Best AI writing tools for copy, fiction, academic papers and marketing

Which AI writing tool should you pick?

Most AI writing tools can produce a paragraph; what separates them is the kind of writing they are built around.

• Rytr if you want a cheap, general writing assistant for emails, posts, product descriptions and rewrites: there is a free plan with 10,000 characters a month, and unlimited characters start at $9 a month.
• Sudowrite if you write fiction: it keeps your characters, outline and style in one project and drafts, describes and revises scenes. Every plan has a free trial without a credit card, and paid plans start at $10 a month billed yearly.
• Paperpal if you write academic papers, theses or coursework: grammar checks tuned to academic style, plagiarism and AI-detection checks, citation lookup and pre-submission checks, inside MS Word, Google Docs and Overleaf. The free plan needs no card.
• Closers Copy if you write sales pages, ads and email sequences for a living: 700+ copywriting frameworks, SEO tools and team seats in every plan, from $49.99 a month with a 14-day money-back guarantee.
• Simplified if writing is one part of a wider marketing job: its AI writer sits next to design, video and a social scheduler in one workspace, from $19 a month billed annually ($29 billed monthly).

How to choose an AI writing tool: what we compared

Facts come from each provider's own pricing, product and terms pages, read in October 2026. More tools in this niche are among the best AI tools.

• What it is built for. A fiction app, an academic editor and a sales-copy platform give very different drafts for the same prompt.
• Price model. Rytr limits characters on the free plan only, Sudowrite counts credits, Paperpal caps edits and checks per month, Closers Copy counts AI runs on its entry plan, and Simplified counts generative AI credits, with a monthly allowance per plan. The table quotes the cheapest paid plan with its billing period.
• Free plan or trial. Whether you can test the tool on your own text before paying.
• Where you write. A browser extension or a Word or Google Docs add-in saves copying text back and forth.
• Refunds and cancellation. How much you risk if the tool doesn't suit you.

Rytr: a low-cost writing assistant with a free plan

Rytr's writing tool, Create, offers 40 use cases from emails to ads, 22 tones or your own voice, and can generate up to three drafts at once. A browser extension brings it into any text box. Rytr also includes Engage, a contact-tracking assistant you can ignore if you only need writing.

On the Rytr pricing page, Free costs $0 with 10,000 characters a month and 30+ languages. Lite is $9 a month with unlimited characters, Personal $19 and Pro $49; the higher plans mainly raise the Engage limits, and Pro adds custom use cases. Yearly billing saves 20%. Signing up through our link gives a 20% discount on a paid plan.

Pick Rytr if you need short copy, emails and rewrites in different tones and want unlimited output for the lowest price here. The downside: it is a generalist with no long-form manuscript, academic or SEO tooling, and its terms say subscriptions are non-refundable except at the company's discretion, so test on the free plan first. More in our Rytr review.

Sudowrite: AI writing for novelists

Sudowrite is an AI writing app for fiction, founded by writers Amit Gupta and James Yu. Story Bible takes a novel from idea to outline, chapters and drafted text in your style. Write suggests the next 300 words from your characters, tone and plot; Describe, Expand and Rewrite revise scenes; and Feedback points out five areas to improve. It includes Muse, a model built for fiction, and 1,000+ plugins.

The Sudowrite pricing page lists Hobby & Student at $10 a month with 225,000 credits, Professional at $22 with 1,000,000 credits (marked as double the former 450,000) and Max at $44 with 2,000,000 credits that roll over for 12 months. These are per-month prices with yearly billing, advertised at up to 50% off; billed monthly, the three plans cost $19, $29 and $59. Every plan has a free trial with no credit card, and the "EZ Cancel Guarantee" lets you pause or cancel from your subscription page.

Pick Sudowrite if you are writing a novel, stories or a screenplay and want tools that think in scenes and characters. The downside: it is a poor fit for business or academic writing, heavy drafting can use up the monthly credits, and the trial length and refund terms are not stated on the pricing page. See our Sudowrite review.

Paperpal: AI writing help for academic research

Paperpal, run by Cactus Communications (the group behind Editage), is built for papers, theses and coursework. It checks grammar with academic-style language and tone suggestions, runs plagiarism checks against 99B+ sources and AI detection, paraphrases and trims text, and offers research Q&A over 250M+ articles with citation lookup in thousands of styles. It adds 30+ pre-submission and journal-fit checks. It works as an MS Word add-in, in Google Docs and Overleaf through Chrome and Edge extensions, and on the web. Paperpal says your files are never used to train AI.

The free plan, with no card, includes 200 grammar edits a month and 5 uses a day of the AI writing and research tools. Prime raises this to 20,000 grammar edits, 10,000 words of plagiarism checks and 500 AI uses a month; Pro makes grammar, AI detection and the writing tools unlimited and adds 30,000 words of plagiarism checks. The Paperpal pricing page shows prices in your local currency, so the amount depends on your country. Promo code PAP20 gives 20% off Paperpal plans.

Pick Paperpal if you write in English for journals, a thesis or coursework and want academic phrasing, citations and pre-submission checks in Word or Overleaf. The downside: the free plan is tight, and refunds are only available within 30 days of a first annual purchase or 7 days of a first monthly one. Details in our Paperpal review.

Closers Copy: frameworks for sales copy

Closers Copy is a browser-based copywriting platform run by Nico Engler in Germany. You start from 700+ copywriting frameworks and its own models: SalesAI for sales and marketing copy, BlogAI for articles and StoryAI for story-driven copy. Workflows, a Longform editor and SEO Audit and Planner are in every plan. The AI supports 128 languages.

According to the Closers Copy site, Power costs $49.99 a month with 300 AI runs, 50 SEO audits and 2 seats; Superpower $79.99 with unlimited AI writing and 3 seats; and Superpower Squad $99.99 with 5 seats. Paying yearly saves 30%. There is no free trial; every plan has a 14-day money-back guarantee instead.

Pick Closers Copy if you write sales pages, ads, emails or SEO articles and want frameworks, team seats and SEO tools in one subscription. The downside: it is the most expensive entry point here, the Power plan is capped at 300 AI runs, and refund requests after 14 days are not processed. Read our Closers Copy review.

Simplified: AI writing inside a marketing workspace

Simplified is an AI marketing platform. Its AI writer drafts long-form articles in your brand's voice, with internal links and sources, and the same workspace creates designs, ad variants and short video clips and schedules posts across your social channels. A Brand Kit keeps outputs on brand.

The Simplified pricing page shows a Monthly/Yearly toggle and separate tabs for businesses and agencies. For businesses, Pro is $19 a month billed annually ($29 billed monthly) with 1 seat, 7 social accounts and 10K generative AI credits, and Business is $49 ($79 monthly) with 3 seats, 15 social accounts and 30K credits; for agencies, Growth is $149 ($199 monthly) and Enterprise is priced on request. Pro and Business come with a 7-day trial. A block further down the same page still quotes a campaign-based Starter plan at $79 a month, so check the plan at checkout. You can cancel at any time with no fee. If you also need slides, our guide to the best AI presentation makers covers Simplified's deck tool.

Pick Simplified if you publish posts, ads and emails for a brand or clients and want one tool to write, design and schedule them. The downside: it is expensive if you only need text, there is no free plan on the pricing page, AI credits are capped on each plan, and no refund policy is stated there. See our Simplified review.

Rytr alternatives: when to switch

Rytr is a sensible first tool: free to start and unlimited from $9 a month. Switch when your writing becomes specialised: Sudowrite for a book, Paperpal for journals or university work, Closers Copy for copy that has to sell, Simplified if you also need visuals and posting. General tools such as ChatGPT, Jasper, Grammarly and QuillBot are also options; compare their current plans on their own sites.

Good habits with any AI writing tool

Treat every AI draft as a first draft: check facts, names and numbers, follow your institution's rules on AI for academic work, and read the privacy terms before uploading a manuscript.