Belkins vs Callbox: An Unpublished Retainer or a Published Per-Pod Price?

Belkins vs Callbox at a glance

I run outbound for B2B clients myself, which means prospects sometimes show me a quote from an agency like one of these before they sign, and ask whether the number makes sense. I have no retainer with either company, and the facts below come from Belkins' own pricing page and Callbox's own pricing page, checked on 18 October 2026.

How they charge

Belkins sells four packages tied to a yearly appointment count, with no figure attached to any of them on its pricing page:

Callbox puts an actual range on its pricing page: $16,000 to $32,000 a month for one Campaign Pod, a subscription rather than a per lead or per meeting fee. Its own FAQ names the variables behind that range as "target industry, campaign complexity, geographic reach, and sales cycle length." A pod includes one dedicated SDR, AI enriched contact data, a campaign manager and weekly reporting, and clients can add more pods to cover more segments or regions.

Channels: phone led or no phone at all

Callbox runs calling as a core channel in every pod, alongside email, LinkedIn and social outreach, web retargeting, chat and event and webinar support, according to its own site. Belkins keeps cold calling and voicemail out of its cheapest two tiers entirely; a buyer on the Small Business or Growth plan gets cold email, LinkedIn and intent based calling (calling triggered by a buying signal, not a cold dial list), with full cold calling added only at Growth Plus and Enterprise.

In my own practice, the first message in a sequence runs 30 to 40 words with one concrete problem and one concrete offer, and email and LinkedIn move together as one sequence rather than separate tracks with separate owners. Neither agency here runs it quite that way: Callbox leads with a live call, and Belkins' own channel list reads as a menu assembled by tier rather than one coordinated sequence. If your buyers pick up the phone, that difference barely matters. If they don't, a phone first model is the wrong starting point regardless of what else is in the pod.

Who actually does the work

Belkins assigns what it calls a "Center of Excellence" per client, covering account management, SDRs, lead research and copywriting, though its cheapest tier is explicitly "delivered through partnering agencies from the Belkins ecosystem" rather than Belkins' own staff, worth asking about directly if that's the plan you're pricing. Callbox's pod model is staffed largely out of the Philippines, with a Customer Success Manager, Production Manager, SDRs, research and data analysts and digital marketers around each pod, per its own pricing page. The distinction between the person who books a meeting and the person who later closes it is worth knowing before you compare either model to a hire; I cover that split in appointment setter vs SDR.

Markets and languages

Belkins calls itself a US focused agency with reach across 50+ industries on its own homepage, and its site lists no other region or language by name. Callbox claims teams across the US, UK, Australia, Singapore, Malaysia, Hong Kong and Colombia, campaigns in 60+ countries, and outreach delivered in languages that include Thai, Bahasa, Vietnamese, Mandarin, Filipino, Portuguese and Spanish, according to its own homepage. If your buyers sit mostly in Europe, neither of these is built around that market specifically, and it's worth reading what outsourced SDR services actually cost by European market before you compare further.

Question 1: how much certainty do you need before you sign

Callbox's $16,000 to $32,000 range lets you build a number today. Assume, as a stated assumption rather than a vendor claim, a pod delivering 10 to 25 qualified appointments a month: that range works out to roughly $640 to $3,200 per appointment, a span wide enough that the real number only comes from asking Callbox what their typical pod produces for your industry and list size. Swap in whatever volume your own market would realistically support before you treat either end of that math as a plan.

Belkins gives you the opposite problem: a tier tied to a yearly appointment count but no price to divide by it, so you cannot build a cost per appointment figure at all until a call produces a number. That number, not the tier name, is the one thing to get in writing before you compare Belkins to anything else on this page.

Question 2: does your buyer answer the phone

This is the fastest filter between the two. If your buyers are the kind who pick up an unfamiliar number, a phone led pod gives Callbox more at bats per week than an email and LinkedIn sequence alone. If a cold call to your buyer's role rarely connects, calling adds cost without adding a working channel, and Belkins' lower tiers, which skip cold calling and keep to email, LinkedIn and intent based calling, are the closer fit of the two.

Question 3: how many markets are you entering at once

Callbox's pod structure is built to add a second or third unit as you expand into a new region or language, each one presumably priced in the same $16,000 to $32,000 band, though I found no published multi pod discount on its site, so ask directly rather than assuming one. Belkins doesn't publish a multi market structure at all; its site names no region outside the US, so a buyer selling into several countries at once would need to confirm on the call whether Belkins' team and copy can actually run outside an English speaking, US facing market.

Question 4: who runs it day to day, and from where

Ask both agencies to name the person, not just the title, who owns your account, and where that person sits. Belkins' partner delivered Small Business tier and Callbox's largely Philippines based pods are each a reasonable model, but only if you know that going in rather than discovering it after the first month of reports. Neither site states who keeps the domains, call recordings or lead lists if you leave, which is the same blind spot I've written about in who owns your domains when you cancel an outbound agency.

Pick Belkins, pick Callbox, or pick neither

Pick Belkins if your buyers are mostly US based, you want LinkedIn in the sequence without cold calling attached, and you're fine getting your number after a call rather than reading it on the page.

Pick Callbox if your buyers answer the phone, you're entering several countries or languages at once, and you want a published price range to start budgeting against today.

Look past both if your deal size can't carry a five figure monthly fee, your offer hasn't been tested yet, or what you actually want is to own the system yourself rather than rent someone else's. For that last case, read when hiring an outbound agency is the wrong call before you book either demo, and compare the agency route against building in house in fractional SDR vs agency.

What to ask both before you sign

Send both the same note before the second call, so the answers come back comparable:

Hi [Name], before our next call, could you send me a few things in writing? The total monthly cost for our scope, the typical number of qualified appointments a pod or program like ours produces, who owns the account day to day and where they're based, and who keeps the domains, data and call recordings if we stop.

For the fuller background on each agency on its own, see my Belkins review and Callbox review.

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