Comparison

Paraglide's compiler approach enables optimizations that are not possible with runtime libraries. Below is a comparison of Paraglide JS with other popular i18n libraries.

If you are looking for a benchmark, check out the interactive benchmark.

[!NOTE] Please open a pull request if the comparison is outdated, incorrect, or can be improved.

Basic Features

Feature	Paraglide JS	i18next	React-Intl/FormatJS
Architecture	🏗️ Compiler	🏃 Runtime	🏃 Runtime
Tree-shaking	✅ Yes	❌ No	❌ No
Bundle Size	✅ Up to 70% smaller via tree-shaking	⚠️ Ships all messages	⚠️ Ships all messages
Type Safety	✅ Yes	🟠 Via workarounds	❌ No
Pluralization	✅ Yes	✅ Yes	✅ Yes
Framework agnostic (React, Svelte, Vue, ...)	✅ Yes	🟠 Wrappers needed	🟠 Wrappers needed
Metaframework agnostic (NextJS, SvelteKit, Astro, ...)	✅ Yes	🟠 Wrappers needed	❌ Only supports plain JS or React (source)

Advanced Features

Feature	Paraglide JS	i18next	React-Intl/FormatJS
Configurable strategies ℹ️	✅ Yes	🟠 Via plugins	❌ No
Localized (i18n) routing	✅ Yes	❌ No	❌ No
Variants ℹ️	✅ Yes	❌ No	❌ No
Multi-tenancy ℹ️	✅ Yes	❌ No	❌ No
Message syntax agnostic ℹ️	✅ Via inlang plugins	✅ Via different backends	❌ Only ICU
Scales well over 15 locales	🟠 Experimental split locale option	✅ Via HTTP backend	❌ No
Component interpolation	❌ Upvote issue #240	🟠 Only for React	🟠 Only for React