Bulk SMS Services
High-throughput promotional & transactional SMS routes with real-time delivery reports and 20+ operator connectivity across India.
DLT compliant · API & panel accessTrusted Telecom & Messaging Partner — India
Every call connected. Every OTP delivered. Every agent dialing faster.
CallPlus Infotech Solutions Pvt Ltd builds the voice and messaging backbone for Indian call centers and enterprises — Bulk SMS, OTP, WhatsApp Business API, Recovery & Sales Dialer Software, SIP Trunk Dialer, Cloud Dialer, and end-to-end DLT Registration under one roof.
120M+SMS delivered / month
99.9%Dialer uptime SLA
500+Call centers & BPOs
24×7Technical support
What we deliver
One partner for voice, SMS and messaging infrastructure
From a single OTP to a 500-seat outbound floor, CallPlus provides the licensed, compliant, and scalable communication stack your business runs on.
OTP SMS
Sub-2-second OTP delivery for login, KYC and payment verification, with automatic route failover for guaranteed delivery.
Avg. latency 1.8sWhatsApp SMS / Business API
Official WhatsApp Business API for order updates, OTP, and support conversations with read-receipt tracking and rich templates.
Verified green-tick onboardingSMS API
Developer-first REST & SMPP APIs with sandbox keys, delivery webhooks, and SDKs so your product team ships integrations fast.
REST · SMPP · WebhooksRecovery Dialer Software
Purpose-built dialer for loan and debt recovery teams — DND-aware pacing, promise-to-pay tracking, and compliance call logging.
Collections-focused workflowSales Dialer Software
Auto dialer built for outbound sales teams — lead prioritisation, disposition codes, and CRM sync to shorten every sales cycle.
Lead-to-call in one clickSIP Trunk Based Dialer
Carrier-grade SIP trunking with N+1 redundancy, works with your existing PBX or IP-PBX for zero-hardware-replacement rollouts.
Multi-carrier failoverCloud Dialer
No on-premise servers — spin up an outbound or blended contact center floor in hours with browser-based agent consoles.
Zero hardware · pay-as-you-scaleDLT Registration
End-to-end TRAI DLT registration — entity onboarding, header registration, and content template approvals handled for you.
Entity + header + templateDialer engine
Progressive and Predictive dialing, tuned to your floor
Choose the pacing mode that fits your compliance and conversion goals — or blend both across campaigns from the same console.
Progressive Dial 1 : 1
Dials exactly one number the moment an agent becomes free. Every connected call has a live agent ready — ideal for recovery and compliance-sensitive campaigns.
Agent utilisation
Abandon rate
- Zero missed-connect abandonment
- Best for regulated recovery calling
- Simple, predictable pacing logic
Predictive Dial N : 1
Dials multiple numbers ahead of agent availability using live answer-rate modelling, maximising talk time across large outbound campaigns.
Agent utilisation
Abandon rate
- Up to 3.4x higher talk-time per agent
- Auto-tuned pacing within TRAI abandonment limits
- Best for high-volume sales campaigns
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Preview & Progressive Dial
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Predictive Dial Engine
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Multi-line Blended Calling
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Real-time Call Recording
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IVR & Call Routing
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CRM & Lead Sync
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Live Agent & Campaign Analytics
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Disposition & Callback Scheduling
Infrastructure
SIP Trunk & Cloud Dialer architecture
Bring your own PBX or go fully cloud — CallPlus routes every leg over redundant, carrier-grade SIP so campaigns never drop for infrastructure reasons.
Agent ConsoleBrowser / softphone
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CallPlus Dialer CoreProgressive / Predictive engine
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SIP Trunk LayerN+1 carrier redundancy
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PSTN / Mobile NetworkPan-India termination
Regulatory compliance
DLT Registration, handled end-to-end
TRAI's Distributed Ledger Technology (DLT) platform is mandatory for every entity sending SMS in India. We manage the entire filing so your messages never get blocked.
Entity Registration
PAN-based business entity onboarding on the DLT platform with document verification.
Header Registration
Register your Sender ID / header across all telecom operators for consistent branding.
Template Approval
Content templates mapped and submitted for operator scrubbing and approval.
Go Live
Approved templates linked to your SMS API / panel — typically live within 24–48 hours.
Why CallPlus
Built for teams that can't afford downtime
99.9% Uptime SLA
Redundant SIP carriers and geo-distributed servers keep campaigns running.
24×7 Technical Support
Dedicated account managers and NOC support in English and Hindi.
Full Compliance
DND scrubbing, DLT registration, and TRAI abandonment-rate adherence built in.
Open API Access
REST, SMPP and webhook integrations with clear documentation for your dev team.
Clients
Trusted by call centers, NBFCs and D2C brands
"Switching to CallPlus's predictive dialer took our agent talk-time up significantly within the first month, without our abandonment rate breaching TRAI limits."
RK
Operations HeadNBFC Collections Team
"OTP delivery used to be our biggest support complaint. With CallPlus's SMS API and multi-route failover, that's simply not an issue anymore."
SP
CTOD2C Fintech App
"DLT registration felt intimidating before we spoke to their compliance team. They handled entity, header and templates for us end-to-end."
AM
Marketing ManagerRetail Brand
FAQ
Common questions
What is the difference between Progressive and Predictive dialer software?
A progressive dialer places one call per available agent as soon as that agent is free, so every connected call reaches a live agent. A predictive dialer dials multiple numbers ahead of agent availability using pacing algorithms, increasing talk time but requiring active abandonment-rate management.
What is DLT registration and why is it mandatory?
DLT (Distributed Ledger Technology) registration is a TRAI requirement for any business sending SMS in India. It covers entity registration, sender header registration, and content template approval. Without it, promotional and transactional SMS get blocked by telecom operators.
Can SIP trunk based dialer software work with my existing PBX?
Yes. Our SIP trunk dialer integrates with most existing PBX / IP-PBX systems and CRMs over standard SIP, so you can add outbound calling capacity without replacing hardware.
Do you provide WhatsApp Business API with a verified green tick?
Yes, we manage the full WhatsApp Business API onboarding, including business verification and template message approvals for order updates, OTP, and support conversations.
Is the Cloud Dialer suitable for a work-from-home agent team?
Yes. Since the Cloud Dialer runs through a browser-based agent console with no on-premise hardware, distributed and work-from-home agent teams can log in securely from anywhere.
Let's set up your floor
Ready to dial smarter and deliver every message on time?
Talk to our team about SMS, OTP, WhatsApp API, dialer software, SIP trunking or DLT registration — get a tailored quote within one business day.
Book a Free Demo →