IoT ontwikkelaar in-lite Coffee IT

Custom (Video) Calling App Development: Limitless Reach for Your Organization

Transform any device into a powerful telephone exchange. At Coffee IT, we develop scalable, secure, and intuitive apps that take corporate communication to a higher level.

What is a (Video) Calling App?

(Video) calling apps are modern applications fundamentally designed with smart VoIP (Voice over Internet Protocol) technology. Instead of using traditional analogue telephone lines or mobile networks, these apps leverage an active internet connection (Wi-Fi, 4G, or 5G).As a modern and popular alternative to traditional trunks, we implement razor-sharp connections via WebRTC (calling directly via the browser or app) or cloud solutions such as Twilio. This allows you to call and video chat effortlessly without requiring a link to the traditional telephone network for 06-numbers. Technically speaking, the app converts your voice and video images into digital data packets. These are sent across the internet at lightning speed and converted back into audio and video at the recipient's end. As a result, users call and video chat with the speed and quality they are accustomed to, but with the full flexibility of software.

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Why Have a Custom (Video) Calling App Built by Coffee IT?

✔️ Security & Compliance as Standard: We build according to the strictest data regulations (ISO 27001 and NEN 7510).
✔️ Significant Cost Savings: International calls and internal team communications are significantly cheaper or completely free.
✔️ No Physical Exchange Required: Save on hardware; the software on your smartphone, tablet, or computer is all you need.
✔️ Rich & Immersive Functionalities: Beyond standard calling, we seamlessly integrate video chat, file transfers, and screen sharing into a single interface.
✔️ Seamless Integrations: We connect the app directly to your existing CRM, ERP, or other enterprise business software.
✔️ Proactive Maintenance: Prevention is better than cure. We continuously monitor systems and deploy immediate security patches, ensuring your communication platform remains online and secure 24/7.

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Your Communication Partner: Our Expertise in Practice


Building a custom application requires deep technical knowledge of latency, data encryption, and user interface design. At Coffee IT, we have a proven track record in realizing complex communication platforms.
For ClearVox, we developed the Nexxt app: a total solution that brings the full functionality of a physical telephone exchange right into the user's pocket. With a core focus on ease of use and seamless connectivity, this application ensures that corporate users remain professionally reachable anytime, anywhere.

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Uitgelicht. Zo veel moois.

Our approach to
custom ERP development

In-house team

We guarantee top-tier quality by employing in-house experts for every discipline, ensuring a specialist is always working on your app. No outsourcing.

Certified

Privacy and security are always our top priorities. We are NEN-7510 and ISO-27001 certified, which means we handle data and confidential information with the utmost care and security.

Agile development process

We work in sprints and hold a retrospective every two weeks. This allows us to process your feedback quickly and achieve the desired results within the planned timeline.

Possibilities of custom ERP apps

A custom ERP app aligns perfectly with your business processes, featuring only the functionality that is relevant to you. Below are some common features:
✔️ User Management and Roles – Grant employees access to specific modules based on their responsibilities.
✔️ Third-party Integrations – Connect with existing accounting software, e-commerce platforms, or other systems.
✔️ Mobile Access – Work from anywhere via a web-based or mobile app, ensuring your employees are always connected to the system.

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Succes for your app
van maintenance to marketing

Realizing a digital dream doesn't stop with developing an app. Even after the release, the members of The Digital Club can take your solution to the next level. The major advantage: all services under one roof.

Accelerator Day Marketing Club

The Marketing Club

An app at the top of the charts; isn't that what everyone wants? The app marketers at The Marketing Club use smart digital marketing to effectively reach your target audience
Accelerator Day Concept Club

The Concept Club

Want to turn your ideas into a roadmap? That’s where The Concept Club comes in. Our dedicated designers and strategists will ensure continuity across all your ongoing projects.
Accelerator Day Data Club

The Data Club

From now on, make only data-driven decisions. The Data Club helps you get started by organizing and analyzing your data.

Frequently Asked Questions

What are the advantages of having a custom (video) calling app built over an off-the-shelf solution?

A custom app for (video) calling offers the unique flexibility of software that is precisely tailored to your business processes. Unlike standard out-of-the-shelf solutions, we build specific, advanced features such as 1-to-many video calls (conferences), smart call forwarding, and background reachability with Critical Alerts (ensuring the app rings for crucial calls even if the device is set to silent or 'Do Not Disturb'). This ensures users call with the speed and quality they expect while simultaneously benefiting from advanced custom CRM integrations.

Can Coffee IT integrate a (video) calling app with other software like Microsoft Teams or Salesforce?

Absolutely. One of the greatest strengths of a custom application is its interoperability. We can configure the app to communicate directly with platforms like Microsoft Teams, Slack, Twilio, or various proprietary CRM systems. This allows employees to immediately view complete customer files on their screens the moment an incoming voice or video call arrives, ensuring maximum efficiency.

Is data security guaranteed within a (video) calling app?

Data security and privacy are our top priorities, especially since voice conversations and video calls contain highly confidential corporate information. Coffee IT is ISO 27001 and NEN 7510 certified, meaning we comply with the strictest international standards for information security. All data, video streams, and audio connections are heavily encrypted (data encryption) via secure protocols, ensuring communication is exclusively accessible to authorized users.

Which technologies and protocols does Coffee IT use for (video) calling integrations?

We master the technology behind digital communication down to the raw source code. Depending on your infrastructure, we work with modern WebRTC solutions or leading communication protocols such as PJSip, MJSip, and PortSIP. Our core expertise within these frameworks is so extensive that we have even engineered a major open-source library for WeAreSpindle. We realize stable, custom-built integrations that consistently meet the highest technical standards within your sector.

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Native apps

Een native app is een applicatie die wordt ontwikkeld met dezelfde programmeertaal en tools als die van de besturingssysteemfabrikant. Zo maken onze Android ontwikkelaars native apps in Kotlin en iOS developers native apps in Swift. Dit resulteert in betere app-prestaties en geeft de app toegang tot alle functies van de smartphone.

Vrijblijvend adviesgesprek

Heb jij hét idee voor een visionOS app? Of wil je meer weten over de mogelijkheden? Plan een vrijblijvend advies gesprek in met onze experts. We nemen we je mee in de wereld van visionOS apps en geven we je concreet advies voor je concept.

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Looking to have a custom app developed? Get in touch with me, I’d be happy to help bring your idea to life!
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