LanguageTool vs Writesonic

LanguageTool (AI-based multilingual grammar, style and paraphrasing checker (30+ languages, vendor-stated).) and Writesonic (AI search visibility and SEO platform with AI article creation and site audits.) compared side by side: plans and prices, vendor-stated features, platforms and sign-in, with the date each fact was checked. Matches based on official product information.

Based on official vendor pages, linked below
LanguageTool pricing checked: 2026-10-27
Writesonic pricing checked: 2026-10-31

At a glance

LanguageTool

AI writing tools

What it does: AI-based multilingual grammar, style and paraphrasing checker (30+ languages, vendor-stated).
Strong at: Strong fit for multilingual grammar checking with a few free AI rephrases per day.
Free plan: Yes - mixed free access
Paid plans from: US$24.9 / month

Pricing checked 2026-10-27 · Full LanguageTool record · Official site

Writesonic

AI writing tools

What it does: AI search visibility and SEO platform with AI article creation and site audits.
Strong at: Strong fit for SEO-oriented marketing content and AI search visibility tracking.
Free plan: No free plan
Paid plans from: US$99 / month

Pricing checked 2026-10-31 · Full Writesonic record · Official site

Plans & pricing

LanguageTool plans & pricing

Checked 2026-10-27. · Vendor pricing page Confirm prices and terms with the vendor before buying.

Premium

$24.90/mo monthly-billed (per languagetool.org/premium, 2026-10-27)

Writesonic plans & pricing

Checked 2026-10-31. · Vendor pricing page Confirm prices and terms with the vendor before buying.

Starter

$79 per month, billed annually

Basic

$199 per month, billed annually

Growth

$399 per month, billed annually

Enterprise

Custom

Side-by-side facts

	LanguageTool	Writesonic
Free plan	Yes - mixed free access	No free plan
Paid plans from	US$24.9 / month	US$99 / month
Platforms	Not stated	Web dashboard. Native app support was not established.
Sign-in	Optional for basic web checking. Account adds dictionary, statistics and saved texts.	Yes, an account is used for the Writesonic dashboard.
API	Yes. HTTP proofreading API with free limits and paid developer access.	Yes. The current public API covers GEO visibility data and workflows; do not assume every writing feature is exposed.

What each tool says it does

Writesonic - vendor-stated features

AI search visibility
AI content
Site audits
Page rewriting

Worth knowing before you choose

LanguageTool - worth knowing

Identity from owning pages: languagetool.org says "LanguageTool is an AI-based grammar checker"; /about describes AI-based style/tonality analysis and an AI paraphraser.
A writing checker, not a translator - filed under writing.
Core has been open source since 2003 (vendor-stated).
free non-AI checking standing, plus 3 AI rephrases per day - a renewable daily AI allowance (mixed).
'Sentence rephrasing by A.I.
3 per day' on the Basic column; free non-AI checking capped at 2,000 characters per text field; Basic usable without a user account per FAQ.
Daily renewable AI subscope - mixed.

Writesonic - worth knowing

Homepage (2026-10-27): '7-day free trial, No credit card'.
2026-10-27 : current plans are GEO/brand-tracking (Starter $99, Basic $249, Growth $499 monthly) - a different product shape from a generic consumer AI writer.
Current prices describe GEO and brand tracking.
USD 79/month is an annual-billed equivalent, not a month-to-month price.
FAQ says 12 months upfront.
Help docs disagree materially: Basic 100 articles/40 audits/2 projects versus current pricing 25/20/1; Growth 200 articles/60 audits/5 users versus 50/50/3.

Common questions

Is LanguageTool or Writesonic free to use?

LanguageTool: Yes - mixed free access (checked 2026-10-27). Writesonic: No free plan (checked 2026-10-31).

What do LanguageTool and Writesonic cost?

LanguageTool's entry paid plan is US$24.9 / month and Writesonic's is US$99 / month, from each vendor's pricing page (2026-10-27 and 2026-10-31 respectively). The tables above list every plan each vendor published.

Which is better, LanguageTool or Writesonic?

It depends on the job. LanguageTool: Strong fit for multilingual grammar checking with a few free AI rephrases per day. Writesonic: Strong fit for SEO-oriented marketing content and AI search visibility tracking. The feature and pricing tables above show where they differ.

Where do these facts come from?

Every fact on this page is read from the vendors' own product and pricing pages, with the checked date shown beside it. Links to both official pages are at the top of each column.

Keep comparing

This comparison is not a recommendation: it sets out what each vendor states on its own pages, with the dates those pages were checked. Prices and features change - confirm with the vendor before buying.