The best AI writing assistants in 2026
Nine assistants, A to Z, sorted by the kind of writing each was actually built around — because a tool for novels and a tool for campaigns are not competitors.
'Writing assistant' covers four different products that happen to share a category name. There are marketing platforms priced per seat for a team (Jasper, Copy.ai), tools built around a manuscript (Sudowrite), workspace assistants that know your documents (Notion AI), and general assistants that will do any of it if you ask properly (ChatGPT, Claude).
Choosing between them is mostly choosing which of those four you are. The list is alphabetical, and each entry says which kind of writing it was made for and roughly what a day of using it costs.
The list below is in alphabetical order, not ranked. aiCat is one of the tools in it, so any ranking we published would be worth what you would expect — instead, every entry says plainly which situation it is the right answer for, and which it is not.
What was actually compared
- Whether it works inside the application you already write in
- How many actions from a sentence you dislike to one you can send
- Whether it can sound like you rather than like an assistant
- Languages beyond English
- Price against how many times a week you would actually open it
All 9, A to Z
| Tool | Price from | What it is | Languages | Strongest at |
|---|---|---|---|---|
| aiCat | Free · Premium from $6/mo | Every app, OS-wide | Any language the model speaks | One key that proof-reads, translates, explains, detects, dictates and reads aloud |
| ChatGPT | Free · Plus from $20/mo | Chat assistant | Multilingual | General reasoning that is still at or near the top of the field; Long, open-ended sessions where the task changes as you go |
| Claude | Free · Pro from ~$17/mo | Chat assistant | Multilingual | Long-form writing that keeps a consistent voice; Following detailed instructions about tone and structure |
| Copy.ai | Free · from ~$49/mo | Marketing writing platform | Multilingual | Go-to-market workflows rather than single pieces of copy; Templates for ads, emails and landing pages |
| Grammarly | Free · Pro from ~$12/mo | Writing assistant | English-first | Deep grammar, spelling and clarity checking in English; A browser extension plus Office, Google Docs and desktop surfaces |
| Jasper | From ~$39/seat/mo | Marketing writing platform | Multilingual | Brand voice: it can be taught how your company sounds and hold it; Campaign workflows, templates and multi-asset generation |
| Notion AI | From ~$10/member/mo on top of Notion | Workspace assistant | Multilingual | Writing and editing inside Notion pages, where it is genuinely good; Answering questions about your own workspace, with the sources linked |
| Sudowrite | From ~$19/mo | Fiction writing tool | English-first | Built by and for novelists, which shows in every feature; Describe, Brainstorm and Expand tools aimed at prose, not copy |
| Wordtune | Free (limited) · from ~$7/mo | Rewriting assistant | English-first | Rewrite suggestions offered as a list you pick from; Casual/formal and shorten/expand controls that are easy to reason about |
The list, A to Z
aiCat
For the assistant that is where the writing already is
Why: It continues the reply you started, in your register, in the application you started it in — and the same keys dictate the messy first version. Free to start, Premium from $6/month.
Watch out: A download rather than a tab, no brand-voice training, and no workspace context of its own beyond the memory you give it.
Download for free →ChatGPT
For writing that begins as thinking
Why: When you do not yet know what the piece should say, this is the best place on the list to find out, and the ecosystem around it has no rival.
Watch out: $20/month and a window to switch to, which makes it the wrong shape for the thirty short messages around the one real piece.
aiCat vs ChatGPT →Claude
For long pieces that have to keep a voice
Why: Consistently the best of the general assistants at holding tone and instruction across a long document in one pass.
Watch out: A chat window, and its free tier runs out on a working session. Pro from about $17/month.
How aiCat finishes a message in your voice →Copy.ai
For go-to-market work rather than sentences
Why: Workflows and automations that chain several generation steps across ads, emails and landing pages, built for a revenue team.
Watch out: From about $49/month, and entirely the wrong tool for fixing an email.
How aiCat finishes a message in your voice →Grammarly
For writing that has to be correct before it is interesting
Why: The deepest English style engine here, suggestions appearing as you type, and the only enforceable house style on the list.
Watch out: English-first, integration-bound, and it edits rather than drafts. From about $12/month.
aiCat vs Grammarly →Jasper
For a marketing team with a brand to hold
Why: Brand voice training that genuinely works, campaign templates, and team workflows around multi-asset production.
Watch out: From about $39 per seat per month with no free tier. Priced for a department.
How aiCat finishes a message in your voice →Notion AI
For writing that should know what your company decided
Why: Grounded answers from your own pages and databases with citations, which no general assistant can do without being handed the documents.
Watch out: Inside Notion only, on top of a paid Notion seat, from about $10 per member per month.
aiCat vs Notion AI →Sudowrite
For fiction, and unapologetically only fiction
Why: Describe, Expand and Brainstorm are prose tools, and the story bible keeps a novel's continuity straight across a hundred thousand words.
Watch out: Wrong for business writing, English-first, and the manuscript lives in its editor. From about $19/month.
How aiCat finishes a message in your voice →Wordtune
For the sentence you have written and dislike
Why: Several alternatives offered at once with clear register and length controls — the fastest interaction here for one bad sentence.
Watch out: English-first and browser-centred; it will not draft and it will not reach a native application.
How aiCat finishes a message in your voice →Hands-on notes
First-person impressions from using these, not a benchmark. They are here because everything above this point is a table, and a table cannot tell you which tool you will still be opening in three months.
What made this stick was not the writing quality, which is roughly what everything else gives you. It was that the assistant is where the writing is. Onboarding was four minutes and did not make me create anything before it was useful. Then two things: dictation and editing share the same pair of keys, so the messy first version gets spoken and the second one gets fixed without leaving the window, and it retains what I have told it about my work and applies it where it belongs instead of asking again. The cost is the install — this is an application, not a tab — and that is exactly the point if what you want is an assistant on the machine.
The best of the general assistants for anything long where a consistent voice matters. Also a window, which means it is excellent for the piece I sit down to write and irrelevant for the thirty messages around it.
Trialled it while helping a marketing team. The brand-voice training is real and does what it says. It is also priced for a department, and using it to fix an email is like hiring a film crew for a birthday video.
Inside the wiki it answered questions about our own decisions, with links. Nothing a general tool does compares. Outside the wiki — which is where most of the discussion actually happened — it does not exist.
One of them is a hotkey. Try it on the text you have open
Free to start with 10 aiCatCoins, no card. Premium starts from $6/month. macOS, Windows and Linux.
aiCat pricing at a glance
| Plan | Price | aiCatCoins / month | Max selection | What it unlocks |
|---|---|---|---|---|
| Free | $0 | 10 | 500 chars | Everything aiCat does, plus free dictation and your own memory |
| Premium | from $6/mo (list $10) | 3 000 | 5 000 chars | Think More, read-aloud, encrypted memory, premium models |
| Team + Offline | from $18/member | 12 000 | 50 000 chars | Edit your memory, MCP access, local models, team sync |
| Enterprise | from $90/member | 150 000 | Unlimited | SSO, audit, best coin rate |
Shortlist of one? Start with the one that costs nothing to try
aiCat's free tier includes every task, 10 aiCatCoins a month, and coins bought outright never expire. macOS, Windows and Linux.
Frequently asked
Which assistant sounds most like me?
The ones that continue your own sentence rather than writing a fresh one. Starting a reply yourself and having a tool finish it preserves your word choice and sentence length, which is most of what tone is.
Do I need a marketing platform?
Only if you produce campaigns with a team. Jasper's and Copy.ai's value is in brand voice, templates and workflows; for one person writing emails they cost several times what a general tool does.
What is the cheapest assistant that is actually useful daily?
The free tiers of ChatGPT and Claude cover a surprising amount. Below that, usage-based pricing beats subscriptions for anyone opening a tool a few times a week rather than a few times an hour.
Which operating systems does aiCat support?
macOS (Apple Silicon and Intel), Windows 10/11, and Linux as AppImage, .deb or .rpm.
Is my text sent anywhere?
Only the text you explicitly act on is sent to the model you selected, for that one request. Your history is stored locally on your device. Team + Offline can run a local model so nothing leaves the machine at all.