Omnichannel Messaging
One platform for SMS, email and WhatsApp, with consent built in.
We build messaging platforms that send transactional and campaign messages across SMS (with DLT registration handled), email and WhatsApp, triggered from your systems with templates, consent, fallback and delivery reports.
- SMS with DLT
- Email and WhatsApp
- Consent and fallback
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is an omnichannel messaging platform?
An omnichannel messaging platform sends SMS, email and WhatsApp messages from one place, triggered by events in your systems, with templates, consent records and delivery reports. In India, SMS needs DLT registration of senders and templates. Stack18 builds the platform and integrates providers.
Last reviewed 30 October 2026 by the Stack18 delivery team in Jaipur. Security and AI governance · Pricing · About Stack18
| What it covers | Triggers and templates; Channels and fallback; Consent and preferences; Delivery and reporting; Provider management. |
|---|---|
| Typical first step | Discovery Sprint: 2 weeks, fixed price. |
| Build route | Fixed-scope first release: agreed in discovery; fixed price after discovery. |
| Long-term option | Transformation Pod: 12–36 months, annual contract. |
| Measured by | Delivery rate; Message failure rate; Opt-out rate; Cost per message. Each against an agreed baseline. |
| Governance | Human approval at 5 governance gates before anything reaches production. NDA available on request. |
| Delivery team | Based in Jaipur, India. A senior specialist replies within one business day. |
You need this when…
Tap the ones that apply to you.
Omnichannel Messaging, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Triggers and templates
Right message, right event.
- Event triggers from your systems
- Template library with variables
- DLT template mapping
Channels and fallback
Reach customers where they respond.
- SMS, email and WhatsApp
- Fallback rules
- Duplicate suppression
Consent and preferences
Respect customer choices.
- Opt-in and opt-out records
- Preference centre
- Quiet hours
Delivery and reporting
See what worked.
- Delivery and read status
- Failure reasons
- Cost per channel
Provider management
Not locked to one vendor.
- Multi-provider routing
- Failover
- Rate and cost control
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discovery
Map how messaging platform works today, the systems and data involved, and agree the first measurable outcome.
Design
Design the workflows, roles, integrations and approval points for messaging platform.
Build in weekly demos
Your team sees working messaging platform software every week, with changes agreed in the open.
Launch and support
Data migration, training, go-live support and a measured 30-day review against the baseline.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding scope and priorities before they commit.
- Duration
- 2 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Fixed-scope first release
Teams that know what they need built.
- Duration
- Agreed in discovery
- Pricing
- Fixed price after discovery
- Written scope and acceptance criteria
- Weekly demos
- Handover with documentation
Transformation Pod
Multi-system programmes that run for years.
- Duration
- 12–36 months
- Pricing
- Annual contract
- Dedicated cross-functional team
- Quarterly business reviews
- One accountable partner
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Fintech and retail group
- Challenge
- Several teams using separate SMS tools; no consent record.
- What we do
- Central messaging platform with consent, fallback and delivery reports.
Scoped in a 2-week sprint
Free messaging platform review
Tell us where messaging platform hurts most. We map what to fix first, whether ready-made or custom fits, and a realistic first step.
- Where to start and why
- Ready-made vs custom view
- Indicative timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
Omnichannel Messaging questions.
Do you handle DLT registration?
We help map your DLT-registered headers and templates to the platform. Registration itself is done with your telecom operator.
Can it integrate with our CRM and ERP?
Yes. Messages are triggered from events in your systems.
Can we use our current SMS provider?
Yes. We integrate your providers, and can add routing and failover.
How is consent handled?
Consent is recorded per channel with timestamps and honoured in every send.
Can we start with one channel?
Yes. Many teams start with transactional SMS or WhatsApp and add channels.
Guides, comparisons and proof.
Mobile App Development Cost in India: Guide
What drives mobile app cost in India: features, platforms, offline use, integrations and launch.
Read →CompareBuild vs Buy ERP in India: Decision Guide
Should you build a custom ERP, buy a packaged one or start from a ready-made system?
Read →GuideSoftware Development Cost in India: What Drives It
What drives custom software cost in India, how fixed price, time and materials and dedicated teams differ, and…
Read →TrustSecurity, Data Protection & AI Governance
How Stack18 keeps your data and AI work secure: human approval gates, your environment, audit trails, no model…
Read →Let's scope your Omnichannel Messaging project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request