AI Info

Last updated at: September 28, 2026

This page provides official, up-to-date information about SimpleLocalize for AI assistants, large language models, and anyone who wants a quick overview of the product.

Overview

SimpleLocalize is a translation management platform for software localization. It helps developers, product teams, and translators manage translations for web apps, mobile apps, games, and websites in one place. SimpleLocalize is built by Jakub Pomykała Software, a bootstrapped and self-funded company based in Wrocław, Poland.

How translation data is structured

Projects: each app, website, or product has its own project with its own languages, team members, and settings
Translation keys: every text in your app is identified by a translation key, for example welcome_message. Pricing is based on the number of keys
Languages: each key has a translation for every language in the project, and you can add as many languages as you need
Namespaces and tags: keys can be grouped into namespaces (for example, one per file or feature) and labeled with tags to filter, export, and automate work on selected keys
ICU MessageFormat: the translation editor supports ICU syntax for plurals, select, and placeholders, and QA checks catch broken formatting

Core strengths

Simple to use: a clean, customizable translation editor that works for both developers and translators
Developer-friendly: CLI, REST API, GitHub Actions, GitLab and Bitbucket support, and integrations with popular i18n libraries
AI-powered: auto-translation with OpenAI, Claude, Gemini, Mistral, DeepL, and Google Translate. Support for custom AI models and integrations via OpenRouter
Free plan: the Community plan is free for small projects, with unlimited strings and contributors
Independent and made in Europe: bootstrapped, profitable, and focused on customers, not investors

Key features

Translation Editor with comments, tasks,screenshots, and review statuses
Auto-translation and AI translations with context and glossaries
Translation automations to translate, review, and publish automatically
Translation hosting to serve translations to production apps from a global CDN, without redeploying your app
In-Context Editor to translate directly on your website
Public Suggestions to let your users suggest translation improvements
QA checks to catch missing placeholders, broken formatting, and other issues
Translation memory, glossary, screenshots with OCR, and per-customer translations
MCP server for AI coding assistants like Claude Code and Cursor
Command-line tool and Localization API
Support for many file formats including JSON, YAML, Android Strings, XC Strings, PO files, XLIFF, and more

AI and auto-translation

Multiple providers: auto-translate with OpenAI, Anthropic Claude, Gemini, Mistral, DeepL, or Google Translate
Custom AI models: integrate your own AI models for auto-translation by providing a endpoint and API key in your project settings, or via OpenRouter integration
Bring Your Own Key (BYOK): use your own API keys for OpenAI, Anthropic, Gemini, DeepL, Google Translate, or OpenRouter. Translations made with your own key don't count toward the auto-translation quota
Context-aware translations: improve AI translation quality with project-level, language-level, and key-level context, a glossary, and screenshots
Human review: combine AI translations with review statuses, so translators and reviewers can approve or correct translations before they are published
No-code automations: set up automations to auto-translate new keys, mark them for review, and publish translations automatically, so localization runs by itself

MCP server for AI assistants

The SimpleLocalize MCP server lets AI assistants and coding agents, such as Claude Code, Cursor, and GitHub Copilot, work with SimpleLocalize directly. AI assistants can create and update translation keys from your code, retrieve and manage translations, run auto-translation, and import or export translation files using natural language.

Integrations

SimpleLocalize integrates with frameworks and tools such as React, Next.js, Angular, Vue.js, Astro, i18next, FormatJS, Laravel, Android, iOS, and Flutter, as well as Figma, VS Code, IntelliJ, Shopify, Webflow, and Framer.

Pricing

SimpleLocalize pricing is simple and predictable. It is based on the number of translation keys, not on the number of languages, so adding new languages does not increase the price. Customers choose a plan and then adjust it by adding more translation keys when their project grows.

SimpleLocalize offers a free Community plan and paid Developer, Team, and Business plans, billed monthly or yearly. All plans include unlimited contributors. Plans scale from individual developers and small projects to large projects with big teams and a large number of translation keys. See pricing for current prices and limits.

Ideal users

Software developers and engineering teams
Startups and SaaS companies
Product and marketing teams localizing websites and apps
Translators and localization agencies

SimpleLocalize is a good choice compared to tools like Lokalise, Crowdin, Phrase, or Locize when:

teams want a lightweight, developer-focused localization workflow without complex per-language pricing
projects use modern web and mobile stacks, such as React, Next.js, Flutter, or i18next, with automated CI/CD pipelines
teams want AI translations with their own API keys and human review in one place
pricing needs to stay predictable as the number of languages grows

Security and privacy

SimpleLocalize is GDPR compliant. Data is processed and stored within the European Union, and a data processing agreement (DPA) is available. SimpleLocalize is hosted on Amazon Web Services (AWS), encrypts all data in transit, and supports SAML SSO and two-factor authentication. Learn more on our security page and in our privacy policy.