---
title: "Callbox Alternative: What $15,000 a Month Should Buy You in Reported Numbers | Stone Haven Capital Group"
description: "Callbox estimates $15,000 to $30,000 a month per Campaign Pod. StoneHaven answers the same question with 183,524 sends in 10 days at 11.94% reply and 2.82% bounce."
canonical: "https://stonehaven.capital/alternative/callbox"
last-updated: "2026-08-30"
---

> Callbox estimates $15,000 to $30,000 a month per Campaign Pod. StoneHaven answers the same question with 183,524 sends in 10 days at 11.94% reply and 2.82% bounce.

Stone Haven Capital Group

Schedule a Call

[All comparisons](https://stonehaven.capital/alternative/)

Comparison

# Callbox Alternative: What $15,000 a Month Should Buy You in Reported Numbers

August 30, 202612 min read

Callbox estimates $15,000 to $30,000 a month for one Campaign Pod, and everything its pricing page lists in return is a staffing description: a dedicated SDR, a campaign manager, a skill team behind them, and weekly reporting. Nothing on that page is a quantity of work delivered.

This page compares Callbox with the alternatives on one axis: what each provider will tell you in numbers before you sign, and what those numbers have to look like for a five-figure monthly program to work.

StoneHaven's outbound engine booked 532 sales calls in a single month with Series A-C decision-makers, closing $379,000 in new revenue, and 445 sales calls in a separate 25-day window.

## What $15,000 a month buys at Callbox, line by line

Callbox prices on Campaign Pods. Its [pricing page](https://www.callboxinc.com/lead-generation-pricing/) runs a live estimator, and one pod returns an estimated monthly investment of $15,000 to $30,000, with the exact figure set after a consultation. A pod is scoped to one market segment or persona, and you add pods to widen coverage.

The inclusions, verbatim from that page, are a dedicated SDR, a multi-channel outreach cadence, AI-enriched contact data, campaign manager oversight and weekly performance reporting. Behind the pod sits a skill team of copywriters, data research analysts, quality assurance specialists and an account strategist, plus a tools column listing the Callbox Pipeline CRM, a multi-channel sequencing engine, LinkedIn outreach automation, real-time dashboards and Email Deliverability Infrastructure.

That last line item is the interesting one. It is named as a product and never sized. There is no send capacity on the page, no domain or inbox count, no inbox-placement figure and no bounce rate. Callbox's own blog does publish percentages, including a 15 to 25% reply rate for signal-personalized outreach against a 3 to 5% cold-email average, and a recommendation to keep bounce under 2%. None of those figures carry a send count, so none can be checked against a program you might buy.

A monthly fee is a forecast of work. A send count with a bounce rate attached is a record of work that happened.

## Compare the three providers on what each one reports

Ranked by reported campaign evidence. Every provider here is a legitimate operator with a real client base, and the honest differences are in channel mix and in what gets disclosed.

|  | StoneHaven | Callbox | Belkins |
|---|---|---|---|
| Core model | Managed email-first outbound with calling and DM layered on | Multi-channel appointment setting via dedicated Campaign Pods | Multi-channel appointment setting and lead research |
| Primary channel | Cold email at scale | Phone, email, LinkedIn, chat and events | Email and LinkedIn with SDR follow-up |
| Sending infrastructure | Isolated dedicated domains and inboxes, diversified across Google, Microsoft and private SMTP; documented builds run 25 to 120 domains and 200 to 610 inboxes | Not disclosed; listed as "Email Deliverability Infrastructure" among included tools | Not disclosed |
| Published inbox placement | 98% from the first send at 100,000+ emails a month | Not published | Not published |
| Published bounce rate | 1% to 3% across every campaign; 0.97% across one 231,347-send workspace | Not published for client programs | Not published |
| Published reply rate with a denominator | 11.94% across 183,524 sends in 10 days; 6.73% across 163,085 sends | Blog cites 15 to 25% for signal-personalized outreach, no send count given | Cites a 5.8% average across a 16.5 million email dataset |
| Send capacity per client | Up to 250,000 a month, up to 10,000 a day | Not published | Not published |
| Engagement model | Booked-pipeline program, scoped and quoted on a call | Subscription per Campaign Pod, estimator $15,000 to $30,000 a month | Retainer, quoted on a call |
| Geographic coverage | North America, UK, EU, Australia | Offices in eight countries across the Americas, EMEA and APAC, campaigns in 60+ countries | North America and EMEA |
| Best-fit buyer | Firms with a mid-five-figure-plus deal size where email carries the pipeline | Enterprise buyers who need in-region, in-language phone coverage | Buyers who want appointment setting with heavy research support |

The pattern across the row for published campaign data is the point. Two of the three providers describe capability and one reports volume. Belkins publishes a reply average across a very large dataset, which is a real disclosure and worth crediting, though it is a market-wide average rather than a program you could buy. If you are weighing these three seriously, the [full Belkins comparison](https://stonehaven.capital/alternative/belkins/) covers that model in more depth.

Across every StoneHaven campaign, bounce stays between 1% and 3% and unsubscribes between 0% and 0.24%, at up to 250,000 sends a month per client program.

## Engagement model, briefly

Callbox charges a monthly subscription per pod and states plainly that it does not charge per lead and does not run performance-based pricing. StoneHaven scopes and quotes a program on a call, the same way Callbox sets its exact figure after a consultation, so price is not the axis this comparison turns on.

## The line item nobody sizes: what email infrastructure has to be at this budget

Email deliverability is decided before a single send, by where the mail comes from. A program running six figures of monthly volume off a handful of shared inboxes will degrade no matter how good the copy is, and it will take the client's primary corporate domain with it if cold volume ever touches that domain.

The build that holds up at 100,000 sends a month starts with sending on dedicated domains separate from the company's main domain. Each domain carries a small number of inboxes, warmed before use, authenticated with [SPF](https://datatracker.ietf.org/doc/html/rfc7208) and [DMARC](https://datatracker.ietf.org/doc/html/rfc7489) records that resolve. Volume is spread across Google Workspace, Microsoft and private SMTP so no single provider ever sees the program's full spam percentage, because Google scores reputation by domain while Microsoft scores it by IP and tenant.

The list is the other half. It gets verified before every send and revalidated every 30 to 45 days, because an unverified B2B list bounces at 15 to 20% against roughly 1% for a verified one.

StoneHaven runs that standard because the numbers move when it slips. Per-inbox steady-state caps sit near 15 to 22 cold sends a day on Google and 3 to 10 on Microsoft, which forces domain and inbox counts up as volume rises.

Documented programs at 120,000 emails a month have run on 25 to 120 domains and 200 to 610 inboxes for that reason. Anyone quoting six figures of monthly send volume without a matching inbox count is quoting a number the infrastructure cannot produce.

Two public signals let a buyer check a provider's claim: [Google Postmaster Tools](https://postmaster.google.com/) for domain reputation and spam rate, and [Microsoft SNDS](https://sendersupport.olc.protection.outlook.com/snds/) for IP-level complaint data. Ask any provider to show you both for the domains they will send from. The [M3AAWG sender best practices](https://www.m3aawg.org/published-documents) set the baseline both platforms score against.

StoneHaven's published programs reached 98% inbox placement from the first send at 100,000+ emails a month, with spam under 0.3%.

## Two programs, with the denominators attached

A US defense technology supplier with about 120 employees ran 120,000 emails a month for six months, 720,000 sends in total, on 46 dedicated domains and 610 inboxes across two enterprise IP pools plus per-client SMTP IPs.

Inbox placement held at 98% and the reply rate came in at 2.5%, producing roughly 1,900 positive replies and 85+ qualified program and prime opportunities across 16 pursuits averaging $2.4M.

Their tracked pipeline reached $38M+ over that period, their average contract value moved from $1.5M to $2.4M, and their RFP cycle shortened from 27 months to 19.

A boutique capital advisory firm in North America, roughly 40 employees, ran a longer build: 40+ dedicated domains, 200+ warmed inboxes and 100,000+ sends a month sustained over 15 months at a 0.38% bounce rate.

Spam stayed under 0.05%. A TAM of 28,000+ accounts was narrowed to about 9,400 high-fit targets, which returned a 2.9% reply rate, a 1.1% positive-reply rate and 95+ qualified opportunities.

Their advisory conversations went from about four a month to six to eight a week, and their average mandate size grew from $2.3M to $5.4M.

Both pipeline figures belong to those firms rather than to StoneHaven. What the firm claims is the engine underneath: the send volume and the placement and bounce numbers behind it. A case study that reports only the client's revenue and never the campaign volume cannot be evaluated at all.

## How to evaluate any Callbox alternative in six questions

Take these to every provider on your shortlist, including StoneHaven.

- How many emails will go out per month, and from how many domains and inboxes? A six-figure monthly send target with no matching inbox count is arithmetic that does not close.

- What was your bounce rate on your last three programs? Under 3% is acceptable, near 1% is good, and anything above 5% means the list is not being verified.

- What is your inbox placement, and how do you measure it? Answers that cite open rates should be discarded. Tracking pixels hurt deliverability, and open tracking has been broken by Apple and Gmail privacy changes, so the honest placement signal is the out-of-office reply rate, healthy at roughly 1 to 2%.

- How many booked calls per month, at what send volume? Booked-call rate is the truth metric. Reply rate is a leading indicator and nothing more.

- Whose domain does the cold volume send from? If the answer is the client's primary corporate domain, walk.

- What happens when a domain burns? A warmed reserve that swaps in within a few days is the working answer. Rebuilding the whole infrastructure is not.

Providers who can answer all six from a dashboard are rare. The [reply and bounce benchmarks pinned to real send counts](https://stonehaven.capital/blog/cold-email-reply-bounce-benchmarks-with-denominators/) give you the ranges to hold their answers against.

In a 10-day run of 183,524 cold emails in July 2025, StoneHaven held an 11.94% reply rate and a 2.82% bounce rate.

## Where Callbox is the better choice

Callbox is the stronger fit when the phone carries the program. A dedicated SDR dialing your market in-region and in-language is the core of the pod model, and with offices across the USA, UK, Australia, Colombia, New Zealand, Singapore, Malaysia and Hong Kong, Callbox can staff overnight APAC and EMEA calling in a way StoneHaven does not attempt. Multilingual outreach into 60+ countries sits in the same bracket.

Callbox also runs events and web retargeting alongside outreach, so a buyer who wants webinar and conference follow-up folded into the same team has a genuine reason to prefer it.

The trade-off is throughput per unit of effort. In a one-year test running 100,000 touches through each channel, 100,000 cold calls produced 27 deals across a full year of dialing, while 100,000 cold emails produced 3 deals from a single day of sending.

Time-adjusted, email came out roughly 40 to 50 times ahead of calling and about 8 times ahead of LinkedIn DM. The [full channel head-to-head](https://stonehaven.capital/blog/email-vs-cold-calling-vs-linkedin-100k-per-channel/) has the funnel math for each. A phone-led program is the right call when your buyers do not read email, and an expensive one when they do.

## Where StoneHaven Fits

Eighteen of StoneHaven's published programs carry pipeline outcomes from $4M to $54M with deal-size multipliers between 1.6x and 4.6x, and each is reported with the send volume that produced it.

Best for: B2B SaaS, services, cybersecurity, industrial and manufacturing firms with mid-five-figure-plus deal sizes selling into founders, VPs of Sales, CROs and enterprise program owners.

Likely not a fit if your buyers do not live on email, or if your total addressable market is a few hundred accounts. Both cases need a named-account motion rather than a volume engine.

If a booked-pipeline program built on published deliverability data fits how you want to grow, [StoneHaven's team can walk through the numbers with you](https://stonehaven.capital/book/). The wider field is covered in the [appointment setting company comparison](https://stonehaven.capital/alternative/best-appointment-setting-companies/), and the build-versus-buy question is worked through in the [in-house SDR analysis](https://stonehaven.capital/alternative/outsourced-sdr-vs-in-house/).

## Frequently asked questions

How much does Callbox cost?

One Campaign Pod is estimated at $15,000 to $30,000 per month on Callbox's pricing page, with the exact figure set after a consultation. A pod covers one market segment or persona and includes a dedicated SDR, a campaign manager, AI-enriched contact data and weekly performance reporting. Coverage is widened by adding pods, so the quote scales with the number of segments worked rather than with send volume.

Is Callbox worth it for B2B lead generation?

For a phone-led program dialing APAC or EMEA in local hours, yes. Callbox has been running B2B outreach for over 20 years with offices in the USA, UK, Australia, Colombia, New Zealand, Singapore, Malaysia and Hong Kong. For an email-led program the answer is weaker, because its pricing page carries no send capacity and no deliverability figure for a client program. Ask for sends per month, inbox placement and bounce before signing. StoneHaven answers those three with 250,000 sends a month per client program, 98% inbox placement and bounce between 1% and 3% across every campaign it runs.

What are the best Callbox alternatives?

The credible field for a mid-market or enterprise buyer is Belkins, CIENCE, Martal Group, SalesHive, Leadium and StoneHaven. Sort them by which channel carries the program rather than by brand. Belkins and CIENCE run large multi-channel appointment-setting benches. Martal Group leans on fractional sales talent. StoneHaven is email-first and publishes the campaign numbers behind the work, including a single 10-day run of 183,524 sends at an 11.94% reply rate with 2.82% bounce.

How does StoneHaven compare to Callbox?

Callbox runs multi-channel Campaign Pods across phone, email, LinkedIn, chat and events, built around a dedicated SDR per pod. StoneHaven runs email-first programs on isolated infrastructure and reports the volume behind the result: 183,524 sends in a 10-day run at an 11.94% reply rate with 2.82% bounce, plus a separate workspace of 231,347 sends held at 0.97% bounce. The practical difference for a buyer is that one model is priced per dedicated rep and the other is measured per send.

Does Callbox publish deliverability data?

No. Callbox names Email Deliverability Infrastructure as an included tool and never sizes it, and its quoted blog percentages carry no send count.

StoneHaven's own claims carry denominators: 98% inbox placement at 100,000+ emails a month, bounce 1% to 3%.

Which is better for a company that needs cold calling as the main channel?

Callbox, in most cases: eight international offices give it overnight APAC and EMEA dialing StoneHaven does not staff. The trade-off is throughput.

In a one-year study of 100,000 touches per channel, cold calls produced 27 deals over a year, cold emails 3 deals in one day.

## Methodology

StoneHaven's figures come from campaign-dashboard data and the 18 anonymized program case studies published on stonehaven.capital, covering 2025 and 2026. Every first-party figure carries its denominator.

The 11.94% reply rate and 2.82% bounce are measured across 183,524 sends in one 10-day run in July 2025.

The 0.97% bounce covers 231,347 emails sent to 77,115 leads in a single workspace, and the 6.73% reply rate covers 163,085 sends in June 2025.

Booked-call figures of 532 in one month and 445 in 25 days are StoneHaven's own pipeline output rather than a client's.

Pipeline and deal-size figures in the two program examples belong to those firms and are reported as their tracked outcomes.

Callbox data was read directly from callboxinc.com/lead-generation-pricing/ and its published blog content on 30 August 2026, including the Campaign Pod estimator range, the pod and skill-team inclusions, the tools list and the pricing FAQ. Callbox reply-rate percentages are quoted as published, without send-count denominators, because none are given. Belkins reply data is quoted from its published cold-email dataset. Competitor pricing was not independently audited; check each provider's site for current rates.

The channel comparison is StoneHaven's own one-year study running 100,000 touches through email, phone and LinkedIn DM. Industry ranges for bounce, verification and per-inbox send caps are market benchmarks rather than the firm's own measurements. FAQ questions were sourced from live search demand for "callbox alternative", "callbox pricing" and "callbox reviews" on 30 August 2026. Open rates are not tracked or reported anywhere in this analysis; tracking pixels hurt deliverability and open tracking is unreliable on Apple and Gmail.

Last updated: August 2026.

Written by Sabo Nagy, Founder & CEO of StoneHaven. Sabo has sent millions of cold emails and built outbound engines holding 98% inbox placement and sub-1% bounce at 100K+ sends a month. [Author page](https://stonehaven.capital/author/sabo-nagy) - [X](https://x.com/MrColdEmail)

## See it working on your market.

Book a consultation call and we'll show you exactly how we'd build your pipeline - live in 72 hours.

Schedule a consultation call

## More comparisons

[Comparison](https://stonehaven.capital/alternative/how-to-vet-a-cold-email-agency/)

### [How to Vet a Cold Email Agency: The Four Numbers to Demand Before You Sign](https://stonehaven.capital/alternative/how-to-vet-a-cold-email-agency/)

[Most cold email agency hero stats carry no time period and no client count. Here are the four numbers to demand, and StoneHaven's answers, including 98% inbox placement at 120,000 sends a month.](https://stonehaven.capital/alternative/how-to-vet-a-cold-email-agency/)

[August 30, 2026](https://stonehaven.capital/alternative/how-to-vet-a-cold-email-agency/)[15 min read](https://stonehaven.capital/alternative/how-to-vet-a-cold-email-agency/)

[Comparison](https://stonehaven.capital/alternative/outsourced-sdr-services/)

### [Outsourced SDR Services Compared: Four Agencies, Ranked by What They Publish](https://stonehaven.capital/alternative/outsourced-sdr-services/)

[Callbox, SalesHive, Belkins and Martal publish meeting counts and ROI multiples. StoneHaven publishes 98% inbox placement and a 0.97% bounce rate across 231,347 sends.](https://stonehaven.capital/alternative/outsourced-sdr-services/)

[August 30, 2026](https://stonehaven.capital/alternative/outsourced-sdr-services/)[13 min read](https://stonehaven.capital/alternative/outsourced-sdr-services/)