Wordtune, from AI21 Labs, is the rewriter people reach for when a sentence is correct but wrong: casual to formal, shorter to longer, plus AI suggestions, summaries and grammar checks across the browser extension, Word, Google Docs and mobile. On 14 September 2026 its plans page listed Basic at $0 with 10 rewrites a day and 3 AI generations a month; Advanced at $6.99 a month billed monthly or $4.89 a month billed annually with 30 rewrites a day and 15 AI generations a month; and Unlimited, marked recommended, at $9.99 a month billed monthly or $6.99 a month billed annually with unlimited rewrites, generations and summaries. The monthly toggle carried a "-50%" badge, so the monthly rates may be promotional. Paid plans open with a 3-day free trial, and a Business tier with SAML SSO and centralised billing is sold on request. Wordtune ranks on Google for "grammarly alternatives" with its own comparison page.
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