Ten years ago, TELZ started with a simple mission: make international phone calls genuinely affordable and easy—without contracts, subscriptions, or confusing fees. That mission still defines TELZ today, and in 2025 we’re proud to celebrate 10 years since TELZ launched (March 19, 2015).

Built in Finland, used worldwide

TELZ is developed by Nettia Oy and is based in Helsinki, Finland. From Finland to the rest of the world, TELZ has grown into an app used by travelers, expats, students, and global businesses—especially when a regular mobile plan would mean high roaming charges or expensive international minutes.

What TELZ does (and why people stick with it)

TELZ is designed to make international calls feel as simple as local ones—while keeping costs predictable. The app shows transparent rates and supports a range of practical features for real-world connectivity.

Core features

• Low, transparent rates to 200+ countries with pricing shown before you call
• HD-quality VoIP calls over Wi-Fi or mobile data
• Call any mobile or landline—the receiver doesn’t need the app
• Callback mode for unreliable internet connections
• Call recording and detailed call history for easy reference
• Secure top-ups and easy credit management
• 24/7 customer support

10 years of TELZ: a quick timeline

• March 19, 2015: TELZ launches.
• 2015–2025: The app evolves through ongoing releases focused on call quality and the user experience.
• Today: TELZ supports international calling to 200+ countries and includes callback and call recording.

Why TELZ still matters in 2025

International communication is “solved” only until you travel, switch SIMs, or need to call a landline abroad. TELZ stays relevant because it focuses on the moments when you need a dependable call: reaching family members on landlines, calling in urgent situations, or speaking clearly while on the move.

The combination of VoIP when your connection is strong and callback when it isn’t is built for real life—not best-case conditions.

How to get started with TELZ (in 3 steps)

1. Download TELZ on iOS or Android.
2. Create an account and claim any available trial minutes/free first calls.
3. Add credits securely, then call any mobile or landline worldwide.

Looking ahead: the next 10 years

TELZ has proven something important: in a world full of trends, there’s still huge value in a product that does one essential thing exceptionally well—helping people connect across borders clearly and affordably. As TELZ enters its next decade, the focus remains: better call quality, smarter connectivity options, and a smoother experience everywhere you go.