| StealthGPT | Walter Writes AI | |
|---|---|---|
| Starting price | $14.99/mo | $9/mo |
| Free tier | 0 words | 200 words |
| Bundled detector | No | No |
| Founded | 2023 | 2023 |
| Best for | Long-form academic or research writing where sentence-level restructuring matters more than speed. | Users who process the same type of document repeatedly and want predictable results every time. |
Price: Walter Writes AI is cheaper to start, at $9/mo vs $14.99/mo.
StealthGPT: Plans from $14.99/mo; per-word bundles available for one-off use.
Walter Writes AI: Plans from roughly $9/mo depending on monthly word allowance.
Free tier: Walter Writes AI offers a more generous free tier (200 words).
If you just want to test either tool before paying, Walter Writes AI's 200-word allowance gives you more room to evaluate quality.
Detection performance
StealthGPT: Positioned and marketed specifically around Turnitin's originality algorithm rather than general-purpose detectors.
Walter Writes AI: Cited in multiple 2026 comparisons as one of the more reliable mid-tier tools against GPTZero.
AI detector included: Neither tool bundles a built-in detector — pair either with GPTZero or Originality.ai.
Strengths at a glance
StealthGPT
- Generates and rewrites in one pass, so you can skip a separate AI writer
- Aggressive sentence-level restructuring rather than word substitution
- No word cap on paid plans — good for full-length papers
Walter Writes AI
- Reliable, repeatable output across multiple passes on the same document
- Praised in independent tests for maintaining natural sentence flow
- Simple flat pricing without confusing tiers
Our verdict
Choose StealthGPT if: long-form academic or research writing where sentence-level restructuring matters more than speed. Choose Walter Writes AI if: users who process the same type of document repeatedly and want predictable results every time.