HyperWrite
A writing assistant that learns your personal style, paired with a browser agent that can fill in forms and do research on your behalf rather than just answering in a chat window.
What you'd use it for
Getting a writing assistant that sounds like you, plus a browser agent you can point at a form or a short research task instead of doing it by hand.
- Get sentence-level autocomplete suggestions as you type, across most websites, via TypeAhead
- Generate a full paragraph, email reply, or blog draft from a short prompt
- Hand a short browsing task to the Personal Assistant agent and have it click through and fill in an online form for you
- Pull real-time citations and web research into a draft rather than writing from the model alone
- Save a custom persona so future drafts keep your own tone
The verdict
HyperWrite is worth trying for the Personal Assistant browser agent more than for the writing itself - the style-matching and autocomplete features are solid but not remarkable next to ChatGPT or Claude. It suits someone who specifically wants a writing voice tool with a browser agent thrown in, and the free tier is thin enough that anyone who likes it lands on Premium within a session or two. It does not suit anyone shopping for the strongest general-purpose AI model or the most capable browser agent on the market.
What it costs
| Tier | Price | For | Includes |
|---|---|---|---|
| Premium | $19.99/month, or $16/month billed annually ($192/year) | An individual writer wanting AI assistance day to day. | 250 AI messages/month, citations with real-time information, 3 custom personas, unlimited TypeAhead suggestions. |
| Ultra | $44.99/month, or $29/month billed annually ($348/year) | Power users running heavier or more frequent workflows. | Unlimited AI messages, 10 custom personas, early access to experimental features, unlimited TypeAheads. |
Read from HyperWrite's own pricing page on 25 Sep 2026. Vendors change prices without notice.
What you need to start
- A free HyperWrite account, email signup, no credit card
- The Chrome extension, to use the Personal Assistant browser agent
- A paid Premium or Ultra plan once you exceed the free tier's 10 paragraphs and 10 rewrites a month
A few minutes to a working free account with no card required; the browser agent needs the Chrome extension installed as a separate step before it can act on a page.
Your first run Signing up free takes an email address and no card, and TypeAhead suggestions start appearing as you type in the same session; trying the Personal Assistant agent takes one extra step, installing the Chrome extension, after which you hand it a short task, such as one form, and watch it work over a few minutes.
Where it breaks
Annual pricing is roughly 20% cheaper than paying monthly on both tiers; a promotional code offering 50% off the first month was also live on the pricing page and may not persist.
Browser extension plus a web app. The browser agent (Personal Assistant) can navigate pages and fill forms directly in your browser session rather than in a sandboxed environment.
First entry in this reference. There is no previous check to compare it against.
When not to use it
Not for anyone who wants the most capable underlying model or the most reliable browser agent available - both trail dedicated leaders in their own category. Also not for anyone unwilling to grant a browser extension permission to click and type on pages on their behalf.
HyperWrite, from OthersideAI, splits into two things that get bundled under one name: a writing assistant that adapts to your personal style over time, and a browser-based agent that can act on pages — filling in forms, running research, clicking through a workflow — rather than just producing text for you to copy elsewhere.
That second part is the more distinctive piece. Most writing tools stop at generating a draft; HyperWrite’s agent will go do something with what it finds, which puts it closer to an early browser-automation agent than a pure writing tool, even though writing assistance is still the entry point most people arrive through.
What separates the tiers
The real gap between Premium and Ultra is volume, not capability: 250 messages a month versus unlimited, and 3 custom personas versus 10. If you are testing whether the personalised style actually holds up on your own writing, Premium is enough to find out; move to Ultra once message limits start interrupting a real daily workflow rather than because Ultra unlocks something Premium cannot do at all.
With roughly 368,000 monthly visits reported as of February 2026, HyperWrite sits as a smaller, more specialised alternative to ChatGPT or Claude for someone specifically after a writing style that tracks their own voice, plus the browser-agent capability neither of those ship as a core feature.
Alternatives
Writing & editingAppsJasper
A marketing copy platform with a set brand voice, campaign templates, team approval workflows and, on higher tiers, custom no-code agents.
Writing & editingAppsWordtune
Rewrites a sentence several ways so you can pick the tone you meant, and summarises long pages down to the parts worth reading.
Writing & editingAppsGrammarly
An AI writing assistant that lives inside the apps you already type in, correcting and rewriting as you go rather than waiting for you to paste something into a chat box.
Assistants & chatAppsChatGPT
OpenAI's assistant in a browser tab, a desktop app and a phone app, where you ask questions, draft text, and hand it files or spreadsheets to work through.
Get HyperWrite
Buying the tool is not the hard part.
The ebook is about what to hand over, in what order, and how you find out when it goes wrong. One payment, no subscription.