ProWritingAid is an English-only writing assistant from London's Orpheus Technology that pairs a grammar checker with 25+ style and structure reports, sold monthly, yearly or as a one-time licence, with deep manuscript analysis billed separately as Story Credits.
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ProWritingAid is a writing assistant built around a grammar checker and a library of more than twenty-five analysis reports that examine style, structure, readability and rhythm rather than correctness alone. It is not a place you write from scratch so much as a layer you attach to wherever you already write: Microsoft Word on the desktop, Scrivener, Google Docs, or any web page in a supported browser.
This page documents the product as it stands: what the reports actually do, which capabilities are gated behind which plan, what the lifetime licence means in the company's own contract language rather than in its marketing, and where the site's own pages disagree with each other. Because the headline attraction for many buyers is the one-time payment option, the licensing section carries more weight here than it would for a purely subscription product.
The terms of service name the counterparty as Orpheus Technology Ltd, and the site footer carries the same name in its copyright line. Governing law is England and Wales. One clause worth noting early: the terms require any claim or cause of action to be filed within one year of arising, after which it is, in the contract's own word, forever barred. The About page dates the product to London in 2013, names Chris Banks as founder, and states plainly that the company has not taken venture money and remains independent. That last point is unusual enough in this category to be worth recording, though it is a self-description rather than a filing.
There is one useful independent corroboration of who runs this. The Chrome Web Store lists the extension's publisher as Orpheus Technology Limited, matching the contracting entity in the terms, and flags the publisher as having a good record with no history of violations. Where many tools in this space show one name in the legal text and another in the app stores, here the two agree.
The core of the paid product is the report set. ProWritingAid ships more than twenty-five writing analysis reports covering readability, structure, overused words, sentence length variation, sensory detail, pacing, dialogue and consistency, among others. On a paid plan you get unlimited word count and unlimited report runs, where the free tier caps you at 500 words per check and two runs per report per day.
The reports are the product's real differentiator against a plain grammar checker, and also its most common complaint. Turn every report on at once and the volume of suggestions exceeds what any writer can usefully process in a single pass. The practical approach, which experienced users converge on independently, is to enable the handful of reports that address a known weakness in your own drafting and leave the rest off.
Grammar, spelling and punctuation checking is available even on the free tier, alongside a Word Explorer and thesaurus and a document type setting that offers more than forty document types with tailored suggestions. Rephrase rewrites a sentence to be formal or informal, longer or shorter, more fluent, or with added sensory detail. The free plan allows ten Rephrases per day; paid plans make it unlimited.
Sparks is the generative layer: rewrite, enhance, summarize, expand, or continue writing. It is metered by day rather than made unlimited, and the daily allowance is one of the clearest differences between tiers. Free gets three per day, Premium five per day, and Premium Pro fifty per day. If generative assistance is the reason you are buying, that fifty-versus-five gap matters more than any other line on the comparison table.
One feature deserves separate mention because nothing else in the category offers quite the same thing. Author comparison lets you compare your writing to ninety fiction authors across genres. It is a stylistic mirror rather than a corrective, and it aligns with where the product's centre of gravity really sits, which is long-form fiction.
Above the per-document reports sit four deeper analyses aimed at whole books. Chapter Critique gives instant feedback on a short story or a single chapter. Manuscript Analysis gives prioritised developmental feedback on an entire manuscript. Virtual Beta Reader gives a reader's-eye account of how a story will land: where a reader is hooked and where interest fades. Marketability Analysis addresses positioning, target audience and the path to traditional or self-publication, and produces template and promotional documents.
These four are where the pricing gets genuinely complicated, and the details are in the pricing section below. The short version, which is easy to miss on a first read of the plan comparison, is that three of the four are not included in any plan at all.
Paid plans add a custom style guide for your own rules, terminology management via an uploaded term base, Snippets for frequently reused text, in-line citation checking, real-time collaboration with comments, and unlimited document storage. Suggestions can be customised too: you can tell the tool to ignore clichés and diction errors inside dialogue, which matters a great deal for fiction and is the sort of accommodation a general-purpose checker rarely makes.
One capability boundary needs stating plainly because it is disqualifying for some readers. ProWritingAid is currently available in English only. That covers General, British, US, Australian and Canadian English, but no other language. If you need support for a second language, this is the wrong tool and no plan changes that.
Self-editing a novel is the case the product is shaped around. The combination of Scrivener and Vellum desktop integration, dialogue-aware suggestion settings, author comparison across ninety fiction writers, and manuscript-level critique points squarely at book-length fiction.
Line-editing before submission is the narrower and probably strongest use: running structural and style reports on a finished draft to catch repetition, flat sentence rhythm and overused constructions that an author stops seeing in their own work.
Long-form non-fiction and academic drafting is served by readability analysis, terminology management and in-line citation checks, with the caveat about plagiarism checking noted below.
Business and everyday writing works through the browser extensions, though the depth of the report library is more than most business writing needs.
Where it does not fit: anyone writing in a language other than English; anyone who wants a mobile app, since none exists; anyone who wants first-draft assistance, as running twenty-five reports against a draft in progress interrupts exactly the momentum drafting depends on; and anyone whose budget assumes manuscript analysis is included in the subscription, which it is not.
Treat the report library as a diagnostic set, not a checklist. The value is in learning which two or three weaknesses recur in your own writing, then running only those. Writers who report the best experience with this tool describe exactly this narrowing; writers who report frustration almost always describe leaving everything switched on.
Be deliberate about accepting rewrites. When you accept a Rephrase or a Sparks rewrite verbatim, the resulting sentence is machine-generated text, with whatever consequences that carries in contexts where AI-generated prose is scrutinised. Using the suggestion as a signal that a sentence is weak, then fixing it yourself, gets the diagnostic benefit without that exposure.
Run Chapter Critique before spending a credit on Manuscript Analysis. Chapter Critique is included on paid plans, at one per day on Premium and three per day on Premium Pro, and it will tell you cheaply whether the deeper analysis is likely to be worth fifty dollars.
Check whether your institution qualifies for the education programme before paying. K-12 educational organisations can access premium features free, and other students get twenty percent off. The company has stated a goal of providing the assistant free to more than five thousand schools.
Remember that the licence is per individual. You can install it on several computers as the sole user of the account, but other people sharing a machine need their own licences.
A good fit for: novelists and long-form fiction writers who want structural and stylistic feedback rather than grammar correction alone; writers already working in Scrivener, Vellum or desktop Word who want checking inside those environments; anyone who prefers a one-time purchase to an indefinite subscription and has read what that purchase actually guarantees; and students or schools eligible for the education programme.
A poor fit for: anyone writing in a language other than English; anyone who needs a mobile app; anyone who wants plagiarism checking bundled into a subscription; writers who want a small number of high-confidence corrections rather than a large volume of stylistic observations; and anyone whose budget for whole-manuscript analysis has not accounted for Story Credits separately.
ProWritingAid runs as a web application and through five official integrations. Desktop Everywhere for Windows covers desktop Microsoft Word, Scrivener, Vellum and other Windows applications. Desktop Everywhere for Mac covers Word, Scrivener, Notes and other Mac applications. Browser extensions for Chrome, Edge and Firefox cover Google Docs, Atticus, Wattpad and any web page. The Chrome extension reports 4.8 from roughly seven thousand ratings and two hundred thousand users, and carries the store's Featured badge.
There is no official mobile app. No iOS or Android application is published by Orpheus Technology, and the site offers no download link for one anywhere in its footer or integrations page. This needs stating carefully because searching the App Store for the product name returns a same-name trap: an app called Pro Writing Aid - Storivo, published by an individual seller named Ayla YILDIZ, unrelated to Orpheus Technology and carrying its own separate rating from a small sample. It is not this product, and a search of App Store listings by publisher returns no ProWritingAid application at all. Two independent checks agree that mobile is simply not a platform this product ships on.
Prices below were verified directly on the pricing page and are in US dollars. They were also cross-checked against the checkout URLs the page generates, which carry the amounts as parameters, ruling out placeholder rendering.
Premium costs $30 per month billed monthly, $120 per year billed yearly, or $399 as a one-time payment. Premium Pro costs $36 per month billed monthly, $144 per year billed yearly, or $699 as a one-time payment. There is a free tier at no cost.
The free tier gives basic suggestions with a 500-word limit per check, two runs per report per day, ten Rephrases per day, three Sparks per day, grammar and spelling, the thesaurus, document type settings, and the company's privacy commitment. Premium adds unlimited word count, unlimited report runs, unlimited Rephrases, five Sparks per day, the full report library, custom style guides, snippets, terminology management, author comparison, citations, collaboration, unlimited storage, one Chapter Critique per day, and up to forty percent off Story Credits. Premium Pro adds fifty Sparks per day, three Chapter Critiques per day, up to sixty-five percent off Story Credits, live workshops with authors and editors, an on-demand library of more than two hundred expert workshops, and four community features labelled beta: daily cowriting sprints, group critique sessions, writer networking events and guided writing challenges.
On the word "unlimited." Both the free and paid descriptions of unlimited report runs carry an explicit exclusion: they do not cover Chapter Critique, Manuscript Analysis, Plot Analysis, Virtual Beta Reader or Marketability Analysis. Unlimited means unlimited across the standard report library only.
Story Credits are the real cost variable. Manuscript Analysis, Plot Analysis, Virtual Beta Reader and Marketability Analysis each cost one credit to run, and credits are bought separately. List price is $50 per credit, $150 for three and $500 for ten. Premium holders pay $35, $100 and $300; Premium Pro holders pay $25, $70 and $175. So a Premium Pro subscriber running ten manuscript analyses spends $175 on top of the subscription, and a free user doing the same spends $500. Story Credit purchases are non-refundable, with one exception: credits bought alongside a new subscription that is then cancelled inside the three-day window are refunded if unused.
Plagiarism checking is not included in any plan. It is sold as separate check packs: ten checks for $10, one hundred for $40, five hundred for $120, one thousand for $200. This is worth flagging because several third-party summaries state that Premium Pro includes an annual allowance of plagiarism checks. The pricing page lists plagiarism checks under a heading of things to buy in addition to a plan, and the dedicated page sells them by the pack. Where the two conflict, the site's own pages govern.
Refunds are narrow. Refunds are available within three days of purchase, apply only to yearly and lifetime plans, and require an email request. Monthly plans are not refundable at all. Cancelling a subscription does not itself generate a refund. Auto-renew can be switched off at any time from the user profile, and a cancelled subscription remains active until its renewal date.
Education pricing. K-12 educational organisations can access premium features free of charge, and students outside that programme receive twenty percent off.
This deserves its own section, because the one-time payment is the single most cited reason people choose this product over Grammarly, and the contract is considerably more specific than the marketing.
The pricing page's own FAQ says only that lifetime licences are a one-time payment and that once purchased you will not be charged again. That is true and it is not the whole picture. Clause 14 of the terms of service is a dedicated section on the lifetime licence, and it sets out five things.
Clause 14.1 defines a Lifetime License as terminating only on one of three events: the end of your life, Orpheus ceasing to provide the Services in their entirety, or Orpheus ceasing business operations in their entirety. It adds that the licence is granted to you personally, that the rights and obligations do not pass to your heirs, and that Orpheus may ask you to present proof of identification at any time.
Clause 14.2 is the one that changes the meaning. It states that you are entitled to access the agreed Services "for as long as the respective Service(s) is/are offered and supported by Orpheus." The lifetime in question is therefore the service's, not only yours.
Clause 14.3 narrows it further: a Lifetime License applies only to the Services defined in the applicable Order and "shall not extend to any alternative or future services." A licence bought today covers today's product. It does not, by its own terms, entitle the holder to whatever the company launches next.
Clause 14.4 handles updates by pointing to Clause 2.2, and Clause 2.2 grants Orpheus the right to implement new versions and upgrades of paid services, including modifications to design, operational method, technical specifications, systems and other functions, at any time. The buyer's protection against the product changing under them is therefore limited.
Clause 14.5 says neither party may terminate a lifetime order for convenience, with immediate termination for good cause preserved on both sides.
None of this makes the lifetime licence a bad purchase. Read against the alternative it is often still the better arithmetic: $399 against $120 a year pays for itself in a bit over three years, and TechRadar recorded the same $399 lifetime price back in December 2021 while the monthly price has since risen from $20 to $30, which means the one-time price has held while the recurring one has not. What the clauses do is define the risk precisely: you are buying continued access to the current service for as long as that service exists and is supported, not a permanent entitlement to a product line. Anyone weighing $399 or $699 should read Clause 14 before deciding, and should notice that the marketing FAQ mentions none of it.
Grammarly is the direct competitor and the comparison most buyers are actually making. It is generally stronger on real-time correctness and interface polish across everyday writing; ProWritingAid goes deeper on structure, pacing and long-form fiction, and offers the one-time payment that Grammarly does not. Hemingway Editor is far narrower, targeting readability and sentence complexity, and is cheap. LanguageTool covers many languages, which matters given that ProWritingAid is English-only. Scrivener is not a competitor but the environment many of this tool's users write in, and the integration is a genuine reason to prefer ProWritingAid over rivals that do not offer it.
The honest positioning is that ProWritingAid competes on depth of analysis and on licensing model rather than on correction accuracy, where the market leader has an advantage that independent reviewers have consistently noted.
Ratings are good, with the sampling caveats stated. On Trustpilot the service holds 4.3 out of 5 from 700 reviews, distributed 59 percent five-star, 24 percent four-star, 6 percent three-star, 2 percent two-star and 9 percent one-star, with 424 of those arriving in the last twelve months. That is a large and recent sample, adequate to support a quality conclusion. Two qualifications belong alongside it: Trustpilot flags that the company has no recent history of asking for reviews, which reduces solicitation bias but also means the sample is more self-selected than an invited one, and the company has replied to only 9 percent of its negative reviews. The Chrome Web Store's 4.8 from roughly seven thousand ratings is a second, larger and independently sourced sample pointing the same direction.
The negative reviews are not uniform. A recent one-star review titled "AI Slop" from a reviewer who had just switched from Grammarly's free tier sits on the same page as the positive majority. It is recorded here rather than filtered out, because a 4.3 average with 9 percent one-star ratings genuinely contains both experiences.
Independent press coverage is thin and dated. TechRadar reviewed the product in December 2021, concluding that it was real competition for Grammarly but left something to be desired on features and usability by comparison. That is the only first-tier technology publication review located. It is now more than four years old and predates the entire generative AI layer, so it cannot speak to the current product. PCMag's 2026 writing app roundup exists but gives its editorial picks to Final Draft, Scrivener and Ulysses without scoring this product. The English-language content about ProWritingAid is otherwise dominated by writing-community blogs, many carrying affiliate arrangements, which are not treated as evidence here.
Two independent review platforms could not be verified. G2 and Capterra both returned HTTP 403 on direct fetch and again through a headless browser. Their scores are therefore not cited here in any form, including via third-party summaries that quote them.
Aggregator descriptions of this product contain errors. Beyond the plagiarism discrepancy already noted, third-party directory entries were found listing a per-seat Teams plan that does not appear on the current pricing page, and self-assigned scores with no stated sample. These are recorded as discrepancies rather than used as sources.
The site contradicts itself in one place. The Story Credits page's Free plan panel lists "50 Sparks per day" and "3 Critiques per day," which are the Premium Pro allowances. The pricing page gives the free tier three Sparks per day and no Chapter Critique. Both pages are live on the same site; this page reports both rather than reconciling them, and a prospective buyer should confirm free-tier limits in the product itself.
Recurring user complaints are consistent across sources. Slowness and instability with large files, particularly through the Word add-in and browser extensions; a steep initial learning curve caused by the sheer number of reports and settings; and suggestions that are sometimes inaccurate or mutually contradictory, requiring editorial judgement rather than acceptance. These appear too consistently across independent write-ups to omit, though the writing-community sources reporting them frequently carry affiliate links.
The terms include a one-year limitation period on bringing any claim, which is shorter than the statutory period in many jurisdictions.
On training. Clause 4.1 of the terms states that once grammar checking is complete, all submitted texts and their improvements are deleted, and that user texts will not be used to improve the quality of the service. The company says it trains its algorithms on texts hand-corrected by professional copyeditors instead. The Responsible AI page repeats this as an unconditional promise: it will never use your writing to train its algorithms. This is a stronger and more specific commitment than most tools in this category make, and it appears in the contract rather than only in marketing.
On ownership. Clause 4.3 states you retain ownership of all content you post or upload. The Responsible AI page extends this explicitly to AI output: if you use its AI features to change your writing, the company claims no ownership of the result, and you own the rights to that content unless someone else created it previously.
On third-party models. The same page states that some features use large language models developed by leading generative AI providers, that the company believes authors deserve fair compensation when their work contributes to AI systems, and that it is working with companies such as Anthropic toward that end. It also acknowledges directly that unresolved issues remain around how AI models are trained. Disclosing dependence on third-party models and conceding the training-data controversy in the same document is not the industry norm, and it is recorded here as stated.
On storage. The pricing FAQ says text entered into the editor is never kept, that data is encrypted in transit to the servers for processing but not stored on them, and that documents you create in your account are accessible only to you.
There is a genuinely free tier, not a time-limited trial. It includes grammar, spelling and punctuation checking, the Word Explorer and thesaurus, document type settings and the privacy commitment, but caps you at 500 words per check, two runs per report per day, ten Rephrases and three Sparks per day. The unlimited word count and the full report library, which are the reasons most people adopt this tool, are behind a paid plan.
Premium is $30 monthly, $120 yearly, or $399 as a one-time payment. Premium Pro is $36 monthly, $144 yearly, or $699 one-time. Budget separately for Story Credits if you intend to run whole-manuscript analysis, and separately again for plagiarism checks, since neither is included in any subscription.
It is a genuine one-time payment with no further charges, but the contract is narrower than the word suggests. Clause 14.1 says it terminates on your death, or if Orpheus stops providing the services entirely, or if it ceases business entirely. Clause 14.2 entitles you to access for as long as the service is offered and supported by Orpheus. Clause 14.3 says the licence covers only the services in your order and does not extend to alternative or future services. Clause 14.4 allows the company to change the product's design, technical specifications and functions at any time. It is best understood as indefinite access to the current product while that product exists, not a permanent claim on everything the company later builds.
The subscription covers the standard report library, grammar and style checking, Rephrase, a daily Sparks allowance and one to three Chapter Critiques per day depending on tier. Charged separately are Story Credits, at $50 list and $35 or $25 with a Premium or Premium Pro discount, needed for Manuscript Analysis, Plot Analysis, Virtual Beta Reader and Marketability Analysis; and plagiarism checks, sold in packs from $10 for ten to $200 for a thousand.
Within three days of purchase, on yearly and lifetime plans only, and you must email to request it. Monthly plans are not refundable. Cancelling your subscription does not itself produce a refund. Story Credits are non-refundable, except that unused credits bought at the same time as a new subscription are refunded if you cancel inside the three-day window.
The terms state that texts submitted for grammar checking are deleted once checking completes and that your texts will not be used to improve the quality of the service. The Responsible AI page states the same as a flat promise. The company says its algorithms are trained on text hand-corrected by professional copyeditors. It also discloses that some features call large language models from third-party providers.
No. There is no official iOS or Android application, and the site provides no mobile download link. Searching the App Store by name returns an unrelated app called Pro Writing Aid - Storivo, published by a different seller entirely, which is not this product. Use is via the web editor, the Windows and Mac desktop integrations, or the Chrome, Edge and Firefox extensions.
English only. That includes General, British, US, Australian and Canadian English. No other language is supported on any plan.
They differ in emphasis. Grammarly is generally regarded as stronger on real-time correctness and interface polish for everyday writing. ProWritingAid goes deeper on structure, pacing, repetition and long-form fiction, integrates with Scrivener and Vellum, and offers a one-time purchase option that Grammarly does not. TechRadar's 2021 review judged ProWritingAid genuine competition while noting it trailed on features and usability, though that assessment predates the current product by more than four years.
They are reasonably solid, with caveats. Trustpilot shows 4.3 from 700 reviews with 424 in the past year, a large and current sample; Trustpilot notes the company has not recently solicited reviews, and that it has replied to only 9 percent of negative ones. The Chrome Web Store shows 4.8 from about seven thousand ratings across two hundred thousand users. G2 and Capterra could not be retrieved through either fetch channel, so their figures are not cited here at all. Independent technology press coverage amounts to a single 2021 TechRadar review, so there is little editorial assessment to weigh against the user ratings.
