If you’re a managed service provider looking at the telecom channel for the first time, you’re about to discover that picking a TSD (technology services distributor) is one of those decisions that’s easy to make and hard to undo. Your TSD holds your commissions, provides your quoting tools, manages your carrier relationships, and if things go sideways, determines whether you get paid. It’s not a vendor. It’s more like a business partner you didn’t get to interview very thoroughly before signing.

And here’s the thing most people won’t tell you: the best TSD for a traditional telecom agent is not necessarily the best TSD for an MSP. Agents need carrier access and quoting tools. MSPs need all of that plus billing integration, white-label capability, PSA/RMM connectivity, and a security vendor portfolio that goes beyond “we have Palo Alto and CrowdStrike on our line card.” The evaluation criteria are different because the business model is different.

Let’s break down what matters and who does it well.

What MSPs need that traditional agents don’t

Before we rank anyone, let’s establish the scorecard. When a pure-play telecom agent evaluates a TSD, they’re mostly asking: which carriers do you have, what are the commission splits, and how good is your quoting tool? Fair enough. Those matter for MSPs too. But MSPs have a longer list.

PSA/RMM integration is the big one. If you run your business on ConnectWise, Datto Autotask, or HaloPSA, you need your telecom services to show up in the same workflows. Can the TSD push provisioning data into your PSA? Can billing sync automatically? If the answer is “you can export a CSV,” that’s not integration. That’s a manual process wearing a costume.

White-label options matter because MSPs sell under their own brand. Your customer thinks they’re buying internet from you, not from a carrier they’ve never heard of. The TSD needs to support white-label billing, white-label portals, and ideally white-label support. Not all of them do, and the ones that claim to often deliver something half-baked.

Billing integration is another pain point. Telecom billing is notoriously messy. Circuits install on random dates, MRC changes mid-cycle, carriers send credits months after disputes. If the TSD can’t normalize this into something your billing system can ingest, you’re going to spend hours each month reconciling spreadsheets. I’ve talked to MSPs who hired a part-time bookkeeper just to deal with telecom billing. That shouldn’t be necessary.

Your TSD’s cybersecurity vendor portfolio also matters more than it did two years ago. MSPs are increasingly selling managed security (SASE, MDR, email security, identity management). If your TSD only has two or three security vendors, you’ll end up going direct for the rest, which fragments your commission tracking and support experience.

And finally, technical pre-sales engineering. MSPs get pulled into complex network designs. Can the TSD provide a solutions engineer who actually understands SD-WAN failover, SIP trunk configuration, or ZTNA architecture? Or do they just hand you a carrier brochure and wish you luck?

With that scorecard, here’s how the top TSDs stack up for MSPs in 2026.

Telarus: the biggest portfolio, strongest engineering

Telarus is the largest independent TSD in the channel, with over 300 supplier partners and somewhere north of $5 billion in annual billings flowing through their platform. They were already big, and they keep getting bigger.

The supplier portfolio is massive. If a carrier or vendor exists in the telecom/cloud/security space, Telarus probably has an agreement with them. Their GeoQuote tool is useful for multi-location connectivity deals: plug in addresses and it pulls real-time pricing from dozens of carriers. But the real differentiator for MSPs is engineering support. Telarus has a deep bench of solutions engineers who can help you design SD-WAN overlays, scope contact center deployments, and build out security architectures. For MSPs who don’t have a full-time network engineer on staff, this is like getting a fractional SE for free. It’s one of the best perks in the channel and a lot of partners don’t take full advantage of it.

The downside is that size creates bureaucracy. Telarus manages thousands of partners, and newer or smaller partners sometimes feel like a number. The onboarding process can be slow. Commission tracking is generally reliable, but with that volume of transactions, errors happen, so audit your statements. And while their tools are strong for connectivity quoting, the MSP-specific features (billing integration, white-label) aren’t as polished as what you’ll find at AppDirect. If white-labeling is central to your model, Telarus will frustrate you.

Bottom line on Telarus: best for MSPs who sell a lot of connectivity and SD-WAN alongside their managed services, especially multi-location enterprise deals. If you need deep carrier access and don’t want to sacrifice engineering support, Telarus is hard to beat.

Avant: advisor-first, strong in UCaaS and CCaaS

Avant positions itself as a platform for “trusted advisors” rather than traditional agents. Their Pathfinder quoting tool is widely regarded as one of the best in the channel, and they’ve invested heavily in marketing support and partner enablement.

Pathfinder is the standout. It’s a clean, modern quoting platform that pulls pricing across carriers and lets you build professional proposals quickly. For UCaaS and CCaaS specifically, Avant’s supplier relationships are strong. They often get preferred pricing or early access to new carrier programs. Their marketing support is above average too: co-branded content, campaign tools, and a team that actually helps you build pipeline rather than just emailing you a logo kit. Avant also runs solid educational events and has a community of advisors who share knowledge. That community piece is underrated.

Where Avant falls short for MSPs is operational depth. Avant’s DNA is telecom advisory, not MSP enablement. If you’re looking for deep PSA integration, automated billing sync, or a white-label marketplace, Avant isn’t built for that. They’re great at helping you quote and close telecom deals, but the operational backend that MSPs need for service delivery is thinner. Their security portfolio has grown but still trails Telarus in breadth. And the “advisor” branding, while intentional, can feel like a mismatch if you’re an MSP that wants to embed telecom into your managed services stack rather than operate as a standalone advisor.

Best for MSPs who are adding telecom advisory as a revenue stream alongside their managed services, rather than deeply integrating telecom into their service delivery. If your model is “we manage your IT and we also advise on your telecom,” Avant is excellent. If your model is “we deliver telecom as a managed service under our brand,” look at AppDirect instead.

AppDirect: built for MSPs from the ground up

AppDirect took a different path than traditional TSDs. Instead of starting as a master agent and adding MSP features, they built a cloud commerce platform designed for service providers. They’ve acquired several companies to fill gaps (billing platforms, marketplace technology, advisor businesses) and stitched it together into something that looks more like an MSP operating system than a traditional TSD.

This is the TSD that takes the MSP use case most seriously. White-label marketplace? Built in. Billing integration with major PSA platforms? Yes. The ability to bundle telecom, cloud, and security products into a single customer invoice under your brand? That’s the whole pitch. AppDirect also offers a self-service marketplace where your customers can provision certain services directly, which reduces your support burden. For MSPs who want to operate telecom as a true managed service, where the customer sees your logo on every bill and portal, AppDirect is the most purpose-built option. Nobody else is as far along on this.

The tradeoffs are real, though. The carrier portfolio is smaller than Telarus or Avant. AppDirect has the major carriers covered, but if you need a niche regional fiber provider or a specialized MPLS carrier, you might not find them on the platform. The tools, while powerful, have a learning curve. The platform tries to do a lot, and the initial setup takes more effort than signing up with a traditional TSD and quoting your first deal. Engineering support exists but doesn’t match Telarus’s depth. And because AppDirect is trying to be a platform rather than a partner, the relationship can feel more transactional. You’re a user, not a buddy.

Best for MSPs who want to sell telecom, cloud, and security under their own brand with integrated billing and provisioning. If you’re building a true services practice and need the back-office infrastructure to support it, AppDirect is the most MSP-native option in the market.

Sandler Partners: transparency and back-office reliability

Sandler Partners has been in the master agent business for over two decades and has built a reputation on two things: transparent commission tracking and a loyal partner base. They’re not the flashiest TSD, but the partners who work with them tend to stay. That tells you something.

Commission accuracy and transparency are Sandler’s calling card. Their reporting is detailed, their back-office team is responsive, and when there’s a discrepancy, they investigate it rather than making you prove the error. For MSPs who are building a residual book and want confidence that they’re getting paid correctly, this matters more than any quoting tool. I’ve heard more horror stories about commission errors at other TSDs than I can count. Sandler partners rarely tell those stories. Sandler also has a solid carrier portfolio (not the largest, but deep enough for most use cases) and their support team is accessible in a way that bigger TSDs sometimes aren’t. If you call Sandler, a human answers.

The technology platform lags behind Telarus, Avant, and AppDirect. Sandler’s quoting tools are functional but not flashy. MSP-specific features like billing integration and white-label are limited. Marketing support is adequate but not a differentiator. If you’re evaluating TSDs purely on platform capability, Sandler won’t win. They win on trust, reliability, and the unsexy fundamentals of running a commission business correctly. Sometimes unsexy is exactly what you need.

Best for MSPs who prioritize getting paid correctly over having the slickest tools. Partners who’ve been burned by commission errors at other TSDs tend to end up at Sandler. Also good for smaller MSPs who want a responsive, relationship-driven TSD rather than a self-service platform.

Intelisys (ScanSource): the OG with hardware distribution

Intelisys pioneered the master agent model and was one of the first to formalize the TSD business. ScanSource acquired them in 2016, which added hardware distribution capabilities to Intelisys’s telecom and cloud brokerage. That combination is unique in the market.

The carrier portfolio is broad and deep. Intelisys has been building supplier relationships for over 25 years, and it shows. But the real differentiator for MSPs is the ScanSource connection. If you sell both connectivity and hardware (routers, switches, firewalls, phones), Intelisys is the only major TSD where you can source both through a single parent company. That simplifies procurement and can improve margins through bundled programs. Intelisys also has a strong training program. Their Cloud Services University is useful if you’re ramping up new hires or getting your team certified on unfamiliar product categories. The partner community skews more technical than the average TSD’s base, which means the peer conversations are better.

The ScanSource acquisition created integration challenges that, frankly, are still being worked out years later. The telecom brokerage side and the hardware distribution side don’t always communicate seamlessly, and the promise of “one platform for everything” hasn’t fully materialized. It’s getting better, but it’s not there yet. The quoting tools are middle-of-the-pack. Commission tracking is generally reliable but the reporting interface feels dated. And while the combined hardware-plus-telecom value proposition is compelling on paper, in practice you’re often still dealing with two separate teams within the same company.

Best for MSPs who sell a mix of connectivity, cloud services, and physical hardware. If you’re deploying SD-WAN appliances alongside SD-WAN circuits, or selling phone systems alongside UCaaS licenses, the ScanSource/Intelisys combination gives you a single ecosystem. Just know that “single ecosystem” still has some seams.

TBI: enterprise deals, high-touch support

TBI is a privately held TSD that focuses on mid-market and enterprise business. They’re smaller than Telarus or Avant by revenue, but they punch above their weight in deal size and partner satisfaction.

TBI’s support model is high-touch in a way that’s increasingly rare. Partners get dedicated channel managers who know their business, and the pre-sales engineering team is responsive and competent. For complex enterprise deals (multi-site SD-WAN, large contact center deployments, hybrid network designs) TBI’s support team can make the difference between winning and losing the deal. Their carrier relationships are strong, particularly with AT&T, Lumen, and Comcast Business, and they often have access to aggressive pricing on larger deals. TBI also has a reputation for going to bat for partners during commission disputes. That’s worth more than any quoting tool, and it’s the kind of thing you only appreciate after you’ve been through a dispute at a TSD that didn’t fight for you.

The technology platform is not TBI’s strength. Their quoting tools and partner portal are functional but not modern. If you’re used to Pathfinder or GeoQuote, TBI’s tools will feel basic. The supplier portfolio, while strong in traditional telecom and major cloud providers, is thinner in cybersecurity and emerging technology categories. MSP-specific features like billing integration, white-label, and PSA connectivity are limited. And because TBI is smaller, they have fewer resources for marketing support and partner enablement compared to the big three.

Best for MSPs that focus on mid-market and enterprise customers where deal complexity requires real engineering support. If your typical deal is $10,000+ MRC with multiple locations and multiple products, TBI’s high-touch model is worth the tradeoff on tooling. Less ideal for MSPs that do high-volume SMB business and need platform automation.

How to actually make this decision

Here’s a framework that cuts through the noise.

If you’re an MSP that wants to white-label telecom as a managed service, start with AppDirect. Their platform is built for this use case. Supplement with Telarus if you need broader carrier access.

If you’re adding telecom advisory as a side revenue stream, go with Avant or Telarus. Both have strong quoting tools and good enablement programs. Lean toward Avant if you’re UCaaS/CCaaS-heavy, Telarus if you need more connectivity and engineering support.

If you sell both hardware and connectivity, Intelisys/ScanSource is the logical starting point, with the caveat that the integration isn’t seamless yet.

If you’re small and want to trust your TSD completely, go with Sandler Partners. You might give up some tooling, but you’ll gain confidence that your commissions are accurate. That peace of mind is worth more than people realize.

If you do big, complex enterprise deals, TBI. The engineering support and carrier relationships justify the simpler tooling.

One thing nobody tells you: you can work with more than one TSD. Most partners start with one, but experienced partners often have relationships with two or three. They’ll use Telarus for connectivity, AppDirect for white-label billing, and keep a Sandler relationship for specific carriers. There’s nothing wrong with this, though it adds operational complexity. My advice: start with one, learn the ropes, and add a second only when you hit a specific gap your first TSD can’t fill.

The questions to ask before you sign

Before committing to any TSD, get clear answers on these:

  1. What’s the commission split, and how does it change as I grow? Most TSDs offer tiered splits. Know the starting point and the escalation thresholds.

  2. What happens to my book if I leave? This is the most important question in the relationship. Get it in writing. If they’re vague here, walk.

  3. Do you integrate with my PSA? Don’t accept “we’re working on it.” Ask for a demo or a reference customer who’s done it.

  4. How do you handle commission disputes with carriers? Ask for a specific example of how they resolved one. The answer tells you everything about how they’ll treat you when it matters.

  5. What’s your cybersecurity vendor portfolio? Get the full list. If it’s short, that’s a gap you’ll have to fill elsewhere.

  6. Can I white-label billing and customer portals? If this matters to your model, verify it works before you sign, not after.

  7. Who’s my day-to-day contact, and what’s their partner load? A channel manager handling 200 partners isn’t going to give you the same attention as one handling 40. Ask the number.

The right TSD makes your business more efficient and more profitable. The wrong one creates friction that compounds over time, just like residual commissions, except in the wrong direction. Take the evaluation seriously. Talk to partners who already work with each TSD. And read the contract before you sign it, especially the termination clauses.

Your TSD holds your income. Choose accordingly.

The Telecom Channel Glossary — MRC, TCV, SPIF, RFP, NNI, MACD — the channel runs on jargon. Guide 7 is a plain-English glossary of every acronym and term you’ll encounter in your first year.