Messaging Suite

Every channel, route, and workflow working in concert

One Message brings OTP, customer alerts, campaigns, voice, APIs, and route strategy into one operating layer, so every message can travel with the urgency, context, and economics it deserves.

Critical Traffic

Local Operator for the moments customers wait for

Verification codes, payment alerts, recovery flows, and security notices are tiny messages with enormous consequence. Operator-grade routing gives those moments the fastest, clearest path available.

  • Direct Carrier InterconnectsSMPP binds straight into Vodafone, AT&T, Jio, Telkomsel, China Mobile, MTN, and 600+ more operators.
  • Sender ID PreservedYour alphanumeric or short-code sender shows on the handset — never replaced or stripped.
  • Sub-2-Second OTP LatencyMedian P50 of 1.8s for OTP across 35+ Tier-1 markets, backed by SLA.
  • Regulatory Coverage Built-InA2P pre-registration, sender ID approvals, DLT/TRAI/HLR — handled by our London compliance team.
See Operator Coverage →
Avg delivery rate99.7%
P50 OTP latency1.8s
Operator partnerships600+
Sender ID preservedAlways
SLA uptime99.9%
OTP / 2FATransactionalBankingMobility
Efficient Reach

Local Reseller for communication at scale

Campaigns, reminders, updates, and high-volume sends need reach without waste. Local reseller routes keep economics practical while quality monitoring keeps the work accountable.

  • Up to 70% CheaperOptimized for marketing volume without sacrificing the delivery transparency One Message is known for.
  • Auto-Failover to OperatorIf a Reseller route degrades, traffic auto-migrates to a Local Operator path — without code changes.
  • Real-Time Route QualityPer-route DLR dashboard, automatic latency probes, and a public status page for every market.
  • Unicode & Sender IDFull UTF-16 (Devanagari, Arabic, Mandarin, Cyrillic) with alphanumeric sender support.
See Reseller Coverage →
Avg delivery rate96.2%
Avg latency4.5s
Cost vs Operator−70%
FailoverAuto → Direct
UnicodeFull UTF-16
PromotionsMarketingRemindersSurveys
Campaign Messaging

Bulk SMS with a proper control room

Send promotions, reminders, launches, and lifecycle messages with sender ID options, Unicode support, audience tools, scheduling, and reporting that shows what happened after send.

  • Custom Sender IDBrand every message with alphanumeric IDs (where supported) or short codes.
  • Every Script SupportedLatin, Devanagari, Arabic, Mandarin, Cyrillic, Thai, Hebrew — native UTF-16 throughout.
  • Smart Per-Operator RoutingOperator detection on every number routes through the optimal Operator or Reseller path automatically.
  • Schedule & ThrottleSet delivery windows by timezone, ramp speeds, and per-operator throughput limits.
Explore Bulk SMS →
Avg delivery96–99%
Peak throughput100k/sec
LanguagesAll scripts
UnicodeFull UTF-16
RoutingOperator + Reseller
PromotionsAnnouncementsRemindersSurveys
Authentication

OTP delivery for the seconds that decide conversion

Move login, signup, and payment verification over priority routes with carrier fallback, fraud controls, signed webhooks, and diagnostics that help teams fix friction quickly.

  • Sub-3-Second DeliveryTier-1 OTP routes with priority handling on every operator.
  • Multi-Carrier FailoverIf a route degrades, traffic auto-fails over in milliseconds.
  • Fraud ControlsVelocity limits, geo-fencing, and OTP-spam protection out of the box.
  • Signed WebhooksHMAC-signed delivery receipts with retry queues and idempotency.
View OTP API →
// Send OTP via One Message API
POST https://api.onemessage.live/v1/otp
 
{
  "to": "+447911123456",
  "template": "login_otp_v2",
  "ttl": 120
}
 
✔ Delivered in 1.8s
✔ DLR received via webhook
Voice Outreach

Voice broadcasts when silence is too easy

Use recorded calls, text-to-speech announcements, press-key IVR, and retries when the message needs a human cadence and a higher chance of being noticed.

  • Upload or SynthesiseDrop an MP3 or use our text-to-speech in 30+ languages.
  • Press-Key IVRCapture responses with DTMF inputs for surveys and polls.
  • Call AnalyticsTrack pickup rate, duration, completion, and key-press distribution.
  • Smart RetryAutomatically retry missed calls at the optimal time of day.
Explore Bulk Voice →
Average pickup rate42%
Peak concurrent calls5,000
TTS languages30+
DTMF response captureYes
Festive campaignsPollsIVR alertsReminders
International Coverage

200+ countries, without losing the local picture

Manage country coverage, pricing, compliance, sender IDs, and delivery performance from one place instead of piecing together regional providers market by market.

  • Tier-1 Carrier RoutesDirect interconnects, no grey routes, full DLR transparency.
  • Per-Country PricingSee the cost before sending. Volume tiers across all destinations.
  • Regulatory CoverageGDPR, A2P registration, sender ID approvals — handled for you.
  • Unified DashboardOne login, one report, one invoice for every country you send to.
Talk to an Expert →
Countries supported200+
Tier-1 carrier routesDirect
Billing currencyGBP / USD
Compliance supportIncluded
Global SaaSDiaspora outreachMigration agencies
Developer Tools

A clean API that respects production reality

Integrate SMS and OTP with predictable endpoints, SDKs, idempotency, retry-safe behavior, signed webhooks, and sandbox testing before live traffic is on the line.

  • Official SDKsNode, Python, PHP, Go, .NET, Java, Ruby — all open source.
  • Idempotency KeysSafe retries without duplicate sends.
  • Signed WebhooksHMAC signatures on every event with replay protection.
  • Sandbox & PostmanTest every endpoint with a free sandbox account.
View API Docs →
# Python SDK
from onemessage import Client
 
client = Client(api_key="ark_live_...")
 
client.messages.create(
  to="+447911123456",
  sender="OneMSG",
  body="Your code is 4821",
  route="transactional"
)
 
✔ 200 OK · message_id: msg_8f3a...
No-Code Sending

Campaign tools for the teams closest to the customer

Let marketing, operations, and support teams upload audiences, personalize copy, schedule sends, and read results without waiting for an engineering window.

  • Audience BuilderUpload CSV, sync from CRM, or build segments with filters.
  • Personalisation{FirstName}, {OrderID}, custom merge tags with fallbacks.
  • A/B TestingSplit copy, sender IDs, or send times to find the winner.
  • Approval WorkflowsOptional reviewer step before launches — perfect for regulated industries.
Try Campaign Studio →
Setup time< 5 min
Audience sourceCSV · CRM · API
A/B testingBuilt-in
Approval workflowsYes
Marketing teamsAgenciesIn-house ops

Design your messaging stack around trust, not guesswork

Start with real destinations, test the route mix, and give every message the path it deserves.

Create Free Account → View Pricing