SeaSmsShip OTPs and messages in minutes, not months
Global SMS, MMS, and WhatsApp with developer-first APIs, smart routing, and real-time analytics. Start free, scale when you’re ready.
Services at a glance
Everything you need to send and scale messaging—no carrier maze, no guesswork.
OTP Verification
Spin up OTP via SMS with optional voice fallback—no approvals to start.
- 5-minute setup with code templates
- Auto-expiry, retry, fraud controls
Bulk SMS
Send campaigns via our dashboard or clean APIs.
- CSV import, segmentation, personalization
- Scheduling, rate limits, high throughput
MMS Messaging
Rich media at scale—images, GIFs, PDFs—worldwide where supported.
- Auto-resize and media hosting
Two-Way Messaging & Inbox
Manage replies in a shared inbox with automation.
- Keywords, auto-replies, routing rules
WhatsApp Business
Templates, two-way chat, rich media—on the world’s favorite channel.
- Template management and onboarding help
Custom Sender IDs & Numbers
Alphanumeric IDs, local long codes, toll-free, and dedicated short codes.
- Number pooling & intelligent routing
Compliance & Registrations
We handle 10DLC (US), DLT (India), and Sender ID registrations.
- Automatic opt-out and audit logs
Delivery Analytics
See what lands and why. Optimize with real-time insights.
- DLRs, dashboards, exports, link tracking
APIs, SDKs & Webhooks
Clean REST APIs with language SDKs and webhooks. Optional SMPP.
- Postman collections, sandbox keys
Templates & Automation
Message templates, A/B tests, and triggers from events or webhooks.
Failover & Smart Routing
Automatic retries across routes with SMS→WhatsApp/voice fallback.
How it works
From “hello world” to “hello, 10 million” — without changing your code.
Instant API keys. No credit card needed.
Use a custom sender ID or number. We guide any required registrations (10DLC, DLT, etc.).
Use our REST API to send a message instantly.
# Send an SMS with curl curl -X POST https: -H 'Authorization: Bearer 49|LNFe8WJ7CPtvl2mzowAB4ll4enbFR0XGgnQh2qWY' \ -H 'Content-Type: application/json' \ -H 'Accept: application/json' \ -d '{ "recipient":"31612345678", "sender_id":"YourName", "type":"plain", "message":"This is a test message" }'# View a message with curl curl -X GET https: -H 'Authorization: Bearer 49|LNFe8WJ7CPtvl2mzowAB4ll4enbFR0XGgnQh2qWY' \ -H 'Accept: application/json'Built for developers
Secure and simple REST API for sending and tracking SMS globally.
# List all messages with curl curl -X GET https: -H 'Authorization: Bearer 49|LNFe8WJ7CPtvl2mzowAB4ll4enbFR0XGgnQh2qWY' \ -H 'Accept: application/json'Built for teams
Permissions, shared inbox, and compliance—so your whole org can move faster.
Why SeaSms
Deliver more, pay less, ship faster.
Pricing that makes sense
Choose a plan that fits your needs.
Note: Local regulations may require registration in certain countries (e.g., 10DLC in the US, DLT in India). SeaSms guides you end-to-end.
Popular use cases
Secure logins & 2FA
Send OTPs for sign-in and step-up auth.
Order updates
Real-time alerts and delivery status.
Reminders
Appointments, confirmations, follow-ups.
Marketing
Campaigns, promos, and two-way support.