Best Proofreading Software

Sapling is a language model toolkit that sits on top of enterprise workspaces and messaging platforms to provide real-time writing suggestions, with browser extensions, Google Docs, Outlook and Word integrations, plus an API and a documented developer path.

Positioning as a toolkit for businesses and developers rather than as a consumer grammar checker is the meaningful distinction. The named integration targets are workspace and messaging platforms, which points at customer-facing communication rather than document authoring.

That focus makes sense once you consider where writing errors actually cost money. A typo in an internal document is embarrassing; a poorly worded reply from a support agent to a frustrated customer damages a relationship that took effort to build. Support and success teams write hundreds of short messages a day under time pressure, which is exactly the condition in which quality drops and nobody has time to proofread.

Sapling publishes capabilities around customer experience, efficiency and enablement, which is the vocabulary of contact centre operations rather than of writing tools, and it explains the shape of the product.

The API being a separately priced, usage-based plan rather than a feature of the subscription is the right structure for a developer-facing capability, since a team embedding suggestions in its own application has a completely different consumption pattern from seat-based users.

Pricing is published openly. A free tier costs $0 per month and requires no credit card, with a one-month trial of Sapling Pro. Pro is $25 per month, or $12 per month billed annually, for individuals. Enterprise starts at 10 seats at $15 per seat per month and adds self-hosting, custom integrations and single sign-on with SCIM. The API is a separate usage-based plan with a $5 minimum.

ProWritingAid is a writing improvement platform combining grammar and style checking with more than 25 in depth reports covering readability, sentence variety, repeated words, and cliches. AI powered tools called Sparks can rephrase text, adjust tone, or suggest ideas to overcome writer's block, while Manuscript Analysis and a Virtual Beta Reader feature give authors technical and subjective feedback on full length books. It integrates with Microsoft Word, Google Docs, and Scrivener, and supports real time collaboration with comments.

A free plan covers short 500 word checks, while paid Premium and Premium Pro plans unlock unlimited word counts and report runs, starting around $30 and $36 per month respectively, with substantial discounts for annual billing. A one time Lifetime plan is also available for users who prefer to avoid a recurring subscription.

Quillbot is an AI writing platform built around a paraphrasing tool, alongside a wider suite of writing, grammar, and content tools used for editing and creating text. The Paraphraser rewrites sentences and passages in different tones and styles, and is joined by a Grammar Checker, an AI Humanizer that rewords AI-generated text to read more naturally, a Summarizer that condenses long text, and a Translator. Additional tools cover originality and academic work, including an AI Detector, an AI Image Detector, a Plagiarism Checker, and a Citation Generator that formats references in APA, MLA, and Chicago style. Quillbot also includes an AI Chat assistant for brainstorming and answering questions, plus a Cover Letter Generator and Social Media Post Writer for job seekers and marketers.

Beyond text tools, Quillbot has expanded into visual and document tools, including an AI Image Generator, a Presentation Creator, a Background Remover, an AI Image Editor, and a set of PDF tools such as ChatPDF and merge, split, rotate, and page-extraction utilities, along with file converters between PDF, Word, Excel, and PowerPoint formats. The platform is used by students, academics, business owners, job seekers, and other professionals, and is accessible through browser extensions for Chrome, Edge, and Safari, native apps for iOS, Android, macOS, and Windows, and an add-in for Microsoft Word. A free plan covers basic use with daily and word-count limits, while the paid Premium plan removes most limits and adds features like unlimited paraphrasing, expanded language support, and a monthly plagiarism-check allowance.

ProofreaderPro.ai is an AI proofreading application aimed at academic writing, published alongside a text humanizer, paraphrasing tool, summarizer and translator, with free tools, a user guide and documentation.

The academic focus shows in the capability list rather than in the marketing. Tense conversion, UK and US English switching, export as plain text and Word, and full writing metrics are named on the paid tiers, and each of those addresses something specific to scholarly work.

Tense conversion sounds trivial and is not. Academic writing has strict and inconsistent tense conventions: a literature review is typically past or present perfect, methods are past, results are past, and discussion moves to present. Writers routinely drift between them across a long document, and correcting that manually across a thesis is tedious in a way no general grammar checker addresses.

UK and US English switching matters because the target journal or institution dictates the variant, and a paper written in one and submitted to the other looks careless in a context where carelessness is read as a proxy for rigour.

The two-model pricing structure is the practical detail. Subscription tiers suit continuous work such as a thesis, while one-off credit packs suit a single essay or paper. Credits never expire, which is unusually reasonable, and it means an occasional user is not paying a monthly fee to use something three times a year.

Plans are published as Free for casual editing and quick fixes, Academic for active researchers, and Academic Plus for power users and PhD writers, with credit packs sized for a single essay, a research paper and a dissertation.

Pricing is published openly with monthly and annual options. The Free plan is $0 and requires no credit card. Paid tier figures are split across page elements and could not be captured cleanly, so confirm current rates with the vendor.

Ginger is an AI-powered writing assistant that corrects text, improves style and suggests rephrasings, delivered through browser extensions for Chrome and Edge, a Mac application and a Windows download that works inside Microsoft Office.

Working inside the applications people already write in is the distinguishing choice, and it matters more than the correction quality on its own. A proofreading tool that requires pasting text into a separate window gets used for important documents and skipped for everything else, which is exactly backwards, because the everyday email that goes out with an error is more damaging in aggregate than the one document somebody remembered to check.

The Microsoft Office integration is the specific detail worth noting, since a large amount of professional writing still happens in Word and never passes through a browser. Tools built only as browser extensions cannot see that writing at all.

Rephrasing sits alongside grammar correction and addresses a different problem. Grammar checking finds sentences that are wrong; rephrasing addresses sentences that are correct but clumsy, which is the more common failing in professional writing and the harder one to self-diagnose.

Ginger is aimed at non-native English writers as much as native ones, which shapes the correction approach: the errors a second-language writer makes are systematically different from typing slips, involving article use, preposition choice and tense agreement rather than transposed letters.

Pricing is published across four terms with a standing 50 percent promotional discount. Monthly is billed at $13.00 and discounted to $6.5 per month. Quarterly is billed as one payment of $14.97, working out at $9.99 then $4.99 per month. Annual is billed as one payment of $45.00, at $7.50 then $3.75 per month. A two-year term is billed as one payment of $72.00, at $6.00 then $3.00 per month. A free tier is available through the browser extensions.