Our pick is Claude. Its drafts need the least editing to sound like a person wrote them. ChatGPT is the better choice if you also want research, images and voice in the same app. Gemini makes sense if you write in Google Docs all day, Grammarly if you only want your own text cleaned up, and Sudowrite if you write fiction.
Updated October 22, 2026. Prices in US dollars. For Canadian prices, see our Canada vs. U.S. price check.
Claude
The most natural writing voice of any AI assistant. Good at long documents and at matching your tone, and the free plan is enough to judge it.
Pros
- Drafts sound the most human
- Edits without losing your style
- Reads long documents and files
Cons
- No image generator
- Free usage runs out faster on long texts
The 6 tools at a glance
| Tool | Best for | Free plan | Paid from |
|---|---|---|---|
| Claude | Long-form writing, editing | Yes | US$20/month (Pro) |
| ChatGPT | A bit of everything, research, brainstorming | Yes | US$8/month (Go) |
| Gemini | Writing inside Google Docs and Gmail | Yes | US$4.99/month (AI Plus) |
| Grammarly | Fixing grammar, clarity and tone in your own text | Yes, 100 AI prompts a month | Paid plans available |
| QuillBot | Paraphrasing and summaries | Yes, 125 words per paraphrase | Paid plans available |
| Sudowrite | Fiction and novels | Free trial | Paid only |
1. Claude: best for writing
Ask Claude and ChatGPT for the same blog intro and the difference is usually obvious: Claude’s version has fewer bullet points, fewer stock phrases and more varied sentences. It also follows style notes well (“short sentences, no jargon, Canadian spelling”) and can rewrite your draft without flattening your voice.
Put your past articles or a style guide in a Project and it will keep using them. The free plan gives you Sonnet 5.5; in our Claude Free test it handled 42 short messages without a limit. See Claude pricing for paid plans.
2. ChatGPT: best if you need more than text
ChatGPT is the tool to pick when writing is only part of the job. It outlines, drafts emails and social posts, researches with web search, makes an image for your post and lets you brainstorm by voice. Paid plans run on GPT-6 Sol, the free plan on GPT-6 Luna. Its first drafts tend to be more structured and list-heavy, so plan to edit more. Head-to-head: ChatGPT vs Claude.
3. Gemini: best inside Google Docs and Gmail
If your documents live in Google Workspace, Gemini drafts and rewrites right inside Docs and Gmail, so nothing gets copied back and forth. AI Plus costs US$4.99 (C$6.99 in the App Store), the cheapest paid writing assistant here.
4. Grammarly: best for polishing your own words
Grammarly isn’t a strong writer from scratch. What it does best is catch typos, unclear sentences and the wrong tone as you type, in the browser, Word, Gmail and Slack. If you already write well and want fewer mistakes, start here.
5. QuillBot: best for rewording
QuillBot rewrites sentences in several modes (fluent, formal, simple, creative) and summarizes long texts. Students use it a lot; check your school’s AI policy first. More in best AI for students.
6. Sudowrite: best for fiction
Sudowrite is built for novelists. It brainstorms plot turns, expands a scene, adds sensory detail and keeps your characters straight in a “story bible”. It’s no use for emails, but nothing else here handles a 300-page manuscript as well.
Which one fits what you write?
| You write… | Use |
|---|---|
| Blog posts, articles, reports | Claude |
| A bit of everything | ChatGPT |
| In Google Docs and Gmail all day | Gemini |
| Emails and documents that must be error-free | Grammarly |
| Essays you need to reword or summarize | QuillBot |
| Novels and short stories | Sudowrite |
| In French | Claude or ChatGPT, then Antidote to proofread |
Get better text out of any AI
- Paste a sample of your own writing and ask it to match the tone.
- Name the reader: “Canadian small-business owners, no jargon”.
- Treat the output as a first draft. Unedited AI text reads as generic, and people notice.
- Check every number, name and quote. These tools still invent things.
- Cut the giveaways: “in today’s world”, “it’s worth noting”, “unlock”, “seamless”. Our AI humanizer test showed a 10-minute manual edit beats any humanizer tool.
FAQ
What is the best free AI for writing?
Claude Free for drafting, ChatGPT Free if you also need images or research, and Grammarly Free for correcting your own text.
Can AI write in Canadian French?
Yes. Claude, ChatGPT and Gemini write good French. Ask for “français québécois” to get local words like courriel and magasiner, then proofread with Antidote.
Can people tell when text is AI-written?
Often, if it isn’t edited. Detectors are unreliable, but readers spot stock phrases and flat rhythm. Edit the draft and add something only you know.