Best overall
ChatGPT Researched
The most widely used AI assistant, with a broad set of tools and integrations.
8.6Editorial score 8.6 out of 10Free tier; business plans from around $25–30 / user / monthIndicativeRead review
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Best AI Writing Tools
Specialist tools for marketing copy, brand voice, grammar and editing.
Read the full buying guide: Best AI Writing Tools for BusinessTL;DR — quick picks
Ranked shortlist
Ranked by overall score, calculated from six weighted criteria for AI tools products. “Best for” labels come from our buying guide.
Best for long documents
Claude Researched
A thoughtful AI assistant known for long documents, nuanced writing and coding.
8.4Editorial score 8.4 out of 10Free tier; team plans from around $25–30 / user / monthIndicativeRead review
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Best for editing everywhere
Grammarly Researched
Writing assistance everywhere you type, from grammar fixes to AI rewrites.
8.3Editorial score 8.3 out of 10Free plan; paid from around $12–15 / user / monthIndicativeRead review
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Best for brand governance
Writer Researched
Enterprise AI writing with brand, style and compliance controls.
8.2Editorial score 8.2 out of 10From around $29 / user / month; Enterprise by quoteIndicativeRead review
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Best for marketing teams
Jasper Researched
An AI content platform for marketing teams, built around brand voice.
Copy.ai Researched
AI writing and go-to-market workflows for sales and marketing teams.
Wordtune Researched
An AI rewriting assistant that suggests clearer ways to say things.
Comparison table
| Tool | Score | Best for | Starting price (indicative) | Free plan | ≈ 10 seats / mo |
|---|---|---|---|---|---|
| ChatGPT | 8.6 | Best overall | Free tier; business plans from around $25–30 / user / month | Yes | $250 |
| Claude | 8.4 | Best for long documents | Free tier; team plans from around $25–30 / user / month | Yes | $250 |
| Grammarly | 8.3 | Best for editing everywhere | Free plan; paid from around $12–15 / user / month | Yes | $120 |
| Writer | 8.2 | Best for brand governance | From around $29 / user / month; Enterprise by quote | No | $290 |
| Jasper | 7.8 | Best for marketing teams | From around $40–60 / seat / month | No | $590 |
| Copy.ai | 7.8 | Marketing teams producing lots of content | Free; paid from around $29–49 / month | Yes | $249 |
| QuillBot | 7.8 | Best budget option | Free; Premium around $8–10 / month | Yes | $83 |
| Wordtune | 7.6 | Everyday email and document polishing | Free; paid from around $7–14 / month | Yes | $70 |
“≈ 10 seats” is the cheapest paid plan that fits ten users at indicative list prices. Flat-priced products show “—”.
Build your own decision matrix
Our ranking uses fixed weights. Your priorities may differ — re-weight the six criteria and the shortlist re-orders instantly. Print it or download a CSV to share with your team.
| Tool | Features | Ease | Value | Support | Security | Integrations | Your score |
|---|---|---|---|---|---|---|---|
| 1. ChatGPT | 9.4 | 9.3 | 8.4 | 7.6 | 7.4 | 8.8 | 8.56 |
| 2. Claude | 8.8 | 9.1 | 8.4 | 7.6 | 8.4 | 7.8 | 8.44 |
| 3. Grammarly | 8.0 | 9.4 | 8.0 | 7.8 | 8.0 | 8.4 | 8.25 |
| 4. Writer | 8.6 | 7.8 | 7.0 | 8.0 | 9.0 | 8.0 | 8.17 |
| 5. Jasper | 8.2 | 8.4 | 7.0 | 7.8 | 7.8 | 7.6 | 7.84 |
| 6. QuillBot | 7.2 | 9.0 | 9.0 | 7.0 | 7.6 | 7.0 | 7.77 |
| 7. Copy.ai | 7.8 | 8.2 | 7.4 | 7.4 | 7.8 | 7.8 | 7.76 |
| 8. Wordtune | 7.0 | 9.0 | 8.0 | 7.0 | 7.8 | 7.0 | 7.61 |
Drag the sliders to match your priorities. Scores are our editorial sub-scores; weights start at the values we publish on the methodology page. Nothing you change is stored or sent anywhere.
Buyer’s guide: choosing an AI writing tool
Specialist vs general assistant
General assistants write well. Specialist tools add brand-voice controls, templates, team style guides and integrations into the apps where writing happens.
Brand consistency
If several people produce content, look for shared style guides and brand voice settings that apply across users.
Originality and review
Always have a human review AI-assisted content for accuracy and tone, especially anything published under your brand.
Use AI for drafts, humans for judgement
AI writing tools are best at first drafts, variations and rewrites. Keep subject-matter knowledge, opinions, facts and final edits with people — that is where quality and trust come from.
Key features to look for
Brand voice
Store your tone, style guide and terminology so output sounds like you.
Templates & workflows
Ready-made flows for blogs, ads, emails and product descriptions.
Editing & rewriting
Grammar, clarity, tone and length adjustments on existing text.
Plagiarism & originality checks
Flag copied passages before publishing.
Team collaboration
Shared workspaces, approvals and usage controls.
How AI writing tool pricing works
| Pricing model | What to know |
|---|---|
| Per user per month | Most business plans charge per seat. |
| Credit or word limits | Some plans cap generations or words; check heavy-use costs. |
| Freemium | Free plans with daily limits, useful for evaluation. |
Run the numbers: AI Tool ROI Calculator
Evaluation checklist
- Brand voice / style guide support
- Works inside your writing apps
- Team management
- Clear data-usage terms
- Pricing per seat vs usage
Common mistakes to avoid
- Publishing AI drafts without human editing and fact-checking.
- Paying for a specialist writing tool when a general assistant would do.
- Not setting up brand voice, so everything sounds generic.
- Ignoring search-quality guidelines on helpful, original content.
- Pasting confidential material into consumer accounts.
AI writing tool comparisons
Frequently asked questions
Will AI-written content hurt my SEO?
Search engines focus on whether content is helpful and original, not how it was produced. Thin, unedited AI content tends to perform poorly; edited content with real expertise can perform well.
Is a general AI assistant enough for writing?
For many teams, yes. Specialist writing tools add brand voice, templates and team workflows that matter more for marketing teams producing lots of content.
Will AI-written content hurt SEO?
Search engines focus on helpfulness and quality rather than how content was produced. Thin, unreviewed AI content performs poorly; edited, expert content can perform well.
Is grammar checking an AI writing tool?
Modern grammar tools use AI for rewriting, tone and generation, so they overlap with this category.