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Wordtune

Wordtune is an AI writing assistant that helps users paraphrase, rewrite, and refine their writing with grammar corre...

Updated Jun 2026
writing#write-content
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Free plan Teams Browser extension

About Wordtune

Wordtune is a browser-based AI writing assistant focused on refining existing text rather than generating it from scratch. It paraphrases, rewrites, and adjusts tone, checks grammar and spelling, summarizes long text and videos, and generates original copy, with added support for non-native English writers. Built by AI21 Labs, it offers a functional free tier plus paid plans that raise or remove usage caps.

Wordtune is an AI writing companion built to help people shape rough, scattered thoughts into clear, polished prose. Rather than generating content wholesale, its core strength is refinement: paraphrasing, rewriting, and offering context-aware suggestions that preserve your intended meaning while sharpening tone, clarity, and phrasing. It works across everyday writing contexts, from professional emails and marketing copy to academic essays and casual messages. The tool combines several capabilities under one interface. One-click paraphrasing and rewriting surface multiple context-based alternatives that match your existing style. A tone control lets you toggle between formal and casual registers, while grammar and spelling checks handle proofreading. Beyond editing, Wordtune can generate original copy, continue writing where you left off to break through writer's block, and summarize long text or even videos to speed up research. Wordtune also targets non-native English writers with features like Smart Translate and Smart Synonyms, aiming to make writing sound natural and fluent. A Humanize AI feature is positioned to smooth over machine-generated content, and the tool emphasizes fact-checking against multiple sources for its AI writing outputs. Access is primarily browser-based, with a genuinely free tier that covers unlimited spelling and grammar checks alongside capped daily rewrites and monthly summarizations. Paid plans unlock higher or unlimited usage. As with any freemium tool, buyers should confirm current limits and pricing on the official site, since tiers and caps change over time. Wordtune is developed by AI21 Labs, an Israeli AI company, which gives it a foundation in in-house language model research. This distinguishes it from thin wrappers built entirely on third-party APIs, though buyers evaluating it should still weigh its rewriting-first focus against more general-purpose writing generators.

TL;DR

Wordtune is a browser-based AI writing assistant from AI21 Labs that focuses on refining text through paraphrasing, rewriting, tone adjustment, grammar checks, and summarization rather than pure generation. It offers a usable free tier and paid plans up to roughly $9.99/month, with particular appeal to professionals, students, and non-native English writers. Its rewriting-first design is a strength for polishing but a limitation for high-volume long-form drafting.

Company overview

Wordtune is developed by AI21 Labs, an Israeli artificial intelligence startup working on tools to change how people read and write. Ori Goshen is associated with the company's founding team, and AI21 Labs builds its own large language models that underpin Wordtune's rewriting and generation capabilities.

The company's mission centers on helping people express themselves more clearly and confidently in English, and Wordtune is its flagship consumer-facing writing productivity product. Building on in-house model research gives Wordtune a technical foundation distinct from tools that depend solely on third-party APIs.

Product features

Wordtune's core capability is contextual rewriting: it offers multiple paraphrase and rewrite suggestions that preserve meaning while improving clarity, tone, and phrasing. Users can toggle between formal and casual tones, run unlimited grammar and spelling checks, and use inline suggestions to elaborate, clarify, emphasize, or add conclusions.

Beyond editing, the product generates original context-based copy, continues writing to overcome writer's block, and summarizes both long text and videos to accelerate research. Features like Smart Translate and Smart Synonyms specifically target non-native English speakers, while a Humanize AI feature aims to make machine-generated content read more naturally. The company emphasizes fact-checking AI outputs against multiple sources.

Target market

Wordtune serves individual knowledge workers, students, marketers, and professionals who write in English and want to improve clarity and fluency. It is especially relevant to non-native English speakers and to anyone who edits emails, essays, and content regularly. Its freemium structure makes it accessible to casual users while paid tiers target heavier daily writers.

Buyer personas

End users

Everyday writers, students, marketers, and non-native English speakers who use Wordtune to rewrite, proofread, and summarize their own text. They value inline suggestions that keep their voice intact and appreciate the free tier for casual use.

Buyers

Individual subscribers deciding between the free, Advanced, and Unlimited plans based on how often they hit usage caps. For teams, the buyer is often a manager evaluating a low-cost writing aid for a communications or content group.

Key influencers

Writing instructors, language coaches, and content team leads who recommend accessible tools for improving clarity and fluency. Peers who share productivity workflows also drive adoption.

Ideal customer profile

A frequent English-language writer, particularly a professional, student, or non-native speaker, who wants to polish and rephrase existing text quickly and affordably rather than generate long-form content from scratch.

Funding & performance

Wordtune's parent, AI21 Labs, is well funded: after a 2019 seed and a $25 million Series A, it raised a $64 million Series B (around a $664 million valuation), a Series C extended to $208 million (2023, about a $1.4 billion valuation), and a $300 million Series D in May 2025 led by Nvidia and Google — roughly $636 million in total funding.

Pros & cons

Pros

  • Offers a free plan with no credit card required for getting started
  • Provides multiple writing tools in one platform: paraphrasing, rewriting, grammar checking, summarization, and AI content generation
  • Includes video summarization capability alongside text summarization

Cons

  • Research does not reveal specific feature limits or usage caps on the free plan
  • No clear information about integration capabilities or platform compatibility beyond web access

Key features

Browser extension
Team collaboration
Input types
text, video
Output types
text

Compare key features

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Feature
Wordtune
TextCortex
Spellbook
Pricing
Freemium
Freemium
Freemium
Free plan
Yes
Yes
Yes
Free trial
No
No
No
Team support
Yes
Yes
Yes

Frequently asked questions

How much does Wordtune actually cost?+

Wordtune uses a freemium model with a $0 Basic tier that includes unlimited grammar and spelling checks plus capped daily rewrites and monthly summarizations. Paid plans start around $4.89 to $6.99 per month for Advanced and roughly $6.99 to $9.99 per month for the Unlimited plan when billed annually. Pricing and caps change periodically, so verify current numbers on the official plans page.

How does Wordtune work day to day?+

You write or paste text and Wordtune offers context-based rewrite and paraphrase suggestions that match your style. You can adjust tone between formal and casual, run grammar and spelling checks, generate original copy, continue writing to break through blocks, and summarize long text or videos. The suggestions appear inline so you can accept, tweak, or ignore them.

What platforms and browsers does Wordtune support?+

Wordtune is primarily browser-based and ships as a browser extension that works across common web writing surfaces, alongside its own web editor. There is no strong reliance on a desktop install, so setup mostly involves creating an account and adding the extension. Confirm current supported browsers and apps on the official site.

Does Wordtune support languages other than English?+

Wordtune is built around improving English writing and includes Smart Translate features aimed at helping non-native speakers sound natural in English. Its rewriting, tone, and summarization capabilities are focused on English output rather than broad multilingual authoring. Check the site for the latest on any additional language support.

Is my content private and secure with Wordtune?+

Wordtune processes your text through its cloud service to generate suggestions, so content is sent to its servers for analysis. As with any cloud writing assistant, sensitive or regulated material should be handled according to your organization's data policies. Review Wordtune's current privacy policy and terms for specifics on data handling and retention.

Can Wordtune generate original content or just edit existing text?+

It does both, though its heritage is in rewriting and refinement. Beyond paraphrasing and grammar correction, it can produce original context-based copy, continue writing where you left off, and humanize AI-generated content. For long-form original drafting, however, dedicated generation tools may offer more depth.

Is Wordtune free?+

Yes, Wordtune offers a free plan that requires no credit card to get started. The research indicates a freemium pricing model, meaning there are paid tiers with additional features, but specific limitations of the free plan were not detailed in the available research.

What does Wordtune integrate with?+

Integration details were not found in our research. The homepage mentions browser-based access and getting started through their web app, but specific integrations with other platforms or tools were not documented in the available information.

How does Wordtune compare to alternatives?+

The research provided does not include comparison data with competing tools. Wordtune distinguishes itself by combining multiple writing functions—paraphrasing, rewriting, grammar checking, summarization, and AI humanization—in a single platform with a free tier, but direct feature or performance comparisons were not available.

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