AI writing tools all promise to "write better, faster". In practice they are built for different jobs, and the one that suits a marketer drafting ad copy is rarely the best pick for a novelist or a developer writing documentation. This guide gives you a way to narrow the field quickly instead of trialling a dozen tools that all look the same.

Start with the job, not the tool

Before looking at any product, write down the single most common writing task you need help with. The most useful categories are:

• Long-form drafting — blog posts, articles, reports. You want strong structure and the ability to hold a consistent tone across thousands of words.

• Short-form generation — ads, social posts, subject lines. You want speed and variety, often dozens of variations at once.

• Editing and rewriting — tightening your own text, changing tone, fixing grammar. You want a tool that respects your voice rather than replacing it.

• Research and summarising — condensing sources and pulling out key points.

Most tools are strong in one or two of these and mediocre in the rest. Decide which matters most and judge everything else against that.

Check the free tier honestly

A free plan is only useful if it survives real work. Look for three numbers on the pricing page:

1. Word or generation limits. Some tools count words, others count requests. A "generous" 10,000-word monthly cap disappears in two long articles.

2. Model access. Free tiers often run a smaller, older model than the paid plan, so output quality on free may not represent the tool at all.

3. Output restrictions. Watermarks, locked exports, or a ban on commercial use can make a free plan useless for client work.

If a tool's free plan does not let you complete one real task end to end, treat it as a paid tool with a demo, not a free tool.

Test with one of your own documents

Generic prompts flatter every tool. Paste in a paragraph you actually wrote and ask for a rewrite in a specific tone. Then ask the tool to continue from your text. How well it matches your voice and how gracefully it handles your domain's jargon tells you more in five minutes than a week of demos.

Weigh the workflow, not just the output

• Where does it live? A browser tool is fine for occasional use; an extension or editor plugin saves real time if you write all day.

• Does it keep context? Tools that remember your tone, audience, and previous sections produce far more consistent long-form drafts.

• Can you export cleanly? Copy-pasting from a chat window into a CMS loses formatting. Native Markdown or rich-text export matters more than it sounds.

A quick decision checklist

• I know my primary task and picked a tool that is strong at it.

• I verified the free tier can complete at least one real task.

• I tested it with my own writing, not a stock prompt.

• I confirmed it fits my existing editing workflow.

• I checked the licence allows my intended use (including commercial, if relevant).

If a tool passes all five, it is worth a subscription. If it fails on the first two, no amount of clever features will make up for it.