Communications

190+ countries. 6 channels. One API. SMS, WhatsApp, RCS, MMS, Email, Voice, and Video through a single integration with automatic failover.

System Architecture

Unified Channel Architecture

Every channel shares a single ingress: the SMSLY REST API. Messages are normalized into an internal envelope, enriched with routing metadata, and dispatched through channel-specific adapters that handle protocol translation, delivery tracking, and compliance formatting.

Adaptive routing selects the optimal carrier in real time based on latency, cost, and success history. When a channel degrades, failover is automatic — no retry logic needed on your side.

01 PROTOCOL

One API, Every Channel

SMS to 190 countries. WhatsApp to 2B users. RCS on native phones. Email with cryptographic proofs. Voice with neural TTS. Video with HIPAA rooms. One REST API sends to all of them. Channel-specific formatting, delivery tracking, and compliance handled automatically.

02 PROTOCOL

Automatic Failover

Silent OTP fails on carrier? SMS fires in 200ms. SMS blocked? WhatsApp takes over. WhatsApp session expired? Voice delivers the code. Five fallback channels run in sequence. Delivery rate stays above 99.5% regardless of carrier outages.

03 PROTOCOL

Sub-Second at Million-Scale

Average OTP delivery: 1.8 seconds globally. Bulk campaigns: 10,000 messages/second. Rate limiting respects carrier thresholds. Queue management prevents thundering herd. Same latency whether you send 1 or 1 million.

Manifestations

Powered by Nature.
Engineered for Scale.

Node 01

SMS API

Global SMS delivery with 99.9% uptime and real-time analytics.

  • Carrier-Grade Smart RoutingReal-time path optimization across 800+ global carriers to bypass network congestion.
  • Bidirectional MessagingSend and receive messages with local numbers, short codes, and toll-free numbers globally.
  • Automatic Failover RetrySilent fallback to alternative carrier routes in under 150ms upon carrier delivery failure.
  • Global Compliance GuardAutomatic formatting and local regulation checking (TCPA, GDPR, CTIA) for every message sent.
  • Intelligent Queue ManagementPrevent traffic spikes from flooding downstream carriers with adaptive rate limiting.
  • Unicode & ConcatenationSend complex character sets, emojis, and long multi-part text messages seamlessly.
  • Real-Time Handshake TrackingDetailed webhook notifications for transit, carrier queue, handset delivery, and fail states.
  • Short Link & Click TrackingAutomatically shorten links and track click-through rates directly within the analytics dashboard.
  • Dynamic Sender IDsUse alpha-numeric sender identification in supported countries to boost brand recognition.
  • 10DLC Campaign RegistryDirect integration with TCR for fast, compliant high-throughput message approval.
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Node 02

WhatsApp Business API

Rich messaging on the world's most popular platform.

  • Official Business VerificationGuide through Meta verification to display the official green check badge on your profile.
  • Interactive Message TemplatesBuild pre-approved templates with quick reply buttons, call-to-action links, and media placeholders.
  • Rich Media ExchangeSend and receive high-definition images, videos, audio, PDF documents, and location payloads.
  • Interactive Product ListsSend product catalogs, interactive lists, and single/multi-product messages to enable in-chat shopping.
  • Two-Way Conversational FlowsCreate automatic conversational menus and agent hand-offs with comprehensive webhook support.
  • Meta Policy Compliance GuardAutomatic template monitoring and session window alerts to ensure compliance with WhatsApp policies.
  • User Profile EnrichmentAutomatically fetch user profile names and contact details during initial contact events.
  • High-Throughput MessagingScalable template delivery capable of sending thousands of customer notifications per minute.
  • Secure End-to-End EncryptionMaintain WhatsApp's default security with full support for encrypted media and secure messaging.
  • Conversation AnalyticsIn-depth tracking of message read rates, button clicks, and session metrics directly from the dashboard.
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Node 03

RCS Business Messaging

Next-generation SMS with rich media and interactivity.

  • Branded Business ProfilesDisplay your verified brand name, logo, custom color theme, and verified check badge.
  • Rich Media CarouselsPresent products, services, or choices with scrollable, interactive card layouts containing images and buttons.
  • Suggested Actions & RepliesEmbed tap-to-act buttons for opening URLs, calling numbers, sharing locations, or triggering quick replies.
  • Interactive Map IntegrationEmbed interactive maps, location sharing, and calendar links directly within the conversation.
  • Typing & Read IndicatorsTrack customer engagement in real-time with standard typing bubbles and read receipts.
  • Universal Carrier FallbackAutomatically degrade to rich SMS/MMS if the customer's device or network does not support RCS.
  • Pre-Approved Brand VettingStreamlined registration with Google and mobile carriers to verify your sender identity.
  • High-Speed File TransferShare high-resolution videos, documents, and files up to 100MB directly in the native messaging app.
  • Rich Conversation HistoryFull audit trails and logs of two-way conversations and customer click actions.
  • Conversational AnalyticsDeep analytical insights into carousel impressions, button clicks, and read timestamps.
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Node 04

Live Chat

Website chat widget with AI co-pilot, visitor intelligence, and real-time presence. 40% faster handle time with suggested responses.

  • AI Co-PilotSuggests responses, surfaces docs, and auto-answers routine questions.
  • Visitor IntelligenceSee page views, navigation path, and referrer in real-time.
  • Proactive TriggersAuto-initiate chat based on time on page, cart value, or exit intent.
  • Smart RoutingRoute by page, visitor segment, or question type.
  • Custom BrandingMatch colors, position, and icons. Launch with one line of JavaScript.
  • AnalyticsResponse time, resolution rate, and agent performance metrics.
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Extended Ecosystem

MMS API

Send images, videos, and rich media via text message.

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Viber Business

Rich messaging on Viber with carousels, buttons, and branded sticker packs. Strong in Eastern Europe and CIS.

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Email API

Enterprise-grade email infrastructure with cryptographic authenticity proofs, multi-provider failover, and real-time deliverability intelligence.

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