AI writing tools can draft emails, marketing copy, documentation and reports in seconds. The difference between them is less about raw ability and more about brand control, workflow fit and how they handle your data.
General assistants such as ChatGPT and Claude are often the strongest writers; specialist tools add templates, brand voice and team governance. Our picks cover both.
Our top picks
- 1
Best overallChatGPT8.6Editorial score 8.6 out of 10 - 2
Best for long documentsClaude8.4Editorial score 8.4 out of 10 - 3
Best for editing everywhereGrammarly8.3Editorial score 8.3 out of 10 - 4
Best for brand governanceWriter8.2Editorial score 8.2 out of 10 - 5
Best for marketing teamsJasper7.8Editorial score 7.8 out of 10 - 6
Best budget optionQuillBot7.8Editorial score 7.8 out of 10
Scores are editorial assessments based on research. Prices are indicative.
ChatGPT
ResearchedExcellent all-round writing quality and versatility, with team plans that exclude your data from training by default.
ChatGPT handles drafting, analysis, coding help, image generation, web search and file analysis in one interface. Business plans add a shared workspace, admin controls and data excluded from training by default.
Not for you if: Confidential data on consumer plans.
Pros
- Very broad capabilities
- Strong ecosystem and custom GPTs
- File and data analysis
Cons
- Can produce confident errors
- Usage limits vary by plan
Claude
ResearchedStrong at nuanced long-form writing and working with large documents in a single conversation.
Claude excels at reading long documents, careful writing, reasoning and coding assistance. Team and enterprise plans add shared projects, admin controls and data protections suited to business use.
Not for you if: Teams needing image generation in the same tool.
Pros
- Strong long-context handling
- High-quality writing
- Projects for shared context
Cons
- Usage caps on lower tiers
- Fewer built-in media tools
Grammarly
ResearchedWorks inside the apps you already use, improving clarity and tone across email, docs and chat.
Grammarly checks grammar, clarity and tone across browsers, desktop apps and email, and adds generative AI for drafting and rewriting. Business plans add style guides, brand tones and admin controls.
Not for you if: Long-form content generation.
Pros
- Works in almost every app
- Very easy to use
- Style guides for teams
Cons
- Generative AI limits by plan
- Suggestions can be over-eager
Writer
ResearchedBrand voice, style guides and terminology controls built for marketing and enterprise content teams.
Writer is an enterprise generative AI platform with its own Palmyra models, knowledge graph and strong governance. It enforces style guides and terminology across teams, and lets companies build AI apps on their own data.
Not for you if: Freelancers and tiny teams.
Pros
- Style guide enforcement
- Strong security and compliance
- Knowledge graph on your data
Cons
- Expensive at scale
- Enterprise-focused
Jasper
ResearchedCampaign-oriented templates and brand voice features aimed at marketers producing content at volume.
Jasper targets marketing teams with brand voice settings, campaign workflows, templates and collaboration. Its value lies in consistency across many contributors rather than raw writing ability.
Not for you if: Individual writers on a budget.
Pros
- Brand voice and style guides
- Marketing templates and campaigns
- Team collaboration
Cons
- Pricier than general assistants
- Overlaps with tools you may already have
QuillBot
ResearchedAffordable paraphrasing, summarising and grammar tools for individuals.
QuillBot offers paraphrasing with multiple modes, a grammar checker, summariser, citation generator and AI detector. It is popular with students and non-native English writers, with a low-cost Premium plan.
Not for you if: Brand-voice marketing teams.
Pros
- Very affordable
- Multiple paraphrase modes
- Browser and Word extensions
Cons
- Limited generation features
- Paraphrasing can change meaning
Comparison table
| Tool | Best for | Score | From (indicative) | Free plan |
|---|---|---|---|---|
| ChatGPT | Best overall | 8.6 | Free tier; business plans from around $25–30 / user / month | Yes |
| Claude | Best for long documents | 8.4 | Free tier; team plans from around $25–30 / user / month | Yes |
| Grammarly | Best for editing everywhere | 8.3 | Free plan; paid from around $12–15 / user / month | Yes |
| Writer | Best for brand governance | 8.2 | From around $29 / user / month; Enterprise by quote | No |
| Jasper | Best for marketing teams | 7.8 | From around $40–60 / seat / month | No |
| QuillBot | Best budget option | 7.8 | Free; Premium around $8–10 / month | Yes |
How we chose
- We built a longlist of AI writing tools from vendor documentation, public pricing pages, security and trust pages, and the products small teams most often ask us about.
- Each product was scored against our published, weighted criteria (see the methodology page). The overall score is calculated from those sub-scores — it is never typed in by hand.
- We priced every product at 5, 10 and 25 seats using the publicly listed tiers, and penalised products whose essential features sit behind expensive plans.
- Products marked 'Researched' have been assessed from documentation and public information rather than hands-on testing. Prices are indicative, dated, and should be confirmed with the vendor.
Read our full scoring methodology →
Check how your data is used
Confirm whether prompts and outputs are used for model training, and whether business plans offer opt-outs and data retention controls.
Test on your own content
Run the same three real briefs through each shortlisted tool. Quality differences show up quickly on your own material.
Plan for human review
AI drafts can contain confident errors. Budget time for fact-checking, especially for anything published or sent to customers.
Avoid paying twice
Many suites now bundle AI writing. Check what Microsoft 365, Google Workspace or your CRM already include before adding another subscription.
See every option we rank in AI Writing Tools.
Buying checklist
Before you commit, confirm each of these on the exact plan you will buy:
- Brand voice / style guide support
- Works inside your writing apps
- Team management
- Clear data-usage terms
- Pricing per seat vs usage
Avoid these mistakes: 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.
Frequently asked questions
Is ChatGPT good enough for business writing?
For most small teams, yes. A general assistant handles emails, drafts and summaries well. Specialist tools add value mainly through templates, brand voice and team controls.
Will AI-written content hurt SEO?
Search engines evaluate helpfulness and quality rather than how content was produced. Thin, unedited AI content performs poorly; edited, expert-reviewed content can perform well.
Are AI writing tools safe for confidential information?
Only use business or enterprise plans that contractually exclude your data from training, and follow your own data classification rules.
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