The best cold calling agencies in 2026 for B2B sales teams
Nine agencies that make outbound calls and book meetings for B2B companies, what each one says it does, who it fits, and how to choose.
By the VoiceDrop teamUpdated November 5, 20269 min read
A cold calling agency makes outbound calls for your sales team and books the meetings.
A cold calling agency hires, trains and manages callers who phone your target buyers for you. The callers, often called sales development reps or SDRs, follow a script built around your offer, qualify the people who pick up and put meetings on your sales team's calendar. Many agencies also run cold email and LinkedIn outreach, so one team works each prospect on several channels.
Hire one when your closers spend their days prospecting, when you need pipeline faster than you can recruit and train reps, or when you want to test a market before you build a team. If you already have a proven script and a manager with time to coach, your own reps and a dialer may cost less. Below are nine agencies, what each one says on its own website, and what to check before you sign. Every fact comes from the agency's own site as of November 2026, and the order is our editorial pick, not a score.
Here are the nine agencies in our order, with what each one does.
1. Cleverly
Done-for-you outbound across cold calling, cold email and LinkedIn, with a trained appointment setter, call scripts and a power dialer included.
2. CIENCE
Managed SDR teams that call, email and message buyers on LinkedIn, on month-to-month terms.
3. Callbox
Phone, email and LinkedIn campaigns, with native-speaking SDR teams for new markets.
4. Martal Group
An outsourced sales team of reps based in North America, the EU and Latin America.
5. SalesHive
Cold calling by a US-based team, plus cold email, list building and appointment setting.
6. SalesRoads
A dedicated outsourced SDR team that books appointments by phone and email.
7. Abstrakt
US-based reps on one St. Louis campus, booking appointments for commercial trades and B2B companies.
8. Leadium
US-based SDRs running cold calls, email and LinkedIn outreach, with weekly reporting.
9. Intelemark
US-based callers who book meetings on your reps' calendars, paid for their time.
Here is how the nine agencies compare on services and location.
| Agency | Best for | Based in | Cold calling | Appointment setting | Cold email | |
|---|---|---|---|---|---|---|
| 1. Cleverly | Calls, email and LinkedIn from one agency | Los Angeles, CA | ||||
| 2. CIENCE | Month-to-month SDR programs | Not listed | ||||
| 3. Callbox | Selling in several countries | Encino, CA | ||||
| 4. Martal Group | Reps based in three regions | Oakville, ON, plus US offices | ||||
| 5. SalesHive | US-based callers, flat-rate programs | Remote-first, US | - | |||
| 6. SalesRoads | A dedicated SDR team | Boca Raton, FL | - | |||
| 7. Abstrakt | Commercial trades and local B2B sales | St. Louis, MO | ||||
| 8. Leadium | Weekly reporting across channels | Las Vegas, NV | ||||
| 9. Intelemark | Callers paid by time, test campaign first | Scottsdale, AZ | - |
Compiled on November 5, 2026 from each agency's own website. A dash means the agency does not list that service on its site. Services and locations change, so confirm on the agency's site.
Cleverly is the pick for B2B teams that want calls, email and LinkedIn from one agency.
Cleverly is a B2B lead generation agency that runs cold calling, cold email and LinkedIn outreach for its clients. It started in Los Angeles and now runs a fully remote team. Its services list covers cold calling, appointment setting, outsourced SDRs, cold email and LinkedIn lead generation, so you can start with calls and add channels later without changing agency.
Its cold calling service places a trained appointment setter on your account. The agency says it writes the call scripts, supplies the data and a power dialer, and books appointments straight onto your calendar, with your calendar and CRM connected. It describes the price as one flat monthly cost, and says callers are trained and live within weeks.
Cleverly says you get call recordings and reporting on call volume, outcomes and lead quality, so you can hear the calls yourself. Its site also says placed SDRs come with free replacement, and that its callers are trained for North American business. Best for B2B teams that want one agency across calls, email and LinkedIn.
CIENCE suits teams that want a month-to-month SDR program across phone, email and LinkedIn.
CIENCE is a B2B appointment setting and lead generation agency founded in 2016. Its SDRs call, email and message buyers on LinkedIn, and when a buyer is a fit the meeting goes on your sales team's calendar. The agency now sits inside graph8, a go-to-market software company, and its calling runs on graph8's dialer.
Its cold calling page says callers work from verified numbers and every call is recorded. It quotes calling by scope rather than per seat. The site describes a fixed monthly fee plus a commission for each held meeting, on month-to-month terms with no long contract. Best for teams that want to add or remove SDRs as the program proves itself.
Callbox suits companies that sell in several countries and want SDRs who speak the local language.
Callbox is a B2B lead generation and appointment setting agency founded in 2004, with campaigns in North America, Europe, Asia-Pacific and Latin America. Its site says software helps find and prioritize accounts while its own people make the calls, qualify interest and book the meetings.
Callbox coordinates phone, email and LinkedIn in one campaign and runs multilingual SDR teams for companies entering new markets. It says it sends weekly reports on calls, email replies and LinkedIn responses, and logs every touch to your CRM. Cost depends on your market, channels and language needs, so you ask for a quote. Best for teams selling across borders.
Martal Group suits companies that want sales reps based in North America, Europe or Latin America.
Martal Group is a B2B lead generation and sales outsourcing agency. Its site lists cold calling, appointment setting, cold email, LinkedIn lead generation and inbound lead qualification. It lists offices in Oakville, Ontario, San Francisco, Uniondale, New York and Clermont-Ferrand, France.
Martal says its reps are experienced B2B sellers based in North America, the EU and Latin America, and that it uses buying-intent data to pick which companies to contact. It runs a proprietary AI outreach system alongside its human reps. Pricing is quoted on request. Best for teams that want a mix of onshore reps across several regions.
SalesHive suits teams that want a US-based calling team with flat-rate programs.
SalesHive is a B2B sales agency founded in 2016 that runs cold calling, cold email, list building and appointment setting. Its core calling team is US-based and remote-first, and it offers an offshore calling team as a separate option.
The site says each client gets a dedicated strategist who owns targeting and messaging, and that the strategist reviews recorded calls with you to refine the script. SalesHive says it uses flat-rate pricing, custom quotes with no setup fees and no long contract. Best for teams that want US-based callers and a simple fee.
SalesRoads suits sales leaders who want a dedicated SDR team that calls and emails for them.
SalesRoads is an outsourced sales development company in Boca Raton, Florida. Each program has dedicated SDRs, a client strategist, a performance coach and a research team, and the SDRs call and email decision-makers for you. It does not list LinkedIn outreach as a service.
The site describes two program types. In appointment setting, the SDR confirms budget, authority, need and timeline before booking the meeting. In lead generation, the SDR leads with discovery questions and secures a follow-up call with your team. Every call and result shows in a live dashboard, and the site says you can cancel anytime. Best for teams that want a managed team they can see into.
Abstrakt suits commercial trades and B2B companies that want US-based reps on one St. Louis campus.
Abstrakt, formerly Abstrakt Marketing Group, is an outsourced sales development company in St. Louis, Missouri. It books sales appointments for commercial trades and other B2B companies, using U.S.-based reps who work from its St. Louis campus.
Its reps call every working day on recorded lines, backed by short emails, direct mail and LinkedIn. Every dial, conversation and recorded call appears in a results portal. The site also says it checks whether your territory is open, because it takes one client per trade per territory. Best for local service and trade companies selling to businesses.
Leadium suits teams that want US-based SDRs, weekly reporting and several outreach channels.
Leadium is a B2B sales prospecting agency based in Las Vegas, Nevada. Its services include appointment setting, data sourcing and inbound lead qualification, with cold calling, cold email, LinkedIn outreach, gifting and event follow-up as channels.
Leadium says its US-based SDRs write custom call scripts for each group of prospects and run call campaigns every week. It reports weekly on connect rates, call outcomes and conversion, and uses A/B tests to refine scripts. Its site also says it uses an AI dialer with call analytics and scorecards. Best for teams that want steady reporting across channels.
Intelemark suits teams that want experienced US-based callers and a test campaign before committing.
Intelemark is a B2B appointment setting and lead generation company in Scottsdale, Arizona. Its U.S.-based callers reach your target accounts under your brand, qualify each contact against your criteria and book the meeting on your rep's calendar.
The site says you pay for the callers' time, not per meeting, that you can start with a test campaign before committing, and that you get visibility into the work every day. It also offers LinkedIn lead generation, lead qualification, database cleanup and event registration calls, but does not list cold email. Best for teams that want a phone-first agency.
Five checks show whether a cold calling agency is safe to hire.
Ask every agency on your shortlist these five questions, and get the answers in writing.
- 1Check 1
Who owns the call script?
Ask who writes the script and whether you keep it if you leave. You should approve every script before the first call, and the agency should update it as it learns what works.
- 2Check 2
Can you listen to the calls?
Ask for access to call recordings from your own campaign, not only a sample. Recordings are how you check tone, accuracy and whether callers stick to your script.
- 3Check 3
How does the agency handle calling hours and Do Not Call rules?
Federal rules allow telemarketing calls only between 8 a.m. and 9 p.m. in the called person's local time, and many states are stricter. Ask how the agency scrubs lists against Do Not Call registries, sets hours by time zone and records opt-outs. You can check the window for any state with our TCPA calling hours calculator, and our guide are ringless voicemails legal covers the consent rules behind it.
- 4Check 4
Does the agency charge by the hour, the seat or the appointment?
Common models are a monthly fee for each dedicated caller, a fee for each qualified appointment, or a flat fee plus a commission on held meetings. Hourly and per-seat pricing pays for effort, and per-appointment pricing pays for outcomes, so ask how the agency defines a qualified appointment before you compare quotes.
- 5Check 5
What does reporting show?
Ask what you will see each week: calls made, conversations, appointments booked and held, and why prospects said no. You want a report or dashboard you can read without calling your account manager, plus notes on every booked meeting.
You can run voicemail follow-up in house while an agency makes the live calls.
Not every prospect picks up a cold call, so a second touch helps. VoiceDrop delivers a recorded message straight to someone's voicemail without ringing the phone, so your own team can follow up with the people the agency could not reach.
Keep the roles clear. The agency owns live calls and booked meetings, and your team owns the recorded follow-up to contacts you have permission to reach. Ringless voicemail to a mobile phone can fall under the same rules as a call, so read are ringless voicemails legal before you send, and tell the agency which contacts you are following up so the two efforts do not collide.
A normal call rings the phone first, and ringless voicemail skips that step
A normal call
- You dialYour call goes to their phone.
- Their phone ringsThey are interrupted, or they miss it.
- Missed call, then voicemailThey see a missed call next to your message.
Ringless voicemail
- VoiceDrop sendsYour recording goes out to every number on the list.
- No ringThe handset is never dialed, so nothing rings.
- New voicemailA normal new-voicemail alert, with no missed call.
That one skipped step is why the recipient never hears a ring and never sees a missed call.
Here are answers to 5 questions about hiring a cold calling agency.
Follow up on the prospects your agency cannot reach.
Record one voicemail, add your numbers and send it straight to their voicemail without ringing the phone.