an AI-likeness estimate, which is an estimate and not a verdict. Follow the rules of your school or workplace.
Is Walter Writes AI free?
Walter offers a one-time trial of 300 humanizer words on its Simple level, which its help center says doesn't renew. Its mobile page also mentions a free tier in the app. HumanGPT gives you 1 free demo rewrite, then 300 words every day.
How much does Walter Writes AI cost compared with HumanGPT?
Walter's Starter, Pro and Elite web plans cost $12, $23 or $47 a month, or $96, $156 or $312 a year. HumanGPT Pro costs $5.99 a week with a 3-day free trial or $39.99 a year in the US.
Sources
All sources were last checked in October 2026.
- Walter Writes AI home page (opens in a new tab)
- Walter Writes AI mobile apps (opens in a new tab)
- Help center: Getting started with the Walter Writes AI humanizer (opens in a new tab)
- Walter Writes AI Chrome extension (opens in a new tab)
- Walter Writes AI pricing (opens in a new tab)
- Walter Writes: AI Humanizer on the App Store (opens in a new tab)
- Help center: How do I use the free trial on Walter Writes AI? (opens in a new tab)
- Help center: What are Bypass Levels in Walter? (opens in a new tab)
- Help center: Can I see which parts of my document were flagged as AI-generated? (opens in a new tab)
- Help center: Does scanning my content in the AI detector count against my word limit? (opens in a new tab)
- Help center: What does Walter Writes AI do? (opens in a new tab)
- Walter Writes AI humanizer page (opens in a new tab)
- Help center: Which languages does Walter Writes AI support? (opens in a new tab)
- Walter Writes AI privacy policy (last updated September 4, 2025) (opens in a new tab)
- Walter Writes AI terms of service (opens in a new tab)
- Help center: What does Readability Level mean? (opens in a new tab)
- Help center: What does Purpose mean in the humanizer? (opens in a new tab)
- HumanGPT pricing
- HumanGPT privacy policy
- humanizer, an open-source skill by Siqi Chen (MIT License) (opens in a new tab)
- Wikipedia: Signs of AI writing (opens in a new tab)
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Try HumanGPT on your next draft
Paste a paragraph, pick a tone and check the AI-likeness estimate. Your first rewrite is free.
For iPhone with iOS 17 or later.