Deliver beautiful, performant external apps without limitations

Easily create customer portals and other external-facing apps that drive user happiness, customer loyalty, and revenue. Deliver the perfect experience and perfect reliability that customer-facing applications require—and do it faster than ever with low-code. See why OutSystems is recognized as the highest-rated low-code vendor for external-facing applications by Gartner.

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Build better external apps

Faster, easier, and more securely with low-code

Meet your users where they are with easy-to-use, performant apps fully customized to their needs.

An extensive library of pre-built UI components makes creating complex apps quick and simple.

Inject custom code where needed.

Create personalized experiences that adjust to user preferences, behaviors, and interactions.

Build, automate, test, and deploy your app to any device.

Modern, end-to-end security is woven into every aspect of the platform and its applications.

Deliver app updates without interrupting the user experience—no downtime required.

Build event-based apps that are designed to avoid bottlenecks and disruption by default.

Be ready for anything with top-tier performance in any situation, no matter how many users your app has or how quickly usage spikes.

Modern, end-to-end security is woven into every aspect of the platform and its applications.

Eliminate manual effort and improve user experience with automatic security patching and no downtime.

Build secure mobile apps by unifying CI/CD tools with app shielding features that scale as your user base grows.

Easily and securely connect applications with your infrastructure—on-premises, in private, or public cloud—through the OutSystems Private Gateway.

Use AI to address potential security issues during development with OutSystems Mentor.

Provide a superior app experience by combining multiple complex data sources into a unified environment.

Complex data, simple visualizations—beat data chaos with a clean UX that delights users.

Leave the time-consuming data integration work to us. OutSystems enables devs to quickly and easily add any data sources into your application.

Put everything your users want into one place.

Easily adjust integrations as business requirements change.

(Just some of) what you can build with OutSystems

Customer portals

With a customer web portal or mobile app, you can create a seamless onboarding or self-service experience (and much more). With OutSystems, you can use a single web and mobile development platform and reuse UI components, business logic, and databases to create consistent experiences across all touchpoints.

Vendor management

Easily work with various vendors by building apps that streamline key processes. Create apps that can scale regardless of vendor or project.

Partner portals

Run your business more efficiently while quickly responding to your partners' needs with a platform that makes change easy and safe.

Customer success stories

Learn about how companies around the world are improving the customer experience and driving brand loyalty.

80

digital products successfully delivered

Fidelidade goes from a broken IT ecosystem to a digital innovator

How Fidelidade is staying agile even after seven mergers, always keeping customer experience at the forefront while reducing technical debt.

Read the Fidelidade story

15%

increase in NPS score

Entel's Developer Digital Factory Delivers Customer-Centric Agility

Entel’s OutSystems factory enabled them to reimagine the customer journey, with the company’s flagship app being downloaded over 10 million times with a 75% NPS score.

Read the Entel story

$1M

in development savings

Oakland Delivers Digital Services for Residents to Save $1 Million

The City of Oakland is using OutSystems to deliver 8 apps in 12 months, including a SSO portal that’s democratizing city services and giving residents greater visibility than ever.

Read the City of Oakland story

OutSystems is the #1 low-code platform for external applications

When looking for the best tool to build applications for your customers, partners, or vendors, you’ve got options. However, when it comes to delivering the perfect UX that users expect in a fast, secure, and scalable way, low-code is the best choice. While other low-code vendors might claim to get the job done, they don’t give you the control you need to tailor your applications to your exact use case. OutSystems gives you the flexibility and resilience you need to deliver market-leading applications.

But don’t take our word for it, just ask Gartner

What else can you build with OutSystems?

Powerful internal applications

Build internal apps quickly and easily, helping your employees work smarter while avoiding shadow IT.

Learn more

Critical core systems

Make sure your most vital systems never go down by building them on the most secure, stable platform.

Learn more

More use cases

Relevant resources

Report

Solving Customer Apps and Portals Challenges with Low-Code

Create pixel-perfect customer portals and apps to improve customer experience, and learn how low-code can help overcome app challenges. Download the eBook now.

eBook

How to Create Omnichannel Experiences Easier and Faster

Learn how to create effortless customer experiences that exceed customer expectations and increase loyalty.

Report

Développer des services financiers numériques grâce au Low-Code

Comment le secteur des services financiers exploite la puissance des plateformes Low-Code.

External applications FAQs

An external app is any application that is designed for a user who isn’t an employee. Most commonly, external-facing applications are for customers, but they can also be built for agents, partners, or vendors.

OutSystems lets you build any external application you wish—from mobile banking portals to virtual care portals, customer self service portals, and more. There are no limitations to what you can build in OutSystems, making it possible to build a fully custom application that meets all of your users’ needs, but more quickly and easily than you could with traditional development.

Both the internal processes of OutSystems and the OutSystems low-code application platform are certified in a wide range of industry-standards, including GDPR, HIPAA, ISO 27001, PCI DSS, SOC 2, and many more. Beyond key certifications, OutSystems employs best-in-class protection from SQL injection and XSS with an industry-leading web application firewall, utilizes a Content Delivery Network (CDN) to prevent DDoS attacks, and features continuous automated intrusion detection. OutSystems also lets you maintain full control over who can build apps, who can access them, and how they can be used, while also adding a layer of protection to prevent deliberate or unintentional data loss, data breaches, and unauthorized data use.

The OutSystems AI-powered low-code platform has built-in capabilities and automation that significantly reduces the time-consuming effort of integrating applications with external databases, systems, and software. Integrations with Microsoft SQL Server and Oracle are just a few of the Relational Database Management Systems (RDBMS) that come built-in, as well as easy integration with REST APIs out-of-the-box.

Low-code development lets development teams build intuitive and convenient apps and customer web portals for consumers, agents, and partners faster than ever. With pre-built UIs, integrations, and security baked in at the platform level, low-code is an efficient, safe way to build external facing applications.

OutSystems Developer Cloud (ODC) has a cloud-native infrastructure that provides a modular, scalable environment built to meet any level of demand. To ensure optimal end-user experience, ODC's auto-scaling capabilities work to meet unpredictable load volumes and ensure no downtime.

OutSystems offers a base UI that is customizable to meet your styling and branding needs. From the colors, typography, structure, and more, you can adjust the look and feel to create a delightful end-user experience. With the option to inject custom code where needed, any app can be customized to fit a specific use case.

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Deliver beautiful, performant external apps without limitations

Build better external apps

Pixel-perfect UX

Resilience baked in

Enterprise-grade security

Many data sources, one experience