Alternatives Guide

The Best Callbox Alternatives for B2B Appointment Setting

Callbox runs large multichannel programs priced by the campaign pod. These agencies are worth comparing if you want a smaller scope, published prices or shorter terms.

The short answer

  • Belkins for email-led appointment setting with deliverability handled. Starter price from $5,000.
  • CIENCE to build an outsourced SDR team month to month: $5,000 setup, then $2,000 a month for the strategy team and $499 for its graph8 platform, with SDRs priced on top.
  • SalesRoads for dedicated US SDRs on the phone: $11,950 per four weeks for one SDR, cancel anytime.
  • Martal Group if you sell tech and want a pilot before a longer commitment.
  • SalesHive for US-based SDRs on one flat monthly fee with no long-term contract.
  • memoryBlue if you sell into tech or the public sector and want an established SDR team.
  • FlowStrata if you want signal-based outbound and part of the fee tied to qualified meetings.

Prices are the agencies' own published figures, checked 17 September 2026.

Callbox alternatives at a glance

AgencyBest forPricing
BelkinsTeams selling $5K-$50K deals that want an email-led motion with deliverability handledStarter price from $5,000 on its retainer packages
CIENCEMid-market and enterprise teams that want a full outsourced SDR function across channels$5,000 setup, then $2,000/mo team + $499/mo graph8; SDRs extra ($1,500 to $6,500); month-to-month
SalesRoadsTeams that want dedicated US SDRs on the phone without a long contract1 SDR $11,950 per 4 weeks; 2 SDRs $16,750 per 4 weeks; cancel anytime
Martal GroupTech and SaaS companies that want a pilot before a longer commitment3- or 4-month pilot, then a flat monthly fee (plus commission on higher tiers); amounts not published
SalesHiveTeams that want US-based SDRs, one monthly fee and no long contractOne flat monthly fee, quoted per client; no long-term contract
memoryBlueTech and public-sector sellers that want an established outsourced SDR teamNot published
FlowStrataHigh-ticket B2B companies that want part of the fee tied to qualified meetingsMonthly fee plus a fee per qualified meeting, quoted per engagement

Why Look for Callbox Alternatives?

Callbox at a glance. Callbox was founded in 2004 and is headquartered in Encino, California, with 700+ staff. It sells lead generation, appointment setting, account-based marketing, event marketing and outsourced SDR work across phone, email, LinkedIn, chat and events. Pricing is by the campaign pod: Callbox estimates $15,000 to $30,000 per pod per month and sets the exact price after a consultation. It says it does not work strictly on a pay-per-lead or commission basis.

Teams compare alternatives for three reasons.

Budget. A pod estimate of $15,000 to $30,000 a month is a large first commitment for a company that is still testing outbound.

Focus. A broad multichannel program suits companies that want every channel at once. Teams that want one channel done deeply or a tightly defined buyer list often look for a smaller specialist.

Payment model. Some buyers want part of the fee tied to results. Callbox runs on a subscription, so those buyers look at agencies that charge per meeting.

Top Callbox Alternatives in 2026

1. Belkins

US-based B2B appointment-setting agency working cold email, cold calling and LinkedIn, known for its deliverability setup.

Starter price from $5,000 on its retainer packagesBest for: Teams selling $5K-$50K deals that want an email-led motion with deliverability handled

Pros

  • Deliverability infrastructure is part of the service
  • Belkins lists 1,500 leads a month and 100 guaranteed appointments a year on the starter package
  • Cold email, calling and LinkedIn available

Cons

  • Contract length is not published, so ask before you sign
  • The starter price is the only published figure
  • Email-led, so calling-heavy programs may fit better elsewhere

2. CIENCE

Outsourced SDR agency with its own graph8 data platform for intent signals, running email, phone and LinkedIn.

$5,000 setup, then $2,000/mo team + $499/mo graph8; SDRs extra ($1,500 to $6,500); month-to-monthBest for: Mid-market and enterprise teams that want a full outsourced SDR function across channels

Pros

  • Itemized, published pricing
  • Month-to-month terms
  • Own data platform (graph8) for intent signals

Cons

  • The first month is $7,499 before SDR costs
  • SDR seats are priced separately
  • A large organization, so ask who will work your account

3. SalesRoads

US agency with dedicated SDRs for appointment setting by phone and email, based in Boca Raton, Florida.

1 SDR $11,950 per 4 weeks; 2 SDRs $16,750 per 4 weeks; cancel anytimeBest for: Teams that want dedicated US SDRs on the phone without a long contract

Pros

  • Published prices
  • Cancel anytime
  • Dedicated SDRs rather than a shared pool

Cons

  • Billed per four-week engagement, which means 13 invoices a year
  • Works phone and email
  • Higher entry price than email-led agencies

4. Martal Group

Fully managed outbound and fractional sales teams for tech companies, working email, LinkedIn and calls.

3- or 4-month pilot, then a flat monthly fee (plus commission on higher tiers); amounts not publishedBest for: Tech and SaaS companies that want a pilot before a longer commitment

Pros

  • Starts with a pilot campaign
  • Works email, LinkedIn and calls
  • Lists SaaS, cybersecurity, fintech, healthcare and manufacturing among its industries

Cons

  • No published amounts
  • Higher tiers add a sales commission
  • Pilots run three to four months

5. SalesHive

US SDR agency that sells phone-only or phone-and-email programs for one flat monthly fee.

One flat monthly fee, quoted per client; no long-term contractBest for: Teams that want US-based SDRs, one monthly fee and no long contract

Pros

  • No long-term contract, cancel with written notice
  • US-based SDRs, with an offshore option
  • One flat monthly fee

Cons

  • No published amounts
  • Phone only or phone plus email
  • The quote depends on team location, channels and daily touches

6. memoryBlue

Outsourced SDR teams for technology and public-sector sellers, working email, LinkedIn and phone. Based in Tysons, Virginia. It has merged with Operatix.

Not publishedBest for: Tech and public-sector sellers that want an established outsourced SDR team

Pros

  • More than 20 years in outsourced SDR work
  • Email, LinkedIn and phone
  • Public-sector experience

Cons

  • No published pricing
  • Built around tech and public-sector sellers
  • Merged with Operatix, so ask who will staff your account

7. FlowStrata

Founder-run outbound agency for high-ticket B2B companies. It runs cold outbound on buying signals and revives the inbound leads that went cold, delivered as qualified meetings.

Monthly fee plus a fee per qualified meeting, quoted per engagementBest for: High-ticket B2B companies that want part of the fee tied to qualified meetings

Pros

  • The per-meeting fee applies only when a meeting matches the definition written into the contract
  • Inbound lead revival runs alongside cold outbound
  • The founder builds and runs every campaign

Cons

  • A small team, so capacity is limited
  • No published price list
  • Two published case studies, so far fewer than Callbox

The Real Alternative: Let Someone Else Handle It

Most agencies still run on volume and on data you have to supply. FlowStrata is built differently: a done-for-you outbound engine where we own the entire stack, verified data, human copy, warmed deliverability and reply handling. We run cold outbound to the accounts that fit, trigger outreach the moment a prospect shows intent and revive the inbound leads you already paid for that went cold. You get qualified meetings booked, not seats, software or a list to manage. If you want a partner that owns the whole engine, that is us.

Frequently Asked Questions

Agencies that sell outsourced SDR and appointment-setting work, such as Belkins, CIENCE, SalesRoads, Martal Group, SalesHive and memoryBlue. They differ most on channel focus, published pricing and contract terms.
Callbox prices by the campaign pod. It estimates $15,000 to $30,000 per pod per month and sets the exact price after a consultation (callboxinc.com, checked 17 September 2026).
SalesRoads ($11,950 per four weeks for one SDR), CIENCE ($5,000 setup, then $2,000 a month for the team and $499 for graph8, with SDRs extra) and Belkins (starter price from $5,000). Martal Group, SalesHive and memoryBlue quote per client.
SalesRoads lets you cancel anytime, SalesHive has no long-term contracts and CIENCE runs month to month. Martal Group starts with a three- or four-month pilot.
Callbox is a credible multichannel option for broad, full-funnel programs. Whether it fits depends on whether you want breadth across channels or a smaller, more specialized outbound program.
FlowStrata is smaller and more focused. We own the data, copy and deliverability, trigger outreach on buying signals and charge a monthly fee plus a fee per qualified meeting. Callbox runs broad multichannel programs on a subscription.

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