Alternatives
The best HumanFlow alternatives for non-native English writers
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
The best HumanFlow alternative depends on why you're switching. If you wrote the text yourself and want it to sound natural without changing your meaning, ESL Humanizer is built for that. Grammarly is a good fit if you want real-time grammar help in email, Docs and every browser field; QuillBot is a good fit if you need a summarizer, citation tool and paraphraser in one subscription.
Why people look for a HumanFlow alternative
- Its core use case is AI-generated text
- Sentence mapping requires a paid plan
- Non-native writers want edits aimed at their specific errors
HumanFlow and its alternatives compared
Details come from each tool’s own website in September 2026 and can change. ESL Humanizer is our product, so its row sticks to verifiable facts.
| Tool | Built for | Free option | Paid from |
|---|---|---|---|
| ESL Humanizer | Polishing English you wrote yourself | 1 rewrite a day (2 when signed in), up to 1,500 characters (~250 words) each | $24.95/month or $89 for 4 months |
| Grammarly | Correcting grammar and tone as you write; its humanizer rewrites AI-generated text | Grammar and spelling checks, 100 AI prompts a month, basic free humanizer | Pro from $12/month |
| QuillBot | General paraphrasing, grammar and summarizing | Paraphraser up to 125 words per run | $19.95/month or $8.33/month billed yearly |
| DeepL Write | Refining text for clarity and tone, alongside DeepL's translator | Free version on the web with limits | Write Pro add-on from €6.99/user/month billed yearly, on a paid DeepL plan |
| Undetectable AI | Rewriting AI-generated text | 250-word trial | $5/month billed yearly (10,000 words) |
| HumanFlow (for reference) | Making AI-assisted drafts read naturally; AI-likelihood scoring | 2,000 words a month to humanize, 10,000 to detect, 1,500 words per scan | $18/month (Writer); 40% off yearly |
The alternatives, one by one
1. ESL Humanizer — for English you wrote yourself
ESL Humanizer rewrites a non-native writer’s own paragraph so it reads naturally, then shows every change word by word with a meaning score and an AI-detection estimate. It doesn’t generate content and never promises to beat detectors.
- ESL Humanizer is built for your own writing, not AI drafts — the fix is for non-native phrasing.
- A word-by-word diff and meaning score come free with every rewrite.
- Pages and landing pages in Ukrainian and Uzbek, for applicants writing in English as a second language.
2. Grammarly — correcting grammar and tone as you write; its humanizer rewrites AI-generated text
A grammar and writing assistant that also offers a free AI humanizer for rewriting AI-generated drafts.
- Choose it if you want real-time grammar help in email, Docs and every browser field
- Watch out for: its humanizer is designed for AI-generated text, not for a non-native writer's own draft
- Free option: Grammar and spelling checks, 100 AI prompts a month, basic free humanizer
3. QuillBot — general paraphrasing, grammar and summarizing
A paraphrasing suite with several rewrite modes, a grammar checker, a summarizer and a humanizer.
- Choose it if you need a summarizer, citation tool and paraphraser in one subscription
- Watch out for: the free paraphraser stops at 125 words per run
- Free option: Paraphraser up to 125 words per run
4. DeepL Write — refining text for clarity and tone, alongside DeepL's translator
DeepL's writing assistant, which suggests clearer wording and corrections, from the company behind DeepL Translator.
- Choose it if you translate from your first language and then polish in English
- Watch out for: its Pro features need a paid DeepL subscription
- Free option: Free version on the web with limits
5. Undetectable AI — rewriting AI-generated text
An AI humanizer that rewrites AI-generated text and markets high “human” scores on major detectors.
- Choose it if you're rewriting marketing copy that an AI drafted and detector scores matter to you
- Watch out for: designed around AI-generated input, not a non-native writer's draft
- Free option: 250-word trial
When sticking with HumanFlow makes sense
- You start from an AI draft and want it to read naturally
- You need an API or a lot of AI-detection checks
Wrote it yourself? Make it sound natural.
Paste a paragraph. ESL Humanizer fixes non-native phrasing, keeps your meaning and highlights every change — free for up to ~250 words.
Quick answers
What's the difference between HumanFlow and ESL Humanizer?
HumanFlow mainly rewrites AI-assisted drafts and scores AI likelihood. ESL Humanizer rewrites English you wrote yourself so it reads naturally, and shows every change with a meaning score.