Bolna
Open-source voice AI platform for building and deploying automated phone-call agents
About Bolna
Bolna is an open-source platform for building, testing, and deploying AI voice agents that hold natural phone conversations, handling pauses and interruptions across inbound and outbound calls. The agents answer calls around the clock, book appointments, qualify leads, screen candidates, and provide customer support, with call transcripts and performance analytics. It orchestrates speech-to-text, LLM, and text-to-speech providers over telephony services like Twilio and Plivo, supports 40+ languages including Indian vernaculars, and can run at scale via hosted APIs or self-hosting.
Screenshots
Commonly Cited Strengths & Limitations
Strengths
- Open-source framework with self-hosting option
- Low-code/no-code setup with templates
- Deploys agents in minutes
- BYOK support to reduce per-call costs
- Strong multilingual and Indian-language support with native accents
- Handles high volumes of simultaneous calls
Common Use Cases
- Automating lead qualification for sales teams
- Deploying a 24/7 virtual receptionist / front desk
- Screening job candidates via automated phone interviews
- Multilingual appointment booking
- Routing and handling inbound customer calls
- Customer support automation
Details
- Pricing Model
- Freemium
- Starting Price
- $100
- Founded
- 2024
- Headquarters
- Bengaluru, India
- Category
- Analytics & BI
Key Features
- Natural-sounding voice agentsConducts human-like phone conversations that handle pauses and interruptions.
- Inbound and outbound call handlingAnswers incoming calls and places outgoing calls, including 24/7 coverage.
- Appointment schedulingBooks and manages appointments during calls.
- Lead qualificationScreens and qualifies sales leads over the phone.
- Candidate screeningInterviews and screens job candidates via automated phone calls.
- Batch calling campaignsRuns high-volume outbound calling campaigns to many recipients.
Official Pricing
Bolna's published plans
Starter
$100/one-time
- 1,000 minutes
- Effective ~$0.10/minute
Pilot
$600/one-time
- 10,000 minutes at 6¢/minute
- 20% bonus for 12,000 total minutes
- Effective ~$0.05/minute
Pay-as-you-Go
Contact Sales
- Usage-based pricing
- $0.02/min platform fee plus model/telephony costs (~$0.06/min average)
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