Sopro vs Belkins: A Published Starting Price or an Unpublished Retainer?

Sopro vs Belkins at a glance

I run cold email and LinkedIn outreach for B2B clients myself, several of them selling into the UK and the rest of Europe, which is exactly the market Sopro is built around. Treat what follows as a competitor's read rather than a neutral referee's. The facts below come from Sopro's own pricing page and Belkins' own pricing page, both checked directly on 8 November 2026.

How much does each one actually cost?

Sopro's own pricing page states plainly that "pricing starts at around €3.4K per month" and that "there's no minimum contract." It does not publish a tier table or a ceiling, since it frames every engagement as "totally bespoke" to the client's audience and campaign. That starting figure is the one hard number either site puts in writing.

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

Channels: what's actually included

Sopro runs a wider channel mix than most agencies this size: email and LinkedIn outreach, phone follow-up, web chat, and its own display advertising product (it calls this "Audience AdSync"), plus intent tracking meant to flag accounts already showing buying signals, according to its own site. Belkins keeps cold email and LinkedIn as the baseline in every tier, and adds intent based calling (triggered by a signal, not a cold dial list) from the Growth tier up. Full cold calling, account based marketing, paid ads and webinar support are Growth Plus and Enterprise only.

In my own practice, email and LinkedIn run as one sequence rather than separate tracks with separate owners, and the first email in that sequence runs 30 to 40 words with one concrete problem and one concrete offer. Sopro's channel list reads closer to that coordinated model, phone and chat layered onto the same campaign rather than sold as a separate add-on. Belkins' channel list reads more like a menu that expands by tier, useful if you know up front exactly which channels you need and want to pay only for those.

Which one is built for GDPR heavy EU prospecting?

Sopro puts a specific compliance program in writing on its GDPR and PECR FAQ: every employee gets GDPR and PECR training at onboarding, a named compliance officer and third party compliance expertise audit campaigns, and a subject access request sent to its DPO gets a response within 72 hours. That level of detail makes sense given its UK base and the UK and EU clients it says it serves.

Belkins' own site names no equivalent compliance program. Its legal footprint is a Dover, Delaware registration, and its case studies and language lean US facing, with no stated EU data handling process. That doesn't mean it can't run a compliant EU campaign, only that Sopro is the one of the two actually putting its compliance process in writing where a buyer can check it before signing.

Team, size and markets

Sopro states it has 300+ staff, with its main offices in Brighton, UK and Skopje, North Macedonia, plus a US representative office in Miami, and that it has worked with 3,375+ clients across 22,839 campaigns since founding in 2015, all per its own homepage and about page. Belkins' homepage claims it has "helped clients generate $2B+ in revenue" since 2017 and serves 50+ industries, but its only stated legal address is a registered agent office in Dover, Delaware, and its site does not name where its delivery team actually sits.

If your buyers are concentrated in Europe specifically rather than split across the US and Europe, it's worth reading what outsourced SDR services actually cost by European market before comparing either agency's number against a European benchmark instead of a US one.

Track record and reviews

Both agencies carry a sizeable public review trail across more than one platform, G2, Trustpilot and Capterra list reviews for Sopro, Clutch lists reviews for Belkins, and the sentiment on each is mixed rather than uniform: strong marks for execution and account management sit alongside complaints about cost or lead quality on both. I'm not citing scores or review counts here, the same rule I apply to every named agency in this blog, since a number lifted from a third party site today may already be stale by the time you read this. Read a current sample on each platform yourself rather than trusting either agency's own pull quotes.

A cost per meeting model, built on stated assumptions

Sopro's €3.4K starting price is the only number either site gives you to build a model from, so here is one, built entirely on assumptions you should swap for your own: assume a program at that starting price delivers 8 to 15 qualified meetings a month once it's past an initial ramp, a range rather than a vendor claim. That works out to roughly €225 to €425 per meeting at the lowest published price point, before you account for a likely higher real price once your actual industry and target list are scoped on a call.

Belkins gives you the opposite problem: an appointment count by tier but no price to divide by it, so a cost per appointment is impossible to build until a call produces a number. That number, not the tier name, is the one figure to get in writing before you compare Belkins against anything else on this page, a point I made the same way in Belkins vs SalesRoads, where Belkins' pricing page read identically.

Does your buyer answer the phone?

This is the fastest filter between the two. Sopro's phone channel sits alongside email, LinkedIn and chat rather than leading the sequence, so if your buyer rarely picks up an unfamiliar number, you're not paying for a channel that goes unused. Belkins only adds full cold calling from Growth Plus up, so a buyer who does answer the phone needs to confirm which tier actually includes it before assuming every Belkins engagement comes with a dialer attached.

Pick Sopro, pick Belkins, or pick neither

Pick Sopro if your buyers sit mostly in the UK or the rest of Europe, you want a written GDPR and PECR compliance process before you sign, and you'd rather start from a published number than book a call just to learn the price.

Pick Belkins if your buyers are mostly US based, you want a tier structure built around a yearly appointment count, and you don't mind a sales call before you see a figure.

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

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 meetings or appointments a program like ours produces, where the account is actually managed day to day, and your current GDPR and data handling process if we're prospecting inside the EU or UK.

FAQ