Ship localized experiences for every user in every market

Translation alone doesn't win global users. Testlio’s crowdsourced AI-powered localization testing solution puts in-market testers in front of your product to ensure it delivers culturally relevant experiences to every user wherever they live.

A black and white illustration of a globe on top of a person's finger

Validate your app exactly as customers experience it

Whether you want to check for translation in a specific region, currency formatting, right-to-left layouts, or regional checkout flows, Testlio’s in-market localization testing ensures you get the real-world validation you need to win customers in every market you serve. 

Laptop and Mobile Icon
600k+
Devices
Cash Icon
800+
Payment methods
Globe Icon
150+
Countries
Translate Icon
100+
Languages

Extensive coverage for intuitive experiences

Whether you’re entering a new market, evaluating product fit, or growing your footprint in an existing market, Testlio ensures your testing covers every critical user flow and feature to guarantee success.
Our services include:

Globe Icon

Internationalization (i18n) testing

Validate everything from UI rendering and core app functionality to currency formatting, untranslated strings, and right-to-left language support to determine if your product can be adapted for different markets and languages without code modifications.
Design Icon

Marketing assets localization testing

Verify that every customer touchpoint reflects the language, tone, and visual context of each market. We evaluate static images, video assets, and marketing copy to ensure your storefront, ads, and in-product marketing align with user expectations.
Translate Icon

Linguistic & translation testing

Catch unnatural or literal translations and awkward phrasing that can only be caught in real-world conditions. Testlio’s community evaluates your translated content for accuracy, natural phrasing, idiomatic fit, and consistency across the product.
Diagram showing six diverse people’s portraits placed on concentric dotted circular orbits representing a collaborative network or connection model.

Global testers who know how products fail in your key markets

Testlio’s vetted global community includes fluent native speakers, cultural specialists, and in-country testers who evaluate your product using the devices and payment methods your paying customers use. LeoMatch™, our AI ranking engine, automatically matches the best-fit testers based on product familiarity, location, domain expertise, availability, and performance, ensuring faster ramp-up and market-aligned testing.

A platform that helps you build confidence in global releases

LeoCore™, Testlio’s AI-powered platform, orchestrates testing from end to end, helping you source the right in-market testers (LeoMatch™) and surfacing localization insights, trends, and patterns (LeoInsights™) in real time. You see which languages were covered, which markets were validated, where the gaps are, and why they matter. With built-in integrations across Jira, TestRail, and Slack, your team stays aligned across time zones and release cycles without needing to build new workflows.

Apple iMac and MacBook Pro displaying software interfaces for test planning and user profiles with UI notifications and task assignments.
Four icons showing different testing types: typing on a laptop, hand holding a phone with a refresh symbol, finger pressing a button, and hand holding a phone.

Test every layer of the global experience

From core functionality and regression suites to AI-powered features and complex global payment flows, Testlio’s comprehensive crowdsourced testing solutions help you validate your entire customer journey. Whether you’re launching new product lines in existing regions, entering emerging markets, or adding new features or payment methods, we ensure every release delivers the confidence and experiences users expect from your brand.

The trusted partner to the world’s leading brands

When you work with Testlio, you get a partner that’s as invested in your success as you are. We combine the strengths of our global community, AI-driven platform, and structured execution to help you release localized experiences that win customers and turn them into brand loyalists.

Refresh Icon

End-to-end execution

We own every part of your testing efforts, from recruiting in-market experts and matching them to your product to running cycles across regions and delivering clear, prioritized findings your team can act on.
Lightning Bolt Icon

Market-aligned testing

Every tester is a native speaker who lives in the market they validate. We match by language, region, device, payment context, and product domain, so testing is 24/7, time zone-aligned, and provides faster feedback.Every tester is a native speaker who lives in the market they validate. We match by language, region, device, payment context, and product domain, so testing is 24/7, time zone-aligned, and provides faster feedback.Testing is planned around your sprint and release cycles, giving teams fast, actionable feedback when it is still practical to fix issues.

Built-in security

We are ISO/IEC 27001:2022 certified and follow rigorous data protection protocols across every engagement. Your product and your customers' data stay protected at every stage.
Black and white illustration of a policeman and two dogs

Strategic localization leadership

Your client team works directly with your team to prioritize markets, define coverage needs, and focus testing on the regions and user flows where mistranslation or cultural missteps would cost you the most.
Resize Arrows Icon

Flexible and scalable coverage

Whether you are entering one new market or fifty, we adjust tester staffing, device coverage, and language depth to match your launch plan, your sprint cadence, and the regions your business is moving into next.

Case studies and resources

Blog
Illustration of a person juggling multiple global payment icons including credit cards, mobile wallets, cryptocurrencies, and currency symbols, representing the complexity of cross-border payment ecosystems.||||||||||||

7 QA Blind Spots Hurting Global Reliability

Every QA in global releases tells two stories: the one the teams plan for and the one users experience. And often, those stories don’t match.

Blog
Illustration of online payment

The Unsung Harmony: How Accessibility and Localization Dance Together

Accessibility and localization often seem like separate disciplines, each with its own set of guidelines and goals.

No items found.
Webinar
A webinar promotional graphic featuring three headshots in circular frames: Nicole Kittle Broe (Director of Localization, Roku), Putu Kusumawardhani (Associate Director & Localization Testing Lead, Testlio), and Steve Semelsberger (CEO, Testlio). The Testlio and Roku logos are centered at the bottom against a solid purple background.

Roku’s Strategy for Localization Testing and QA—at Scale

Watch this insightful session with Nicole Kittle Broe, Director of Localization at Roku to learn about the unique challenges of localization testing, Roku's approach, and its broader applications for global market expansion.

Ready to win global markets and accelerate growth?

Frequently asked questions

A black and white illustration of a woman working on a desktop.
How is Testlio’s localization testing solution different from other QA providers?

We combine the reach of a global crowdsourced community with a powerful AI-powered platform to help you release faster and at scale. In-market testers in over 150 countries, intentionally matched to your needs, validate your digital products across the languages, payment methods, and devices your customers rely on. Our global community is highly vetted and trained to find critical localization mistakes that others can’t. A dedicated client team manages scoping, execution, recruiting, and reporting end to end. This ensures consistency, speed, and accountability across every market you validate.

How do you select testers for each market?

LeoMatch™, our AI-powered talent orchestration engine, automatically selects testers by language proficiency, in-country residence, market familiarity, device access, platform expertise, and product domain. Every engagement includes a mix of consistent testers who know your product and fresh testers who bring new market perspectives.

What does your pricing model look like?

Testlio's pricing model is designed to help you get the most out of your partnership with us. It’s built on two factors. A platform fee covers your LeoCore access — tester matching, reporting, integrations, orchestration and your account management team. An annual consumption fund covers the testing work itself. Whether you need quality management, specialized testers, experts in a specific region, or a specific number of testing hours, your consumption fund supports it. What's included in each scales with your package: Essential, Advanced, or Enterprise.

How quickly can we start localization testing with Testlio?

Timelines depend on the number of markets, languages, and platforms in scope. We involve our delivery team early to align on priorities, sequence market coverage, and launch testing cycles as soon as possible.

Can you test in specific markets and languages?

Yes. Our community spans 150+ countries and 100+ languages, with native speakers and in-country testers across every major region. We validate your product in the same languages, payment ecosystems, devices, and regional conditions your customers actually experience.

Do you integrate with our QA and development tools?

Yes. Our LeoCore integrates with tools like Jira, TestRail, and Slack so you can track localization issues, manage cycles, and collaborate across regions without changing your existing processes.

Can you support localization testing for regulated industries?

Yes. Testlio is ISO/IEC 27001:2022 certified and follows strict data protection and access controls, which are important for finance, healthcare, and other regulated products entering new markets with their own compliance requirements.

How do you use AI within your localization testing workflows?

LeoCore, our proprietary AI-powered platform, orchestrates the entire testing process, from test runs and work opportunities to recruitment, execution, and reporting. By automatically surfacing the best-fit testers for each engagement, streamlining onboarding, and learning from historical project data, it removes friction and enhances precision at every step. This means fewer manual tasks, more strategic oversight, and dramatically faster, more scalable delivery.

A black and white illustration of a woman working on a desktop.