
Gro SMS
Live in ProductionCommunication & Messaging Infrastructure • grosms.com
Deliver mission-critical OTPs and high-converting campaigns with sub-second latency.
Engineered by Hyberlab to solve the reliability and deliverability bottlenecks of regional messaging providers, Gro SMS provides developers and businesses with an ultra-reliable REST API, a modern self-service campaign dashboard, custom alphanumeric sender IDs, real-time delivery status (DLR) webhooks, and prepaid credit billing. Built with a high-concurrency Node.js engine and MySQL/Redis queuing, it processes tens of thousands of messages simultaneously with 99.98% delivery success rates.
- Sub-second transactional OTP delivery for instant user verification
- Dynamic contact segmentation with custom tags (VIP, Promo, Leads)
- Developer-first REST APIs with comprehensive Postman collections & SDKs
- Transparent prepaid wallet & credit management with instant top-up
Key Capabilities & Architecture
Transactional OTP Engine
High-priority queue routing ensures security codes and authentication tokens land in customer inboxes in under 3 seconds.
Bulk Campaign Scheduler
Upload CSVs, target segmented contact lists, personalize variables, and schedule blasts with smart throttling to prevent carrier blocks.
Multi-Tenant API Architecture
Secure API keys, granular team permissions, and real-time webhook callbacks for instant integration into ERPs, CRMs, and web apps.
Carrier-Grade Delivery Reports
Live telemetry into delivered, pending, and failed states with automated balance refunds for undeliverable numbers.





