Developer-friendly API
Simple REST API with idempotency keys, webhooks for DLR and incoming SMS, plus examples for Node.js, Python, PHP, Go and Ruby. Send your first SMS with curl in under 60 seconds.
Send SMS to Constantine
SveaSMS gives you a direct path to send bulk SMS in minutes — with tier-1 routing, real-time analytics and no KYC delay. Send SMS to Constantine shows exactly how to get started.
- From $0.09 / €0.08 per SMS — pay as you go, no monthly fees
- Send SMS to recipients in Constantine
- Any Sender ID (brand or shortcode)
- Direct carrier routes and real-time DLR
- Bulk, transactional and OTP SMS
- REST API, dashboard or CSV
- No KYC, no lock-in
Real-time analytics
See delivery rate, click rate, opt-outs and revenue per campaign in real time. Segment by operator, geography and time of day — then export to your data lake with webhooks or CSV.
Your own Sender ID
Set any sender name you want, up to 11 alphanumeric characters. No pre-approval, no waiting, no follow-up questions. Change Sender ID between campaigns or use different IDs per segment for A/B testing.
Delivery rate that holds
Direct connections to Telia, Telenor, Tre and Tele2 provide stable delivery to Swedish numbers. Real-time DLR shows exactly which SMS were delivered, pending or bounced — nothing sits in dark queues.
Frequently asked questions
How do I pay?
Crypto (BTC, ETH, USDT) via NOWPayments or card via Banxa. Balance is active as soon as payment is confirmed.
Do I need KYC or verification?
No. Sign up, top up and send. No forms, no application, no waiting.
Is SMS content logged?
Metadata is logged for DLR and support. Message content can be pseudonymized or deleted on request.
Which countries do you cover?
Primarily Sweden through tier-1 direct connections. Nordic countries and Europe are available through partner networks.
Can I use multiple Sender IDs at once?
Yes. Rotate per segment, campaign or language with no hard cap.
Can I schedule campaigns?
Yes. From the dashboard or API, including timezone-aware scheduling and batch sends.