Getting Real ROI from a Voice AI Free Trial in India

A voice AI free trial in India allows you to test automated conversational agents on live phone calls to evaluate latency, accent recognition, and cost before deploying them to production. Bolti, a voice AI platform for phone agents, offers a 50-minute free trial with no credit card required, followed by a simple ₹6/minute pay-as-you-go pricing model.

What is a voice AI free trial in India and how does it work?

A voice AI free trial in India lets businesses test how automated agents handle real-time phone conversations with local customers. Unlike simple text-to-speech generators that only read scripts, a telephony-grade trial lets you build an interactive agent, connect it to a phone line, and test its responsiveness, accent recognition, and language switching under real network conditions.

Many tools in the market, such as LOVO, ElevenLabs, or Voice.ai, focus primarily on voice generation, text-to-speech (TTS), or voice changing. While these are excellent for video voiceovers or content creation, they are not built for live, two-way phone calls over Indian telecom networks. A true production trial needs to evaluate the entire pipeline: Speech-to-Text (STT), Large Language Models (LLMs), Text-to-Speech (TTS), and Telephony transit. When comparing platforms, businesses often look at Bolna AI or Ringg AI, but a hands-on trial is the only way to verify real-world performance.

When you start a trial with Bolti, you get 50 free minutes to test this complete pipeline. Here is what happens behind the scenes during a trial call:

• Audio Capture: The caller's voice is captured over the public switched telephone network (PSTN) or SIP trunk.
• Transcription (STT): The audio is transcribed into text in real-time. For Indian accents, engines like Fennec or SarvamAI are used to prevent transcription errors.
• Reasoning (LLM): An LLM (like Groq, OpenAI, or Gemini) reads the transcript and decides what to say or which API tools to trigger.
• Voice Synthesis (TTS): The response is converted back into natural speech using high-fidelity voices from providers like Cartesia, ElevenLabs, or SarvamAI.

Why does provider choice matter during your voice AI trial?

Choosing the right providers for STT, LLM, and TTS during your trial directly impacts call latency, voice quality, and per-minute costs. Bolti lets you mix and match different providers per agent rather than locking you into a single monolithic stack, giving you complete control over performance trade-offs.

Every voice call on Bolti is powered by four categories of providers working together, which you can configure in the agent setup wizard's tabs:

• STT (Speech-to-Text): Turns the caller's audio into text. Bolti supports Deepgram (safe default for English), AssemblyAI, Cartesia, ElevenLabs, Azure, and Fennec (highly optimized for Indian languages and regional accents).
• LLM (Large Language Model): The brain of the agent. Bolti supports OpenAI (GPT-4o family), Google Gemini (Gemini 2 Flash and Pro), Groq (Llama-family models served on Groq's accelerators for ultra-low latency), and DeepSeek.
• TTS (Text-to-Speech): Synthesizes the agent's voice. Bolti supports Cartesia (Sonic-3 model), ElevenLabs (Eleven Turbo v2.5), SarvamAI (Anushka and other Indian-language voices), and SmallestAI (Irisha).
• Telephony: Carries the call over PSTN/SIP. You can bring your own carrier (BYOC) or use Bolti-provided numbers.

How can you test a voice AI agent in under 50 minutes?

You can build, configure, and test a fully functional voice AI agent in under 50 minutes by setting up a basic customer support or outbound sales workflow. By using pre-configured templates and selecting native Indian voices, you can run live test calls to your own mobile phone within ten minutes of signing up.

To make the most of your 50 free minutes, follow this step-by-step testing blueprint:

1. Define the Agent's Role and Prompt

Do not start with a complex, multi-step integration. Instead, build a simple agent for one of these common Indian business use cases:

• Payment Reminders: "Namaste, I am calling from [Company Name] regarding your pending invoice of ₹4,500..."
• HR Screening: Ask candidates three basic qualifying questions about their experience, notice period, and CTC expectations.
• Lead Qualification: Call warm leads to confirm their interest in a real estate property or financial product.

2. Choose the Right Voice and Language

Navigate to the Voice tab in the Bolti dashboard. You will see a grid of voice cards displaying names (like Aria, Marcus, Anushka, or Irisha), gender badges, languages, and characteristics (e.g., warm, professional, energetic).

• Click the ▶ play button on any card to stream a 3-second preview in its native language.
• For English-only agents, choose low-latency providers like Cartesia (Blake, Daniela) or ultra-realistic voices from ElevenLabs.
• For Hindi or bilingual calls, select SarvamAI (Anushka) or SmallestAI (Irisha) to ensure natural pronunciation and correct phrasing.

3. Configure the Tech Stack for Low Latency

Every voice agent is a combination of four distinct providers. To minimize delay, configure your agent's settings using these recommended combinations in the Speech and LLM tabs:

• For English Calls: Use Deepgram for STT, Groq (Llama-family) for the LLM, and Cartesia for TTS. This setup consistently achieves sub-second turn-taking.
• For Hindi and Indic Calls: Use Fennec for STT (optimized for Indian accents and mixed English-Hindi speech) and SarvamAI for TTS.

How does data residency work for Indian voice AI trials?

Data residency determines where your customers' call recordings, transcripts, and metadata are physically stored. Bolti's managed cloud runs on E2E Networks infrastructure in India, ensuring your application data and recordings remain within the country to align with DPDP Act guidelines.

During your trial and production campaigns, Bolti stores and manages four classes of data:

• Application data: Agents, tools, members, phone-number assignments, billing records, and call metadata are stored in AWS RDS PostgreSQL databases in India (ap-south).
• Call recordings: Compressed audio of every call is stored in secure E2E Object Storage in India with signed playback URLs.
• Call transcripts: The text of what was said during each call, with timestamps and speaker labels, is stored in AWS RDS PostgreSQL in India.
• In-flight call audio: Live audio streamed during an active call between the caller, agent, and providers lives only in realtime audio service memory and UDP/SIP transit. It is never persisted at this layer.

What key metrics should you evaluate during your trial?

During your trial, you should evaluate latency, interruption handling, accent recognition, and data residency compliance. These four metrics determine whether your voice agent will feel like a natural conversation or a clunky, frustrating automated system that customers immediately hang up on.

Here is exactly what to look for when you make your test calls:

• Turn-Taking Latency: Measure the time between when you finish speaking and when the agent begins to reply. In a production environment, anything over 800 milliseconds feels sluggish. Bolti is optimized for sub-second turn-taking, making conversations feel fluid.
• Interruption Handling: Speak over the agent while it is talking. Does it stop immediately and listen to you, or does it keep talking? True conversational agents must handle real-world interruptions gracefully.
• Accent and Code-Switching: Test how well the agent understands Indian English accents and "Hinglish" (mixing Hindi and English words). Using STT providers like Fennec ensures the agent does not lose context when callers use local phrasing.
• Data Residency and Security: If you operate in finance, healthcare, or consumer tech, where your customer data lives is a major constraint. Bolti runs on E2E Networks infrastructure in India by default, meaning your application data, call recordings, and transcripts remain within the ap-south region to align with DPDP Act guidelines.

How do you transition from a free trial to a production campaign?

Transitioning to production involves moving from one-off test calls to high-volume campaigns, integrating your internal APIs, and setting up phone numbers. Once you have validated the agent's performance during the trial, you can scale your operations using Bolti's developer-friendly APIs and batch calling features.

To move your validated agent into production, follow these steps:

1. Set Up Batch Calling: If you need to dial hundreds of contacts, do not loop a single API call. Create a campaign in the Bolti dashboard under the Campaigns tab. You can run Bulk campaigns (dialing a list of contacts once at a controlled rate) or Recurring campaigns (firing calls on a cron schedule, such as daily payment reminders).
2. Bring Your Own Carrier (BYOC): You do not have to buy new numbers. You can connect your existing SIP trunks from providers like Twilio, Plivo, or Exotel directly to Bolti, or use Bolti-provided numbers.
3. Integrate APIs and Webhooks: Use Bolti's open API to trigger calls from your CRM (like Zoho or Salesforce) and receive webhooks with call transcripts, call recordings, and custom tool outputs as soon as a call ends.
4. Analyze Costs: At a flat rate of ₹6/minute pay-as-you-go, you can easily calculate your return on investment. Compare this to the cost of a human BDR or support agent, especially for high-volume, repetitive tasks. You can review our pricing page to see how this scales for your business.

To see how other Indian businesses have successfully scaled their outbound and inbound operations, read our customer case studies.

Spin up your first voice AI agent in 10 minutes

You do not need prior coding experience or complex infrastructure to build a production-grade phone agent. With Bolti's 50-minute free trial, you can design an agent, select a natural Indian voice, and place your first test call immediately. Experience how our ₹6/minute pay-as-you-go platform handles real-world interruptions and multilingual conversations today.

Frequently Asked Questions

How many minutes do I get in the Bolti free trial?

You get 50 free minutes when you sign up for a Bolti trial. This allows you to build, configure, and test live phone calls to your own mobile number using any of our supported STT, LLM, and TTS providers.

Do I need to add a credit card to start the trial?

No, you do not need to add a credit card to start your 50-minute free trial. You can sign up, access the dashboard, configure your agent, and place test calls immediately.

Can I test Indian languages like Hindi during the trial?

Yes. Bolti supports over 80 languages, including Hindi, Marathi, Tamil, Telugu, Bengali, and Gujarati. You can test native Indic voices from providers like SarvamAI and SmallestAI, and use Fennec for accurate Indian accent transcription.

What happens to my data after the trial ends?

Your application data, call recordings, and transcripts remain securely stored on our E2E Networks infrastructure in India. If you choose to upgrade to our ₹6/minute pay-as-you-go plan, all your configured agents and call history will carry over seamlessly.