Comparison
How Callbox compares to A-Sales
Looking for an alternative to Callbox? See how a small senior calling team compares to the largest outsourced SDR operation.

The short answer
A-Sales or Callbox?
A-Sales and Callbox sit at opposite ends of the same market. Scale: Callbox is one of the largest outsourced sales development providers, running campaigns through global pods on its proprietary platform; A-Sales is a 65-person senior calling team. Pricing: Callbox quotes each managed engagement custom; A-Sales offers pay-per-appointment, so you pay for meetings held rather than campaign activity. Which is right depends on whether you want an outbound department or a senior team on the phone.
Facts checked August 2026. Every figure is sourced in the tables below.
The competitor
About Callbox
Callbox is a global B2B lead generation company headquartered in Encino, California. Founded in 2004, it is one of the largest and longest-running outsourced sales development providers, with offices across North America and Asia-Pacific. Its services span multi-channel outbound (phone, email, and LinkedIn) plus account-based marketing, event and webinar marketing, and appointment setting, run on its proprietary Callbox Pipeline platform. Callbox sells managed campaigns on custom-quoted engagements; it does not offer a pay-per-appointment model like A-Sales.

Side by side
Callbox vs A-Sales
The rows a buyer actually asks about: who runs the campaign, what data is included, what the tooling is, and what reviewers say.
Size and age tell you what kind of engagement to expect: a large, established provider brings process and headcount, a small senior team brings the people who actually make the calls. Neither is automatically better, but you should know which one you are buying.
| General Information | Callbox | A-Sales |
|---|---|---|
| HQ | Encino, CA | Sweden |
| Founded | 2004 | 2023 |
| Employees | 700+ (self-reported) | 65 |
| Outbound Services | Yes | Yes |
| Data Offering Included? | Yes | Yes |
| Account Manager | Yes | Yes |
| Project Management | Yes | Yes |
| Data Security Policy in Place? | Not published | Yes |
Ratings compress hundreds of engagements into one number, so read them together with the best and worst a provider has received. Every figure in this table can be checked on the review platform it names.
| Reviews | Callbox | A-Sales |
|---|---|---|
| Clutch Review | 4.6/5 Stars (119 reviews) | 4.9/5 Stars on Clutch (83 reviews) |
Campaigns are only as good as the list they run on. This dimension covers who builds the data, how it is enriched, and whether intent signals are part of targeting: the difference between calling a list and calling the right people.
| Sales Research | Callbox | A-Sales |
|---|---|---|
| Human Curated Data | Yes | Yes |
| Data Research & Enrichment | Yes | Yes |
| Intent Data | Not published | Yes |
| Custom Data | Not published | Yes |
The tooling decides what you can see mid-campaign: live reporting, deliverability management, and whether the software is included or an extra line item.
| Stack / Tools | Callbox | A-Sales |
|---|---|---|
| Reporting Dashboard | Yes | Yes |
| Software Included with Service? | Yes (proprietary Callbox Pipeline) | Yes |
| Sequencer Used? | Proprietary | SmartLead |
| CRM Integrations Available | Yes | Yes |
| Email Channel | Yes | Yes |
How the engagement is priced and staffed. This is where the models genuinely diverge: activity-based retainers and outcome-based pricing produce different incentives from day one.
| Campaign Strategy | Callbox | A-Sales |
|---|---|---|
| Campaign Strategy | Yes | Yes |
| Pricing Model | Custom-quoted managed campaigns | Pay-per-appointment available |
| Team Model | Large global campaign pods | Small senior calling team |
Pricing & reviews
The two questions buyers actually search
What Callbox costs and what its clients say, answered in words with the figures kept in the tables above.
Callbox pricing vs A-Sales
Callbox does not publish fixed pricing: managed campaigns are custom-quoted per engagement, as its own table row above states. A-Sales publishes its model instead: a pilot to prove your target profile, then pay-per-appointment, priced per meeting held.
Callbox reviews vs A-Sales
The Clutch figure in the table is carried from Callbox’s public profile and can be verified there directly. With a provider at this scale, read reviews from companies your size: the experience of an enterprise account and a 20-person team rarely match.
How it works
Switching from Callbox to A-Sales
A switch is a normal engagement whose week one starts from your current agency's handover: same four auditable steps.
First qualified meetings typically land inside the first month.
- Week 1
Define the target
Week 1We shape your ideal customer profile and build a verified prospect list around it.
↳ ICP brief + verified prospect list
- From week 1
Open conversations
From week 1Cold calling leads the outreach, with LinkedIn and email in support.
↳ Live call log, every conversation scored
- Weeks 2–4
Book qualified meetings
Weeks 2–4Prospects who fit land directly on your team's calendar, briefed and confirmed.
↳ Confirmed meetings with briefing notes
- Every week
Report and sharpen
Every weekWeekly numbers on conversations, meetings, and pipeline tighten the targeting each cycle.
↳ Weekly pipeline report + refined targeting
Case studies
Results our clients
put their name on
FAQ
Questions buyers ask at this point
If you want a calling-first agency where senior callers open the conversations and you can pay per appointment held, A-Sales is built for exactly that. Callbox runs a different model; the tables above show where the two differ, row by row.
Cold calling is our core channel, campaigns are staffed by a small senior team, and pay-per-appointment pricing is available once your target profile is proven.
Callbox does not publish fixed pricing: managed campaigns are custom-quoted per engagement, as its own table row above states. A-Sales publishes its model instead: a pilot to prove your target profile, then pay-per-appointment, priced per meeting held.
The Clutch figure in the table is carried from Callbox’s public profile and can be verified there directly. With a provider at this scale, read reviews from companies your size: the experience of an enterprise account and a 20-person team rarely match.
Yes. Tell us who you sell to and what your current engagement delivers; we'll tell you honestly what we can book and what it costs.
Keep comparing
Also on your shortlist?
Every comparison is built on the same dimensions, so the pages read side by side too.
- 01A-Sales vs CienceLooking for an alternative to Cience? See how a performance-led, calling-first agency compares on data, tooling, and reviews.
- 02A-Sales vs BelkinsLooking for an alternative to Belkins? See how a performance-led, calling-first agency compares on data, tooling, and reviews.
- 03A-Sales vs LeadiumLooking for an alternative to Leadium? See how a performance-led, calling-first agency compares on data, tooling, and reviews.
- 04A-Sales vs BantioLooking for an alternative to Bant.io? See how a performance-led, calling-first agency compares on data, tooling, and reviews.
Ready to see the difference yourself?
Tell us who you sell to. We'll tell you how many meetings we can book, and what it costs.
- Pay-per-appointment available
- First meetings in 2–4 weeks
- We say no if the fit is wrong











