| Walter Writes AI | Grammarly AI Humanizer | |
|---|---|---|
| Starting price | $9/mo | $12/mo |
| Free tier | 200 words | 0 words |
| Bundled detector | No | No |
| Founded | 2023 | 2024 |
| Best for | Users who process the same type of document repeatedly and want predictable results every time. | Professionals who want more natural-sounding AI-assisted drafts without a dedicated bypass-focused tool. |
Price: Walter Writes AI is cheaper to start, at $9/mo vs $12/mo.
Walter Writes AI: Plans from roughly $9/mo depending on monthly word allowance.
Grammarly AI Humanizer: Included in Grammarly Premium ($12/mo annual) and Business plans.
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
Walter Writes AI: Cited in multiple 2026 comparisons as one of the more reliable mid-tier tools against GPTZero.
Grammarly AI Humanizer: Grammarly is explicit that the feature is meant to improve natural tone rather than guarantee detector evasion, which sets it apart from bypass-first competitors.
AI detector included: Neither tool bundles a built-in detector — pair either with GPTZero or Originality.ai.
Strengths at a glance
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
Grammarly AI Humanizer
- Built into an app most professionals already have installed (browser, desktop, Docs)
- Focuses on clarity and flow rather than aggressive detection evasion
- Backed by Grammarly's long-standing grammar and tone engine
Our verdict
Choose Walter Writes AI if: users who process the same type of document repeatedly and want predictable results every time. Choose Grammarly AI Humanizer if: professionals who want more natural-sounding ai-assisted drafts without a dedicated bypass-focused tool.
Full Walter Writes AI review → · Full Grammarly AI Humanizer review →