📞 The Problem: Rising Communication Costs
In today’s connected economy, communication is key—but it shouldn’t come with a hefty bill. Traditional VoIP systems often come bundled with:
Monthly SIP trunking fees
Per-minute call charges
Complex provisioning workflows
Hidden infrastructure costs
Whether you're a startup building in lean mode or an enterprise scaling fast, these recurring costs can hinder growth, slow down experimentation, and inflate your operating expenses.
💡 The Opentact Solution: Free Peer-to-Peer SIP Calling
Opentact disrupts the conventional model with Free P2P SIP Calling. It lets users and endpoints communicate directly over the internet—without routing calls through traditional telco networks.
With Opentact, every SIP user you create can call another Opentact SIP user completely free, regardless of their location or device. No VoIP carrier in the middle. No extra infrastructure. No cost per minute.
✅ Key Benefits of Free P2P SIP with Opentact
Zero Cost: There are no charges—per minute, per user, or per device. P2P calls between your Opentact SIP users are always free.
Instant Setup: Create SIP users via the dashboard or API in seconds. Provision softphones, apps, or WebRTC clients without delays or manual intervention.
Encrypted & Secure: All SIP signaling is protected using TLS, and media streams use SRTP. Security is built-in from the ground up.
API-Powered Control: Developers can fully manage SIP users, callflows, and routing through REST APIs. Easily integrate into any CRM, mobile app, or internal tool.
Scalable Architecture: From a handful of test users to thousands of endpoints, Opentact can scale without friction. Add, manage, or remove users as needed with no licensing complexity.
🧠 Who Can Benefit?
Developers & SaaS builders adding voice features to apps
Startups looking to offer internal communication without cost
Remote teams needing secure, free voice collaboration
IoT or embedded systems requiring low-cost voice channels
Education platforms enabling tutor-student calling
🔄 How It Works in 5 Simple Steps
Sign up at www.opentact.org
Create SIP users instantly via the dashboard or API
Configure clients like Zoiper, Linphone, or WebRTC-based softphones
Make free calls between any two Opentact SIP users
Monitor activity using Opentact’s real-time logs and dashboards
There are no hardware requirements, no setup delays, and no per-call fees.
🔐 Real-World Use Cases
App-to-App Communication: Let your app users talk securely without involving telecom providers.
Internal Teams: Enable voice between employees globally without increasing your telecom bill.
Remote Support: Use SIP endpoints to troubleshoot IoT devices or on-site tech with secure voice access.
Custom Voice Workflows: Build secure calling into CRMs, dashboards, or internal tools—on your terms.
🆚 Why Choose Opentact Over Traditional VoIP Providers?
Opentact gives you what traditional VoIP often doesn’t:
True zero-cost calling between users
Encrypted, P2P voice communication out of the box
API-driven control for full automation
No dependency on SIP trunks or commercial PBXs
WebRTC support with browser-based voice flows
You don’t need telecom infrastructure or hardware to get started. Just an internet connection and an idea.
🚀 For Developers, Startups & Innovators
If you're building voice apps, launching communication tools, or running a global team—Opentact provides the ideal backend for SIP voice without the budget drain.
Whether you're testing an MVP or building a full-scale product, Free P2P SIP calling removes a major cost barrier and unlocks new opportunities for voice-powered experiences.
🔗 Get Started Now — It's Free
Opentact makes it incredibly easy to deploy real-time SIP communication without paying per minute or per user.
🔗 www.opentact.org No contracts. No monthly plans. Just pure communication!