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Head-to-head · Extensions

1Password vs Grammarly

  • Updated Sep 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score 1Password #1 in Extensions 9.0/10 From $2.99/user/mo (annual) · 14-day trial ✓ 0 of 1 features Visit 1Password
Grammarly #10 in Extensions 6.3/10 Free plan · paid from $12/user/mo Free plan✓ 0 of 1 features Visit Grammarly

1Password leads on 1 check, Grammarly on 1, and 0 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest score1Password · 9.0/10
  • Lowest starting price1Password · $2.99/user/mo
  • Free planonly Grammarly

1Password scores higher on our rubric for extensions: 9.0 against 6.3 out of 10; our editors rank them #1 and #10.

Grammarly offers free plan; 1Password doesn't. 1Password is cheaper to start at $2.99/user/mo against $12/user/mo.

1Password is the better fit for individuals and businesses managing shared credentials. Grammarly is the better fit for writing assistance across browser, desktop and mobile.

  • 1Password fits best

    Individuals and businesses managing shared credentials

  • Grammarly fits best

    Writing assistance across browser, desktop and mobile

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature 1Password 9.0/10 Visit ↗ Grammarly 6.3/10 Visit ↗
At a glance
Editor score 9.0 6.3
Ranking #1 in Extensions #10 in Extensions
Best for Individuals and businesses managing shared credentials Writing assistance across browser, desktop and mobile
Pricing model Paid Free plan + paid
Starting price $2.99/user/mo (best) $12/user/mo
Free plan — ✓ (best)
Free trial — —
Deployment Cloud, Desktop, Mobile, Browser extension Cloud, Desktop, Mobile, Browser extension
Platforms Web, Windows, macOS, Linux, iOS, Android, Chrome extension Web, Windows, macOS, iOS, Android, Chrome extension
Support Email, Community, Docs · 24/7 Docs
Compliance SOC 2, ISO 27001, GDPR, 2FA SOC 2, ISO 27001, HIPAA, PCI DSS, SSO/SAML, 2FA
Integrations 11 integrations 8 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features 1Password 0/1 · Grammarly 0/1
Team sharing Not published Not published
Specs
Supported browsers Not published Not published
Primary function Not published Not published
Supported devices Not published Not published
Free plan limit Not published Not published
Our review
Pros
  • Autofill, passkey storage, and Watchtower alerts across major platforms
  • Secure item and vault sharing, with unlimited devices on Individual
  • Business plans add role-based controls and identity-provider integrations
  • Checks grammar, spelling, punctuation, clarity, fluency, style, and tone
  • Works across web, desktop, mobile, and apps such as Word and Google Docs
  • Pro adds full-sentence rewrites, detection tools, and more AI prompts
Cons
  • No free plan; Individual starts at $2.99 per user per month billed annually
  • Teams Starter Pack is priced per month, not per user
  • Passkey-based account unlock varies by platform and account state
  • Free includes 100 AI prompts per month
  • Pro costs $12 per user per month
  • Enterprise features such as custom roles and data loss prevention require that plan
Our verdict

1Password stores passwords, passkeys, payment details, secure notes, and other sensitive information in encrypted vaults. Individuals get password generation, autosave and autofill, secure item sharing, unlimited devices, and Watchtower…

Read the review →

Grammarly helps individuals, professionals, teams, and educational users improve writing across browsers, desktop applications, mobile apps, and Grammarly Docs. It checks grammar, spelling, punctuation, clarity, fluency, and tone, and can…

Read the review →
  1. 1PasswordExtensions 9.0From $2.99/user/mo (annual) · 14-day trial
  2. GrammarlyExtensions 6.3Free plan · paid from $12/user/mo

Strengths and trade-offs

  • 1Password — where it wins

    • Autofill, passkey storage, and Watchtower alerts across major platforms
    • Secure item and vault sharing, with unlimited devices on Individual
    • Business plans add role-based controls and identity-provider integrations

    Where it doesn't

    • No free plan; Individual starts at $2.99 per user per month billed annually
    • Teams Starter Pack is priced per month, not per user
    • Passkey-based account unlock varies by platform and account state

  • Grammarly — where it wins

    • Checks grammar, spelling, punctuation, clarity, fluency, style, and tone
    • Works across web, desktop, mobile, and apps such as Word and Google Docs
    • Pro adds full-sentence rewrites, detection tools, and more AI prompts

    Where it doesn't

    • Free includes 100 AI prompts per month
    • Pro costs $12 per user per month
    • Enterprise features such as custom roles and data loss prevention require that plan
  • 1Password9.0/10 · From $2.99/user/mo (annual) · 14-day trial

    A cross-platform password manager with personal, family, and business controls.

    Visit 1PasswordFull verdict →
  • Grammarly6.3/10 · Free plan · paid from $12/user/mo

    A cross-platform writing assistant, with deeper rewrites and detection in Pro.

    Visit GrammarlyFull verdict →

More comparisons

All extensions comparisons → · Full ranking →

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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update