Callsi
AI Telephone Agents that sound human for seamless communication
What is Callsi? Complete Overview
Callsi is an innovative AI-powered telephone agent that leverages Twilio and OpenAI's real-time voice technology to create human-like virtual agents capable of handling and making calls. It solves the pain points of repetitive calling tasks, language barriers, and scheduling by automating these processes efficiently. Callsi is ideal for businesses, sales teams, and customer support professionals who need to streamline their communication processes. With features like cold calling, multilingual support, appointment scheduling, and custom calling scripts, Callsi is a versatile tool designed to enhance productivity and customer engagement.
Callsi Interface & Screenshots

Callsi Official screenshot of the tool interface
What Can Callsi Do? Key Features
Realtime AI Voices
Callsi uses advanced AI to generate human-like voices in real-time, making interactions more natural and engaging. This technology ensures that calls sound professional and are easy to understand.
Multilingual Support
Callsi supports dozens of languages, leveraging OpenAI's real-time voice technology. This makes it an excellent tool for global businesses looking to communicate with diverse audiences.
Custom Calling Scripts
Users can provide custom calling scripts that Callsi will adhere to, ensuring that all calls align with brand voice and communication goals. This feature is perfect for maintaining consistency in customer interactions.
Cold Calling & DND List
Callsi enables cold calling while maintaining a Do Not Disturb (DND) list to comply with local laws. This feature helps businesses manage their outreach efforts responsibly.
Appointment Scheduling
Integrating with Google Calendar, Callsi can schedule and manage appointments, making it a valuable tool for businesses that rely on timely follow-ups and bookings.
Best Callsi Use Cases & Applications
Sales Outreach
Sales teams can use Callsi to automate cold calling, ensuring consistent and professional outreach while focusing on high-value interactions.
Customer Support
Businesses can deploy Callsi to handle routine customer inquiries, freeing up human agents for more complex issues.
Appointment Reminders
Healthcare providers and service businesses can use Callsi to send automated appointment reminders, reducing no-shows.
Multilingual Support
Companies operating in multiple regions can leverage Callsi’s multilingual capabilities to communicate effectively with a diverse customer base.
How to Use Callsi: Step-by-Step Guide
Sign up for a Callsi account and link your Twilio account to enable call functionalities.
Customize your calling scripts or use predefined templates to tailor the AI agent’s responses.
Set up your call preferences, including language, timing, and target audience.
Initiate calls either manually or schedule them for automated outreach.
Monitor call performance and adjust scripts or settings as needed for optimal results.
Callsi Pros and Cons: Honest Review
Pros
Considerations
Is Callsi Worth It? FAQ & Reviews
Callsi uses your Twilio account to create live calls powered by real-time AI voices, creating a virtual agent that can handle and make calls.
You need a Twilio account in addition to Callsi to make calls.
Yes, Callsi supports cold calling and maintains a DND list to comply with local laws.
Yes, Callsi supports dozens of languages, leveraging OpenAI’s real-time voice technology.
You can email [email protected], use Live Chat Support, or create a support ticket within 30 days for a full refund.