WONS SMS
Per segment. Bought by the top-up.
No monthly fee on any tier, and no contract. You buy credit; the more you buy in 90 days, the cheaper every segment gets.
A segment is not a message
160 characters is one segment, 153 in each one after. A 400-character message is three segments and costs three — and one curly quote or any Dzongkha drops the whole message to 70.
Every top-up counts, and they add up
Set by what you bought in the last 90 days, added together — four $50 top-ups reach the same rung as one $200. The better rate applies to your whole balance the moment it lands.
You only pay for what leaves
Cancelled inside its undo window, expired before delivery, or permanently failed — all refunded automatically. Sandbox is free and unlimited.
Sandbox
- Simulated sends only
- Never reaches a handset
- The whole API, free
Starter
Start here- Both networks
- Delivery receipts
- 1,000 recipients
- 14-day history
Growth
Everything in Starter, plus
- Signed webhooks
- Priority routing
- 5,000 recipients
- 20 a second
- 30-day history
Business
Everything in Growth, plus
- Your own sender ID
- Dzongkha and Unicode
- Scheduled sending
- 20,000 recipients
- 50 a second
- 90-day history
Enterprise
Everything in Business, plus
- 50,000 recipients
- 200 a second
- 365-day history
| Sandbox | Starter | Growth | Business | Enterprise | |
|---|---|---|---|---|---|
| Per segment | Free | $0.10 | $0.085 | $0.07 | $0.05 |
| Priority segment | — | — | $0.255 | $0.21 | $0.15 |
| Bought in 90 days | Free with any account | Where every account starts | $50.00 in 90 days | $200.00 in 90 days | $1,000.00 in 90 days |
| Messages per second | 1 | 5 | 20 | 50 | 200 |
| Recipients per request | 10 | 1,000 | 5,000 | 20,000 | 50,000 |
| History kept | 7 days | 14 days | 30 days | 90 days | 365 days |
| Dzongkha / unicode | ✓ | — | — | ✓ | ✓ |
| Your own sender ID | — | — | — | ✓ | ✓ |
| Scheduled sending | — | — | — | ✓ | ✓ |
| Receipt webhooks | ✓ | — | ✓ | ✓ | ✓ |
| Priority sending | — | — | ✓ | ✓ | ✓ |
Do small top-ups count?
Yes — that is the point of the window. It is the total you have bought in 90 days that decides your rate, so $50 four times and $200 once reach the same rung. Nothing is wasted for being small.
What happens when a top-up gets old?
It stops counting 90 days after you bought it, and your total drops by that much. If the total falls below your rung, your rate returns to the one below. Your console shows the exact date in advance, and tells you what would keep it.
Am I ever charged more for messages I already sent?
No. A message is priced when we accept it and that price never changes. A rate that goes up or down only affects what you send next.
Can I get a rate by agreement instead?
Yes — for sustained volume we set a fixed rate that does not expire and is not affected by the window at all. Talk to us before you commit to a large top-up.
Sandbox is free and unlimited. No card to start.