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Grammarly vs Isgen AI Detector

Side-by-side comparison of features, pricing, ratings, and alternatives.

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Grammarly
GrammarlyAI-powered writing assistant for grammar, tone, and clarity.
Isgen AI Detector
Isgen AI DetectorThe most accurate AI detector for ChatGPT and more, supporting over 80 languages.
Overview
Description

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, and style in real time across browsers, desktop apps, and mobile keyboards. It integrates directly into Gmail, Google Docs, Microsoft Word, Slack, and thousands of other websites via a browser extension. Beyond basic correctness, Grammarly analyzes tone and clarity, suggesting rewrites to make writing more concise, confident, or friendly depending on the context and audience selected by the user. GrammarlyGO adds generative AI features for drafting emails, replying to messages, and rewriting passages on demand, while Grammarly Business adds brand style guides and analytics for teams that need consistent written communication across an organization.

Isgen AI Detector is a sophisticated tool designed to identify AI-generated content with high accuracy across numerous languages. It goes beyond simple detection by offering deep insights into text, pinpointing specific sentences and phrases that exhibit AI writing patterns. This feature is particularly valuable for educators and content creators who need to ensure the authenticity and originality of written material. The platform supports over 80 languages, setting it apart from many competitors that focus primarily on English. Isgen employs state-of-the-art AI systems, including large language models trained on vast datasets, to achieve its accuracy. The service is trusted by educators worldwide and aims to empower individuals by bringing clarity to a digital landscape increasingly populated by AI-generated text. Isgen also offers an integrated AI Editor that allows users to write, edit, and humanize content in real-time, with an AI score updating as they work. This all-in-one solution streamlines the content creation and verification process, making it easier for users to maintain originality and avoid potential issues with AI-detected content.

Pricing
Freemium

Free for basic corrections; Premium starts at $12/month, Business at $15/user/month.

Freemium

Isgen offers three subscription plans billed annually — Academic at $8/month, Writing at $15/month, and Ultimate at $24/month — with a free option to start without sign up.

Category
AI Writing & Content
AI Writing & Content
Best for
Professionals, students, and content teams
Students, Educators, Content Creators, Writers, Business Professionals
Specifications
platforms
Web, Mac, Windows, iOS, Android
—
deployment
Browser Extension
—
open source
No
—
api available
Yes
—
support options
Help Center, Email
—
key integrations
Gmail, Google Docs, Microsoft Word, Slack
—
AI Models Detected
—
ChatGPT, GPT-5, Claude, Deepseek, Gemini, Llama, Grok, Mistral, Microsoft Copilot, xAI, Qwen, and more.
Supported Languages
—
Over 80
False Positive Ratio
—
Nearly 0%
Accuracy Claim (Isgen)
—
96.4%
Free Tier Availability
—
Yes, "No Sign Up To Start Free"
Pricing (Writing Plan)
—
$15/month (billed annually)
Pricing (Academic Plan)
—
$8/month (billed annually)
Pricing (Ultimate Plan)
—
$24/month (billed annually)
Accuracy Claim (Market Benchmark)
—
81.22%
Pros & Cons
Pros
  • Works across almost every app via browser extension
  • Good tone and clarity suggestions beyond basic grammar
  • GrammarlyGO speeds up drafting
  • Free tier is genuinely useful
  • Highly accurate AI detection across a wide range of AI models including ChatGPT, GPT-5, Claude, and Gemini.
  • Supports over 80 languages, offering broad accessibility beyond English.
  • Provides detailed, phrase-level analysis to pinpoint specific AI-influenced text sections.
  • Integrates an AI Editor for real-time writing, editing, and humanization with AI score feedback.
Cons
  • Premium features behind a subscription
  • Occasional over-aggressive suggestions
  • Privacy concerns for some sensitive writing contexts
  • While highly accurate, AI detectors are not 100% infallible and may produce occasional false positives.
  • Premium features and higher word limits are locked behind paid plans, though a free tier is available for basic use.
Community & Metrics
Upvotes
8
0
User rating
3.0 (2)
Not enough data

What reviewers say

Grammarly Reviews

3.0 (2)
Verified User

Good, not great

Grammarly is solid overall, though it's not perfect. On the plus side, good tone and clarity suggestions beyond basic grammar. That said, premium features behind a subscription, which held us back from rating it higher.

Verified User

Good, not great

Mixed feelings about Grammarly after using it for a while. On the plus side, free tier is genuinely useful. That said, privacy concerns for some sensitive writing contexts, which held us back from rating it higher.

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Isgen AI Detector Reviews

No reviews yet.

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The Verdict

AI-generated from listing data

Isgen AI Detector excels at specialized AI‑generated text detection with multilingual support, while Grammarly offers broader writing assistance and integrations.

Key differences

  • •Isgen focuses on AI detection accuracy (96.4% claim) and multilingual coverage (80+ languages); Grammarly provides general grammar, tone, and plagiarism tools.
  • •Isgen includes a humanization editor and phrase‑level analysis; Grammarly offers tone detection, style guides, and AI drafting (GrammarlyGO).
  • •Isgen’s free tier works without sign‑up and has lower paid plans ($8‑$15/mo); Grammarly’s free tier is limited and premium starts at $12/mo per user.
DimensionWinner

Pricing & value

Isgen’s free tier requires no sign‑up; paid plans start at $8/mo vs Grammarly Premium $12/mo.

Isgen AI Detector

Ease of use / learning curve

Grammarly works via browser extensions across many apps, making it immediately familiar to most users.

Grammarly

Features & depth

Grammarly offers grammar, tone, plagiarism, and AI drafting; Isgen is limited to AI detection and related tools.

Grammarly

Integrations & ecosystem

Grammarly integrates with Gmail, Google Docs, Word, Slack and has mobile apps; Isgen has no listed integrations.

Grammarly

Collaboration

Grammarly provides brand style guides for teams; Isgen has no collaboration features mentioned.

Grammarly

Scalability

Isgen supports bulk file uploads and high‑volume detection; Grammarly’s bulk capabilities are not specified.

Isgen AI Detector

Support & security

Grammarly lists help‑center and email support; Isgen’s support options are not specified.

Grammarly

Choose Grammarly if…

Users who want comprehensive grammar, tone, and plagiarism assistance with wide app integration.

Choose Isgen AI Detector if…

Educators, researchers, or businesses needing precise AI‑generated text detection across many languages.

Common questions

Which tool is cheaper for a single user?

Isgen’s Academic plan is $8/month billed annually; Grammarly Premium starts at $12/month.

Can either tool check for plagiarism?

Both offer plagiarism detection: Isgen in premium plans, Grammarly across all paid tiers.

Do they work inside other applications like Google Docs?

Grammarly works via browser extensions in Google Docs and many apps; Isgen has no listed integrations.