Best SIP Trunk Providers in Germany

Twilio's Elastic SIP Trunking provides a robust and scalable solution for businesses looking to modernize their communication infrastructure. By leveraging the Session Initiation Protocol (SIP), Twilio enables seamless voice and multimedia communication over the internet, eliminating the need for traditional circuit-switched lines. With Twilio's SIP Trunking, businesses can quickly set up and manage phone numbers, reducing the time to create a new number from days to seconds. This flexibility is complemented by Twilio's global reach, allowing businesses to connect with customers worldwide with high-quality voice calls. Twilio's platform supports a range of real-time communication services, including voice calls, instant messaging, and multimedia conferences. The standardized nature of Twilio's SIP Trunking simplifies integration, avoiding the complexities associated with legacy carriers.

Squaretalk is a powerful contact center solution that transforms how modern teams connect with prospects and customers, convert sales opportunities, and grow their operations. The combination of AI Voice Agents, calling and WhatsApp Business messaging, AI-powered automation, and affordable scalability ensures that companies of all sizes shorten their sales cycle and elevate outreach without additional complexity or costs. Squaretalk’s platform offers omnichannel communication, powerful call-handling features, automated transcripts, sentiment analysis, contact management, customizable workflows, advanced reporting, and enterprise-grade security. With local numbers in over 150 popular and niche destinations, we enable businesses to establish and maintain a local presence, build trust, and support their global expansion. Discover how Squaretalk’s cloud contact center platform can enhance your team’s connection rates and performance.

Powerful Cloud Telephony for Global Businesses Zadarma offers a feature-rich VoIP platform designed for businesses that want flexibility, scalability, and professional communication without high costs. Set up your cloud PBX in minutes, manage international teams, and serve customers worldwide — all from a single interface. Key features: - Virtual phone numbers in 110+ countries - Free cloud PBX with IVR, call routing, and analytics - Integration with CRMs: HubSpot, Zoho, Bitrix24, and more - Apps for desktop, mobile, and browser-based calling - AI-powered voice agents and call tracking - Full control via web interface and API Ideal for remote teams, support centers, and growing companies looking to modernize their phone systems.

See how the developer friendly Telnyx API can transform your business communications. Telnyx is an all-in-one communication platform designed to be tailored exactly to your needs. We created our network with real-time communications in mind so we can deliver quality calls, messaging, and data around the world. Easily build reliable messaging with our SMS API. Keep your data safe by setting up two-factor authentication using SMS or voice codes. Plug and play your VoIP setup in minutes and get carrier-grade voice with elastic SIP trunks. Our cloud-agnostic approach means you can rest easy knowing you are protecting in case of a network failure. With Telnyx deploy communications exactly to specifications.

Vonage Business is a leading cloud communications platform for businesses of all sizes and industries. Vonage Business covers all the communication needs of organizations looking to succeed, offering more than 40 business-critical features, mobility, conferencing, and integration with top cloud applications. Trusted by more than 500,000 business users, Vonage is available in a number of plans and packages that fit various business requirements.

Hosted VoIP solution with a European focus but with presence in over a 165+ countries. As all our solutions are based on Premium Plus we give you the highest possible quality for the lowest price. All carry all types of numbers, from Geographic to National, TollFree and UIFN, Mobile VoIP, Elastic Pool solutions and much more. We also have our own SoftPhone and will soon be launching other Roaming products too.

Buy toll-free numbers and local phone numbers from more than 160 countries without commitment. You can route incoming calls to any phone, PBX, or SIP worldwide. Our global network has multiple layers of redundancy. Make international outbound calls and show any of your business phone numbers as Caller ID. Connect our SIP trunks to your phone system or use the GCF softphone to make outbound calls. Easily set up and modify smart call routing features like auto-attendant / IVR, location & time-based routing, local ringback tones, simultaneous ring, customized greetings, call recording, voicemail, and more. Easily add or remove virtual numbers, change calling plans, download your invoices and call detail records, modify advanced features, reach live technical support 24/7, and contact your account manager.

Spoke is the leading platform for high-value, complex, and regulated conversations. Spoke guides employees to say and collect the right things so deals move forward and customers get better experiences. Spoke integrates with everything, personalizing conversations, driving productivity, and ensuring compliance. Trusted for over 250,000 conversations every day with features such as calls, SMS, WhatsApp, Team Inbox, programmable routing, Personalized IVRs, caller insights, forms, analytics, +more. The Problem Today, only a small portion of your employees are equipped or have the skills to have highly-contextual, complex, and personalized customer conversations. The Solution Spoke empowers every employee with the information and skills to hold high-quality compliant conversations that drive positive customer and business outcomes.

Ajoxi is a leading provider of wholesale VoIP termination services, dedicated to delivering exceptional connectivity and reliability. Utilizing state-of-the-art equipment and advanced routing technologies, Ajoxi ensures that every call is of the highest quality. Their commitment to excellence is backed by a team of experienced technicians who monitor the network around the clock, 24/7. This proactive approach allows them to swiftly identify and resolve any potential issues, minimizing downtime and ensuring seamless communication for their clients. Whether it's for high-volume call centers or international communication needs, Ajoxi's robust infrastructure is designed to handle the demands of today's fast-paced digital world. Their focus on quality, reliability, and customer satisfaction makes them a trusted partner in the VoIP industry. With Ajoxi, you can expect nothing less than top-tier service and consistent performance that supports your business communication needs.

Connect your entire business with one call. Fusion Connect is your Managed Services Provider tailoring business internet solutions for your SD-WAN, business VoIP, unified communications (UCaaS), internet access, secure networking, and more. Fusion Connect's Business VoIP also features Internet-based faxing, SIP trunking, softphone, and auto attendant functions. Compatible with Windows and Mac, as well as device independent.

Nextiva is an AI-powered Unified Customer Experience Management (Unified-CXM) platform that helps businesses acquire, retain, and grow customers through seamless, personalized interactions. It unifies voice, chat, messaging, social, email, video, and reviews into one platform, eliminating silos and improving collaboration across teams. With patented customer journey orchestration, companies gain real-time insights and automate workflows that improve customer retention while lowering costs. Built-in AI and automation simplify self-service, optimize agent productivity, and deliver measurable efficiency. Nextiva’s workforce engagement tools reduce attrition, boost performance, and connect front-line employees with back-office teams. Trusted by thousands of innovative companies worldwide, and recognized as a Strong Performer in Gartner’s 2025 “Voice of the Customer” CCaaS report, Nextiva is redefining how businesses deliver meaningful customer experiences.

China Telecom (Americas) Corporation (CTA) provides customized, cost-effective and integrated network and communication solutions to its diverse base of customers. As a leading facility-resale private carrier with unique access to providers in Asia and the Americas, we offer a wide range of communication and data center services for multinational customers. CTA is headquartered in Herndon, Virginia, with offices in Chicago, Dallas, Los Angeles, San Jose, Sao Paulo and Toronto. Enterprises throughout the Americas trust CTA’s one-stop, turnkey solutions to meet the challenges of today’s complex business environment.