Grammarly vs Writefull

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

Writefull

ThinqLab Ltd

AI-powered language help for academic writing.

Freemium

73% verification coverage

Trust & Reliability

Grammarly

Users:10M-50M

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

GDPR

SOC 2

HIPAA

Writefull

Customers (per vendor):Stanford, Oxford, Monash University +4

Overall Winner: Grammarly

6.8/10 vs Writefull at 4.5/10

Leads in:

Performance

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

Writefull

4.5

avg score

Grammarly leads overall — particularly in Support and Integration and 2 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

Writefull

Best For

Students and researchers writing academic papers

Institutions supporting academic writing

Publishers and copyeditors improving texts

* 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

Writefull is best for

✍️Writing & Content3.6🔍Research3.3💬Chat & Conversation3.0

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

Writefull

Cons

Limited features on the Free plan
Usage restrictions on document checks and character count for free users (30 documents/30 days, 10 documents/24 hours, 600,000 characters/30 days)
Outputs may not be unique and may contain incorrect information, requiring human review
Non-commercial use only for basic services

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

Writefull

4.5

/ 10

Dimension Breakdown

Ease of Use

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

Grammarly

8.0

Writefull

8.0

Customization

Calculated

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

Grammarly

6.0▲ +1.0

Writefull

5.0

Support

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

Grammarly

6.0▲ +2.0

Writefull

4.0

Integration

Calculated

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

Grammarly

6.0▲ +3.0

Writefull

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▲ +5.0

Writefull

2.0

Performance

Calculated

Latency + throughput speed

Grammarly

8.0▲ +3.0

Writefull

5.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Grammarly

—

Writefull

—

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

Writefull

4.0

Blog Writing

2.0

4.0

Article Generation

2.0

Seo Optimization

1.0

5.0

Content Research

3.0

4.0

Headline Creation

7.0

6.0

Content Repurposing

4.0

9.0

Tone Adaptation

7.0

4.0

Multi Format Output

3.0

7.0

Collaboration Workflow

3.0

5.0

Template Library

1.0

6.0

Text Summarization

6.0

7.0

Language Translation

2.0

* 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 Writefull?

Grammarly — "Free AI Writing Assistance". Writefull — "AI-powered language help for academic writing". The Features section on this page compares them side by side.

Who is Grammarly best for compared with Writefull?

Grammarly is best for Individuals seeking mistake-free writing; and for Teams and businesses aiming for consistent, on-brand communication. Writefull is best for Students and researchers writing academic papers; and for Institutions supporting academic writing.

How does the pricing of Grammarly compare with Writefull?

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

Does Grammarly or Writefull have a free plan?

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

Do Grammarly and Writefull offer an API?

Grammarly offers API access on its enterprise plans. Writefull offers API access on its enterprise plans.

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