What is the price difference between Grammarly and Lumo by Proton?

Grammarly starts at $12/month while Lumo by Proton starts at free.

GrammarlyvsLumo by Proton

Q: Is Grammarly better than Lumo by Proton?

Grammarly wins 3 benchmarks and has 6 out of 6 features analyzed. Lumo by Proton wins 0 benchmarks and has 0 out of 6 features. The best choice depends on your specific use case and budget.

A comprehensive side-by-side comparison to help you choose the right AI tool for your workflow.

Both Grammarly and Lumo by Proton are Writing AI tools.

Grammarly — AI-powered writing assistant that checks grammar, spelling, punctuation, clarity, and tone. Integrates with browsers, email, and documents to help you write confidently everywhere.

Lumo by Proton — Privacy-first AI assistant with zero-access encryption, no logging or profiling, open-source code, and user-controlled conversations, subject to GDPR regulations.

Pricing: Grammarly starts at $12/mo, while Lumo by Proton starts at a paid tier. In benchmarks, Grammarly leads with 3 wins.

The full breakdown below covers features, benchmarks, and pricing to help you decide which Writing AI tool best fits your workflow.

Our Verdict

Grammarly leads with 3 benchmark wins and 6 features.

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Unique Features

Grammarly

Lumo by Proton

0 shared

Benchmark Wins

Grammarly

Lumo by Proton

Starting Price

$12

/mo

Free

/mo

Grammarly

Writingfreemium

AI-powered writing assistant that checks grammar, spelling, punctuation, clarity, and tone. Integrates with browsers, email, and documents to help you write confidently everywhere.

Start Free Details

Lumo by Proton

Code Assistantfreemium

Privacy-first AI assistant with zero-access encryption, no logging or profiling, open-source code, and user-controlled conversations, subject to GDPR regulations.

Start Free Details

Quick Specs

Attribute	Grammarly	Lumo by Proton
Category	Writing	Code Assistant
Pricing Type	freemium	freemium
Starting Price	$12/mo	Free
Total Features	6	0

Feature-by-Feature Comparison6 features analyzed

Feature	Grammarly	Lumo by Proton
Grammar & spelling check	EXCLUSIVE
Tone detection	EXCLUSIVE
Plagiarism detection	EXCLUSIVE
GrammarlyGO AI writing	EXCLUSIVE
Browser extension	EXCLUSIVE
Microsoft Office integration	EXCLUSIVE

Feature Score

Grammarly: 6/6Lumo by Proton: 0/6

Benchmark Comparison3 metrics

Benchmark	Grammarly	Lumo by Proton
languages	1	—
integrations	500	—
grammar accuracy	95	—

Who should use Grammarly?

Teams wanting to try before committing

Pros

Free tier available to get started
6 documented features
Benchmark data available for evaluation

Who should use Lumo by Proton?

Developers & engineersTeams wanting to try before committing

Pros

Free tier available to get started
Built specifically for developer workflows

Cons

Limited feature documentation
No public benchmark data

Ready to choose?

Try both tools and see which fits your workflow best.

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Frequently Asked Questions

Is Grammarly better than Lumo by Proton?

Grammarly wins 3 benchmarks and has 6/6 features. Lumo by Proton wins 0 benchmarks and has 0/6 features. The best choice depends on your specific use case and budget.

What is the price difference?

Grammarly starts at $12/mo, while Lumo by Proton is free.

What features does Grammarly have that Lumo by Proton doesn't?

Grammarly has 6 exclusive features not found in Lumo by Proton. Both tools share 0 common features. See the full breakdown above.

Attribute

Grammarly

Lumo by Proton