Crowdin

What Is Crowdin?

The story of Crowdin begins in Kyiv, Ukraine, in 2008 — two developers needed to translate their own apps and found every available tool either too expensive or too clunky. They built something simpler. By the time Russia's full-scale invasion forced a diaspora of Ukrainian tech talent in 2022, Crowdin had already incorporated as Crowdin OÜ in Tallinn, Estonia, securing its operations and customer data firmly within the EU. What started as a side project is now trusted by over 5,000 companies including Atlassian, Khan Academy, and MEGA.

That trajectory matters because it explains what Crowdin is optimised for. This is not a translation agency wearing software clothing. It is infrastructure for development teams — a localisation layer that plugs into the same CI/CD pipelines, version control systems, and design tools that engineers already use. Translators work in context; developers automate file sync; product managers track progress without Slack pings.

The platform sits in direct competition with Lokalise (also Latvian), Phrase (German), and Transifex (US). Among this peer group, Crowdin distinguishes itself with the deepest CI/CD integration story, a free tier for open-source projects, and ISO 27001:2022 certification obtained as recently as 2021 and renewed under the 2022 standard.

Key Features

Visual In-Context Editor

One of the most persistent problems in software localisation is context collapse: translators see a string like "cancel_confirm_button" with no idea whether it appears in a modal, a settings page, or a mobile action sheet. Crowdin's in-context editor solves this by rendering the actual product UI — a webpage, a mobile app screenshot, a design file — with translatable strings overlaid. Translators click the element they want to translate and edit it within the visual context.

The result is measurably fewer translation errors, fewer review cycles, and faster project completion. Crowdin was among the first cloud localisation platforms to implement this approach at scale, and it remains a genuine differentiator against tools that rely on spreadsheet-style string editors.

CI/CD Workflow Integrations

Crowdin's integration depth with developer toolchains is its most technically substantive differentiator. The platform offers native integrations with GitHub, GitLab, Bitbucket, and Azure DevOps that go beyond simple file upload/download. When a developer pushes a new feature branch, Crowdin can automatically detect new strings, create a translation branch, and notify translators — without any manual intervention. Completed translations merge back through a pull request.

The Crowdin CLI runs in any CI pipeline, allowing localisation tasks to be scripted alongside tests and builds. This means translation can be treated as a first-class step in a release pipeline rather than an afterthought discovered at launch.

Crowdin AI and Machine Translation

Crowdin's AI layer combines multiple machine translation engines — DeepL, Google Translate, Microsoft Translator — with a translation quality scoring system that helps post-editors focus on low-confidence segments first. For projects with large translation memories, Crowdin can pre-translate new content automatically, with quality gates that route segments below a confidence threshold to human review.

The platform also supports MT engine customisation via the Crowdin Apps marketplace, allowing teams to plug in specialised engines for technical domains like legal, medical, or software documentation.

Crowdin Apps Marketplace

The marketplace currently lists over 600 integrations, covering design tools (Figma, Sketch), project management (Jira, Asana), customer support (Zendesk, Salesforce), CMS platforms (WordPress, Contentful), and developer tooling (VS Code, JetBrains). The platform exposes a public API and SDK for building custom apps, meaning enterprise teams with bespoke workflows can extend Crowdin without waiting for a native integration.

Translation Branching

For products with multiple release tracks — a stable version, a beta, and a development branch — Crowdin's branching model mirrors git's structure. Translation branches can be created, merged, and compared independently. This is particularly valuable for software with long release cycles, where strings may change significantly between development and shipping.

Pricing

Crowdin uses a hosted word count model rather than per-seat pricing, which cuts both ways. For small teams with large string volumes, costs can escalate quickly. For large teams translating a limited set of strings, it can be surprisingly affordable.

The Free tier is reserved for open-source projects and includes unlimited strings and projects with no time limit. This is a genuine commitment to the open-source ecosystem, not a crippled trial.

The Team plan starts at $50/month billed monthly, or $40/month on an annual subscription. It includes up to 50,000 hosted words, unlimited projects, and the core integration suite. Most startups and mid-sized product teams will find this sufficient.

The Business plan runs approximately $168/month (monthly billing) or $135/month annually. It unlocks advanced workflow automation, priority support, higher word limits, and the full API. Growing companies processing multiple product localisation streams typically land here.

Enterprise is custom-quoted. It adds unlimited hosted words, dedicated account management, custom workflows, SLA guarantees, and options for advanced data residency configuration.

Annual billing saves approximately 15-20% across paid tiers, and a 14-day trial is available for paid plans without requiring a credit card.

EU Compliance & Privacy

Crowdin's EU compliance story is structurally clean. Crowdin OÜ is incorporated in Tallinn, Estonia — an EU member state with one of Europe's strongest digital governance track records. Customers contract with the Estonian entity, not a US parent or subsidiary. Data is hosted in EU infrastructure.

The company achieved ISO/IEC 27001:2022 certification and has declared 2026 its "Year of Security," launching a dedicated external supply chain security programme focused on translator and vendor access management. Specific capabilities include two-factor authentication, IP allowlists, granular role-based access control, and SSO integration.

A Data Processing Agreement is available for all paid customers. For enterprises with strict data residency requirements, Crowdin can provide hosting configuration documentation confirming EU data location.

One point worth noting: Crowdin does not yet hold SOC 2 Type II certification. Organisations in industries where SOC 2 is a procurement requirement should verify their specific compliance posture with the Crowdin team.

Who It's Best For

Software development teams shipping localised products across multiple languages benefit most from Crowdin. The CI/CD integrations, branching model, and translation memory are built around iterative release cycles, not one-off document translation projects.

Open-source projects with community translators get the most leverage from the free tier. Projects like MEGA and others have built substantial multilingual communities on Crowdin's public project infrastructure.

EU-regulated organisations that need localisation tooling with verifiable EU data hosting will find Crowdin's Estonian incorporation and ISO 27001 certification straightforward to evaluate.

If the primary use case is over-the-air mobile translation updates, Lokalise has a more developed mobile SDK. If the team is already invested in a Phrase enterprise contract, switching costs may outweigh Crowdin's advantages. But for developer-led localisation workflows starting fresh, Crowdin is one of the two strongest EU-native options available.

The Verdict

Crowdin is a technically serious localisation platform that has grown into a credible enterprise product while maintaining one of the few genuine free tiers in the category. The Estonian incorporation, ISO 27001 certification, and CI/CD-first integration approach give it a compelling argument for European software teams. The word-count pricing model requires careful planning for large-string products, and the SOC 2 gap is worth flagging for enterprise procurement. For most developer teams localising software, it earns a strong recommendation.

Frequently Asked Questions

Is Crowdin GDPR compliant?

Yes. Crowdin OÜ is incorporated in Tallinn, Estonia and fully subject to EU data protection law. The company holds ISO/IEC 27001:2022 certification, offers a Data Processing Agreement, and hosts all customer data in EU infrastructure.

Where is Crowdin data hosted?

Crowdin hosts data in EU data centres. Customers contract with the Estonian entity, ensuring data remains within the European Economic Area without requiring additional transfer mechanisms.

How does Crowdin compare to Lokalise?

Both are EU-headquartered localisation platforms (Crowdin in Estonia, Lokalise in Latvia) with strong developer integrations. Crowdin offers a free open-source tier, deeper CI/CD branching, and a broader marketplace. Lokalise is stronger on over-the-air mobile SDK updates and has no free tier but a cleaner UI for non-technical translators. Pricing models differ: Crowdin charges by hosted word count, Lokalise by project seats.

Does Crowdin have a free plan?

Yes — for open-source projects. The free tier includes unlimited projects and strings with no time limit. Commercial projects require a paid plan starting at $50/month (monthly) or $40/month (annual). A 14-day trial is available for paid plans.

What file formats does Crowdin support?

Crowdin supports 50+ formats including JSON, XLIFF, iOS .strings, Android XML, PO/POT, YAML, CSV, RESX, ARB, PHP arrays, and more. Custom parsers are available on Business and Enterprise plans for proprietary or legacy formats.