What's in the stack.
Voice infrastructure, integration layer, codecs, and platform reliability — operated end-to-end under one contract.
Voice infrastructure
DID provisioning across 25 active markets. CLI, NCLI, and TDM termination routes. Multi-carrier failover at matched quality — not degraded fallback.
PBX and dialer integration
3CX, Asterisk, FreePBX, FreeSWITCH, Magnus Billing, and standards-compliant auto-dialer platforms. IP-to-IP or SIP credentials. Custom CRM integration through API where a dedicated SIP trunk exists, or via the auto-dialer layer.
Codecs
G.711 a-law, G.711 μ-law, G.729. G.722 not supported.
Platform reliability
99.9% platform-side uptime SLA. One historical carrier-side incident, resolved in 1 to 1.5 hours through automatic routing failover.
Pricing model:
traffic and numbers,
engineering not billed separately.
VoipTower bills for traffic and numbers. There are no per-hour engineering fees, no integration retainers, no partner kickbacks. Setup, configuration, monitoring, and 24/7 support come with the rates — not on top of them.
| You pay for | Included with the contract |
|---|---|
| DID numbers (setup + monthly) | Number provisioning and routing configuration |
| Outbound traffic (per-minute) | Custom CRM integration (API or via auto-dialer) |
| Inbound termination | 3CX, Asterisk, FreePBX, FreeSWITCH setup |
| — | Auto-dialer integration with partner platforms |
| — | Routing, IVR, failover configuration |
| — | KYC token — onboard once, re-orders in hours not days |
| — | Compliance review at submission |
| — | Monitoring and 24/7 engineering support |
Production traffic across
e-commerce, customer support,
regulated fintech, logistics.
Real performance numbers across verticals and markets. Full per-country breakdowns — ASR by call type, PDD ranges, market context — live on the respective country pages.
Netherlands TDM with active number replacement
Continuous spam-flag monitoring. When recipient carriers begin labeling a number, routing shifts automatically to a fresh number from the customer's pool. No re-submission of documents.
Romania active customer outreach, PDD 2.88s
Warm outreach to verified customer bases. EU jurisdiction, standard regulator path.
Argentina regulated fintech cold outbound
Sustained high-volume traffic on a regulated fintech profile. Full case data and per-month ASR profile on the Argentina country page.
Germany e-commerce — one stack, three call types
E-commerce inbound, loyal-base outreach, and cold outbound — three distinct ASR profiles operated on the same routing stack. Full breakdown on the Germany country page.
Detailed per-country case data: Argentina, Germany, and the full country list at /countries/.
The economics —
why “engineering included”
usually works out cheaper.
Voice operations cost more than the per-minute rates suggest. Build the same capability in-house and the bill includes a voice engineer, monitoring infrastructure, an on-call rotation, and the time your product team loses to phone problems that aren't their job.
The base cost of one voice engineer before monitoring, on-call coverage, and engineering management overhead.
Wholesale-grade rates for numbers and traffic, close to direct-carrier pricing. The premium pays for the team that operates the routes. Numbers themselves are not marked up — the engineering is.
The B2B traffic spend range where the managed model comes out ahead. Companies with their own voice engineering team and $100,000+ monthly traffic usually build cheaper in-house — rational at that scale. We don't try to be that vendor.
Country coverage.
25 markets with active production traffic. Geographic, mobile, national, and toll-free DID types are available where the local numbering plan permits. Full per-country capability matrix on the countries hub.
| Country | Region | Status |
|---|---|---|
| Germany | Europe | Available |
| United Kingdom | Europe | Available |
| France | Europe | Available |
| Italy | Europe | Available |
| Spain | Europe | Available |
| Netherlands | Europe | Available |
| Romania | Europe | Available |
| Switzerland | Europe | Available |
| Sweden | Europe | Available |
| Norway | Europe | Available |
| Denmark | Europe | Available |
| Poland | Europe | Available |
| Czech Republic | Europe | Available |
| Argentina | Americas | Available |
| Brazil | Americas | Available |
| Mexico | Americas | Available |
| Canada | Americas | Available |
| Colombia | Americas | Available |
| Chile | Americas | Available |
| Israel | MENA | Available |
| United Arab Emirates | MENA | Available on request |
| Saudi Arabia | MENA | Available |
| Australia | APAC | Available |
| Singapore | APAC | Available |
| South Africa | Africa | Available |
Additional markets confirmed on request during onboarding.
Onboard once.
CLI compliance always.
Documents go through compliance once. The same verified company profile applies across every future order — new countries, new routes, new numbers — and the operational form takes about five minutes per order.
A single KYC token
VoipTower issues one KYC token after the first onboarding. Re-orders inside countries where you already operate run from a pre-allocated stock held for your account. Delivery typically lands within 1 to 3 hours after the form clears. Sometimes within the hour if stock is ready. Most wholesale providers don't hold per-customer inventory, so their re-orders queue with the carrier for 24-48 hours.
Compliance review at submission
The compliance check happens when you submit, not afterwards. You qualify and proceed, or you get clear feedback within hours. Nothing sits in silent rejection.
CLI routed only for verified ownership
VoipTower routes CLI only for numbers issued through the platform or ported in with verified ownership documentation. Arbitrary caller ID is not accepted. This is the operational filter that keeps routes clean — and it self-selects the customer base.
Frequently asked
questions.
Direct answers to the questions buyers ask during evaluation.
What is VoipTower?
How is VoipTower different from Twilio or Telnyx?
How does VoipTower handle CLI compliance?
What does setup cost?
How long does it take to get live?
What documents are required to start?
Does VoipTower take commissions from CRM or dialer vendors?
Which countries are covered?
For technical questions — codecs and PBX compatibility, SLA scope, multi-carrier failover behavior, number portability — see the full FAQ.
Talk to engineering
before signing anything.
The conversation usually answers more than a sales call can.