In today’s B2B sales environment, securing quality meetings with the right decision-makers is harder than ever. Sales teams are under pressure to book pipeline at scale, but building a reliable appointment setting function in-house requires time, expertise, and heavy investment. That’s where appointment setting companies come in — giving you a ready-made team and proven systems to book meetings, nurture leads, and fuel revenue growth.
In this guide, we’ve reviewed the 10 best appointment setting companies in 2025, breaking down their services, strengths, and where they fit. While several providers stand out, one consistently rises to the top: Outbound Sales Pro, our #1 ranked choice for companies that want smarter, multi-channel execution backed by proprietary AI software.
Our evaluation considered more than 20 factors, grouped into four main categories:
While many providers look similar on the surface, our deep dive reveals major differences in execution, transparency, and results. We ranked Outbound Sales Pro as #1 because of its proprietary AI platform, parallel dialing systems, and unmatched focus on pipeline quality.
Outbound Sales Pro is not just another appointment setting company. Built by operators who have scaled outbound campaigns across dozens of industries, OSP blends human expertise with AI-powered systems to deliver unmatched results.
OSP differentiates itself with a proprietary software layer that multiplies SDR efficiency by 2–10x compared to the industry average. Instead of relying on sheer volume, campaigns are structured as multi-channel funnels — email warms prospects, LinkedIn builds credibility, and cold calls convert to meetings.
Best For: B2B SaaS, agencies, and enterprises that want to scale pipeline fast without sacrificing quality. OSP is the clear leader in multi-channel appointment setting.
Note: OSP is one of the only providers offering both done-for-you campaigns and AI-driven infrastructure, making it a unique hybrid solution in the market.
CIENCE is a large sales development agency best known for its data-heavy approach. They operate at scale, combining human SDRs with automation for list building, email sequencing, and outbound prospecting. Their emphasis on data operations makes them attractive to companies needing broad market coverage.
Best For: Enterprises seeking volume-based prospecting and broad reach rather than highly tailored conversations.
Note: While CIENCE offers impressive scale, companies should clarify connect-to-meeting efficiency and guard against over-automation.
Belkins has built its reputation as one of the most recognized appointment setting agencies.
They deliver outbound email programs, LinkedIn outreach, and lead research for companies across SaaS and B2B services.
Belkins also offers its proprietary tool Folderly, which focuses on email deliverability.
Learn more at belkins.io.
Best For: Companies prioritizing cold email campaigns and deliverability improvements.
Note: Belkins is strong on email, but their phone and multi-channel orchestration capabilities are less emphasized compared to leaders like OSP.
SalesRoads is a U.S.-based appointment setting company with a strong track record in cold calling and inside sales programs. Unlike some competitors who lean on automation, SalesRoads emphasizes human SDRs trained to handle complex conversations. Learn more at salesroads.com.
Best For: Companies targeting North American markets who want experienced SDRs leading cold call campaigns.
Note: SalesRoads’ emphasis on phone is valuable, though it may not match the AI-driven multi-channel orchestration of more modern competitors.
Martal Group is a Canada-based appointment setting agency serving tech companies, SaaS vendors, and enterprises worldwide. Their model includes outsourced SDRs and account executives embedded into client campaigns. Learn more at martal.ca.
Best For: Tech and SaaS companies wanting dedicated reps integrated into their outbound function.
Note: Martal is effective for SaaS firms, but costs can scale quickly compared to performance-based options.
SalesHive delivers outsourced SDR and appointment setting with a strong focus on multi-channel prospecting and measurable outcomes. Their model blends email, cold calling, and LinkedIn with clear playbooks and weekly reporting. Explore services and case studies at saleshive.com.
Best For: B2B companies that want a process-driven SDR partner with predictable management rhythm and multi-threaded outreach.
Note: Confirm connect-to-meeting efficiency and how SalesHive tunes messaging for new ICPs before scaling volume.
Callbox provides appointment setting and lead generation with an offshore SDR model and multi-channel programs that include phone, email, and retargeting. Their value proposition emphasizes cost efficiency and scalable teams. Learn more at callboxinc.com.
Best For: Teams seeking budget-friendly appointment setting with large top-of-funnel activity and broad targeting.
Note: Validate rep seniority per market and how Callbox ensures messaging quality for complex technical products.
Leadium is a boutique outbound partner that combines research-driven targeting with SDR appointment setting. Their programs lean into custom ICP work, cleaner data, and personalized messaging for mid-market and SaaS teams. See details at leadium.com.
Best For: Companies that value deeper research and personalization over brute-force volume.
Note: Confirm dialing approach, daily talk-time targets, and how Leadium scales once a message-market fit is proven.
RevBoss offers lead generation and appointment setting with a focus on SaaS and agencies. Their process integrates lead research, email outreach, and SDR qualification, with an eye toward steady-monthly meeting flow. Learn more at revboss.com.
Best For: Teams wanting predictable email-led appointment setting with consistent monthly cadence.
Note: Press on calling strategy, connect-rate benchmarks, and how RevBoss blends channels when email alone plateaus.
Blue Zebra is a long-standing U.S.-based calling specialist focused on B2B appointment setting. Their reputation centers on experienced callers who manage nuanced, consultative conversations—especially useful in services and niche B2B. Visit bluezebraappointmentsetting.com.
Best For: Firms that prioritize phone-led appointment setting and need veteran agents to handle objections.
Note: Clarify how Blue Zebra supplements voice with email/LinkedIn and how they report on funnel health beyond booked meetings.
Start with your ICP and buying committee: titles, industries, and regions you must reach.
From there, map the channels that fit your motion (voice, email, LinkedIn) and the capacity targets you need weekly.
Ask each vendor for connect-rate and conversion benchmarks for your market, and request recent call recordings or email reply samples to validate quality.
Outbound Sales Pro stands out by pairing proprietary AI software with parallel dialing and a strategic multi-channel funnel. Campaigns are orchestrated to warm and nurture leads via email and LinkedIn, then convert via live conversations—all while Parakeet.io safeguards deliverability with automated DNS, premium inboxes, and dynamic throttles.
The result is 2–10× SDR efficiency and pipeline that converts.
If you found this comparison helpful, you may also want to explore:
Want a plan tailored to your ICP and targets?
Talk to OSP and we’ll map your market, project benchmarks, and show you the exact funnel we’d run to fill your calendar with qualified meetings.
Our cold email outreach is designed to beat spam filters, generate high quality leads and appointments that close.
Our infrastructure allows us to scale volume quickly. Growing your sales team? We can provide your team with more appointments!
