Grammarly vs DeepL

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A direct comparison using the real catalog fields currently available for both products.

Last updated July 24, 2026

Tool A

Tool B

Grammarly

Grammarly Inc

DeepL

DeepL SE

Overview

Rating

—

Grammarly best for

Email writing

Professional writing

Academic writing

Content creation

Team writing consistency

DeepL best for

Professional document translation

Legal and business translation

Content localisation

Website translation

Multilingual communication

Pricing

Starting price

$12/mo

$8.74/moBest value

Pricing model

Freemium

Free plan

Yes

Free trial

Pricing notes

Free with basic checks. Pro $12/month billed annually ($30/month billed monthly). Business $15/member/month with team features and style guides.

Free with 500,000 characters/month (web), 3 document translations. Pro Starter $8.74/month. Advanced $28.74/month. Ultimate $57.49/month. Enterprise custom pricing.

Capabilities

Best for

Email writingProfessional writingAcademic writingContent creationTeam writing consistency

Professional document translationLegal and business translationContent localisationWebsite translationMultilingual communication

Target audience

StudentsWritersProfessionalsMarketing teamsCustomer serviceNon-native English speakers

Professional translatorsLegal teamsInternational businessesLocalisation teamsResearchers

AI type

Writing Assistant

Translation Model

Modalities

Text

TextDocument

Technical

Model provider

Grammarly

DeepL

Model names

—

API available

✓

Open source

Deployment

SaaS

SaaSAPI

Platforms

WebWindowsMaciOSAndroid

WebDesktopiOSAndroid

Integrations

Microsoft WordGoogle DocsChromeFirefoxSafariEdgeSlackGmail

CAT toolsNotionGoogle DocsSlackAPI

Team collaboration

✓

Trust & security

Security

Business plan includes SSO and admin controls. Enterprise with data handling agreements.

Pro and Enterprise plans are GDPR-compliant. Enterprise includes data processing agreements. Documents deleted after translation.

Privacy notes

The browser extension reads all text typed in a browser, including potentially sensitive content. Review settings and consider disabling for confidential work.

Free plan: documents stored temporarily. Pro: deleted immediately after translation. Enterprise: GDPR contractual data handling. DeepL does not use Pro content to train models.

Verdict

Pros

Best real-time grammar and style checking available
Widest integration support of any AI writing assistant
Free plan genuinely useful for everyday writing
Tone detection helps with professional communication

Best-in-class translation quality especially for European languages
Document translation preserves formatting
Pro plan data not used for model training
Strong API for automated multilingual workflows
Trusted by professional translators and legal teams

Cons

GrammarlyGO generative features weaker than dedicated AI writing tools
Monthly billing expensive at $30 versus $12 annual
Browser extension has broad data access
Limited value for non-English writing

Free plan has character limits restricting professional use
Coverage weaker for some Asian languages
DeepL Write available only in English and German
Not suited for real-time conversational translation