CPaaS
Communication Platform as a Service
Developer-first APIs for voice, SMS, WhatsApp, RCS, email and verification — global reach, carrier-grade reliability and one platform for every channel.
Voice API & Programmable Voice
Embed click-to-call, call masking and custom call flows into your apps with carrier-grade reliability.
Read MoreIVR Blast / Outbound Dialing (OBD)
Automated outbound voice campaigns with DTMF surveys, smart retries and detailed delivery reporting.
Read MoreSMS API (Transactional, Promotional, OTP)
Transactional alerts, promotional campaigns and OTPs over direct operator routes in 190+ countries.
Read MoreWhatsApp Business API
Rich two-way conversations, notifications and in-chat commerce with fully managed Meta onboarding.
Read MoreRCS Business Messaging
Branded, verified messaging with rich cards, carousels and smart SMS fallback for guaranteed reach.
Read MoreVerify / OTP & 2FA API
Multi-channel OTP delivery with automatic failover and built-in fraud and SMS-pumping protection.
Read MoreEmail API & Bulk Email
Transactional and campaign email with managed authentication, dedicated IPs and real-time analytics.
Read MoreNumber Services
Virtual numbers, toll-free lines and sender IDs across geographies with compliance handled for you.
Read MoreHow it works
From first API key to production traffic
Every CPaaS channel follows the same path onto the platform, so adding a second or third channel is configuration, not another integration project.
Integrate
One account, one API key
Pick your channels, grab sandbox credentials, and call the same REST surface for voice, SMS, WhatsApp, RCS, email, and verification.
Comply
Sender identity and consent
We handle DLT registration, sender IDs, template approvals, and opt-out handling so your traffic is compliant before it goes live.
Send
Carrier-grade delivery at scale
Traffic routes across multiple carriers and aggregators with automatic failover, so volume spikes do not become delivery gaps.
Measure
Delivery data you can act on
Real-time webhooks and dashboards show delivery, engagement, and cost per channel — with the raw logs available via API.
99.95%
Platform uptime SLA
7Cr+
Daily OBD handled
500+
Businesses onboarded
24×7
Engineering support
Talk to us
Talk to our team about what you are building
Tell us the workflow you have in mind and the scale you expect. Our solutions team maps it to the right NobleStack setup, flags anything that needs a custom approach, and sends you pricing for your volume — no obligation.
Same-day response
Weekday enquiries get a reply within business hours.
A specialist, not a script
You speak to someone who has actually shipped this kind of setup.
Compliance answers upfront
Consent, data residency, retention, and audit questions covered early.