Margin-first wholesale. Built for resellers.

Voice, SMS, airtime, eSIM and numbers from one wholesale partner, with one integration, one invoice and one support contact. Tell us your corridors and we will send a rate deck.

Contact us

Five revenue streams. One wholesale relationship.

Most resellers manage multiple wholesale accounts across fragmented providers. Callvox consolidates all five product lines, so you can offer clients more while cutting back-office overhead.

Voice

Direct routes

SMS

A2P messaging

Airtime

1700+ operators

eSIM

Profiles by API

DIDs

Virtual numbers

Your brand. Our infrastructure.

Branded portal

White-label client portal under your domain and brand. Your clients see your product, not ours.

Automated billing

Billing engine handles invoicing, usage alerts, and payment collection for your downstream clients. Configurable markup per client.

Multi-tenant management

One portal to manage all your clients. Individual rate plans, usage limits, and CDR access per tenant.

API-first. SMPP + REST.

Voice API
SIP trunk, CDR API
SMS
REST + SMPP v3.4/5.0
Airtime
REST API, webhook delivery
DIDs
REST API
Billing API
Usage data, invoice generation, balance queries
CDRs
Per-tenant, exportable JSON/CSV
Webhooks
Delivery receipts, usage alerts, balance warnings
Auth
API keys per sub-account, IP whitelisting
POST /v1/accounts/sub-accounts HTTP/1.1
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "name": "Client ABC"
}

---

GET /v1/accounts/sub-accounts/{id}/usage?month=2026-04 HTTP/1.1
Authorization: Bearer YOUR_API_KEY

{
  "voice_minutes": 125430,
  "sms_count": 89023,
  "airtime_value": 34500
}

What are you reselling, and where?

Tell us your corridors and expected volumes and we will come back with a rate deck.

Contact us