We Tested the 10 Best AI Writing Software for Authors, Marketers & More

Sudowrite Team, a small team of writers and book lovers devoted to helping anyone who wants to tell their story.

AI writing software isn’t exactly new.

The idea of using AI and ML to generate text has been floating around since the '60s (shoutout to ELIZA). And the modern era of AI writing tools has been in full swing since the release of GPT-3 aaaall the way back in 2020.

That said, the field is constantly evolving. New AI writing tools are constantly being released, and established ones are constantly improving (or failing to keep pace). So, we thought we’d provide a curated list to help you figure out which AI writing software is worth your time.

From creative writing tools like Sudowrite to AI-powered proofreaders like ProWritingAid, there’s something here for everyone.

What Is AI Writing Software?

Don’t worry… we’ll keep this short!

AI writing software is a category of tools, platforms, and services united by a shared goal—to help you write better and/or faster (usually and). Now, this is a pretty broad definition. That means you’ll find all kinds of different AI writing software designed with different purposes in mind.

A few (like Sudowrite) are geared toward creative writing, while others focus on professional writing. Some are designed to generate text, while others are designed for research. And beyond use cases, you’ll find features ranging from AI-enabled grammar checking to brainstorming (and beyond).

10 Best AI Writing Software Solutions on the Market

  1. Sudowrite: Best for creative writing.
  2. Jasper: Best for content marketing.
  3. Rytr: Best for versatility on a budget.
  4. NovelAI: Best for roleplay and fanfiction.
  5. ProWritingAid: Best for editing and proofreading.
  6. Frase: Best for SEO research.
  7. ChatGPT: Best for brainstorming and ideation.
  8. Copy.ai: Best for copywriting.
  9. Wordtune: Best for rephrasing.
  10. Shortwave: Best for writing emails.

1. Sudowrite

Best for Creative Writing

Sudowrite is an all-in-one creative writing partner for authors, writers, and creators.

Most AI writing software is designed to help you win customers with blog content and draft error-free emails. Sudowrite is designed to help you build vivid, living worlds, brainstorm mind-bending plot twists, and create compelling characters that jump off the page—all while sounding like you, not a robot.

AI is central to Sudowrite—but it's not in the driver’s seat. From best-in-class style matching to advanced feedback tools, we build AI tools that empower writers, not replace them.

Key Features

  • Quick Chat: Quick Chat is designed to be flexible, fast, and oh-so-easy. Just use a keyboard shortcut and start chatting with an AI who’s studied everything about your story—plot points, scenes, characters, items, etc. Get suggestions, summaries, recaps, explanations, and ask specific questions about your book… like, “What could happen if my main character made a different choice?”
  • Quick Edit: Want to edit without losing momentum? Pull up Quick Edit with a keyboard shortcut and explain what you want to change or adjust—for example, “Make this front door seem more friendly and inviting.” Sudowrite will take care of it without skipping a beat.
  • Story Bible: This is where you store (or get AI help creating) all the core details about your story—from the outline and characters to nitty-gritty details like magic systems, timelines, and more. Sudowrite's AI will keep track of everything and pull in key details when generating text.
  • Match My Style: Upload a sample of your writing and Sudowrite will learn to sound just like you! This, along with the rest of Story Bible, allows our powerful Chapter Generator to whip up a first draft of an entire chapter in your voice in no time!
  • Brainstorm: We all hate writer’s block. Our Brainstorm tools help you skip straight to the fun parts of writing by offering limitless suggestions for characters, dialogues, plot twists, and settings.
  • Rewrite: When the right words just won’t come, AI can help. Highlight some text, explain what you want to change (e.g., “add more tension here”), and Sudowrite’s AI will generate a few revised versions for you to choose from.
  • Describe: Vivid descriptions pull readers out of their heads and into your world. But writing descriptions isn’t everyone’s cup of tea. Our Describe tool generates rich, immersive descriptions for all five senses with the click of a button.
  • Plugins: Sudowrite’s fans are a pretty talented bunch. The authors, writers, and creators who use Sudowrite have created thousands of plugins for all kinds of cool, niche features—from killing cliches to generating plot twists to talking to your characters. Browse this massive plugin library and add (almost) any features and tools you need.

Pricing

We’ve tried to make our pricing affordable, transparent, and flexible for all types of writers. We offer three paid plans (with up to a 50% discount if you opt for annual billing):

  • Hobby & Student ($10/month): 225,000 credits per month
  • Professional ($22/month): 1,000,000 credits per month
  • Max ($44/month): 2,000,000 credits per month
  • Enterprise (custom)

We also offer a risk-free, no-card-required, free trial that lets you test out all our tools and features.

Pros and Cons

Pros:

  • Personalized AI writing that sounds like you
  • Supportive community (and thousands of community plugins)
  • Wide range of writing, editing, and feedback tools
  • Free writing classes multiple times a week taught by authors
  • Clean, simple UI that lets you focus on writing
  • Uncensored, so it’s okay if your story has violence or NSFW subject matter
  • Access to over a dozen AI models with unique characteristics
  • Designed for creative writing

Cons:

  • No free plan
  • Not catered to non-fiction writers (yet!!)

2. Jasper AI

Best for Content Marketing

Jasper is an all-in-one content marketing suite with templates for generating just about any marketing or sales asset you can think of (and dynamic templates for everything else). A brand voice feature helps Jasper sound a bit more like you and a built-in knowledge base helps the AI write about your business without hallucinating important info.

Key Features

  • Dynamic Templates: Tell Jasper what you want to write, and it creates a workflow that progressively fleshes out a draft.
  • Brand Voice: Upload text or have Jasper scan your website to develop a custom tone that sounds pretty close to yours.
  • Chat & Art: Access handy extras like image generation for things like blog headers and chat for research.

Pricing

  • Creator ($39/seat/month): 1 user seat
  • Pro $59/seat/month): 3 brand voices
  • Business (custom): Unlimited feature usage

Jasper AI offers a 7-day free trial on their “Creator” and “Pro” plans. You’ll save 20% if you opt for yearly billing.

Pros and Cons

Pros

  • Great long-form editor
  • Versatile writing styles
  • Nice extras (knowledge base, image generation, chat, etc.)

Cons

  • Relatively expensive
  • Plagiarism detection costs extra

3. Rytr

Best for Versatility on a Budget

Rytr is very similar to Jasper.

It’s (also) an all-in-one content marketing suite designed for sales and marketing copy. Under the hood, you’ll find templates, a style emulation feature, AI editing and adjusting tools, and so on. Why include it here? It’s a great option if you’re looking for Jasper’s versatility without the hefty price tag.

Key Features

  • Tone Match: Write content that sounds more like you by letting the AI analyze your writing habits,
  • Copywriting Formulas: Uses formulas like AIDA and PAS to generate persuasive, high-converting content.
  • Plagiarism Checker: Integrate with Copyscape to make sure your content is 100% original and plagiarism-free.

Pricing

  • Free: 10k characters/mo
  • Unlimited ($7.50/mo): Unlimited generations
  • Premium ($24.16/mo): Multiple-tone matches

Rytr gives you two months free when you pay annually.

Pros and Cons

Pros:

  • Decent tone and voice matching
  • Chrome extension works almost everywhere
  • Wide range of features

Cons:

  • Limited free tier
  • Occasional low-quality outputs

4. NovelAI

Best for Roleplay and Fanfiction

NovelAI is an AI storytelling platform that really surged in popularity a few years back. It’s part roleplay partner, part long-form story generator. The UI is great, and the features are simple enough for any roleplay or waifu enthusiast to pick up in minutes.

Key Features

  • Lorebook: Store all the details about your story in one place, including characters, locations, objects, religions, factions, and more.
  • Multiple Modes: Roleplay to your heart’s content with Text Adventure mode or write longer-form stories with Storyteller mode.
  • Image Generation: See your characters, settings, scenes, and more with built-in image generation.

Pricing

NovelAI has a free trial that gives you 100 text generations.

Beyond that, there are three paid plans:

  • Tablet ($10/month): 3,072 tokens of memory (approximately 12,288 characters)
  • Scroll ($15/month): 6,144 tokens of memory (approximately 24,576 characters)
  • Opus ($25/month): 8,192 tokens of memory (approximately 32,768 characters)

Pros and Cons

Pros:

  • Proprietary AI models are trained for prose
  • The editor and UI are very customizable
  • AI output and model settings are very customizable

Cons:

  • Setup can take a while
  • You’re a bit limited in terms of what you can do with AI

5. ProWritingAid

Best for Editing and Proofreading

ProWritingAid is diving head-first into the AI writing revolution. The tool has always been great for catching errors. Now (thanks to AI), it’s great for stylistic suggestions, too. It offers features for expanding and shrinking sentences, adjusting your tone, and more.

Key Features

  • Grammar Checker: Catch grammar and spelling errors with a high degree of accuracy and correct them all with a few clicks.
  • Writing Enhancing: Use AI to rephrase passages, add counterarguments, critique your work, and more.
  • Extensions and Add-Ons: Work pretty much anywhere—Google Docs, Word, Notion, Chrome, etc.

Pricing

  • Free: 500 words max, 3 daily AI generations
  • Premium ($10/month): Unlimited words, 5 daily AI generations
  • Premium Pro ($12/month): 50 daily AI generations, 3 daily document critiques

Pros and Cons

Pros:

  • Produces pretty comprehensive writing style reports
  • Great Chrome extension and web app
  • AI supports a wide range of writing styles (from business writing to narrative prose)

Cons:

  • Performance issues with long documents are common
  • AI suggestions are occasionally incorrect

6. Frase

Best for SEO Research

Frase isn’t the best AI writer out there (it’s not even close).

Why did we include it? Because it’s amazing for SEO research and content optimization. You can use Frase to analyze SERPs for key details, incorporate these into detailed briefs, and write optimized articles with real-time suggestions.

Key Features

  • Research: Analyze SERPs to pull out key details like common headings, word counts, keyword usage, and more.
  • Outline: Use AI to quickly generate heading structures that will rank based on Frase’s research tools.
  • Write: Use Frase’s editor to write optimized content with real-time suggestions or generate text with AI.

Pricing

Frase offers a free trial that lets one user research one query.

There are also three paid plans:

  • Solo ($15/month):  1 user, 10 queries per month
  • Basic ($45/month): 1 user, 30 queries per month
  • Team ($115/month): 3 users (expandable), unlimited queries

Pros and Cons

Pros:

  • Offers very in-depth (and reliable) research into SERPs
  • The editor is easy to use and real-time suggestions are clear
  • AI tools are helpful in a pinch

Cons:

  • Lacks a built-in keyword research tool
  • AI generations could definitely be better

7. ChatGPT

Best for Brainstorming and Ideation

ChatGPT needs no introduction. Whether you’re brainstorming ideas for your next romance novel or potential counterarguments for an op-ed, ChatGPT is more than up to the task. It’s a great all-rounder with tons of powerful writing use cases… but not full-on book writing (yet).

Key Features

  • Fresh Perspectives: Analyze problems, arguments, and questions from a wide range of perspectives.
  • Efficient Generations: Generate tons of ideas in seconds thanks to ChatGPT’s insanely quick contextual understanding and text generation.
  • Follow-Ups: Ask follow-ups to dive further down interesting rabbit holes or clarify any confusing points.

Pricing

ChatGPT has a great free plan that gives you unlimited access to GPT-3.5 and limited access to advanced models (like GPT-4o).

There are also three paid plans:

  • Plus ($20/mo): Access to GPT-4, GPT4o, GPT-3.5 models
  • Team ($25/mo/user): Create and share ChatGPT within a workspace
  • Enterprise (custom): Expanded context window for longer inputs

Pros and Cons

Pros:

  • Ideal for generating lots of ideas quickly
  • The free plan offers a ton of value
  • Very versatile—can help you visualize a character or write a white paper

Cons:

  • Limited access to advanced models on the free plan
  • Generated text almost always sounds like ChatGPT (not you)
  • Still frequently presents inaccurate info as fact

8. Copy.ai

Best for Copywriting

Copy.ai is (as the name suggests) best for generating high-quality copy. You can use it for everything from product descriptions and ad copy to landing pages and case studies, thanks to a great selection of templates.

Key Features

  • Templates: Access tons of GTM-focused templates for website copy, content marketing, and more.
  • Workflows: Automate complex sales and marketing processes (e.g., scrape LinkedIn profile → pull out details → generate prospecting email).
  • Integrations: Integrate with tools like Salesforce and Zapier to streamline your sales and marketing workflows.

Pricing

  • Free: 1 seat, 2,000 words in chat, ChatGPT 3.5 & Claude 3
  • Starter ($36/month): 1 seat, unlimited words in chat, latest LLMs
  • Advanced ($186/month): 5 seats, 2,000 workflow credits, 15+ marketing workflows
  • Enterprise (custom): Guided implementation, API access, integrations

Pros and Cons

Pros:

  • Offers tons of advanced features beyond AI writing
  • Integrates with lots of Sales and marketing tools
  • Has a wide range of templates for quick asset creation

Cons:

  • Users report occasional performance issues
  • More complex than most AI writing software

9. Wordtune

Best for Rewriting and Rephrasing

Wordtune is a well-rounded AI writing tool that really excels at rewriting and rephrasing. You can use it to quickly adjust your tone, sound more formal or casual, shorten a sentence… or just improve your writing in general.

Key Features

  • Rewrite: Improve your writing with pre-set options for rewriting, formality, and length.
  • Spices: Add distinct elements like analogies, conclusions, and comparisons to your writing with a click.
  • Flexible Support: Use Wordtune across the web via extensions and in apps like Slack and Google Docs through add-ons.

Pricing

  • Free: 10 daily rewrites, 3 monthly summaries, grammar & spelling corrections
  • Advanced ($6.99/month): 30 daily rewrites, 15 monthly summaries, AI suggestions
  • Ultimate ($9.99/month): Unlimited everything plus vocab  enhancements and priority support

Pros and Cons

Pros:

  • Integrates well with Google Docs and Microsoft Word
  • Offers a nice selection of presets (e.g., expand, add a metaphor, etc.)
  • More affordable than many AI-enabled grammar checkers

Cons:

  • Grammar and spelling suggestions are occasionally incorrect

10. Shortwave

Best for Writing Emails

Last up—Shortwave.

This is an AI-powered email tool that is (in our opinion) the best example of what next-gen email looks like. You can use it to quickly draft responses, but also chat with your inbox, create lists of action items from email threads, and more.

Key Features

  • Write: Draft on-brand responses in one click or use AI to autocomplete your thoughts when you get stuck.
  • Search: Search your inbox conversationally to find details and attachments, make lists, and track action items.
  • Summarize: Condense lengthy emails into 1-2 sentence summaries that tell you whether a full read is needed.

Pricing

  • Free: AI assistant, instant summaries and replies, 90-day search history
  • Personal ($7/user/month): Full email search history, 1-year AI-powered search
  • Pro ($14/user/month): Google Workspace accounts, 3-year AI-powered search
  • Business ($24/user/month): 5-year AI-powered search, customizable writing prompts

There’s also a customizable enterprise plan.

Pros and Cons

Pros:

  • Email chat is much more efficient than manual searching
  • The tone of voice customization feature is pretty effective
  • Offers a decent free plan

Cons:

  • If you want to add a Google Workspace account, you’ll need to spring for Pro or higher

Final Thoughts

AI writing software is changing the game for authors, marketers, sales teams, bloggers, students… anyone who writes and wishes they could write faster, better, and with less effort. Just make sure you choose a tool that’s designed for the things you want to use it for—there’s a lot of variation.

Looking for a tool that’s purpose-built for creative writing? Sudowrite is the best option. Our AI models are trained to write lively, engaging prose that sounds like you. Plus, we have all kinds of extra features that help you build vivid, living worlds, generate characters that feel like they were meant to be a part of them, and conquer writer’s block.

But don’t take our word for it… try Sudowrite for free and see for yourself!