Create high-quality, custom voice experiences
Transform how you engage with your customers through natural, dynamic voice experiences. Powered by 30+ years of voice expertise, FreeClimb Voice API empowers businesses to cut operational costs and drive up CSAT with advanced features like unparalleled speech recognition, intelligent call routing, customizable IVRs, and answer machine detection.
Unlock powerful, out-of-the-box features
Integrate real-time voice capabilities into your existing platform using a powerful toolkit of trusted communications solutions and advanced SIP functionality.
Advanced Call Control
Programmatically make, receive, and manage voice calls with adaptive routing, call transfers, and bridging. Automatically record and store each call with built-in PII redaction for privacy and compliance.
Custom IVR
Build a custom interactive voice response (IVR) system that intelligently routes calls via voice or DTMF input, streamlining the customer experience and reducing operational costs.
Conference Calling
Quickly set up and manage multi-party calls with high-quality audio streaming, complete with controls for muting, recording, and whisper.
Answering Machine Detection
Our system differentiates between human and machine responses, ensuring important messages are delivered directly to the recipient.
Speech-to-Text
Accurately transcribe every caller's voice and receive both the text and call recording in one seamless package. Transcriptions can be easily sent to a specified URL for storage, QA, or training.
Text-to-Speech
Convert text into natural, human-like speech with a library of 50+ voices in 17 languages. Empower automated voice communications, including notifications, alerts, and announcements.
Audio Streaming
Play customized audio files for call greetings, scripts, and notifications. Enhance customer interactions with real-time conversational intelligence, delivering dynamic, on-demand responses during calls.
WebRTC Click-to-Call
Allow customers to connect with you directly from a common web browser with a single click — no additional plugins, downloads, or dialers required.
Call Queue
Improve user support by placing incoming callers in a virtual queue, ensuring each query is handled in the order received, reducing wait times, driving efficiency, and improving customer satisfaction.
Voice Survey
Collect valuable, post-call customer feedback with custom, voice-activated surveys, making customers feel heard while empowering continuous improvement for your business.
The FreeClimb advantage
Gain a competitive edge with a platform built for performance and scalability.
High-fidelity voice calling
Through direct, Tier-1 interconnects, the FreeClimb platform ensures every call is delivered the first time with crystal-clear call quality and minimal latency.
Enterprise-grade reliability
Always count on service availability, even in an outage. Our platform is backed by a 24/7, U.S. based NOC and a geo-redundant, fault-tolerant software architecture, guaranteeing 99.999% uptime.
Expand your reach
Easily purchase local (10DLC), toll-free, and short code numbers from our vetted inventory, or port your own without service disruption. Choose your preferred area code to establish a local presence or keep your current numbers when moving to a new location.
Ironclad compliance and security
Efficiently maintain the highest levels of compliance and security. FreeClimb is HIPAA-Compliant and Level 1 PCI DSS (Payment Card Industry Data Security Standard) certified.
How does FreeClimb Voice API work?
FreeClimb’s cloud-based Voice API enables businesses and developers to manage inbound and outbound voice calls via standard HTTPS requests and secure endpoints, eliminating the need for costly telecom hardware or reliance on legacy Public Switched Telephone Networks (PSTN).
Provision numbers
Purchase or port local, mobile, or toll-free numbers directly from your dashboard or via the API.
Customize your call flows
Make, manage, and configure call flows using FreeClimb’s robust REST API or PerCL commands.
Monitor and manage
Review historical calls and debug applications as needed using detailed webhook logging.
Built for easy integration
Make your first phone call in minutes with our comprehensive documentation and how-to guides. Our modular API stack is designed for seamless integration, enabling you to quickly add voice functionality into your applications with a few lines of code.
Faster Development: Cut coding time in half with our SDK libraries and quickstarts, available in your preferred programming languages, including Node.js, Java, Ruby, Python, and C#.
Real-Time Monitoring: Stay on top of call activity with detailed webhook logging, allowing you to track and manage call statuses and history.
Dedicated Support: Get direct access to engineering support whenever you need help with integration or troubleshooting.
Streamline payment collection with your own pay-by-phone IVR system
Easily create a robust IVR system that allows customers to make secure payments over the phone, 24/7/365, without the need for agent involvement.
Enhance security with our built-in privacy mode that redacts sensitive information using PCI-compliant processing.
Automatically send post-call payment confirmation via SMS to provide customers with peace of mind.
Contain more calls and cut down on operator handling costs.
Save on every call
Customers typically save 30-40% per call by switching to FreeClimb. With local voice calls starting at just $0.0055/minute, you’ll benefit from the best value in the industry.
Free features
Get conferencing, answer machine detection, and speech recognition at no additional cost
Best value
Pay only for what you use with pay-as-you-go pricing
Save as you grow
Get automatic volume-based discounts as you scale
Sign up for free and start building
Request a free trial account to start using our Voice API, or get in touch with one of our experts to learn more about our industry-leading solutions.