Overview

OneSky is a localization platform and translation service for app and game teams managing text across products and languages. It is best for teams that need workflow coordination alongside translation, not just a one-off text conversion. Its combination of translator collaboration and technical checks is useful; the listed starting rates are not a guide to a full project’s cost.

Key features

OneSky automates localization workflows and lets customers communicate with its translators during projects. Translation memory and glossary management support terminology and repeat work, while context screenshots give translators visual reference. Together, these tools suit ongoing app and game localization better than occasional, isolated translation jobs.

Automated validation checks translated strings for missing placeholders, helping catch a technical problem before text reaches an app or game. 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, which may not fit teams expecting another delivery method.

For app localization, OneSky offers access to more than 1,000 professional translators across over 50 languages, as well as testing on actual devices to check localized interfaces. That combination is relevant when layout and presentation matter in addition to translated strings.

OneSky says its infrastructure runs on AWS, with PCI DSS and ISO 27001 compliance, and that SSL/TLS protects private data exchange. Payment partners are PCI-compliant, card credentials are not stored, and operations staff access private projects only when needed for support or project management under role-based controls. These are meaningful safeguards for teams handling private project material, though they do not remove the need to assess a vendor against an organization’s own requirements.

Pricing

OneSky has a free plan at 0.00 USD per free, with no credit card required. The free-plan quotas are not defined in the plan details, so teams should confirm that it covers their workload before relying on it.

Paid options are shown as starting rates per month: AI-Driven Quality Estimation at 0.01 USD per month and Multi-agent Translation at 0.01 USD per month, both billed starting at and offering AI-powered localization with, respectively, quality estimation or multi-agent translation. Review starts at 0.04 USD per month, with no minimum order; Translation starts at 0.05 USD per month and covers professional human translation. These are starting prices, not stated fixed totals, so they are useful as entry points rather than reliable estimates for a project. Teams that need human translation should compare the scope of a quote with their actual volume and language needs.

Platforms

OneSky supports Android, iOS, web and API workflows. Its listed integrations with the mobile platforms and app stores complement that coverage, while the broad file-format support is useful for teams moving localization content through different development pipelines.

Who it's for

OneSky is a strong candidate for app and game teams coordinating recurring localization across multiple languages, especially when they need translator communication, placeholder validation, terminology support and visual context in one workflow. Teams with a one-off translation need, or a project that depends on a firm total price or a specific in-game delivery method, should compare alternatives and confirm the scope before committing.

Pros and cons

Pro: Placeholder validation, translation memory and glossary management address technical and consistency needs that recur in app and game localization.
Pro: Translator communication, context screenshots and on-device testing connect translation work to how localized interfaces appear in practice.
Pro: Support for more than 70 languages and numerous app, game and document formats accommodates varied localization workflows.
Con: The listed paid rates are starting prices, so they do not establish a complete project cost.
Con: Free-plan quotas are not defined, making it harder to judge whether the no-cost option will accommodate a real project.
Con: In-game delivery is by files, which may be a mismatch for teams requiring another delivery approach.

Alternatives

Localizely may suit teams looking for a defined small hosted-string allowance at no cost: its free plan includes 250 hosted string keys, one project, unlimited users and languages, with no credit card needed.

locize is an alternative for teams whose needs fit its stated free allowances of 100K standard CDN downloads per month, 2,000 words, two languages, five namespaces and one user.

Tolgee may fit teams seeking a free plan with 30,000 words, three seats, standard localization features, automation and machine translation.

Weblate is another freemium option; its Premium Cloud 10k plan is 47.00 EUR per month for 10,000 hosted strings and unlimited languages, projects and components.

wxrks (formerly Bureau Works) may suit teams looking for a free annual allowance, including 60K words per year, 2.3K API calls, 300K Stateless AI Tokens and 20K Machine Translation Words.

TextUnited offers a free self-service plan with 15,000 words per month, 15 PDF pages per month and one user, making it a possible fit for a small individual workload.

Applanga is an alternative with a two-week free trial rather than a free plan.

Browse more options in Translation Management Software, Game Localization Software and Translation Software.

Verdict

Choose OneSky if your app or game team needs a coordinated localization workflow with translator access, string validation and support for recurring multilingual work. Its strongest case is the combination of workflow tools and translation services; look elsewhere if you need a clearly bounded free quota, a dependable project total from the starting rates, or a different in-game delivery method.

	OneSky	TranslateX
Free plan	Yes	Yes
Free trial	No	Yes
Paid from	$0.01/mo	$24/mo
Open source	No	No
Platforms	Android, api, iOS, Web	api, extension, self-hosted, Web, Windows
Free plan	Yes	Yes
Translation memory	Yes	Yes
Document translation	—	Yes
Glossary tools	—	Yes
API access	—	Yes
Supported languages	—	20

OneSky vs TranslateX

OneSky

TranslateX