Crowdin is one of the biggest localization platforms on the market — and for many teams it is a great choice. But if you are an indie developer or a small studio, you may be paying for (and clicking through) a lot of enterprise machinery you will never use. Localization.One takes the opposite approach: upload a file, pick languages, let AI translate, download the result.
TL;DR
- Crowdin: a mature enterprise-grade TMS with hundreds of integrations, workflows and roles. Paid plans start at about $59/month, and the pricing grows with seats and projects.
- Localization.One: an AI-first localization platform built for small teams. Free plan with 500 strings, Premium is a flat $19/month per project with unlimited strings and AI credits included. No per-seat pricing — invite as many translators as you want.
Where Crowdin shines
Honest answer first. Crowdin is the safer pick if you need SSO and compliance checklists, dozens of integrations (Figma, Jira, GitLab, marketing tools), complex review workflows with several QA steps, or if you manage tens of projects with dedicated localization managers. None of that is bad — it is just built for a different company size.
Where Localization.One is different
AI translation is the default, not an add-on
Every target language can be translated by AI out of the box, with placeholders (%s, {name}, {{var}}) preserved. You upload a strings file, and minutes later you have a translated project — human review is optional, not a prerequisite. The platform has been running in production for over a year, localizing sites with 120k+ daily visitors.
Flat, predictable pricing
Crowdin's pricing is per seat and per project tier; costs grow as your team grows. Localization.One Premium is $19/month per project — unlimited strings, AI credits included, unlimited collaborators. Solo developers usually fit in the free plan: 500 strings, machine translation and AI quota included.
Simple by design
Categories, strings, translations, an API and webhooks — that is the whole mental model. Your translators do not need a training session to suggest a translation, and you do not need a localization engineer to set up a project.
Free for indie game developers
If you make indie games, you can get Premium for free — in exchange for a small credit link. See Free for indies.
Feature comparison
FeatureLocalization.OneCrowdin
AI / machine translationBuilt-in, on by defaultAvailable, configured per project
File formatsAndroid XML, iOS .strings, Flutter ARB, JSON, PO, Java .properties, CSV, PHP arrays70+ formats
API & webhooksYesYes
Volunteer / community translationYes, public projects with invite linksYes
Per-seat pricingNo — unlimited collaboratorsYes on most plans
Free plan500 strings + MT + AI quotaLimited free tier
Paid plan$19/month per project, unlimited stringsFrom ~$59/month
Enterprise workflows, SSONoYes
Migrating from Crowdin
Export your source and translated files from Crowdin in any common format (JSON, PO, Android XML, iOS .strings, CSV), then upload them at /start/ — the wizard creates the project, imports the strings and starts AI translation for the languages you pick. If you need to convert a file between formats first, use our free converters.
Who should pick what
Pick Crowdin if you are an enterprise with dedicated localization staff, compliance requirements and a big integration surface. Pick Localization.One if you are an indie developer or a small studio that wants translated builds this week, at a price that does not scale against you.