Voice AI Agent for Pre-Screening: Automate HR Calls in 2026

Bolti, a voice AI platform for building production-ready conversational phone agents, lets you automate your hiring pipeline with a dedicated voice AI agent for pre-screening. Whether you need to filter through hundreds of resumes or quickly gauge candidate interest, Bolti handles the first-round phone calls automatically—costing just ₹6/min pay-as-you-go with 50 free minutes to get you started.

In 2026, recruiters no longer need to spend weeks playing scheduling tag. By deploying a voice AI agent for pre-screening, you can run structured, natural, multilingual phone interviews the moment a candidate applies.

What is a voice AI agent for pre-screening?

A voice AI agent for pre-screening is an automated phone agent that calls job applicants, asks role-specific questions, and evaluates their responses in real time.

Instead of a human recruiter spending 20 minutes on a repetitive introductory call, Bolti's voice pipeline manages the conversation. The agent uses advanced Voice Activity Detection (VAD) and real-time interruption handling to conduct natural, back-and-forth phone interviews. It transcribes the conversation, analyzes candidate answers against your job description (JD), and updates your dashboard with structured feedback.

How does Bolti's pre-screening pipeline work?

Every phone call run by Bolti relies on a highly optimized, sub-second latency pipeline. When your candidate answers the phone, the system executes a continuous loop:

1. Speech-to-Text (STT): The candidate's spoken answers are transcribed in real time using low-latency providers like Deepgram or Fennec (optimized for Indian accents and languages).
2. Large Language Model (LLM): The transcribed text is processed by models from providers like OpenAI, Gemini, or DeepSeek. The LLM references your job description and custom questions to decide what to say next.
3. Text-to-Speech (TTS): The agent's response is synthesized back into natural audio using high-quality voices from providers like Cartesia, ElevenLabs, or SarvamAI, and streamed directly to the candidate's ear.

This entire loop happens in under a second, ensuring the conversation flows naturally without awkward, robotic pauses.

Step-by-step: Setting up your screening agent

Building a repeatable pre-screening funnel in Bolti takes less than 10 minutes. You do not need to write complex code or manage telephony infrastructure. Here is how to configure it in your dashboard:

1. Create the role and paste your JD

Navigate to Agents → HR Screening in the Bolti dashboard and click + New Role. Enter the job title (e.g., Senior Backend Engineer) and paste your full job description. The agent uses this JD verbatim during the call to understand the technical requirements and responsibilities it must screen for.

2. Add your custom screening questions

Define the specific questions you want the voice agent to ask. These can be technical qualifiers, notice period checks, or salary expectation questions. For example:

• "What is your experience working with distributed systems in Python?"
• "What is your current notice period?"
• "Are you comfortable working on-site in Bengaluru?"

3. Connect the agent template variables

To ensure the agent knows who it is calling and what to ask, Bolti uses four template variables in your system prompt:

• {{ candidate_name }}: Populated automatically from the candidate's resume.
• {{ jd_text }}: The job description you pasted.
• {{ custom_questions }}: Your list of role-level screening questions.
• {{ candidate_details }}: Bullet points summarized from the candidate's uploaded CV.

Simply add these variables using Jinja-style braces in your agent's system prompt (e.g., "You are screening {{ candidate_name }} for the following role: {{ jd_text }}"), and your agent is ready to call.

4. Upload resumes and trigger outreach

Upload candidate CVs directly to the role. Bolti automatically parses the files and generates LLM-summarized pointers of their experience. From there, you can launch outreach in two ways:

• Schedule outbound calls: Set a specific date and time for Bolti to call the candidate automatically.
• Send a scheduling link: Send a self-booking link via email or WhatsApp. When the candidate selects a time slot, Bolti initiates the call at that exact moment.

Why use Bolti for HR pre-screening?

Traditional recruitment processes are slow and expensive. Bolti's telephony-grade voice agents solve the most common bottlenecks in the hiring funnel:

• No scheduling friction: Candidates choose when they want to talk, and the AI agent calls them instantly. No human calendar coordination required.
• Multilingual capabilities: Screen candidates in their preferred language. Bolti supports Hindi, Marathi, Tamil, Telugu, Gujarati, Bengali, English, and over 80 global languages.
• Telephony-grade noise cancellation: Candidates can take calls on the go. Bolti filters out background traffic, wind, and line noise so the transcription remains perfectly accurate.
• Immediate grading: As soon as the call ends, the transcript and structured summary are saved to your dashboard, allowing you to filter top talent instantly.

To see how other companies use automated voice workflows to scale their operations, check out our Bolti use cases.

Comparing Bolti to traditional screening methods

Feature	Traditional Recruiter Calls	Bolti Voice AI Agent
Time to screen 100 candidates	2 to 3 weeks	Less than 1 hour (simultaneous calls)
Cost per screen	High (recruiter hourly rate + tools)	Extremely low (₹6/minute pay-as-you-go)
Availability	Standard business hours only	24/7 (candidates screen when ready)
Data consistency	Subjective notes, varying questions	Structured transcripts, identical rubrics

If you want to review our volume discounts or compare telephony costs, check out the Bolti pricing page.

Set up your first pre-screening voice agent

Stop wasting hours on repetitive first-round phone screens. Spin up your first HR-screening voice agent in under 10 minutes and let AI handle your top-of-funnel recruitment. Start your free trial today and get 50 free minutes of call time to test your agent on real phone lines.

Frequently Asked Questions

Can the candidate interrupt the voice AI agent during the screening?

Yes. Bolti features real-time interruption handling and Voice Activity Detection (VAD). If a candidate starts speaking while the agent is talking, the agent stops immediately and listens to what the candidate is saying, just like a real human recruiter.

Which languages does the pre-screening agent support?

Bolti supports over 80 global languages, including major Indian languages like Hindi, Marathi, Tamil, Telugu, Bengali, Gujarati, and English. You can configure the agent's language and voice profile directly in the dashboard.

Do I need my own phone system to make outbound screening calls?

No. You can use Bolti's built-in phone numbers to make outbound calls immediately. Alternatively, Bolti supports BYOC (Bring Your Own Carrier), allowing you to connect your existing SIP trunks from Twilio, Plivo, or Exotel.

How does the agent know what questions to ask the candidate?

The agent dynamically pulls custom questions and job description details directly from your role configuration using template variables like {{ custom_questions }} and {{ jd_text }}. It tailors its conversation based on those variables and the candidate's parsed resume.