Short answer: October 2026
Walter Writes AI and StealthWriter are both AI humanizers with built-in detectors, but they differ on limits, refunds, data handling and developer access. StealthWriter has a free plan with 10 humanizations a day and 1,000 words per input; Walter has a one-time 300-word trial. StealthWriter allows up to 5,000 words per input on paid plans; Walter allows 750 to 2,000. Walter offers an API and a Chrome extension; StealthWriter says it has neither yet. Neither output was measured here, so there is no verified quality winner.
| Criterion | Walter Writes AI | StealthWriter |
|---|---|---|
| Free access | One-time 300 Humanizer words; detector access for 3 days per help center | Free plan: 10 humanizations and 10 AI scans per day, 1,000 words per input |
| Paid allowance | Monthly word allowance (30,000 on Starter) | Daily humanizations (50 per day on Starter) |
| Words per request | 750 to 2,000 by plan; 50-word minimum | 5,000 on paid plans |
| Entry paid plan (vendor-listed, USD) | Starter: USD 96 billed annually (shown as USD 8 per month) | Starter: USD 20 per month or USD 200 per year |
| Rewrite controls | Readability level, purpose, bypass level (Simple, Standard, Enhanced) | Rewrite levels; Ghost 5.2 Mini on free, Ghost 5.2 Pro and Legacy on paid |
| Refund terms | First-ever subscription only, within 3 days, 1,500 words or fewer used | Within 24 hours of a purchase or renewal, if the account was not used |
| Submitted text | Humanized results are saved as documents in your account | Privacy policy says submitted text is “not stored at all” |
| API and extension | API (billed separately), MCP server, Chrome extension, mobile apps | No public API; browser extension on its roadmap |
| Operator | Walter AI Inc., Montréal (Terms) | AiVantage LLC, Wyoming (Terms) |
| Measured output quality | Not measured here | Not measured here |
Which is better: Walter Writes AI or StealthWriter?
It depends on how much you write and how you work. StealthWriter’s daily allowances and 5,000-word inputs suit long documents processed in one pass; its free plan also renews daily. Walter’s monthly word allowance and per-request caps suit steady volume split into sections, and its API, MCP server and Chrome extension suit people who want the humanizer inside other tools. Neither vendor’s marketing establishes better output. Test the same passage on both and check names, numbers, quotations and qualifications line by line.
How do the free options compare?
StealthWriter’s pricing page lists a free plan with 10 humanizations and 10 AI scans per day, 1,000 words per input and the Ghost 5.2 Mini model only. Walter’s trial article describes a one-time 300-word Humanizer allowance that does not renew, with the Simple bypass level. For ongoing free use, StealthWriter’s published terms are more generous. Our Walter free-trial guide covers Walter’s conditions in detail.
How do paid plans differ?
The two services meter usage differently. Walter’s pricing page sells a monthly word allowance, from 30,000 words on Starter to 500,000 on Teams, with 750 to 2,000 words per request. StealthWriter sells a number of humanizations per day, from 50 on Starter to 2,000 on Scale, each up to 5,000 words. Compare them by your real workload: total words in a month, longest single document, and whether you work every day or in bursts. Check the billing period on each checkout; Walter’s listed monthly figures are for annual billing.
What are the refund and cancellation terms?
Walter’s Terms refund only a first-ever subscription payment requested within three days with no more than 1,500 words used; renewals are final. StealthWriter’s refund policy (last updated March 6, 2026) allows a request within 24 hours of a purchase or a renewal if the account has not been used, and says it cannot refund a forgotten renewal. Both subscriptions renew automatically. See the Walter refund guide and cancellation guide.
How do they handle your text?
Walter’s help center says every humanized result is saved as a document in your account, which you can delete. StealthWriter’s privacy policy (last updated September 5, 2026) says text submitted for humanization or detection is “not stored at all” and not used to train models, although its homepage FAQ says text is not stored “after processing is complete”. Neither claim was tested here. Avoid uploading confidential material to either service until you have read the current policy.
What do the vendors say about detectors and academic use?
StealthWriter’s terms say it “does not guarantee” that output will be scored as human-written and that it “must not be used for academic dishonesty”. Section 26 of Walter’s Terms of Service says Walter “does not support using our technology to circumvent educational AI detection systems when those systems are in place to prevent academic misconduct.” No humanizer can guarantee a detector result, and a detector score does not show whether a text is accurate.
Methodology and evidence limits
This comparison uses only each vendor’s own pages, read on October 15, 2026: Walter’s pricing page, Terms of Service and help articles, and StealthWriter’s homepage, pricing, refund, privacy, terms and FAQ pages. No outputs were generated with either service and no detector was run, so the table has no quality or bypass score. Prices are vendor-listed in US dollars and may change. Walter’s six saved rewrite examples show how Walter handled specific passages; they are not a comparison with StealthWriter. For a wider shortlist, see the humanizer comparison and Walter alternatives.