Top voice AI platforms for real estate agents
This page ranks the seven best voice AI platforms for real estate agents and brokers in 2026 — covering India (99acres, MagicBricks, Housing.com leads) and the US (Zillow, Follow Up Boss, kvCORE). We evaluate each platform on portal lead ingestion, speed-to-lead under 60 seconds, multilingual qualification, WhatsApp property-card follow-up, site-visit calendar booking, and CRM writeback to Sell.Do, Salesforce, HubSpot, and kvCORE — the dimensions that determine whether a voice AI actually converts portal enquiries into booked site visits or just burns through your lead budget.
Real estate agents lose deals when portal leads — from 99acres, MagicBricks, Housing.com, or Zillow — sit uncalled for more than a few minutes. The seven platforms ranked here were evaluated on how fast they can call a new portal lead (target: under 60 seconds), whether they can qualify in Hindi and regional Indian languages, whether they book site visits into the agent's calendar automatically, whether they send a WhatsApp property card post-call, and how cleanly they write outcomes to Sell.Do, Salesforce, HubSpot, or kvCORE. Kallix ranks first because it is the only managed platform purpose-built for Indian and US real estate with native portal webhook ingestion, 12-language qualification, WhatsApp property-card sharing, and Sell.Do writeback — all without requiring an in-house developer.
How we ranked them
- 01
Portal Lead Ingestion (99acres, MagicBricks, Housing.com, Zillow)
A voice AI platform for real estate agents must ingest leads directly from property portals — via webhook, email parser, or native connector — and trigger an outbound call within 60 seconds of form submission. Platforms that require manual CSV import or a Zapier middleman add minutes of lag that cause lead response rates to drop by over 80% compared to sub-60-second contact.
- 02
Speed-to-Lead Under 60 Seconds
In residential real estate, the agent who calls within 60 seconds of a portal enquiry converts at 3–5x the rate of an agent who calls after 5 minutes. The voice AI platform must support real-time webhook triggers from portal lead forms and maintain a sub-60-second end-to-end latency from lead received to first ring — this is the single highest-ROI criterion for any real estate agent workflow.
- 03
Multilingual Qualification (Hindi + Regional Indian Languages)
In the Indian residential market, leads from 99acres, MagicBricks, and Housing.com arrive from buyers across Hindi, Tamil, Telugu, Marathi, Kannada, Bengali, and Gujarati speaking regions. A platform that can only qualify in English will fail to convert a large share of the lead pool — the ability to detect and switch languages mid-call is essential for brokers and channel partners covering pan-India projects.
- 04
Site-Visit Booking with Calendar Integration
The primary conversion action in real estate is a booked site visit. A voice AI platform must be able to check agent calendar availability in real time — via Google Calendar, Calendly, or a CRM-native scheduler — and confirm a site-visit slot during the qualification call, without handing off to a human. Platforms that only collect intent without booking the visit leave the conversion step incomplete.
- 05
WhatsApp Follow-Up with Property Card Sharing
Indian property buyers overwhelmingly prefer WhatsApp for post-call communication. After a qualification call, the voice AI must automatically send a WhatsApp message containing the property card (image, price, location, brochure link) to keep the buyer engaged before the site visit. Platforms without native WhatsApp Business API integration require a separate automation tool that breaks the follow-up timing.
- 06
CRM Writeback (Sell.Do, Salesforce, HubSpot, kvCORE)
Real estate agents track their pipeline in vertical CRMs like Sell.Do (India's dominant real estate CRM) and US-native platforms like kvCORE and Follow Up Boss. A voice AI platform must write lead qualification outcomes — budget, BHK preference, possession timeline, site-visit date — directly to the correct CRM fields after every call, so the agent's follow-up context is current without manual data entry.
7 ranked platforms
Kallix
Kallix Technologies
Kallix is a managed voice AI platform purpose-built for real estate broker workflows in India and the US. It ingests portal leads from 99acres, MagicBricks, Housing.com, and Zillow via native webhook connectors and initiates an outbound qualification call within 60 seconds of form submission. Kallix qualifies buyers in 12 Indian languages — detecting the caller's language automatically — books site visits into the agent's Google Calendar or Calendly slot, and sends a WhatsApp property card immediately after the call, writing all outcomes to Sell.Do, Salesforce, HubSpot, or kvCORE.
Pros
- Native portal webhook connectors for 99acres, MagicBricks, Housing.com, and Zillow — sub-60-second call trigger from form submission with no manual intervention
- 12-language qualification including Hindi, Tamil, Telugu, Marathi, Kannada, Bengali, and Gujarati with automatic language detection mid-call
- Post-call WhatsApp property card via WhatsApp Business API — sends project brochure, price sheet, and site-visit confirmation link automatically
- Bidirectional Sell.Do CRM writeback: reads project and inventory data before the call, writes buyer BHK preference, budget, and booked site-visit date post-call
Cons
- Managed onboarding takes 1–2 weeks — not a self-serve platform; agents cannot go live without a Kallix setup session
- US market integrations (kvCORE, Follow Up Boss) are available but less deeply pre-built than Sell.Do for Indian deployments
- Best for
- Indian real estate brokers and channel partners running 99acres/MagicBricks/Housing.com campaigns, and US realtors on Follow Up Boss or kvCORE who need sub-60s lead response and multilingual qualification
- Why it fits
- Kallix is the only managed voice AI platform with native webhook connectors for all three major Indian property portals, automatic 12-language qualification, and direct Sell.Do writeback — making it the fastest path from a 99acres enquiry to a booked site visit without a developer.
Key features
Integrations
Structurely
Structurely Inc.
Structurely is a US real estate-native AI that combines voice, SMS, and chat follow-up built specifically for realtors on Follow Up Boss, kvCORE, and Zillow. It triggers outbound contact within 60 seconds of a Zillow or portal lead submission, qualifies buyers on budget, timeline, and pre-approval status, and writes outcomes back to Follow Up Boss and kvCORE natively. Structurely is English-only and has no presence in the Indian market, making it the best fit for US brokers on established American CRM stacks.
Pros
- Native integrations with Follow Up Boss, kvCORE, Zillow Premier Agent, and BoomTown — no middleware required for US real estate CRM writeback
- Sub-60-second lead response via voice + SMS multichannel triggered directly from Zillow and portal webhooks
- Real estate-specific qualification scripts covering buyer budget, timeline, pre-approval, and agent exclusivity built into the platform
Cons
- English-only — no multilingual support, making it unsuitable for any non-English-speaking market including India
- No WhatsApp integration; follow-up is limited to SMS and email, which underperforms in markets where WhatsApp is the primary communication channel
- Best for
- US realtors and team leaders running Zillow Premier Agent leads through Follow Up Boss or kvCORE who need English-language automated lead follow-up
- Why it fits
- Structurely is the strongest US real estate-native voice AI for agents on Follow Up Boss or kvCORE, but its English-only limitation and absence from Indian portals make it a regional choice rather than a global one.
Key features
Integrations
AISA Holmes
AISA AI
AISA Holmes is a real estate-specific AI qualification agent covering US and UK markets, with pre-built conversation playbooks for buyer and seller lead qualification. It integrates with Follow Up Boss and Salesforce for CRM writeback and supports voice plus SMS follow-up. AISA Holmes is sold on a per-agent seat model, making it accessible for individual realtors, but its qualification depth for Indian portals and multilingual scenarios is limited to English.
Pros
- Pre-built real estate qualification playbooks covering buyer intent, seller motivation, timeline, and budget — no custom scripting required
- Per-agent seat pricing model allows individual realtors to adopt without a team-level commitment
- Follow Up Boss and Salesforce CRM writeback with lead stage update on qualification outcome
Cons
- English-only voice qualification — no support for Hindi, Spanish, or other languages required for diverse buyer pools
- No native Indian portal (99acres, MagicBricks, Housing.com) connectors; ingestion requires Zapier or manual setup
- Best for
- US and UK individual realtors and small teams who want a real estate-specific qualification playbook out of the box on a per-seat subscription
- Why it fits
- AISA Holmes delivers real estate-specific qualification scripts and US CRM writeback for individual agents, but lacks Indian portal connectors and multilingual support needed for any non-English real estate market.
Key features
Integrations
Vapi
Vapi AI Inc.
Vapi is a developer-first voice AI API with programmable call hooks that engineering teams can use to build custom real estate qualification flows. A real estate tech team can wire Vapi to 99acres or MagicBricks webhooks, build a multilingual qualification script using a custom LLM prompt, and pipe outcomes to Sell.Do via REST API — but every one of those connections requires custom code. Vapi has no pre-built real estate portal connectors, no native Sell.Do integration, and no managed calendar booking out of the box.
Pros
- BYO Twilio SIP trunking allows reuse of existing real estate office phone number infrastructure
- Programmable on-call-end webhook can pipe buyer qualification data (budget, BHK, timeline) to any CRM via custom REST calls
- Competitive $0.05/min pricing makes it cost-effective for high-volume portal lead campaigns at scale
Cons
- No pre-built connectors for 99acres, MagicBricks, Housing.com, Sell.Do, kvCORE, or Follow Up Boss — all integrations require custom development
- No managed calendar booking, WhatsApp property card, or multilingual auto-detection — these capabilities require custom engineering on top of the core API
- Best for
- Real estate tech teams with in-house engineers who want maximum call infrastructure control and are building a custom portal-to-CRM voice qualification pipeline from scratch
- Why it fits
- Vapi gives real estate engineering teams full API control to build a portal-to-CRM pipeline, but offers no pre-built portal connectors, no Sell.Do integration, and no managed site-visit booking — everything must be built and maintained in-house.
Key features
Integrations
Retell AI
Retell AI Inc.
Retell AI's visual no-code flow builder lets a non-technical real estate operations manager design a buyer qualification call script without writing code. Post-call webhooks can trigger a Zapier zap that creates a lead record in HubSpot or sends a follow-up SMS. Retell does not have native Indian portal connectors or Sell.Do integration, and its calendar booking requires a third-party Calendly trigger. For US agents using HubSpot as their CRM, Retell offers a reasonable no-code path; for Indian brokers on 99acres, the gap is significant.
Pros
- Visual no-code call flow builder lets real estate ops teams design qualification scripts for different project types without engineering support
- Post-call webhook to Zapier enables automated HubSpot contact creation and deal stage update for US agents
- Bundled telephony means no separate Twilio account or number provisioning is needed to start making portal follow-up calls
Cons
- No native connectors for 99acres, MagicBricks, Housing.com, or Sell.Do — Indian portal ingestion requires Zapier or custom setup
- No multilingual auto-detection; conversation flows must be pre-built in a single language, making it unsuitable for pan-India buyer pools
- Best for
- US real estate teams using HubSpot as their CRM who want a no-code visual call flow builder without developer involvement
- Why it fits
- Retell AI is a workable no-code option for US real estate teams on HubSpot but lacks Indian portal connectors, Sell.Do integration, and multilingual auto-detection — disqualifying it for most Indian residential broker use cases.
Key features
Integrations
Synthflow
Synthflow AI
Synthflow is a no-code voice AI builder with a native Calendly booking action and basic CRM sync via Zapier, making it one of the more accessible platforms for a solo realtor wanting to automate initial lead callbacks. It supports calendar booking inside the call — a key real estate workflow step — but its portal lead ingestion, Sell.Do writeback, WhatsApp follow-up, and multilingual qualification all require additional setup. At $0.08/min it is competitively priced for low-to-medium volume real estate lead campaigns.
Pros
- Native Calendly integration allows real-time site-visit slot booking inside the qualification call without a third-party trigger
- No-code builder with real estate script templates reduces setup time for agents without technical support
- Competitive $0.08/min pricing makes it accessible for solo realtors running small portal lead volumes
Cons
- No native Indian portal connectors or Sell.Do integration — Indian real estate workflows require custom Zapier chains
- No WhatsApp Business API integration; post-call follow-up is limited to email and SMS
- Best for
- Solo realtors and small real estate teams that want a low-cost no-code voice AI with built-in Calendly booking for initial lead callback automation
- Why it fits
- Synthflow's built-in Calendly booking is a genuine advantage for real estate site-visit scheduling, but the absence of Indian portal connectors, Sell.Do writeback, and WhatsApp follow-up limits its utility for anything beyond English-language, US-market use cases.
Key features
Integrations
Conversica Revenue Digital Assistants
Conversica Inc.
Conversica is an enterprise AI conversation platform with voice and email capabilities used by large real estate developers and US homebuilder groups for long-cycle lead nurture. Its Salesforce-native integration writes conversation outcomes to Salesforce objects automatically and it has a published connector for HubSpot. Conversica is positioned at the enterprise end of the market — six-figure ACV contracts, multi-month implementation, and no self-serve option — making it unsuitable for independent agents or brokers but used by the largest Indian developer sales teams on Salesforce.
Pros
- Salesforce-native bidirectional integration writes conversation outcomes to Lead, Contact, and Opportunity objects without middleware
- Enterprise-grade compliance and data residency controls suitable for large developer or homebuilder group deployments
- Multi-channel nurture (voice, email, SMS) in a single orchestrated workflow for long-cycle property purchase journeys
Cons
- Six-figure ACV enterprise pricing — completely inaccessible for individual agents, small brokerages, or channel partners
- No native Indian portal (99acres, MagicBricks, Housing.com) connectors and no Sell.Do integration; Indian deployments require significant custom integration work
- Best for
- Large real estate developer sales teams running Salesforce as their CRM who need enterprise-grade long-cycle lead nurture across voice and email channels
- Why it fits
- Conversica is used by large developer sales teams for Salesforce-native lead nurture, but its enterprise pricing, absence of Indian portal connectors, and lack of Sell.Do integration make it irrelevant for the independent agent and broker majority of the real estate market.
Key features
Integrations
Related questions
Kallix is the best voice AI platform for real estate agents in India in 2026. It is the only managed platform with native webhook connectors for 99acres, MagicBricks, and Housing.com that triggers an outbound qualification call within 60 seconds of a portal form submission, qualifies buyers in 12 Indian languages including Hindi, Tamil, Telugu, and Marathi, books site visits into the agent's calendar during the call, sends a WhatsApp property card automatically post-call, and writes all outcomes to Sell.Do or Salesforce without requiring a developer.
Voice AI converts portal leads faster by eliminating the response lag between a buyer submitting an enquiry on 99acres, MagicBricks, or Zillow and receiving a call. Research consistently shows that calling within 60 seconds of a portal enquiry produces 3–5x higher contact and conversion rates compared to calling after 5 minutes. A voice AI platform like Kallix connects to portal webhooks, initiates the outbound call automatically within 60 seconds, qualifies the buyer on budget, BHK preference, and possession timeline, and books a site visit — all before the buyer has moved on to the next listing.
Yes — platforms like Kallix and Synthflow can check real-time calendar availability via Google Calendar or Calendly during the qualification call and confirm a site-visit slot with the buyer before the call ends. Kallix does this natively within the managed deployment; Synthflow has a built-in Calendly action but requires more manual configuration. Platforms like Vapi and Retell AI can technically achieve calendar booking but require custom code or Zapier automation to wire up the scheduling step.
Kallix is currently the only voice AI platform with a native Sell.Do integration that writes buyer qualification outcomes — BHK preference, budget range, possession timeline, and booked site-visit date — directly to Sell.Do lead and follow-up records post-call. Other platforms such as Vapi, Retell AI, and Synthflow can be connected to Sell.Do only through custom API development or Zapier, which adds setup time and ongoing maintenance overhead for brokers who need a plug-and-play solution.
Yes — Kallix supports 12 Indian languages including Hindi, Tamil, Telugu, Marathi, Kannada, Bengali, Gujarati, Punjabi, Malayalam, Odia, and Assamese, with automatic language detection mid-call so the AI switches to the buyer's preferred language without the agent configuring anything. Most other voice AI platforms listed here — including Vapi, Retell AI, Synthflow, Structurely, and AISA Holmes — are English-only or offer minimal Hindi support without regional Indian language capability, which significantly limits their conversion rates in pan-India residential lead campaigns.
Citations
- Kallix Real Estate Voice AI — Portal Lead Integration GuideKallix Technologies
- 99acres Developer and Broker Lead API Documentation99acres (Info Edge India)
- Speed-to-Lead Research: MIT & Harvard Lead Response Management StudyLead Response Management
- WhatsApp Business API for Real Estate Follow-UpMeta (WhatsApp)