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Building agents

All agents created on Bolna undergo internal compliance and safety checks.If you see a message such as “Agent is restricted due to disallowed content. Please review and update it.”, it means your agent’s configuration or prompt may have triggered a violation of Bolna’s content safety policies.Disallowed content includes (but is not limited to):
  • Political campaigns
  • Illegal activities or solicitation
  • Scam or fraud-related behavior
  • Profanity or hate speech
  • NSFW, adult, or sexually explicit content
  • Harmful or misleading information
To resolve this, please review and modify your agent’s prompt, instructions, or behavior to ensure it adheres to a valid use-case. Once updated, you can re-save the agent to re-trigger validation.
Bolna supports a wide range of customizable voice agents. From free-flowing conversational assistants to structured IVR-style bots.You can build agents for use cases like lead qualification, customer support, interviews, appointment bookings, call transfers, and more.Get started with our Agent template library or explore the Agent Studio setup guide.
Yes. Bolna supports multiple languages and voices. You can create agents in various languages (e.g., English, Hindi) using built-in multilingual support across speech-to-text, LLM, and text-to-speech components.Find the list of all supported languages and learn how to write prompts for multilingual agents.
Yes, definitely. Bolna AI is an API-first platform providing a comprehensive API suite to:

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Pricing and concurrency

Bolna offers transparent usage-based pricing:
  • Call pricing: $0.02/min platform fee (plus provider charges).
Please refer to the cost & pricing documentation for detailed information. For high-volume usage, explore our Enterprise Plan with customized volume-based discounts.
Your flat rate only covers a specific set of preferred ASR, LLM, and TTS models. If your agent uses a model outside that list, that component is billed separately at variable, usage-based rates instead of being included in the flat rate.Check the Add Funds panel (click the + next to your wallet balance in Agent Studio) for the current preferred model list, or see the Preferred models documentation for the full breakdown.
By default, Bolna allows up to 10 concurrent calls for paid users. Learn more about outbound calling concurrency or request higher limits via the Enterprise Plan for large-scale deployments and batch calling capabilities.

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Phone numbers and telephony

Yes. You can either:
  • Buy phone numbers directly from the Bolna Dashboard.
  • Use your own telephony account (e.g., Twilio or Plivo) to connect and use your own managed dedicated phone numbers.
No - Phone numbers purchased on Bolna can only be used with Bolna Voice AI agents.
Absolutely. Bolna integrates seamlessly with third-party telephony providers like Twilio and Plivo, allowing you to use your own account and phone numbers.
Yes. You can bring your own SIP trunk to Bolna and use your existing SIP carrier and phone numbers for inbound and outbound calls. See Connect your carrier to get started.You can also use Twilio, Plivo, Exotel or Vobiz for telephony.

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Account, team and deployment

Yes. The platform supports shared access where you can add your team (developers, operators, analysts, etc.) to collaborate within the Bolna dashboard. APIs also allow scoped access through sub‑accounts.
Yes. Bolna supports multiple sub-accounts, designed for enterprise-level teams to isolate projects, billing, and permissions—fully manageable via the API.
Yes - Bolna AI supports on-premise deployments.You can run the complete Bolna platform on your own infrastructure (e.g., private cloud or on-premise servers) instead of the hosted Bolna service.
On-premise is available only for enterprise customers. Please reach out to us at enterprise@bolna.ai or schedule a call https://www.bolna.ai/book-demo for more information.