Voice Agents
Build AI agents that talk — standalone calling agents, voice features inside your apps, and voice-powered help desks.
Abacus AI Agent lets you create voice agents: AI assistants that hold natural spoken conversations. Use them as standalone calling agents, embed them into the web apps you build, or stand up an enterprise help & support line — all created the same way as everything else: by describing what you want.
This guide covers:
What You Can Build
- Standalone calling agents — a voice agent with a purpose (answering questions, qualifying leads, taking bookings) that callers can talk to naturally.
- Voice inside your web apps — combine an Abacus-built web app with a voice agent so users can speak to your product, not just click through it.
- Enterprise help & support — a voice front door for your support: answers from your knowledge base, spoken naturally, with escalation when needed.
- Personal companions — supportive, conversational agents for coaching, practice, or day-to-day assistance.
Watch It in Action
An emotional support voice agent:
A web app with a built-in voice agent:
A standalone calling agent:
Core Capabilities
How do I create a calling agent?
Go to https://apps.abacus.ai/, describe your requirements, add documentation, knowledge base and context for the agent and wait for Abacus.AI to build a calling agent for you in minutes.
You can also enable voice capabilities for your previously created chatbots on Abacus by simply prompting in the chatbot creation conversation.
What are the languages supported by the calling agents?
Our calling agents are multilingual. The agent senses the language used by the person on the other side and smoothly adopts to the language as needed.
What is cost for inbound calls? Are there any additional charges?
The cost per minute for call varies significantly on the complexity of your agent but usually it costs ~200 credits per minute for a medium complexity agent. The cost is inclusive of everything, there are no additional charged for the agent.
Can I turn voice on for a chatbot I already built?
Yes, you can. Just ask Abacus AI Agent to create a calling agent through prompting and you will have voice capabilities enabled for your existing chatbot.
How does the agent know about my business? Can I give it my own content?
Yes, you can provide your own content to the Agent either through prompting, file uploads or proving links to your websites.
Can I build calling agents as a Voice support for website built using Abacus?
Yes, you can build voice support for your website built with Abacus AI.
- Open the conversation used to build the particular website, make sure the website is deployed
- Click on tools dropdown on the top right corner on the preview window
- Select support agent and start building your Voice Support
What happens to incoming calls if the account runs out of credits?
Incoming calls will get automatically rejected till the credits are refilled.
Can the agent transfer the call, call someone back, or send a text/email afterwards?
No, we do not support this right now, but these features are coming soon.
Which subscription should I buy in order to build a voice agent?
You need pro tier subscription to build and host a voice agent on Abacus.AI
Phone number & Calling
How do I get a phone number for my agent?
Once you build a voice agent on abacus.ai, you see an option to add a phone number in the conversation — you simply need to click on that, choose a phone number of your choice and it will automatically get connected to your agent once you “Buy & Attach”.
How much does a phone number cost?
The cost of phone number depends on the phone number you choose starting 1150 credits, we provide you a variety of options to choose from as per your needs.
How am I billed for phone number?
Once you buy a phone number, the credits equivalent of monthly cost that was shown to you will be deducted from your Abacus Credits. At the start of every billing cycle you will charged for the phone number if the phone number is being used.
What happens if I want to cancel/delete the phone number i have bought?
If you cancel in the middle of the billing cycle, you will be charged till the end of the current billing cycle. You will not be charged from the next billing cycle.
Which countries can I get a number in?
Currently we only support US phone numbers, but soon other countries will also be supported over time.
Can I use my existing business number / port a number in?
Not right now, coming soon.
How many numbers can one agent have?
Once Calling agent can have maximum of 10 phone numbers.
How do I stop a number, and what's the difference between disabling and deleting it?
You can simply disable or Delete the phone number as per your choice:
- Disable — You continue to own the phone number, its simply detached from your agent. You can re-enable it in future.
- Delete — You no longer own the phone number, its released and might not be available to you in the future.
You will be charged for disabled numbers as you still own them.
Can I control who is allowed to call the agent?
Yes, you either make your calling agent public or add PIN to control who can call and access your agent.
Is any minimum commitment or cancellation charge for the telephone number?
There is no minimum commitment. You will be charged at the start of a monthly billing cycle and if you cancel in between cycles — your billing stops from the upcoming cycle.
Testing & Monitoring
Where can I see who called and what was said?
You can access various conversations and transcripts of the calls made to your calling agent by opening the chatbot the conversation that was used to build the voice agent.
Can I test the agent before letting it call real customers?
Yes, you can simply click on the voice icon in the prompt input box of the chatbot and start testing your agent.
Are calls recorded and transcribed?
We do not record voice but we record the transcripts of the call which you can easily access on the platform.
More advanced analytics is coming soon.
Still Need Help?
If you're still stuck, contact support — we're here for you.