In short: ChatGPT and Claude are the strongest general-purpose writers, and worth trying both since pricing is nearly identical. Notion AI is the better fit if your team already lives in Notion for documents. Jasper suits marketing teams producing on-brand copy at volume. Grammarly Business is the right tool if the job is polishing existing writing, not generating it from scratch.
How we compared these
We looked at what each tool is actually built for, general drafting, in-app document writing, brand-consistent marketing copy, or polishing existing text, rather than treating them as five interchangeable chatbots. Pricing is confirmed at each vendor's published rate at time of writing; always check current pricing before committing, since plans and rates change.
AI Writing Tools Compared (USD/month)
| ChatGPT Plus | Claude Pro | Notion AI | Jasper | Grammarly Business | |
|---|---|---|---|---|---|
| Best for | General business writing, brainstorming, quick drafts | Long documents, contracts, detailed analysis | Teams already writing inside Notion docs and wikis | Marketing teams producing on-brand copy at volume | Polishing and correcting writing already drafted |
| Starting price | $20/month | $20/month | $10/user/month (add-on) | $49/month (Creator tier) | $15/member/month (annual) |
| Works standalone | Yes | Yes | No, requires a Notion plan | Yes | Yes, browser and app extensions |
| Generates from scratch | Yes | Yes | Yes, within documents | Yes, brand-voice templates | No, edits existing text |
Top pick for most businesses: ChatGPT or Claude
For a business without a specific writing bottleneck, general drafting, emails, reports, first-pass marketing copy, ChatGPT and Claude are the strongest starting points, and the honest answer is it's worth trying both, since pricing is nearly identical at $20 a month. ChatGPT has the broader general ecosystem and plugin support. Claude tends to handle long documents and dense text more cleanly in a single pass, which matters if your writing regularly involves contracts, reports, or lengthy briefs rather than short-form copy.
Best for teams already in Notion: Notion AI
If your team already writes and stores documents inside Notion, wikis, project briefs, meeting notes, Notion AI is the more efficient choice, since it drafts and edits directly inside the documents you're already working in rather than requiring a separate copy-paste step. The honest limitation: it's an add-on, not a standalone product, so it only makes sense if you're already paying for or planning to adopt Notion itself.
Best for marketing teams: Jasper
Jasper is built specifically for marketing content at volume, blog posts, ad copy, social captions, with brand-voice templates designed to keep output consistent across a team of writers. It costs meaningfully more than ChatGPT or Claude at $49 a month for a single user, and that premium is only worth it if your business is producing marketing copy regularly enough to need the brand-consistency features, not for occasional writing tasks.
Best for polishing, not generating: Grammarly Business
Grammarly Business solves a different problem to the other four tools here: it doesn't generate writing from scratch, it corrects and improves writing your team has already produced, grammar, tone, clarity, consistency across an organisation. It's the right addition alongside a generative tool, not a replacement for one, and is worth adding once a team is producing enough external-facing writing that consistency across multiple writers becomes a genuine issue.
Pricing and availability note
Confirm current pricing directly with each vendor before committing, published rates and plan structures change, and per-seat pricing for team plans varies by headcount. All five tools here are available globally with no region-locking on sign-up, though data storage location and terms differ by vendor, worth checking directly if your business handles data subject to a specific regulatory framework.
Common mistakes when choosing an AI writing tool
The most common mistake is picking based on general reputation rather than the actual writing task at hand, defaulting to whichever tool is most talked about rather than the one built for the job. A close second is signing up for a specialised tool like Jasper before confirming a general-purpose tool genuinely can't do the job at a third of the price, brand-voice templates and marketing-specific features are only worth paying for once volume justifies them. The third is treating any of these tools as a full replacement for a human review step. Every tool here, including Grammarly Business, still benefits from a person reading the final output before it goes out under your business's name, particularly for anything customer-facing.
Switching tools without losing existing work
If you're moving from one AI writing tool to another, check what happens to any saved templates, brand voice settings, or document history before cancelling the old subscription. Notion AI's output lives inside your existing Notion workspace regardless of the AI add-on status, so cancelling loses the AI features but not the documents themselves. Jasper's brand-voice profiles and saved templates are usually exportable in some form, but confirm this directly with support before committing to a switch, rather than assuming standard export options exist. ChatGPT and Claude conversation history is generally tied to the account and not portable to a competing tool in a structured format, so if a specific past conversation or output matters, save it separately rather than relying on being able to retrieve it later.
Methodology (Real-World, Verified)
We test AI tools against real SMB workflows: the tasks a 20-person business actually uses AI for, not enterprise demos. Pricing is verified at the vendor's published rates, with AUD or other local-currency conversions noted where relevant. Compliance notes reference the legislation and regulatory guidance relevant to each article's region. Tools are assessed for suitability by a business with no dedicated IT department.
Related reading: our can staff upload customer data to AI tools.
Related reading: our Claude AI review for Australian business.
Is it worth paying for both ChatGPT and Claude?
For most businesses, no, pick one and switch only if you consistently hit its limitations. Trying both during a free or low-cost trial period before committing to an annual plan is more useful than running both indefinitely.
Do I need Notion to use Notion AI?
Yes, it's an add-on to an existing Notion plan, not a standalone product. If you're not already using Notion for documents, evaluate Notion itself first before the AI add-on specifically.
Can Grammarly Business replace a generative AI writing tool entirely?
No, it edits and improves existing text rather than generating new content from a prompt. Most businesses use it alongside a generative tool, not instead of one.
Is Jasper worth it for a small business that only writes occasionally?
Usually not, its brand-voice and volume features are built for teams producing marketing content regularly. A business writing occasionally is better served by ChatGPT or Claude at a lower price point.
What happens to my saved work if I cancel an AI writing tool subscription?
This varies by tool. Notion AI's documents remain in your Notion workspace even without the add-on. ChatGPT and Claude conversation history is generally tied to the account and not easily exported. Check the specific vendor's policy before cancelling if past outputs or settings matter to you.
<a href="/tools/ai-tool-selector/">AI Tool Selector</a> to get a personalised AI tool recommendation for your business
Find Your AI Tool