Overview

OneSky is a localization platform for app and game teams that need to coordinate translation work alongside technical checks. It is best suited to teams managing recurring, multi-language releases; its combination of workflow tools, translator access and device testing is useful, though the advertised starting rates are not a reliable guide to a project’s total cost.

Key features

OneSky automates localization workflows and lets customers communicate directly with its translators during projects. Translation memory and glossary management can support consistency across repeat work, while context screenshots give translators visual context for the text. These tools suit teams coordinating ongoing localization better than someone who needs only an isolated text translation.

Automated validation checks translated text for missing placeholders. That matters when strings contain variables required by an app or game, though this check does not replace broader review. OneSky supports more than 70 languages and formats including Android XML, Apple strings, CSV, JSON, HTML, gettext, Microsoft Office formats, YAML, XLIFF, TMX and Unity TXT. Its integrations include iOS, Android, the Apple App Store, Google Play Store and APIs. In-game delivery is by files.

For app localization, OneSky offers access to more than 1,000 professional translators across over 50 languages. Testing on actual devices helps teams check how localized interfaces appear in use. The service says its servers run on AWS, with PCI DSS and ISO 27001 compliance; it uses SSL/TLS for private data exchange, PCI-compliant payment partners and does not store card credentials. Operations staff access private projects only when needed for support or project management under role-based controls.

Pricing

OneSky has a free plan at 0.00 USD per free, with no credit card required. It is the no-cost starting point, but no quota or seat allowance is stated, so teams should not assume it covers a particular workload.

The paid options show starting prices billed monthly: AI-Driven Quality Estimation is 0.01 USD per month for AI-powered localization and quality estimation; Multi-agent Translation is 0.01 USD per month for AI-powered localization and multi-agent translation; Review is 0.04 USD per month with no minimum order; and Translation is 0.05 USD per month for professional human translation. Review’s no-minimum-order term may suit occasional work, while the Translation option is aimed at teams seeking human translation. These are starting rates, not a fixed total for a localization project; no seat or usage quotas are stated.

Platforms

OneSky supports Android, iOS, web and API workflows. Its range of integrations and file formats is helpful for teams shipping across those environments, though the platform list does not include desktop operating systems.

Who it's for

OneSky is a strong fit for app and game teams that need to manage translation across languages, keep terminology consistent and check localized interfaces on actual devices. It is less compelling for a one-off translation need or a team that does not need workflow coordination, human translator access or localization testing.

Pros and cons

Pros: Placeholder validation can catch a specific technical risk in translated strings before release.
Pros: Translation memory, glossary management and screenshots serve repeat work where consistency and context matter.
Pros: Professional translator access and actual-device testing address both language production and interface fit.
Cons: The paid amounts are starting prices, so they do not establish the cost of a real project.

Alternatives

Localizely is worth considering for a small hosted-string project: its free plan includes 250 hosted string keys, one project, unlimited users and languages, and it supports Linux, macOS and Windows as well as API and web. Choose locize if its free allowance of 2,000 words, two languages, five namespaces, one user and 100K standard CDN downloads per month fits your needs; its platform coverage includes Android, iOS, web and API.

Tolgee offers a free plan with 30,000 words, three seats, standard localization features, automation and machine translation, and may suit a team looking for those stated allowances. Consider Weblate if self-hosting is important; it supports self-hosted use and also offers a Premium Cloud 10k plan at 47.00 EUR per month for 10,000 hosted strings and unlimited languages, projects and components. TextUnited may fit a web/API workflow built around word and document quotas: its free plan includes 15,000 words per month, 15 PDF pages per month and one user.

wxrks (formerly Bureau Works) is another freemium option, with its free plan specifying yearly word, API-call, AI-token and machine-translation allowances. Localazy may suit projects organized around source keys: its free plan includes 200 source keys, unlimited seats and languages, and it supports API access.

Compare the broader translation management software, game localization software and translation software directories if you want to consider more options.

Verdict

Choose OneSky if your app or game team needs an ongoing localization workflow that brings translator communication, placeholder checks and device testing together. Its breadth is the main reason to pick it; look elsewhere if you need a clearly defined free quota or a predictable project price before getting started.

	Localizer	OneSky
Free plan	No	Yes
Free trial	Yes	No
Paid from	$35/mo	$0.01/mo
Open source	No	No
Platforms	api, Web	Android, api, iOS, Web
Free plan	Yes	Yes
Paid from	35 /mo	—
Website translation	Yes	—
Glossary tools	Yes	—
API access	Yes	—
Supported languages	5	—
Translation memory	—	Yes

Localizer vs OneSky

Localizer

OneSky