Grammarly vs Lex

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Data last refreshed October 2026

Grammarly

Superhuman Platform Inc.

Free AI Writing Assistance

Freemium

81% verification coverage

Lex

Lex, Inc.

Collaborative documents, with powerful AI editing tools.

Freemium

78% verification coverage

Trust & Reliability

Grammarly

Users:10M-50M

Customers (per vendor):Databricks, Indeed, Zoom +4

GDPR

SOC 2

HIPAA

Lex

Users:100K-1M

Customers (per vendor):Berkeley, BuzzFeed, Canva +7

Overall Winner: Grammarly

6.8/10 vs Lex at 5.2/10

Leads in:

Ease of Use

Compliance & Data Protection

Customization

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

AI Comparison Summary

Grammarly

6.8

avg score

Lex

5.2

avg score

Grammarly leads overall — particularly in Ease of Use and Integration and 1 more.

Based on 6 dimensions

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

Overall Winner

Grammarly

6.8 / 10

Grammarly

Best For

Individuals seeking mistake-free writing

Teams and businesses aiming for consistent, on-brand communication

Students and institutions needing writing assistance and plagiarism checks

Marketing teams creating clear and convincing content

Lex

Best For

Founders writing documents and iterating drafts

Writers seeking AI assistance for editing and brainstorming

Teams collaborating on documents with AI tools

Academics drafting papers for journals

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

Grammarly is best for

🤖Automation & Agents5.5🔍Research5.5✍️Writing & Content5.3

Lex is best for

🎬Video9.0💬Chat & Conversation6.0🤖Automation & Agents5.3

Filter by your use case:

Limitations

Grammarly

Cons

Enterprise features like SSO and data loss prevention are only available on the highest tier
Advanced AI prompts are limited on the Free and Pro plans
Requires explicit permission to record typed or copied input for some features
Grammarly cannot access sensitive fields like passwords and payment information on a best-efforts basis

Lex

Cons

No longer accepting new customers
Track Changes feature is coming soon
Pricing information for Lex Pro is only visible to existing users upon login
AI limits apply for free users
Does not respond to or honor Do Not Track signals
Cookie-based opt-outs are not effective on mobile applications

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Customization5

Support5

Integration5

Compliance & Data Protection5

Performance5

Planning Quality5

Dimension Comparison

Grammarly

6.8

/ 10

Clear winner

Lex

5.2

/ 10

Dimension Breakdown

Ease of Use

How intuitive is onboarding, UI navigation, and day-to-day usage for the target audience?

Grammarly

8.0▲ +2.0

Lex

6.0

Customization

Calculated

How much can users tailor workflows, settings, prompts, or outputs to their needs?

Grammarly

6.0▲ +1.0

Lex

5.0

Support

How strong is the documentation, customer support, community, and learning resources?

Grammarly

6.0

Lex

6.0

Integration

Calculated

How well does it connect with other tools, APIs, and workflows?

Grammarly

6.0▲ +3.0

Lex

3.0

Compliance & Data Protection

Calculated

Compliance certifications and data-protection posture, counted from ten verified signals: SOC 2 Type II, GDPR compliance, HIPAA, WCAG AA/AAA, PII redaction, licensed-only training, a published sub-processor list, a downloadable DPA, not training on user data, and a documented deletion path

Grammarly

7.0▲ +4.0

Lex

3.0

Performance

Calculated

Latency + throughput speed

Grammarly

8.0

Lex

8.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Grammarly

—

Lex

—

Calculated = derived from structured signals (integration count, API/open-source config, compliance certs, response-time). AI = LLM-assessed from public website content. Methodology

Task Performance

Grammarly

Task

Lex

4.0

Blog Writing

5.0

4.0

Article Generation

4.0

2.0

Seo Optimization

1.0

5.0

Content Research

4.0

Headline Creation

7.0

6.0

Content Repurposing

3.0

9.0

Tone Adaptation

7.0

4.0

Multi Format Output

6.0

7.0

Collaboration Workflow

8.0

5.0

Template Library

5.0

6.0

Text Summarization

6.0

7.0

Language Translation

3.0

* Task scores (1–10) are algorithmically generated from publicly available data.

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

What are the main differences between Grammarly and Lex?

Grammarly — "Free AI Writing Assistance". Lex — "Collaborative documents, with powerful AI editing tools". The Features section on this page compares them side by side.

Who is Grammarly best for compared with Lex?

Grammarly is best for Individuals seeking mistake-free writing; and for Teams and businesses aiming for consistent, on-brand communication. Lex is best for Founders writing documents and iterating drafts; and for Writers seeking AI assistance for editing and brainstorming.

How does the pricing of Grammarly compare with Lex?

Grammarly is freemium, includes a free plan, paid plans start at $30/month, offers a free trial. Lex is freemium, includes a free plan. Always verify current pricing with the vendor.

Does Grammarly or Lex have a free plan?

Grammarly has a free plan and offers a free trial. Lex has a free plan. Always verify current pricing with the vendor.

Do Grammarly and Lex offer an API?

Grammarly offers API access on its enterprise plans. Lex offers a public API.

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