Who Are the Best Wholesale Telecom Providers?
If you’re searching for the best wholesale telecom providers, you’re usually trying to do one of two things:
Buy carrier-grade connectivity (numbers, origination, termination, messaging, E911) at scale, or
Build a scalable business on top of that connectivity as an MSP, ITSP, or reseller.
Most providers can help with #1. Far fewer help with #2.
Below is a practical shortlist of wholesale telecom providers that consistently show up in real-world builds, plus a clear explanation of why Viirtue belongs at the top of the list for MSPs that want more than dial tone. (Viirtue)
Best wholesale telecom providers at a glance
Here are strong options, grouped by the type of buyer they fit best:
Best overall for MSPs and resellers (platform + wholesale): Viirtue
Best for carrier-grade APIs and BYOC: Bandwidth
Best for developer-first SIP trunking and Dynamic E911: Telnyx
Best for scaled wholesale voice and global network services: Sinch (Voice)
Now let’s make this decision easier by defining what “best” should mean in wholesale telecom in 2025 and beyond.
Table of Contents
What is a “Wholesale Telecom Provider”?
A wholesale telecom provider sells telecom capabilities (voice, messaging, numbering, emergency services, interconnection) to other businesses that package and deliver services to end customers.
In the VoIP world, that typically includes:
Phone numbers (DIDs), toll-free, and inventory management
SIP trunking (origination and termination)
Messaging (SMS/MMS, A2P routes, 10DLC tooling)
Emergency calling (E911 / Dynamic E911)
APIs and portals for provisioning, routing, and reporting (carrierservices.sangoma.com)
The difference between “good” and “best” is rarely just call completion. It’s everything operational that happens before and after a call.
What makes a wholesale telecom provider “the best” today?
If you are an MSP or reseller, use this checklist. The “best” provider is the one that reduces risk, shortens time-to-revenue, and keeps billing clean.
1) Network quality and reach
You want proven routing, redundancy, and scale. This matters even more if you support contact centers, healthcare, legal, or any business where missed calls become escalations.
2) Numbers and porting that don’t destroy your margins
If porting is manual, ticket-heavy, and slow, your team becomes the bottleneck (and your customer experience suffers).
3) E911 and compliance tooling
E911 is not optional. Providers differentiate in how easy they make address management, dynamic location handling, and auditability. (Telnyx)
4) Messaging, trust, and abuse controls
Between spam regulations and brand trust initiatives, messaging is increasingly about compliance and governance, not just delivery.
5) Fraud controls
Wholesale voice attracts fraud. Your provider should help you prevent it (not just send you a bill after it happens).
6) STIR/SHAKEN readiness and call authentication realities
STIR/SHAKEN is the industry framework for caller ID authentication. You need a provider that understands the call chain obligations and can help you operationalize them. (Federal Communications Commission)
7) Automation (not just APIs)
APIs are great, but most MSPs don’t want to build an internal telecom product team just to run quoting, taxes, rating, and billing.
8) Billing, rating, and taxes (the real profit killer)
If your “wholesale provider” forces you into spreadsheets or bolt-on systems for usage rating and telecom tax handling, your growth slows, and disputes climb.
That’s the gap Viirtue is built to close.
The Shortlist: Best Wholesale Telecom Providers (and Why)
1) Viirtue: best for MSPs who want a business, not just connectivity
Viirtue positions itself as an all-in-one white-label VoIP platform for MSPs and IT providers, built for channel partners (not direct-to-end-user).
What makes Viirtue different is simple:
Viirtue gives you dial tone and the platform to sell it.
Instead of handing you a voice route and saying “good luck,” Viirtue layers a quote-to-cash engine on top of wholesale telecom so you can run the business side without stitching together five tools.
Notable strengths to call out in your evaluation:
ViiBE quote-to-cash and orchestration: quoting, invoicing, and payment workflow in the same partner platform, positioned as included for Viirtue partners.
Automated usage rating: designed to calculate usage automatically per billing cycle. (Viirtue)
Telecom tax automation: positioned to simplify phone tax calculation across jurisdictions. (Viirtue)
Self-service number operations: number ordering, porting workflows, and CNAM controls designed for partner self-service. (Viirtue)
Channel-first positioning: Viirtue states it serves MSPs and refers end customers back to partners. (Viirtue)
If your goal is to launch or scale a white-label voice practice profitably, these “non-network” capabilities are exactly what separates a wholesale platform from a wholesale pipe.
2) Bandwidth: Best for Carrier-grade Voice, Messaging, and Emergency APIs
Bandwidth is a strong option if your team is API-first or you are building communications into software (UCaaS, CCaaS, embedded voice, BYOC models). Bandwidth highlights voice, messaging, and emergency APIs and positions itself around network-backed services. (Bandwidth)
Where Bandwidth fits best:
BYOC (Bring Your Own Carrier) connectivity for UCaaS/CCaaS providers. (Bandwidth)
Programmable voice via Voice API (inbound/outbound calling use cases). (Bandwidth)
Messaging APIs with global reach options and published uptime claims. (Bandwidth)
Bandwidth also acquired Voxbone (and completed the acquisition in 2020), which is relevant for buyers thinking about international footprint and unified capabilities. (investors.bandwidth.com)
If you want a carrier-grade foundation and you have the engineering and ops maturity to build the business layer yourself, Bandwidth is often on the shortlist.
3) Telnyx: Best for Developer-friendly SIP Trunking Plus Dynamic E911 Options
Telnyx is a strong fit when you want to move fast with SIP trunking and self-serve configuration, and you care about emergency calling tooling.
Telnyx highlights:
Global SIP trunking positioning (Telnyx)
Dynamic E911 guidance for SIP trunking (including API-based addresses and geolocation approaches) (Telnyx)
Broader educational content around E911 compliance and simplification (Telnyx)
If your organization is technical and wants a modern portal + docs experience, Telnyx is worth evaluating.
4) Sinch (Voice): Best for Scaled Wholesale Voice and Global Service Reach
Sinch operates a large communications footprint and offers “Global Voice” capabilities with claims around direct connections and market availability. (Sinch)
Sinch positions its global voice services around:
Direct connections in 60+ countries and local number availability in 70+ markets (Sinch)
Enterprise-grade network positioning for quality and reach (Sinch)
Sinch also completed the acquisition of Inteliquent in 2021, which matters for buyers mapping brand families and legacy wholesale voice footprints. (Sinch Investors)
If your primary need is scaled wholesale voice interconnection and broad reach, Sinch belongs in the conversation.
Why “Tier 1 Dial Tone + Voice APIs” Is Not Enough for MSPs Anymore
Tier 1 carriers and API-first providers are great at what they do: connectivity.
But MSPs and telecom resellers usually lose time and margin in places like:
quoting changes and contract revisions
porting paperwork and status chasing
prorations, usage disputes, and rating mistakes
telecom taxes and compliance details
slow onboarding that turns wins into cancellations
In other words, your customer does not churn because of SIP. They churn because the experience around SIP is messy.
That’s why a provider that combines wholesale telecom with quote-to-cash automation can win even when everyone’s “dial tone” sounds the same.
Why Viirtue Stands Out From the Pack
Most wholesale telecom providers give you the basics: numbers, origination, termination, and maybe a few voice or messaging APIs. Everything else — quoting, billing, taxes, provisioning, and the operational heavy lifting — is left for your team to figure out.
Viirtue takes a different approach.
You still get the wholesale voice foundation, but it’s paired with ViiBE, a partner platform that brings quoting, invoicing, usage rating, and telecom tax automation into one workflow. The result is cleaner billing, fewer disputes, and far less revenue slipping through the cracks.
On the operational side, Viirtue delivers true self-service: number ordering, porting workflows, CNAM controls, and other tools designed so MSPs don’t spend their day buried in tickets or spreadsheets.
And because Viirtue is built for the channel, not direct-to-consumer sales, partners keep full ownership of the customer relationship.
This is the real difference between purchasing a wholesale route and building a scalable, profitable telecom practice.
Typical Wholesale Provider vs. Viirtue
| Category | Typical Wholesale Provider | Viirtue |
|---|---|---|
| Core Offering | Sells numbers, origination, and termination | Provides wholesale voice plus a full partner platform |
| APIs | May offer basic voice or messaging APIs | Full stack including quoting, billing, usage rating, and tax automation |
| Quoting & Invoicing | Left for the MSP to build manually | Automated quoting and invoicing inside ViiBE |
| Usage Rating | Often missing; requires spreadsheets or bolt-ons | Built-in usage rating designed to prevent revenue leakage |
| Telecom Taxes | MSP must manage tax calculation separately | Automated telecom tax handling included in the platform |
| Number Management | Limited self-service; ticket-heavy | Self-service ordering, porting workflows, and CNAM controls |
| Operational Workflows | Fragmented across multiple tools | Centralized in ViiBE for faster time-to-revenue |
| Partner Model | Often sells direct to end users | Channel-first; supports MSPs exclusively |
| Scalability | Hard to scale without building internal systems | Purpose-built to help MSPs grow efficiently and profitably |
A Practical Buyer Checklist (Use This When You Shortlist Providers)
When you evaluate any wholesale telecom provider, ask these questions:
Numbers: Can I search, reserve, and assign inventory quickly? (Viirtue)
Porting: Is there a real self-serve workflow, or is it ticket-driven? (Viirtue)
E911: How do we manage addresses, dynamic location, and compliance reporting? (Telnyx)
Messaging: What are the trust/compliance requirements, and how much does the provider help?
Fraud controls: What proactive mitigation exists? (carrierservices.sangoma.com)
STIR/SHAKEN: How do you handle caller ID authentication responsibilities across the call chain? (Federal Communications Commission)
Billing: Do you provide usage rating and clean invoicing outputs, or do I build it? (Viirtue)
Taxes: Is telecom tax calculation automated, or is this “on me”? (Viirtue)
Partner model: Do you sell against me, or do you only enable partners? (Viirtue)
Time-to-revenue: How fast can I quote, close, provision, and bill accurately?
Final Thoughts: Best Wholesale Telecom Providers
Choosing the best wholesale telecom provider isn’t just about dial tone anymore. MSPs and resellers need a partner that strengthens margins, simplifies operations, and reduces the risks that come with billing, taxes, and provisioning.
The providers in this guide all deliver pieces of that equation, but only a few help you build a telecom practice that scales cleanly.
That’s where Viirtue stands out. By combining wholesale voice with ViiBE’s quote-to-cash automation, usage rating, tax handling, and self-service operations, Viirtue gives MSPs a platform built for long-term growth rather than short-term fixes. It’s a modern approach to wholesale telecom that removes the friction points that slow teams down and erode customer experience.
If you’re ready to evaluate wholesale telecom providers based on what actually drives profit — automation, accuracy, speed, and partner alignment — Viirtue.com is the best place to start.
The fastest path to a scalable, channel-owned telecom offering begins with choosing a partner built for your business, not just your dial tone.
FAQ: Best Wholesale Telecom Providers
Which wholesale telecom provider is best for MSPs?
If your goal is to resell under your own brand and avoid building a billing and compliance stack from scratch, Viirtue is purpose-built for MSPs, positioning ViiBE as a quote-to-cash platform with usage rating and telecom tax automation included for partners. (Viirtue)
Which provider is best if I only need voice APIs?
Bandwidth and Telnyx both publish strong API-first capabilities (voice APIs, SIP trunking, emergency calling tooling). (Bandwidth)
What is BYOC and why does it matter?
BYOC (Bring Your Own Carrier) lets a UCaaS/CCaaS platform use a separate carrier for PSTN connectivity. Bandwidth explicitly positions BYOC for UCaaS/CCaaS and conferencing use cases. (Bandwidth)
Do wholesale providers handle E911?
What is STIR/SHAKEN?
STIR/SHAKEN is the industry framework for caller ID authentication intended to combat spoofed robocalls. (Federal Communications Commission)
Is “best” the same as “cheapest” in wholesale telecom?
Rarely. Cheapest minutes can become expensive once you factor in porting overhead, billing disputes, tax errors, and compliance work. The best provider reduces total operational cost, not just per-minute cost.
