KIKOMONOThe short answer
Three free tools cover most everyday writing: ChatGPT on its Free plan for drafting and outlining, Claude on its Free plan for longer pieces and revision, and Grammarly on its Free plan for spelling, grammar and tone checks. Pick one general assistant for drafting. Use the proofreading tool at the end of every piece. Pay for nothing until a free limit blocks real work more than once in a week.
AI writes the first draft faster, but you still verify every fact and make the final calls. An unverified draft is a starting point, not a finished piece.
Three verified free options
Each entry below states what the provider’s own page showed on 2026-10-16. Limits and prices change; confirm on the linked page before you rely on them.
1. ChatGPT Free: the drafting assistant
OpenAI’s pricing page lists a Free plan with unlimited text chats with GPT-6, subject to abuse guardrails, plus limited messages with uploads, limited image creation, limited voice chats, limited deep research, limited memory and context, limited Codex access, and limited ChatGPT Work access on desktop. Official pricing page.
Use it for: brainstorming angles, drafting paragraphs, summarizing notes into an outline, rewriting a sentence five ways. Plain text drafting is where the free tier is strongest; uploads and image features carry the tighter limits.
2. Claude Free: the long-form reviser
Anthropic’s pricing page lists a Free plan at $0: chat on web, desktop and mobile, web search, file creation, code execution, memory across conversations, app connectors, Artifacts, Claude Design, Slides and Docs, and up to 5 projects. Usage limits reset on a rolling five-hour session window, and Anthropic states there is no fixed message count: how much you can do depends on conversation length, model choice and features used. Official pricing page.
Use it for: revising a long draft section by section, asking for a critique of your own structure, working with an uploaded manuscript or document. When the five-hour window runs out, wait for the reset or switch to your other assistant.
3. Grammarly Free: the proofreader
Grammarly’s plans page lists a Free plan at $0 per month covering writing without spelling and grammar mistakes, seeing your writing tone, and generating text with 100 AI prompts per month according to the plan comparison table. The paid Pro plan is listed at $12 per month with unlimited personalized suggestions and 2,000 AI prompts per month. Official plans page.
Use it for: the final pass on every piece — spelling, grammar, tone, consistency. Count your AI prompts: at 100 per month, free generation is a seasoning, not the main meal.
Match one tool to each writing job
Do not collect tools. Assign each job to one tool and learn its limits on real work.
- Outlining: one general assistant. Ask for an outline with one question each section must answer, then check the outline before any drafting.
- First draft: the same assistant, one section at a time. Long requests produce vague output; short, specific requests do not.
- Revision: ask the second assistant to critique your draft’s structure, then make the edits yourself. Keep a changelog of what you changed and why.
- Proofreading: Grammarly Free at the end, with its spelling, grammar and tone checks. It catches what your eyes skip after reading the draft ten times.
- Facts and quotes: verify outside the assistant. Ask for sources first, open every cited page and check cited evidence before using an AI answer. A fluent sentence is not a true sentence.
Five checks before you rely on any “free” writing tool
- Free plan or free trial? A free plan stays free with limits. A trial ends and may start charging. Read the plan page, not the advertisement. Grammarly’s Pro card offers a trial with an email reminder two days before it ends and “$0 payment today” — check whether it converts to the paid plan and cancel in time if you do not want it.
- What is the countable limit? ChatGPT Free keeps text chat unlimited but limits uploads, images and voice. Grammarly Free counts AI prompts: 100 per month. Know your number before the deadline week.
- What happens at the limit? Claude’s window resets every five hours. A proofreader with a monthly prompt quota simply stops generating. Plan around the reset rule, not around hope.
- What are you pasting? Do not paste unpublished manuscripts, client documents, or anyone’s private correspondence into a free tier without reading the provider’s data terms. Once uploaded, you cannot fully control where it goes.
- Who owns the final text? Read the provider’s terms on output ownership and on disclosure of AI assistance, especially for client or publication work. Some publishers and clients require disclosure or restrict AI use.
A one-week trial plan
Days 1–2: pick one drafting assistant and finish two real pieces of writing: one email or post, one longer page. Days 3–4: revise the longer page with the second assistant, asking for structure critique first and line edits second. Day 5: run Grammarly Free over both pieces and count how many real errors you had missed. Day 6: deliberately test a limit — spend your Grammarly AI prompts, upload a long document to an assistant, note what stops first. Day 7: decide. If the free tiers carried the week, stay free. If a limit blocked real work twice, compare the paid tier on the official page before spending.
If you hit a limit mid-draft, save your progress before access stops and resume with your backup assistant or after the reset window.
Questions writers ask
Can free AI tools write a whole article for me?
They can produce the words, but the result is generic until you add reporting, experience and judgment. Use free tools for outlines, drafts and proofreading; the ideas, facts and final voice stay yours.
Which free tool is best for grammar checking?
Grammarly Free is the dedicated proofreader of the three: spelling, grammar and tone on a free plan, with 100 AI prompts a month. The two general assistants also catch errors, but proofreading is not their job and they miss things a dedicated checker flags.
Will the free tiers be enough for daily writing?
For ordinary daily volume, usually yes: unlimited text chat on ChatGPT Free and a rolling five-hour window on Claude Free cover a lot of drafting. The first wall most writers hit is a counted quota — Grammarly’s 100 monthly AI prompts, or an upload limit mid-project.
Do I need to disclose AI use in my writing?
It depends on the venue: publishers, clients and courses have their own rules, and some require disclosure. Ask before submitting, and check the provider’s terms on output use for commercial work.