The best outsourced SDR agencies in 2026
An outsourced SDR handles cold prospecting (email, LinkedIn, calls), qualification and meeting booking, without you hiring or training in-house. The trick is picking the right provider. Here is our comparison of the most relevant outsourced SDR agencies.
Transparency: this comparison is published by Scalead. We lay out our criteria below so you can judge for yourself, and we present the other agencies based on their public positioning.
Get qualified meetingsThe ranking at a glance
| # | Agency | Focus | Best for |
|---|---|---|---|
| 1 | ScaleadOur recommendation | Managed B2B prospecting, results guaranteed on your criteria | B2B SMBs and scale-ups that want guaranteed qualified meetings without building a team or running a tool. |
| 2 | Belkins | Outsourced SDR & appointment setting at scale | US-focused companies wanting volume and process maturity. |
| 3 | Leadium | Boutique, 100% US-based, published pricing | Teams wanting a boutique, US-based SDR with transparent pricing. |
| 4 | SalesRoads | Outsourced SDR & appointment setting | Companies wanting a dedicated US SDR team. |
| 5 | Callbox | Multi-channel SDR-as-a-service, global | Companies needing multi-region SDR coverage at scale. |
Scalead
Managed B2B prospecting, results guaranteed on your criteria
Scalead is the only agency to guarantee results: meetings and leads qualified by YOU, to YOUR criteria. A team of experts, backed by AI, runs the entire prospecting engine (infrastructure, targeting, copywriting, email/LinkedIn/call sequences, qualification), you do nothing. You validate every lead and only pay for the meetings that are genuinely qualified.
Human-first, AI-assisted
Experts run your prospecting. AI helps personalise messages and target at scale, but humans stay at the core of qualification.
Fully outsourced, nothing to do
Infrastructure, copywriting, email, LinkedIn and call sequences, qualification: Scalead handles everything. You receive the meetings, with nothing to manage.
Guaranteed results, on your criteria
Scalead is the only agency to guarantee results: meetings and leads qualified by YOU, to YOUR criteria. You validate every lead, and only pay for those.
Other agencies worth considering
Belkins
Outsourced SDR & appointment setting at scale
Belkins is a well-known B2B provider offering outsourced SDR programs with a structured, process-mature approach to appointment setting.
Best for : US-focused companies wanting volume and process maturity.
Leadium
Boutique, 100% US-based, published pricing
Leadium is a boutique outsourced SDR company, 100% US-based, with published pricing (roughly $3,500-$5,000/month).
Best for : Teams wanting a boutique, US-based SDR with transparent pricing.
SalesRoads
Outsourced SDR & appointment setting
SalesRoads is a US outsourced SDR and appointment-setting provider with dedicated sales development teams.
Best for : Companies wanting a dedicated US SDR team.
Callbox
Multi-channel SDR-as-a-service, global
Callbox delivers outsourced SDR services across email, phone, social and chat, with global coverage.
Best for : Companies needing multi-region SDR coverage at scale.
How to choose: the 6 criteria that matter
Pricing model
Pay-on-results, monthly retainer, or setup + subscription? A results-based model aligns the agency with your meetings, not its hours.
Level of delegation
Fully done-for-you (infra, copy, targeting, replies) or just coaching/tooling? Check what still lands on your plate.
Channels covered
Cold email, LinkedIn, phone, or multi-channel. Multi-channel meaningfully lifts reply rates on the right ICP.
Meeting qualification
Who decides a meeting is 'qualified'? Ideally you, against criteria set during onboarding.
Time to launch
Time between signing and the first meetings, factor in infrastructure setup and domain warm-up.
Transparency & reporting
Access to campaigns, metrics (deliverability, replies) and generated meetings, with no black box.
Our methodology
We selected agencies genuinely active in the B2B market, then positioned them against the 6 criteria above (pricing model, delegation, channels, qualification, time to launch, transparency). The ranking is editorial: Scalead leads because it is the only one to guarantee results, meetings qualified by you, to your criteria, while fully handling execution. We describe each agency so you can choose based on YOUR needs.
Frequently asked questions
What is an outsourced SDR?
An outsourced SDR (Sales Development Representative) is a dedicated profile who runs cold prospecting, cold calls, email, LinkedIn, qualifies prospects and books meetings, without you hiring or equipping them. The agency brings the method, infrastructure and tools.
Outsourced SDR vs in-house SDR: which is better?
An in-house SDR means hiring, training, tooling and a ramp-up delay. Outsourcing brings all of it immediately with no heavy fixed cost. With a results-based model like Scalead, you get the meetings without carrying the salary risk.
How much does an outsourced SDR cost?
Often $4,000-$12,000/month per SDR on a retainer. Scalead's results-based model avoids the retainer: you only pay for the qualified meetings you validate.
How fast does an outsourced SDR deliver?
Typically 30-60 days: infrastructure setup, warm-up, list building and sequence launch, before a steady flow of qualified meetings.
