Make every
voice interaction count
Real-time voice APIs for AI agents. WebSocket streaming, SIP trunking,
global numbers. Ship voice applications in hours.
For Business Teams
FreJun connects your calls to your CRM. Every conversation is recorded, transcribed, and logged to track team performance.
For Developers
FreJun Teler provides programmable voice infrastructure for developers connecting AI voice bots and agents to end users.
Trusted by leading voice first teams
Two products,
one voice platform
Real-time voice APIs for AI agents. WebSocket streaming, SIP trunking,
global numbers. Ship voice applications in hours.
The dialer that
lives inside your CRM
FreJun integrates with your CRM to handle the complete calling lifecycle: dialing, logging, recording, and analyzing. Explore FreJun
Connect
Native integration with HubSpot, Salesforce,Zoho,
and 15+ CRMs with deep, bi-directional sync.
Call
Native integration with HubSpot, Salesforce, Zoho, and 15+ CRMs with deep, bi-directional sync.
Route
IVR menus and round-robin distribution ensure the right person answers every call.
Analyze
IVR menus and round-robin distribution ensure the right person answers every call.
Build Voice Into
Any Product
Voice infrastructure for your AI applications
FreJun integrates with your CRM to handle the complete calling lifecycle: dialing, logging, recording, and analyzing.
Real-time Media Streaming
Stream audio between phone calls and your application in real-time with <250ms latency. Connect any AI provider or build custom voice logic.
SIP Trunking & Global Numbers
Production-grade telephony infrastructure. Instantly provision numbers in 50+ countries via API. Connect voice platforms, PBX systems, or contact centers via SIP.
Programmable Call Control
Control conversation flow, routing logic, and IVR menus programmatically. We handle carrier complexity, media routing, codec negotiation, and call quality.
“Teler made it incredibly easy for us to add voice capabilities to our product. The APIs are simple, reliable, and the call quality has been excellent even at scale.”
“We were able to integrate voice calling into our workflow in just a few hours using Teler. The documentation and developer experience are top-notch.”
“Before Teler, managing telephony infrastructure was complex and time-consuming. With Teler’s APIs, we can focus on building features instead of worrying about voice infrastructure.”
FreJun Teler for
powering up Developers
Real-time voice APIs for AI agents. WebSocket streaming, SIP
trunking, global numbers. Ship voice applications in hours.
AI Voice Agents
Build conversational AI that makes and receives phone calls. Create appointment schedulers, customer support agents, lead qualification bots, or automated receptionists.
Intelligent IVR Systems
Replace button-press menus with natural language understanding. Route callers based on intent. Reduce wait times and improve customer satisfaction.
Voice-Enabled SaaS
Add click-to-call, call recording, real-time transcription, or voice features directly into your product. Embed telephony without building carrier relationships or infrastructure.
Financial Services & Banking
Build voice-based authentication systems, fraud alerts, payment confirmations, and account management bots. Secure, compliant voice infrastructure for sensitive communications.
E-commerce & Retail
Automate order confirmations, shipping updates, and customer support. Build voice-enabled product search and purchase assistance for hands-free shopping.
Looking to build your Teler competence
for dev teams?
Built secure from
the ground up
Zero data sharing
We never sell, share, monetize, or mine your call data—ever.
API key management
Create, rotate, and restrict API keys with fine-grained controls.
Role-based permissions
Granular access controls that let you define exactly who can view, manage/export data.
SSO/SAML support
Securely integrate with your identity provider for centralized authentication.
Frequently Asked Questions
What is a programmable voice API and how does Teler work?
Teler is a programmable voice API that gives developers direct access to voice calling infrastructure. Unlike traditional voice APIs that hide audio streams, Teler provides real-time audio streaming and programmable voice control for building AI voice agents and custom telephony applications.
How do I integrate voice calling APIs into my application?
Teler’s voice API integration is straightforward: configure Real-time Media streaming for real-time audio, and implement your logic. Our telephony APIs for AI support any provider – OpenAI, Anthropic, ElevenLabs – making it the best voice API for AI voice calling infrastructure.
What are programmable voice agents and how does Teler support them?
Programmable voice agents are AI-powered systems that make and receive phone calls. Teler provides the voice agent infrastructure through our voice agent SDK and voice agent API, handling telephony complexity while you focus on conversation logic and AI voice agents.
Does Teler provide telephony infrastructure for AI and voice workflow engines?
Yes, Teler is built specifically as telephony infrastructure for AI applications. Our voice workflow engine supports AI voice calling infrastructure with audio streaming, media streaming capabilities, and Voice AI APIs that connect to any AI provider for building intelligent voice systems.
What makes Teler the best voice API for real-time voice streaming?
Teler’s real-time voice streaming API delivers audio chunks with <250ms latency through Real-time Media Streaming connections. Our programmable voice platform provides direct audio access and media streaming without the abstractions found in traditional voice agent APIs, making it ideal for Voice AI APIs and real-time applications.
Get started with
Teler today
Real-time voice APIs for AI agents. WebSocket streaming, SIP trunking,
global numbers. Ship voice applications in hours.