Messaging · Bulk + Transactional

Every message delivered on time.

High-throughput SMS across 200+ countries — millisecond OTPs and million-scale campaigns on the same gateway. Direct operator routes, provider failover, and real-time DLRs on every message.

Send your first SMS Read the docs

200+

Countries

98%

Delivery rate

<3s

OTP delivery

message-stream — nusms.coLive

→ SUBMIT_SM to=+27 82 555 0142 src=NUSMS

route: direct → MTN-ZA [bind 04]

parts: 1 · GSM-7 · OTP template

← DLR DELIVRD · 1,412ms

+44 7700 ···· EE-UK · campaign

DELIVRD

+1 415 555 ···· T-Mobile · OTP

DELIVRD

+234 80 ···· MTN-NG · alert

BUFFERED

+91 98 7654 ···· Airtel · marketing

DELIVRD

200+

Countries covered

1M+

Messages / hour

98%

Avg delivery rate

600+

Direct operator routes

How it works

From request to result, in 5 steps.

01 · SUBMIT
Submit
Message accepted via SMPP bind or REST, validated and queued in milliseconds.
02 · FILTER
Filter & rate
Spam, opt-out, and sender-ID checks; per-destination rating applied.
03 · ROUTE
Route
Best direct operator route selected, with automatic failover to backups.
04 · DELIVER
Deliver
Handed to the operator SMSC and delivered to the handset.
05 · DLR
Confirm
Real-time delivery receipt streamed back via webhook or SMPP.

Live · 41,920 sent/min

Delivery intelligence

See every delivery as it happens.

Track delivery rates per route, country, and operator in real time. Spot a failing route before it costs you conversions, and switch traffic with one click.

Per-route delivery & latency analytics
Real-time DLR webhooks per message
Automatic failover to backup routes

98.2%

Delivery rate

1.4s

Median OTP

0.4%

Bounce rate

Under the hood

Full-stack, production-ready.

Protocols & binds

Native SMPP 3.4 / 5.0 transceiver
HTTP & REST submit APIs
Multi-bind connection pooling
Window-size & throttle control

Routing & failover

Direct operator routes only
Least-cost & quality-based routing
Automatic backup-route failover
Per-country sender-ID rules

Formats & encoding

GSM-7, UCS-2 / Unicode
Concatenated long SMS
Short codes & alphanumeric IDs
Template & variable substitution

Compliance

Opt-out / STOP keyword handling
DND & suppression lists
Per-country regulatory rules
Sender-ID registration

Two-way & campaigns

Inbound MO & keyword routing
Auto-responders & flows
Scheduled & throttled campaigns
Contact list management

Reporting & webhooks

Real-time DLR webhooks
Delivery & cost analytics
CSV / API export
Per-campaign conversion tracking

10k+

Messages / sec / bind

600+

Direct routes

<200ms

Submit acknowledgement

99.95%

Gateway uptime

NU SMS runs a hardened SMPP messaging core — extended with our own routing engine, campaign tooling, and operator console, so you get carrier-grade throughput and a modern API without managing a single bind yourself.

Built for engineers

Everything you need to scale.

Bulk & two-way messaging

Send millions simultaneously; auto-respond to inbound keywords and run conversational flows.

Real-time DLRs

Delivery receipt webhooks per message — know instantly if an SMS delivered, bounced, or buffered.

Global direct routes

Direct operator connections in 200+ countries — tier-1 access only, no grey routes.

SMPP & HTTP / REST

Native SMPP for high-throughput telco integration, plus a clean REST API for modern stacks.

Send in code

One request, one message.

Fire a single OTP or a bulk batch with the same endpoint. Idempotent, versioned, with DLR webhooks out of the box.

REST + SMPP, OpenAPI spec
Signed DLR webhooks
Batch send up to 100k / request

send-sms.sh

# send a transactional OTP
curl -X POST https://api.nusms.co/v1/messages \
  -H "Authorization: Bearer $NU_SMS_KEY" \
  -d '{ "to": "+27825550142", "from": "NUSMS",
       "text": "Your code is 4821", "dlr": true }'

# → 202 Accepted
{ "id": "msg_7Kd1…", "status": "queued",
  "parts": 1, "route": "mtn-za-direct" }

Send your first message today.

Free test credits, no commitment, and a 30-day pilot to prove delivery rates on your traffic.

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NU SMS · part of the NU GUI platform

Under the hood

Full-stack, production-ready.

Protocols & binds

Native SMPP 3.4 / 5.0 transceiver
HTTP & REST submit APIs
Multi-bind connection pooling
Window-size & throttle control

Routing & failover

Direct operator routes only
Least-cost & quality-based routing
Automatic backup-route failover
Per-country sender-ID rules

Formats & encoding

GSM-7, UCS-2 / Unicode
Concatenated long SMS
Short codes & alphanumeric IDs
Template & variable substitution

Compliance

Opt-out / STOP keyword handling
DND & suppression lists
Per-country regulatory rules
Sender-ID registration

Two-way & campaigns

Inbound MO & keyword routing
Auto-responders & flows
Scheduled & throttled campaigns
Contact list management

Reporting & webhooks

Real-time DLR webhooks
Delivery & cost analytics
CSV / API export
Per-campaign conversion tracking

10k+

Messages / sec / bind

600+

Direct routes

<200ms

Submit acknowledgement

99.95%

Gateway uptime

Every message delivered on time.

From request to result, in 5 steps.

Submit

Filter & rate

Route

Deliver

Confirm

See every delivery as it happens.

Full-stack, production-ready.

Protocols & binds

Routing & failover

Formats & encoding

Compliance

Two-way & campaigns

Reporting & webhooks

Everything you need to scale.

Bulk & two-way messaging

Real-time DLRs

Global direct routes

SMPP & HTTP / REST

One request, one message.

Send your first message today.

Full-stack, production-ready.

Protocols & binds

Routing & failover

Formats & encoding

Compliance

Two-way & campaigns

Reporting & webhooks

Everything you need to scale.

Bulk & two-way messaging

Real-time DLRs

Global direct routes

SMPP & HTTP / REST

One request, one message.