Wordtune
Highlights one clunky sentence, hands you several better versions to choose from — genuinely good at that specific job, and honestly not built to fix a document's bigger structural problems.
What is Wordtune?
Wordtune was built by AI21 Labs, an Israeli AI research company founded in 2017 in Tel Aviv by Yoav Shoham, Ori Goshen, and Amnon Shashua, backed by investment from Google and Nvidia. Released in October 2020 as AI21's first consumer-facing product, it was built on a specific, well-articulated premise: the writing process hadn't fundamentally changed since Microsoft Word launched in the 1980s, and AI could help people write better rather than just catch their spelling mistakes. That premise shows up directly in how the tool works — you highlight one sentence at a time, and Wordtune returns several alternative phrasings to choose from, each preserving your original meaning while adjusting length, formality, or clarity. It's a genuinely different mechanic than a document-wide editor: Wordtune operates sentence by sentence, not paragraph by paragraph or across a whole draft, and by August 2025 it had delivered more than 782 million rewrite suggestions to over 10 million users.
Beyond the core Rewrite feature, Spices adds examples, counterarguments, or a touch of humor to make a sentence more engaging, Wordtune Read (the summarizer) condenses long articles into key points, though the free tier caps this at just 3 uses a month, and tone adjustment switches cleanly between formal and casual registers. The honest, consistently-noted limitation is exactly what you'd expect from a sentence-level tool: because it works one sentence at a time, a genuinely structural problem in your document — a confusing argument order, a missing transition, an unclear thesis — stays exactly as it was, since Wordtune was never looking at the whole page to begin with. Independent reviewers also note suggestions can occasionally feel generic rather than deeply context-aware, and nuanced tone gradations beyond simple formal/casual — persuasive, empathetic, urgent — are more limited than the core rewrite feature. One detail worth flagging honestly: reported pricing for the paid tiers varies noticeably across independent sources (numbers as different as $6.99, $9.99, $13.99, and $19.99 a month all appear depending on the source and billing cycle), so it's worth confirming the live pricing page directly rather than trusting any single figure, including this one.
Company history and the core sentence-level mechanic are drawn from multiple independent 2026 reviews (knowara.com, Fahim AI, ToolsForHumans). The pricing inconsistency across sources is a genuine, observable discrepancy — confirm current tiers directly at wordtune.com/pricing before comparing plans.
Key features
Rewrite
Multiple alternative phrasings for any selected sentence, preserving original meaning.
Spices
Adds examples, counterarguments, or humor to make a sentence more engaging.
Tone adjustment
Switches cleanly between formal and casual registers with one click.
Wordtune Read
Summarizes long articles into digestible key points (limited on the free tier).
Browser extension & integrations
Works inline across Gmail, Google Docs, Facebook, and most web apps.
GDPR compliance
Enterprise-level security posture backed by AI21 Labs' broader reputation.
Pricing
Free
- Enough to test whether the tool fits your workflow
- Wordtune Read capped at 3 summaries/month
- No credit card required
Unlimited
- Removes the daily rewrite cap entirely
- Annual billing consistently cheaper than monthly across sources
- Best for daily writers — emails, articles, essays
Advanced / Business
- Positioned between Free and Unlimited on some pricing pages
- Business tier is custom-quoted for teams
- No public developer API — separate from AI21 Studio's API
Wordtune's own developer-facing API is offered separately through AI21 Studio, not bundled with the consumer Wordtune subscription. Given the reported pricing inconsistency across independent sources, treat all figures here as approximate and confirm current rates directly at wordtune.com/pricing.
Available models
Integrations & platforms
Pros, cons & best for
Pros
- Genuinely strong sentence-level rewriting, backed by credible AI21 Labs research
- Seamless browser integration, low-friction one-click adoption
- Clean formal/casual tone switching that reliably preserves meaning
Cons
- Works sentence by sentence only — can't fix document-level structural problems
- Suggestions can feel generic, with limited nuanced tone gradations
- Reported pricing is genuinely inconsistent across independent sources
Best for
- Non-native English speakers wanting business writing that sounds natural
- Students and professionals with a draft who need help rephrasing specific sentences
- Not the pick for full-document generation or fixing structural writing problems
Take a look inside
Alternatives
For broader grammar checking or academic paraphrasing instead:
Our verdict
Wordtune does exactly what its founders set out to build: a tool that helps you write better sentences, not just catch your typos, and the sentence-level rewriting genuinely delivers multiple usable options rather than one flat suggestion. Backed by AI21 Labs' credible research pedigree and real investment from Google and Nvidia, it's earned its reputation as one of the stronger rewriting-specific tools available, particularly for non-native speakers polishing professional English. The honest limitation is baked into its core design: because it works one sentence at a time, it simply can't address a document's bigger structural issues, and reviewers consistently note occasional generic-feeling suggestions. Do the extra step of checking the live pricing page directly before subscribing, since reported figures vary more than they should across independent sources. For sentence-level polish specifically, it remains a genuinely useful, well-regarded tool.
FAQ
Can Wordtune write a full article or document for me?
No, it's specifically designed to rewrite text you've already written, one sentence at a time — for full-draft generation from scratch, tools like Jasper or Copy.ai are better suited.
Who makes Wordtune?
AI21 Labs, an Israeli AI research company founded in 2017 in Tel Aviv, backed by investment from Google and Nvidia. Wordtune was released in October 2020 as the company's first consumer product.
Is Wordtune free to use?
Yes, a free tier includes unlimited grammar checks and 10 sentence rewrites a day, enough to test whether the tool fits your workflow before subscribing to remove the daily cap.
Why do different sources report different Wordtune prices?
Reported figures genuinely vary across independent reviews, ranging from around $6.99 to $19.99 a month depending on the source and billing cycle — confirm the current live pricing page directly rather than relying on any single figure.
Can Wordtune fix a poorly structured document?
Not directly — since it works sentence by sentence rather than at the document level, structural issues like confusing argument order or missing transitions stay unaddressed even after rewriting individual sentences.
How is Wordtune different from Grammarly?
Grammarly focuses on catching grammar, spelling, and style errors across the whole web; Wordtune focuses specifically on rewriting and restructuring individual sentences for tone and clarity. Many writers use both together for different purposes.