⚡ Veredito rápido:
- Preços: Grammarly has a free version and a Pro plan at $12 USD. CoWriter starts at $11.99/month with no free tier.
- Ideal para: CoWriter suits long-form drafting and academic work. Grammarly suits editing, proofreading and spelling grammar checks.
- Principal diferença: CoWriter writes new written content from scratch. Grammarly fixes and sharpens what you already wrote.
- Nossa escolha: Grammarly, because the free version alone covers spelling and grammar for most people.
These two tools sit at opposite ends of the writing process.
CoWriter helps you create a first draft when the page is blank.
Grammarly waits until words exist, then cleans them up.
That one difference decides which tool fits your work.
Here is how each one performs on price, features and daily use.
Visão geral
This Cowriter vs Grammarly comparison covers pricing, features and ease of use.
We reviewed documentation, pricing pages and user reviews for both tools.
Nossos redatores também passaram um tempo interagindo pessoalmente com cada um deles.
Essas observações aparecem nas seções "O que nossa equipe notou" abaixo.
By the end you will know which tool fits your writing.
O que é CoWriter?
CoWriter is an AI writing assistente built for long-form work.
It gives you article ideas, outlines and full drafts.
The outlines it builds resemble long-form SEO articles.
That makes it a fit for marketers and pequenas empresas proprietários.
Students also use it for research papers and academic drafts.
Watch the walkthrough before you judge the writing toolkit.
Co-roteirista
Built for writers facing tight deadlines. Turns a rough topic into an outline in a few clicks.
Preços para Coautores
CoWriter runs two paid plans. There is no permanent free tier.
| Plano | Preço | Ideal para |
|---|---|---|
| Pró | US$ 11,99/mês | Basic editing tool with 50 completion suggestions per day |
| Premium | US$ 23,99/mês | All Pro features plus VIP treatment and unlimited completion suggestions |
Preços verificados em julho de 2026.
Teste grátis: Yes. A limited trial lets you test idea generation and outlines before you pay.
Garantia de reembolso: Not published. Cancel from your account page before the next billing date.
📌 Observação: Premium adds cedo access to new features and lifts the daily cap on suggestions. Pro caps you at 50 per day.
⚠️ Pricing conflict flagged: Our CSV lists CoWriter as “Premium: $385, Pro: $20.00”. The 2026 rates published by CoWriter are $23.99 and $11.99 per month. We show the 2026 rates above and are flagging the gap rather than quietly picking one.
Key Benefits of CoWriter
Here is what makes CoWriter worth a look:
- Speeds up drafting: It supplies article ideas, outlines and word suggestions. That shortens the gap between topic and first page.
- Long-form focus: The outline builder targets long articles, not short social posts. Structure comes before prose.
- Citation generator: An IEEE citation generator handles academic formatting. Useful for engineering and science papers.
- AI detection tools: A built-in AI detection check flags passages that read as ai generated. You still need human review.
- Style controls: Custom writing styles and tones adjust how each draft sounds. You can push it formal or casual.
- Idea generation: The idea tool helps unstick ideas when you struggle to start. Good for tight deadlines.
The benefits block below breaks the same ground visually.
O que nossa equipe observou
Nosso escritor signed up for CoWriter and used it on real blog drafts. Here is what stood out from that hands-on time:
CoWriter Pros & Cons
✅ Prós
- Outline builder shapes long articles fast
- Idea generation helps beat the blank page
- IEEE citation generator supports academic writing
- Custom styles and tones per project
❌ Contras
- Output is detectable as AI generated, so human editing is required
- No free version, only a limited trial
- Pro caps you at 50 completion suggestions per day
O que é o Grammarly?
Grammarly is a writing assistant that checks spelling and grammar as you type.
It works as a 24/7 digital tutor rather than a plain spell checker.
The grammar checker catches subject-verb agreement and misplaced modifiers.
It also flags every misspelled word and each wordy sentence.
Beyond errors, it reads your writing style and audience.
Tone suggestions then help you land the right tone in any message.
The video below shows the editor in normal daily use.
🏆 Vencedor: Grammarly
Real-time feedback inside the apps you already use. The free version covers spelling grammar checks with no word cap.
Preços do Grammarly
Grammarly offers three tiers. The paid tier is the premium version most people mean by Grammarly Premium.
| Plano | Preço | Ideal para |
|---|---|---|
| Livre | US$ 0 | Spelling and grammar checks with no word limit |
| Pró | US$ 12 | Tone rewrites, vocabulary help and plagiarism detection |
| Empresa | Contate o departamento de vendas. | A team or company account with shared style rules |
Preços verificados em julho de 2026.
Teste grátis: The free version never expires. You can test the premium features before a premium subscription.
Garantia de reembolso: Refund terms sit inside the account billing page. Cancel any time from that same screen.
📌 Observação: The free tier gives unlimited word counts for grammar spelling checks. Many rival tools cap that at a few thousand words.
⚠️ Aviso: Plagiarism detection sits behind the paid plan only. Check your own work there before you submit written work anywhere.
Principais benefícios do Grammarly
Here is what Grammarly Premium helps you achieve:
- Feedback em tempo real: Fixes appear as you type, so you focus on content instead of basic errors. That keeps your flow intact.
- Funciona em qualquer lugar: A browser extension plus desktop apps put it inside Google Docs, Microsoft Word and Slack. No copy and paste needed.
- Learn as you edit: Each suggestion carries a short note explaining the rule. You learn from mistakes instead of just accepting them.
- Clarity and voz: It trims unnecessary words and swaps passive voice for active voice. The result reads like polished writing.
- Context awareness: Artificial intelligence tells commonly confused words apart using the surrounding context. It knows which “their” you meant.
- Mobile reach: The Grammarly mobile app and Grammarly keyboard cover typing on your phone in multiple languages, including Spanish, French, German, Portuguese and Italian.
The benefits panel below groups the same premium features by job.
O que nossa equipe observou
Our writer ran Grammarly across email, documents and web forms for several days. Here is what stood out:
Prós e contras do Grammarly
✅ Prós
- Free version has no word limit on grammar checks
- Works inside other apps without copy and paste
- Explains each suggestion so you learn the rule
- Plagiarism checker scans against billions of web pages
❌ Contras
- Suggestions can be aggressive, such as adding unnecessary commas
- Less useful for creative writing than for non-fiction
- It supplements writing skill rather than replacing an editor
Comparação de recursos
We compared ten areas that matter in daily use. The table gives you the short version first.
| Recurso | Co-roteirista | Grammarly |
|---|---|---|
| Preço inicial | US$ 11,99/mês | $0 (Grátis) |
| Versão gratuita | ❌ | ✅ |
| Corretor gramatical | ❌ | ✅ |
| Full Draft Generation | ✅ | ✅ |
| Sugestões de tom | ✅ | ✅ |
| Gerador de citações | ✅ | ✅ |
| Verificador de plágio | ❌ | ✅ |
| Detecção por IA | ✅ | ✅ |
| Extensão do navegador | ❌ | ✅ |
| Ideal para | Long-form drafting | Editing and proofreading |
1. Drafting Long-Form Content
Coautor(a): This is the core job. You give it a topic and it returns a research paper draft or article body. The output arrives fast, which suits tight deadlines.
Grammarly: Generativo ferramentas de IA sit inside the editor and can draft or expand a passage. Drafting is a side job here, not the main event.
2. Grammar, Spelling and Proofreading
Coautor(a): There is no dedicated grammar checker. Text arrives clean because AI wrote it, but you get no line-level proofreading pass on your own writing.
Grammarly: This is the strongest area. It catches every misspelled word, flags complex grammar issues and explains the fix so you learn the rule.
Proofreading runs as a separate pass once the grammar spelling sweep finishes.
⚠️ Aviso: Grammarly can be aggressive with commas. Read each suggestion instead of clicking accept on everything, and ignore the ones that hurt your voice.
3. Tone Suggestions and Writing Style
Coautor(a): You pick a style and tone before generation starts. It is a setting applied up front rather than live feedback on a finished sentence.
Grammarly: Tone suggestions read what you already wrote and compare it to your intended audience. It then proposes edits that shift the message warmer or firmer.
4. Citations and Research Support
Coautor(a): The IEEE citation generator targets engineering and science papers. That is a narrow but genuinely useful niche for academic work.
Grammarly: Its citation generator covers the common academic formats. A separate citation finder tracks down the source behind a quote in your document.
The finder tool handles the research side of the same problem.
5. Detecção de plágio
Coautor(a): There is no plagiarism checker. The indetectável essay writer rewrites phrasing, which is a different job from checking source overlap.
Grammarly: Plagiarism detection ships with the paid plan and scans against billions of web pages. Students and content teams lean on it before publishing.
6. AI Detection and Humanizing
Coautor(a): An AI detection check runs on drafts before you publish. Its own output is still detectable as ai generated, so human review stays part of the process.
Grammarly: Uma IA detector scores a passage, and a separate humanizer rewrites stiff machine phrasing. The two tools work as a pair.
The humanizer handles the rewrite once the detector flags a section.
7. Outlines and Structure
Coautor(a): The outline builder is the standout feature. It maps headings for a long article in a few clicks, which helps writers structure written content before drafting.
Grammarly: There is no outline builder. Snippets let a team save reusable blocks of text, which is closer to templating than structuring a story.
8. Idea Generation and Rewriting
Coautor(a): Idea generation exists to unstick ideas when you stare at a blank page. It feeds angles and subtopics rather than polishing a sentence.
Grammarly: The paraphrasing tool rewrites a sentence you already own. It also lifts vocabulary and trims filler words for clarity.
9. Scripts and Free Extras
Coautor(a): An AI script generator covers video and podcast formats. That widens the tool beyond blog posts and academic papers.
Grammarly: A free essay and paper checker sits outside the paid plan. Students use it for a quick pass before submitting academic work.
A free word counter handles length limits on the same page.
10. Platform Reach and Integrations
Coautor(a): It runs as a web app. You draft in the browser and paste finished text into your editor, which adds a step to the writing experience.
Grammarly: The browser extension, desktop app, Grammarly mobile app and Grammarly keyboard cover most places you type. It is the most reliable option for working inside Google Docs and Microsoft Word without copy-pasting.
📌 Observação: Grammarly publishes user trust guidelines covering how your text is handled. Release notes list new features and bug fixes so you can see what changed.
11. Preços e Custos
Here are the plans side by side.
| Nível do Plano | Co-roteirista | Grammarly |
|---|---|---|
| Livre | ❌ Apenas para teste | US$ 0 |
| Entrada paga | Pro: $11.99/month | Pro: $12 USD |
| Nível superior | Premium: $23.99/month | Empresa: Contate o departamento de vendas |
| Número de planos | 2 | 3 |
Coautor(a): Entry pricing is a few cents under Grammarly, but you must pay to use it at all. Premium at $23.99 buys unlimited completion suggestions and early access to new features.
Grammarly: The free version does real work, so the paid tier is a choice rather than a gate. Enterprise pricing is quoted per team.
💡 Dica profissional: Run Grammarly free for two weeks first. If the only thing you miss is plagiarism detection, the $12 upgrade is an easy call.
Diferentes cenários
| Se você precisar | Escolher | Por que |
|---|---|---|
| Zero budget | Grammarly | Free version with no word cap |
| First drafts written for you | Co-roteirista | Outline builder and full drafts |
| Correct spelling and grammar | Grammarly | Dedicated grammar checker |
| IEEE academic citations | Co-roteirista | Format-specific citation generator |
| Writing help on your phone | Grammarly | Mobile app and keyboard |
| Configuração fácil para iniciantes | Grammarly | Install once, works everywhere |
💰 Seu orçamento
Grammarly costs nothing to start and stays useful at that price. CoWriter asks for $11.99 before you write a single letter.
🔌 Seu conjunto de tecnologias
If your work lives in Google Docs, Slack and email, Grammarly meets you there. CoWriter expects you to come to its web app.
📝 Seu estilo de escrita
Writers who value creativity and their own voice may find generated drafts flat. Grammarly leaves your sentences yours and only nudges them.
🎓 Seu nível de experiência
New writers learn faster with a tool that explains each correction. Grammarly gives that; CoWriter simply hands you finished stuff.
🆓 Testes e demonstrações grátis
Test both on one real project, for example a client article. That single test tells you more than any review.
🛟 Opções de suporte
Grammarly has helpful docs used around the world and an active community. CoWriter support runs through email from your account.
Guia de Troca
Already paying for one of them? Here is what changes if you move.
🔄 Switching from CoWriter to Grammarly?
✅ O que você vai ganhar:
- A real grammar checker with explanations
- A free version you can fall back on
- Support for multiple languages on mobile
❌ O que você perderá:
- The outline builder for long articles
- IEEE-specific citation formatting
- The AI script generator
📋 Como mudar:
- Copy your saved drafts out of CoWriter
- Crie uma conta gratuita no Grammarly.
- Install the browser extension and paste your work in
🔄 Switching from Grammarly to CoWriter?
✅ O que você vai ganhar:
- Full first drafts instead of edits
- An outline builder for long-form work
- Idea generation when you are stuck
❌ O que você perderá:
- Live spelling and grammar feedback in every app
- O verificador de plágio
- Mobile typing help on your phone
📋 Como mudar:
- Export documents from the Grammarly editor
- Start a CoWriter trial and pick a plan
- Rebuild your house style inside custom tones
O que nossa avaliação não abordou
This comparison focused on solo writers, students and small content teams. We did not test enterprise rollouts, shared style guides across large teams, or either tool’s API. Our notes reflect the July 2026 versions of both products. If you manage fifty seats, your priorities will differ from what we covered here.
Veredicto final
| Categoria | Ganhador |
|---|---|
| 💰 Preços | Grammarly |
| ✍️ Draft Generation | Co-roteirista |
| 🔤 Grammar and Spelling | Grammarly |
| 🎭 Tone and Style Control | Grammarly |
| 📚 Academic Citations | Co-roteirista |
| 🔍 Detecção de plágio | Grammarly |
| 🔌 Alcance da plataforma | Grammarly |
| 🏆 Vencedor Geral | Grammarly |
🏆 VENCEDOR: GRAMMARLY
Grammarly wins 5 out of 7 categories.
Ideal para: daily editing, estudante essays, business email, and anyone who wants mistake free text without paying first.
These are two different products aimed at two different moments. CoWriter is an ai powered drafting engine for people facing a deadline and an empty document.
Grammarly is an editing layer that sits on top of whatever you already wrote. Its ai assistance improves clarity, fixes errors and keeps your own voice intact.
CoWriter earns its place if you publish long articles weekly and need structure fast. The outline builder alone saves real hours.
For everyone else, Grammarly is the better first purchase. We hope this makes the choice simpler: pick CoWriter to produce words, and Grammarly to turn words into great writing.
More of CoWriter Compared
Here is how CoWriter measures up against nearby options:
Co-roteirista vs. Jenni
CoWriter wins on: IEEE citation formatting, script generation for video, and per-project tone presets
Jenni vence em: in-line autocomplete while you type, a usable free daily word allowance, and a larger source library
Co-roteirista vs. Writesonic
CoWriter wins on: academic paper output, simpler two-plan pricing, and outline depth for long posts
Writesonic vence em: short-form ad copy templates, bulk generation, and built-in publishing workflows
Co-roteirista vs. Paperpal
CoWriter wins on: generating drafts from scratch, idea prompts, and broader content formats beyond research
Paperpal vence em: journal submission checks, a Microsoft Word add-in, and language editing built for non-native authors
Mais comparações do Grammarly
Here is how Grammarly holds up against other writing software:
Grammarly vs QuillBot
O Grammarly se destaca em: app coverage without copy-pasting, explanations attached to each fix, and mobile keyboard support
QuillBot vence em: paraphrasing modes, a cheaper paid tier, and a summarizer for long source documents
O Grammarly se destaca em: everyday negócios writing, a free tier with no word cap, and browser-wide availability
Paperpal vence em: subject-specific academic phrasing, manuscript readiness reports, and journal formatting rules
Grammarly vs Sider
O Grammarly se destaca em: depth of grammar correction, tone analysis, and plagiarism scanning
Sider vence em: chatting with any web page, switching between several AI models, and summarizing videos
Perguntas frequentes
É co-autor ou co-escritor?
The AI drafting tool at cowriter.ai is written as one word. A hyphenated “co-writer” usually means a human collaborator or a separate classroom accessibility app.
O que faz o Cowriter?
It generates article ideas, outlines and full drafts. Extra features include an IEEE citation generator, an AI script generator and custom style controls.
O Cowriter AI é gratuito?
No. There is a limited trial, then paid plans only. Pro costs $11.99 per month and Premium costs $23.99 per month.
A IA de coautoria é boa?
It is strong for outlines and long-form first drafts. Output reads as machine written, so plan on editing every draft before you publish it.
Existe alguma ferramenta de escrita com IA totalmente gratuita?
Grammarly’s free version is the closest. It covers unlimited grammar and spelling checks, though drafting and plagiarism detection need the paid plan.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 