Best Sales Outsourcing Companies 2025 (Ranked on Vetting, ROI & Fit for U.S. Teams)

TL;DR: How to Choose the Right Partner

• Start with goals: Do you need SDRs, field sales, or just lead-gen support?
• Demand transparency: Ask for vetting process, sample calls, or exercises.
• Evaluate ROI, not just cost: A $5K/mo rep that books quality meetings beats a $3K/mo rep who burns leads.
• Check management model: Who owns performance? You or the vendor?
• Prioritize cultural fit & communication: Accent, U.S. hours, and collaboration matter.

Methodology

We evaluated providers on the criteria most buyers actually care about:

• Talent vetting & quality - Does the provider screen candidates with real exercises?
• Management & QA - Who ensures reps are performing daily?
• Cultural alignment - Accent neutrality, U.S. business fluency, and time zone coverage.
• Scope & fit - Do they provide SDRs, field sales, or full-cycle teams?
• Cost efficiency - Savings vs. in-house, balanced with outcomes.
• Flexibility – Terms, scaling, and ability to pilot.

This is not pay-to-play. Each vendor is presented with strengths, limitations, and best-fit use cases.

1. Remote Growth Partners (RGP)

Overview: U.S.-based firm specializing in offshore SDRs and marketing talent. Acts as an extension of your team, with RGP managing payroll, HR, and performance.

Key Differentiator: A 4-step vetting process including:

1. Video screening for fluency & communication.
2. Paid skill tests (mock cold calls, emails, real tasks).
3. In-depth interview for experience & motivation.
4. Mock discovery call with feedback for coachability.

Why it matters: Every candidate is tested in real conditions. Only the top fraction make it through. Clients often report that every presented candidate is hireable.

Strengths:

• Emphasis on accent neutrality and U.S. cultural fit.
• Dedicated account managers oversee performance.
• Breadth of roles: SDRs, marketers, designers, video editors, and more.
• Clients report rapid ramp and pipeline lift while cutting SDR costs ~50%.

Limitations: Focused on remote/inside sales — not the partner if you need door-to-door or field sales teams.

Best for: Startups and agencies that want dedicated, embedded SDRs vetted like in-house hires, but at offshore costs.

2. Sales Partnerships, Inc. (SPI)

Overview: Established in 1997, SPI pioneered “Sales as a Service” and specializes in field and direct sales teams.

Strengths:

• Decades of experience with Fortune 500 field programs.
• Sophisticated training, QA, and analytics.
• Ideal when you need boots-on-the-ground sales reps.

Limitations:

• Premium-priced; mostly U.S. reps (little labor savings).
• Better for enterprise-scale programs than small teams.

Best for: Enterprises that want a fully managed direct sales force — not just SDRs.

3. Landed

Overview: AI-driven hiring platform for high-volume roles (sales associates, SDRs, customer service).

Strengths:

• Automates sourcing and vetting.
• Customizable screening criteria.
• Trusted by 500+ retail and hospitality brands.

Limitations:

• Platform, not a managed service. You still hire and manage internally.
• Optimized for hourly and entry-level roles.

Best for: Retail/hospitality businesses needing to hire many frontline reps quickly.

4. MarketStar

Overview: Large-scale outsourcing partner with decades of experience running sales teams for global tech companies.

Strengths:

• Can deploy full-cycle teams (SDRs through account management).
• Data-driven, analytics-heavy approach.
• Global reach for multilingual sales.

Limitations:

• Expensive; often requires multi-rep teams.
• Less flexibility for startups or small-scale needs.

Best for: Mid-to-large companies needing turnkey teams at scale.

5. Martal Group

Overview: B2B lead generation and SDR outsourcing firm.

Strengths:

• Omnichannel outreach (calls, email, LinkedIn).
• Experienced SDRs with strategic input.
• Flexible engagement models.

Limitations:

• Premium-priced ($3K–$40K/mo).
• Focuses on lead generation, not full-cycle closing.

Best for: Tech startups that want outsourced SDR pipeline generation.

6. GrowthAssistant

Overview: Provides offshore “growth assistants” for marketing and sales support roles.

Strengths:

• Extremely selective (1 in 400 pass rate).
• Strong cost savings (~60% vs. U.S. hire).
• Dedicated full-time staff aligned to U.S. hours.

Limitations:

• You still manage daily work.
• More marketing-focused; not a turnkey outbound sales engine.

Best for: Companies needing affordable offshore specialists to extend marketing/sales ops.

7. HireWithNear

Overview: Nearshore recruiting and staffing agency for Latin American talent.

Strengths:

• Cost savings (30–70% lower than U.S.).
• Strong English fluency and cultural alignment.
• Time zone overlap with U.S.

Limitations:

• Primarily recruiting/staffing, not managed service.
• Limited to Latin America.

Best for: Companies wanting nearshore SDRs/AEs they can manage directly.

8. SalesHive

Overview: U.S.-based outsourced SDR agency with AI-powered platform.

Strengths:

• Transparent flat-rate pricing (~$5K/mo per SDR).
• Tech-enabled personalization and analytics.
• Month-to-month terms.

Limitations:

• Higher base cost vs. offshore.
• Focuses only on top-of-funnel (meeting setting).

Best for: B2B companies that want fast, tech-driven outbound execution.

9. Upwork (Marketplace)

Overview: Freelance marketplace for any sales-related task.

Strengths:

• Global pool, flexible pricing.
• Quick to hire.

Limitations:

• You manage everything: vetting, training, QA.
• Variable quality.

Best for: Short-term or one-off sales projects.

10. Fiverr (Marketplace)

Overview: Gig marketplace for micro-tasks.

Strengths:

• Fast, cheap, and simple.
• Great for one-off needs (lead lists, scripts).

Limitations:

• Not built for long-term SDR outsourcing.
• Quality can be hit-or-miss.

Best for: Micro-tasks inside a larger sales program.

Here is the Full Summary

How to Choose (Buyer’s Checklist)

1. Define scope: SDRs, field sales, or just list-building?
2. Ask for proof: Vetting exercises, call recordings, case studies.
3. Check management model: Who owns daily QA?
4. Test cultural alignment: Accent, U.S. hours, communication.
5. Run a pilot: 2–3 months with clear success criteria.

Conclusion

Sales outsourcing in 2025 isn’t just about cheap labor, it’s about scaling smart with vetted talent. Whether you need enterprise field reps (SPI, MarketStar), pipeline generators (Martal, SalesHive), nearshore teammates (HireWithNear), or embedded offshore operators (RGP), the right partner depends on your goals.

Where RGP fits: For U.S. startups and agencies that want dedicated, vetted SDRs who integrate like in-house hires, RGP’s process-driven model is the clear #1 choice.