Companies often turn to outsourcing cold calling for a couple of reasons:
- They don’t have the right skills in-house to handle it. For example, they could struggle with putting together a list of qualified prospects, have a low conversion rate, or lack the tools to manage the cold calling process effectively.
- It’s much more convenient. Let’s be honest: cold calling is time-consuming. And covering it in-house is costly. By bringing in a reliable partner, you can transfer that responsibility and free up your time and internal team resources to focus on other important projects.
But with so many cold-calling companies making lofty promises like “25 qualified appointments a day” and concentrating on call volume just to increase their profits, it’s essential to clearly define your expectations and verify whether a potential partner can meet them.
To help you decide, we’ve written an in-depth overview of the 7 best cold-calling agencies (as of 2025). But before we dive into that, here are five essential questions to help you assess whether your chosen partner can meet — and potentially exceed — your appointment goals.
- Can the agency align their cold calling strategy with your company’s lead generation process? Even if you’re only hiring them for cold calls, a good partner should keep everything consistent throughout your sales process. This way, they represent your business well and treat cold calling as just one part of a larger strategy. Also, check if the service provides a customizable approach, understanding that a script that works for one business might not work for another.
- Does the agency have loads of experience in cold calling (ideally within your industry)? Thoroughly vet their reputation. Look for reviews or case studies from satisfied clients. Client testimonials from your industry prove that your partner can handle the nuances of your industry and adapt the cold calling strategy accordingly.
- Does the agency focus on advanced and realistic KPIs? A good agency should measure the effectiveness of its cold-calling efforts through metrics like the number of appointments set, sales conversion rate, cost per sale, lead response time, and rate of follow-up calls rather than just call volume. Also, be cautious of companies making unrealistic promises, such as delivering dozens of leads quickly, as they are likely not reputable.
- Does the agency offer an advanced lead management system? Leading cold-calling firms employ centralized customer relationship management (CRM) platforms that maintain comprehensive data on each lead. Furthermore, the agency should provide tools for call recording, note-taking, and secure information storage. These capabilities enable seamless collaboration between the cold-calling team and your sales department, ensuring that every lead is meticulously managed.
7 best B2B outbound calling companies
- Belkins: best for cold & intent-based calling for mid-size & enterprise-level companies
- Sales Roads: best for precise brand representation with dedicated playbooks
- SalesHive: best for AI-powered cold calling bots
- Smith.ai: best for AI-optimized outbound calls
- LevelUp Leads: best for e-commerce cold calling and affordable packages
- SalesNash: best for multilingual cold calling
- Leadium: best for a call-optimized data approach
Belkins
Belkins is a great choice for cold and intent-based cold calling, focusing solely on qualified prospects that have a 20% higher conversion rate. We manage all processes, from qualifying leads to researching ICP and gauging interest through initial emails or social media outreach. Our team is made up of experienced SDRs who make personalized calls using tailored scripts. By emphasizing legitimate interest, sourcing and verifying leads, and refining strategies through AI-driven analysis and call recordings, Belkins brings high-value appointments to your calendar.
“I would say what makes us different is really understanding our client, learning what solution they need, and being methodical with our calls. Each dial is intentional and thoughtful. QUALITY meetings can be game changers for our clients, so it’s very important that when choosing a cold calling company, they have a clear and great understanding of the solution you are solving!”
Frankie Diaz, Cold Calling Manager at Belkins
What makes Belkins a great cold-calling partner:
- Reliable multichannel strategy: Belkins emphasizes initial contact with leads and follow-up calling once prospects have shown some interest, such as replying to emails or accepting LinkedIn connection requests. This helps to build rapport and ensure that all leads are ready to buy.
- Script customization: Belkins’ B2B experts tailor scripts for every lead based on previous triggers and checked strategies.
- Data-driven insights: Belkins continually refines its approach to increasing ROI and maintaining transparency through AI-driven analytics, call recording analysis and ongoing performance reviews.
- Advanced data analytics & reporting: We use multi-line calling tools such as Orum and engagement platforms like Reply.io to build out calling sequences and have an advanced lead management system.
- Transparency and continuous feedback: During feedback loops, clients receive a transparent metrics review via Looker Studio along with expected future metrics.
Client highlights regarding Belkins’ cold calling service:
“Belkins worked with us for 11 months, focusing on lead generation through account-based marketing, cold email outreach, and cold calling. Their team identified potential clients, created personalized outreach campaigns, and booked 57 appointments with qualified prospects. The key deliverables included a detailed list of potential clients, the booked appointments, and regular progress updates.”
Anna Kudla, Product Manager at Umbrelly (SaaS platform)
“What truly set Belkins apart was their genuine commitment to our success. They don’t just treat us as another client; they’ve taken the time to understand our business and tailored their approach to fit our needs. It felt like we were working with a partner, not just a service provider.”
Shane Moody, CRO at MedTrans Go (B2B healthcare appointment optimization platform)
Sales Roads
SalesRoads offers outbound cold calling services as part of their broader sales outsourcing and lead generation solutions. They claim that their SDRs have 5–10 years of experience in cold calling, and they always focus on advanced SDR training to speak with your brand voice.
What makes SalesRoads a great choice:
- A rigorous training program: SalesRoads invests in SDR training, and most SDRs have an average of 5–10 years of experience.
- Adherence to company playbooks: SalesRoads tailors its cold calling strategy to a client-specific demand generation playbook, ensuring that every brand is represented accurately during each call.
- Expertise in multiple industries: They demonstrate expertise across multiple industries, as showcased in their website case studies.
- Systematic monitoring and improvements: They regularly review call lists, call activity, connection rates, and the weekly frequency of converting calls into appointments.
Client highlights regarding SalesRoads’s cold calling service:
“They reviewed the call list, call activity, and how often they connected and converted to an appointment on a weekly basis. The two most significant metrics were the calls-to-close ratio and the quality of the appointments."
Executive Director at InnSure (nonprofit insurance company)
“They really care about driving results. Your goals are their goals, and they will work to drive those results through a creative approach but also by finding amazing talent to prospect for your organization.”
VP of Sales at Crewhu (SaaS company)
SalesHive
SalesHive cold calling distinguishes itself through several key factors, such as exclusively US-based SDRs, a certified cold calling training program, and its own AI-powered cold calling platform, which includes features for filtering contacts, making calls, and building reports.
What makes SalesHive a great choice:
- Its own platform for managing calls: SalesHive has developed its own platform to manage cold calls, streamlining the entire process from lead generation to call tracking.
- US-based SDRs: SalesHive’s sales teams are fully remote and located across the U.S., allowing them to cover multiple time zones and provide timely interactions with prospects.
- Multi-industry expertise: SalesHive has proven success across various industries, demonstrating its ability to adapt strategies to different market needs.
- Expert coaching: SDRs are assigned a manager who monitors performance, holds regular coaching sessions, and listens to call recordings for quality assurance and continuous skill improvement.
Client highlights regarding SalesHive’s cold calling service:
SalesHive is an extremely big part of our sales funnel. They handle all of our cold calling and cold email outreach. We love working with our strategist Malia and the rest of the team. Highly recommend using SalesHive to scale your outbound prospecting.”
R. Cliff, VP of Sales at a SaaS company
They have built an incredible platform and have helped us double our sales meetings in a couple of months. Our new cold caller Robin has been incredible, and we meet with her and our strategist on a weekly basis.”
Brian, CEO of a marketing agency
Smith.ai
Smith.ai is an AI-optimized cold-calling solution that leverages virtual AI assistants and human expertise. It’s ideal for businesses managing a high volume of calls daily. Their approach includes AI-driven workflows and multichannel engagement, and they provide services for both warm engagement and cold prospecting.
What makes Smith.ai a great choice:
- AI-powered assistance: Their AI streamlines the dialing and initial contact process, increasing efficiency and call success rates.
- Expertise in the law industry: There are many Clutch reviews from law firms, signifying Smith.ai’s extensive experience in providing cold calling services for legal professionals.
- Detailed call intelligence: Smith.ai generates comprehensive notes, capturing key details to help with accurate follow-up. Cold call recordings and transcriptions are included.
- 24/7 availability: Captures leads and qualifies them even outside regular business hours.
Client highlights regarding Smith.ai’s cold calling service:
“Their ability to take detailed notes of the calls. Literally the best call notes I have ever seen. I don’t know how they train their employees, but they are phenomenal at providing all the details of the calls.”
Executive at The Benkabbou Law Firm, PLLC
“We receive an email with detailed notes of each and every call along with the pertinent information our firm needs to move forward with the lead or clients.”
COO at View Ridge Law and Estate Planning
LevelUp Leads
LevelUp Leads’ cold-calling service can involve both fractional and full-service SDRs, which allows businesses to enjoy flexible packages tailored to the client’s business, goals, and budget. They emphasize generating qualified leads by using customized scripts and experienced callers while also tracking advanced metrics, complying with regulations, and integrating with many CRMs.
What makes LevelUp Leads a great choice:
- Experienced cold callers: They use experienced cold callers who make an average of 130+ calls per day using a parallel dialer.
- Campaign management: LevelUp Leads manages the entire cold calling campaign daily. They also provide a Customer Success Manager to help with this process.
- Sample list: They provide a sample list to the client for review and approval to ensure accuracy.
- Focus on advanced metrics: They track key metrics like call volume, connection rates, lead conversion rates, appointment setting rates, and ROI.
Client highlights regarding LevelUp Leads’s cold calling service:
“LevelUp always delivered on time and worked with us weekly to refine the approach based on what was working and what needed improvement. They were very hands-on and communicating both through weekly reports as well as ad hoc through phone calls, email and Slack.”
Johnny Connell, former Head of Sales at Klearly (software company)
“They were fantastic in managing and time-line delivery. Always on the ball and would continuously check in to make sure we were getting the results we wanted.”
Director at Cloudian
SalesNash
SalesNash provides multilingual cold calling services that combine strategic planning with effective execution to connect with a target market. They emphasize that their approach is suitable for various types of businesses, from startups to large companies, and stands out with their expertise in SaaS.
What makes SalesNash a great choice:
- Customizable strategies: They offer flexible strategies that can be adjusted to meet the specific needs of various businesses. They mix both high-standard and experimental approaches.
- Multilingual coverage: SalesNash provides cold calling services in multiple languages, enabling them to effectively communicate with prospects in different regions.
- Transparency: They provide access to call recordings and performance statistics.
Client highlights regarding SalesNash’s cold calling service:
“They are online almost 24/7 in case of any questions. Our weekly virtual meetings help us stay on the same page and track the progress. We are also receiving detailed reports about the work done.” Ksenia Zhdanova, Office Manager at Buildmart (window installation company)
Ksenia Zhdanova, Office Manager at Buildmart (window installation company)
“Integrating their services into our business operations is easy. We have weekly calls where they report on the progress of our campaigns. Their services aren’t cheap, so we make sure we gain enough value.” Head of Sales at SaaS solutions company
Head of Sales at SaaS solutions company
Leadium
Leadium is ideal for companies looking for a cold calling service that prioritizes call-optimized phone data to maximize connection rates and enhance multichannel campaigns. Their offering works best for small and medium companies seeking a cold calling service integrating lead research to score contact information and tailor outreach strategies.
What makes Leadium a great choice:
- Experienced cold calling pros: They employ sales development representatives who are specifically hired and trained to be experienced cold callers.
- High connection rates: They utilize call-optimized phone data to achieve a significant average connection rate of 15%.
- Comprehensive lead research: They focus on providing clients with full visibility into their target market by aiming to find every contact at the companies they are selling to.
- Tailored scripts: They tailor scripts for each Ideal Customer Profile (ICP) for both cold calls and voicemails.
Client highlights regarding Leadium’s cold calling service:
“Leadium took over our sales funnel. They hit hard on phone calls, converting cold introductions into qualified sales calls. We built our lead generation strategy together, delivering a pipeline with potential closing chances.”
Bertie Hubbard, Co-founder and CEO at MyTutor (e-learning company)
“One thing we liked most about Leadium is that they stay small even though they have a large footprint. It means I am able to work directly with their founders even though they have an entire project team working on our program.”
Marcos Moura, Co-Owner & Chief Dev Officer at Amada Senior Care (a senior care company)
Imagine having a steady stream of high-converting leads coming your way, so you can focus on what you do best: closing those appointments. Sign up for a call with Belkins today, and we’ll work with you to craft a personalized plan that uses the best strategies just for your business.
