5 Outsourced SDR Services That Build B2B Pipeline

Quick Summary

The top outsourced SDR services for B2B companies in 2026 include Sales Automation Systems (SAS), Belkins, and SalesRoads. SAS skips SDRs and emails your entire total addressable market (TAM) every 30 to 60 days, Belkins sells omnichannel outreach packages, and SalesRoads leads with cold calls. Choose based on how your buyers reply and how big your market is.

What to Know Before You Outsource Your SDRs

An in-house SDR’s median on-target earnings is $80,000 a year before you pay for tools, data, and management, according to The Bridge Group’s 2025 SDR research. A new SDR takes about three months to ramp, and median SDR attrition was 40% in 2024.

So outsourcing makes financial sense for many teams. But outsourced SDR services work very differently. Some rent you SDRs who call and email a set list, some run campaigns across every channel, and some skip SDRs and email your whole market.

The bigger question is whether a provider can reach enough of your market to grow the pipeline. You also want to know if the meetings they’re booking are with people your sales team wants to talk to.

This guide compares five outsourced SDR services below on how they work, what they charge, and who they’re best for.

Why Listen to Us?

Sales Automation Systems (SAS) runs done-for-you cold email, and 100+ companies have trusted SAS with their outbound. Many of the founders we talk to have already tried an SDR hire, an appointment-setting agency, or a cold email tool they ran themselves. So we see where each model works and where it stalls.

“I didn’t know if cold email would work for my business. That’s actually why I hired Taylor and the SAS team. I wanted someone who could give me a real answer.”

Eric Partaker, The CEO Coach and founder of CEO Accelerator

That experience shaped how we judged the providers on this list. We looked at what decides results in outbound, including how much of your market a provider can reach, which channels it uses, what it costs once every fee is added, and how long you’re locked in.

What Are Outsourced SDR Services?

With outsourced SDR services, you hire an outside provider to handle top-of-funnel sales development work. That’s the stuff an in-house sales development representative (SDR) would normally do. It includes prospecting, building lists, writing outreach, sending emails or making calls, and qualifying leads into booked meetings for your sales team.

The provider runs its own team, tools, and infrastructure. You get the output, usually qualified meetings or warm conversations, without hiring, training, or managing the reps yourself.

Why Are Outsourced SDR Services Important?

An outsourced SDR service changes four things for your sales team compared with hiring in-house.

• They take pipeline generation off your closers’ plates: An outsourced SDR team lets your closers focus on closing while someone else fills the top of the funnel.
• They cut the cost and risk of building in-house: An in-house SDR’s pay alone averages $80,000 a year, and tools, data, management, and recruiting add to that. The Bridge Group reports an average SDR tenure of 1.9 years, so you’re paying to replace and retrain constantly.

Among the providers below that publish prices, starting costs run from about $4,250 a month (CIENCE, one offshore SDR, before setup) to $11,950 per four weeks (SalesRoads), and you can scale up or down without severance.

• They get you to pipeline faster: An in-house SDR takes about three months to ramp. An outsourced team arrives trained, and some launch fast. SAS, for example, can start campaigns in as little as one week.
• They give you infrastructure you probably don’t have: Deliverability, sending domains, data enrichment, multi-channel sequencing, and compliance are entire jobs on their own. A good provider has already solved these problems across dozens of accounts.

5 Best Outsourced SDR Services

1. Sales Automation Systems

SAS is a done-for-you cold email service for B2B companies that want to reach their entire total addressable market (TAM). SAS isn’t software or a traditional SDR agency. Instead of renting you SDRs, SAS runs the whole outbound system for you, from list sourcing and sending infrastructure to copywriting and campaign management, on a flat quarterly retainer.

What makes Sales Automation Systems’ approach different is the volume. Instead of emailing a few thousand contacts and hoping for replies, SAS maps your full TAM and emails all of it every 30 to 60 days. So every company in your market that could buy hears from you.

Sales Automation Systems can launch campaigns in as little as one week, and the founders stay hands-on in every account’s strategy and execution. Directive, a B2B marketing agency, reported $999,750 in closed annual recurring revenue from SAS-run cold email in about six months. Fyxer, an AI SaaS platform, reached an estimated $4.3 million in peak annual pipeline revenue within eight months.

Key Features

• Full TAM mapping: Finds and segments your entire market using SAS’s own data sources, so no potential buyer gets missed.
• Sending infrastructure: Sets up and maintains a multi-domain sending setup, with authentication and deliverability handled for you.
• Message testing: Tests dozens of email angles quickly to find the one your market replies to.
• Full-TAM campaigns: Runs the winning message across 100% of your TAM every 30 to 60 days.
• Lead lists and copywriting: Sources your contact lists and writes your emails, both included on every tier.
• Founder involvement: Puts Sales Automation Systems’ founders directly into your campaign strategy and execution.

Pricing

Sales Automation Systems offers three tiers. Each starts with a flat quarterly retainer, billed monthly, and you expand once you’ve seen real campaign data.

• Seed: 60K emails per month, as low as $6,000 per month
• Series A: 125K emails per month, as low as $12,500 per month
• Series B: 250K emails per month, as low as $25,000 per month

Add-ons, such as founder calls, verified mobile numbers on positive replies, and waterfalled emails sent to your CRM, are available on top.

Pros

• Reaches your entire TAM every 30 to 60 days instead of a small sample.
• Pricing is published on a flat retainer with no per-meeting fees.
• Campaigns can launch in as little as one week.

Cons

• Cold email only. If your buyers respond better to phone or LinkedIn, you’ll need to pair SAS with another channel or handle those internally.
• Sales Automation Systems doesn’t close deals. It produces positive replies and booked intro calls, and your team handles follow-up and closing.

2. Belkins

Belkins is a B2B lead generation agency that has run outbound since 2017. It has worked with 1,000+ clients across 50+ industries, running outreach across email, LinkedIn, and cold calling.

Belkins sizes its packages by yearly appointment targets, from 30+ on the Small Business plan to 100+ on the Growth plan and 200+ on Growth Plus. Depending on the package, it also adds executive dinners, conference activation, webinar support, and paid ads.

Key Features

• Cold email and LinkedIn outreach: Runs prospecting across both channels from one team.
• Cold calling: Adds intent-based cold calling, plus regular cold calls and voicemails.
• Account-based marketing: Targets named accounts with coordinated campaigns.
• Event and ad support: Adds executive dinners, conference activation, webinar support, and paid ads, depending on the package.

Pricing

Belkins doesn’t publish prices. It sells monthly retainer packages (Small Business, Growth, Growth Plus, and Enterprise), quoted on request.

Rating

Clutch: 4.9/5 (234 reviews)

Pros

• Packages include yearly appointment targets, so you know roughly what volume you’re paying for.
• Its Growth and Growth Plus packages cover email, LinkedIn, and phone outreach.
• It has worked with 1,000+ clients across 50+ industries and has likely seen a business like yours.

Cons

• There’s no public pricing. You’ll need a sales call before you can compare costs.
• Events, ads, and some channels depend on the package.

3. Martal Group

Martal Group is a B2B lead generation and sales agency that pairs 200+ onshore sales reps with its own AI sales platform. About 80% of its reps are in the US and Canada, and it focuses on technology, B2B SaaS, and software development.

Martal stands out for its structured pilot model. New clients commit to a three-month or four-month pilot before moving to a monthly subscription.

Key Features

• Dedicated outbound team: Assigns a sales executive, research manager, and sales operations manager on the lead generation tier.
• AI Sales Platform: Runs omnichannel campaigns through Martal’s own agentic AI.
• Tiered services: Lets you outsource lead generation only, add sales and customer onboarding, or add account management too.
• Onshore reps: Places most of its sales executives in the US (60%) and Canada (20%).

Pricing

Martal doesn’t publish dollar prices. Its pricing page lists a flat monthly fee for every tier, plus a sales commission on Tiers 2 and 3. Tier 1 starts with a three-month pilot, and Tiers 2 and 3 with a four-month pilot.

Rating

Clutch: 4.8/5 (109 reviews)

Pros

• A set three- or four-month pilot gives you a defined trial before you move to monthly terms.
• Most reps are based in the US or Canada, which helps if you sell into North America.
• You can start with lead generation and hand over sales, onboarding, and account management later.

Cons

• There’s no public pricing, and Tiers 2 and 3 add a sales commission on top of the monthly fee.
• The required pilot of three to four months means you can’t test with a quick one-month engagement.

4. CIENCE

CIENCE is a B2B appointment-setting and lead generation agency that has worked with 2,500+ B2B clients over 10+ years. Its SDRs book meetings by phone, email, and LinkedIn, and its campaigns run on the graph8 platform. One SDR runs all three channels, so your buyer hears from one person across every touch.

CIENCE’s pricing model is modular. You pay separately for a one-time setup, the campaign team, and the platform, then add SDRs at location-based rates. You see most line items before you sign, but the total adds up once you stack them.

Key Features

• Verified contact lists: Builds and verifies your prospect list before the first call, removing wrong numbers and dead emails.
• Line-item pricing: Breaks the cost into setup, campaign team, platform, and SDRs, so you see where the spend goes.
• One SDR, three channels: Has a single SDR call, email, and message each buyer on LinkedIn.
• SDR location choice: Lets you pick offshore, Europe, or US-based SDRs, each at a different price.

Pricing

CIENCE’s pricing has four parts: a one-time setup fee (amount not published), $2,000 a month for the campaign team, $499 a month for the graph8 platform, and SDRs from $1,750 a month offshore, $2,500 in Europe, or $3,500 in the US. SDRs can also earn a performance bonus once they hit 60% of their monthly meeting target.

Rating

Clutch: 4.2/5 (142 reviews)

Pros

• Published line-item pricing lets you see most of the cost before you sign.
• Contact lists are built and checked before outreach starts, so fewer calls go to wrong numbers.
• Geographic flexibility means you can control costs by choosing where your SDRs are based.

Cons

• Costs stack up. One US-based SDR plus the campaign team and platform comes to $5,999 a month, before the setup fee and any performance bonus.
• Contracts run month to month, but the setup fee isn’t published, so ask for it before you sign.

5. SalesRoads

SalesRoads is a phone-first outsourced SDR firm with 19+ years serving B2B companies. It runs appointment-setting and lead generation programs built on outbound calling and personalized email.

It focuses on industries such as manufacturing, healthcare, government, and SaaS. In January 2025, SalesRoads acquired VSA Prospecting, adding another appointment-setting team.

Key Features

• Dedicated SDR team: Assigns you a dedicated SDR team, with a two-SDR option available.
• Phone-first outreach: Leads with cold calls, backed by personalized email prospecting.
• Full support team: Pairs your SDRs with a client strategist, an SDR performance coach, an optimization specialist, and a research and data team.
• No long-term contract: Lets you cancel anytime.

Pricing

SalesRoads charges $11,950 per four-week period for a dedicated SDR team. A two-SDR setup costs $16,750 per four weeks.

Rating

Clutch: 4.9/5 (69 reviews)

Pros

• Calling is the main channel. Your buyers get a live conversation instead of another email.
• You can cancel anytime, with no long-term commitment.
• Pricing is published per four-week period.

Cons

• At $11,950 per four weeks, it has the highest published starting price on this list.
• Programs cover calling and email but not LinkedIn.

How We Evaluated These Outsourced SDR Services

We compared each provider on five things, using its own website and its Clutch profile:

• Published pricing: Whether you can see what it costs before a sales call.
• Channels: Email, LinkedIn, phone, or a mix.
• Team location: Where the SDRs on your account are based.
• Contract terms: Pilots, retainers, or month-to-month.
• Client results and reviews: Documented case studies and Clutch ratings.

Every provider here serves B2B companies and has been operating for at least several years. We included a range of service models, from phone-first to email-only to omnichannel. The right outsourced SDR service depends on how your buyers prefer to be reached.

How to Choose an Outsourced SDR Service

• Start with how your buyers reply: If they answer email, volume and deliverability matter most. If they pick up the phone, rep experience and call quality matter more. Ask each provider how many meetings for clients like you came from calls, email, and LinkedIn.
• Size your market before you size the team: SDR capacity caps how many accounts get contacted each month. That works for a few hundred named accounts, but in a market of 1M+ contacts, most buyers never hear from you. Ask how many of your target contacts the provider will reach in the first 90 days.
• Price the whole engagement, not the headline: Setup fees, platform fees, per-SDR rates, commissions, and performance bonuses all change the total. Get the all-in cost for month one and month three in writing.
• Check the commitment: Terms range from three- or four-month pilots to quarterly retainers to month-to-month. A pilot gives a provider time to tune targeting, while month-to-month lets you leave fast if the numbers miss. Confirm the minimum term and what happens if results miss target in month two.
• Agree on what lands with your team: Some providers hand you booked meetings, others hand you positive replies and intro calls, and your team handles follow-up and closing either way. Agree up front on exactly what you’ll receive and who handles follow-up.

Which Outsourced SDR Service Is Right for You?

Every provider on this list solves a different version of the same problem.

They all deliver qualified conversations to your sales team without the overhead of building an in-house SDR function from scratch.

Belkins suits teams that want several channels and room to add events and ads as they grow, with yearly appointment targets on each package. Martal Group gives you a mostly US- and Canada-based team and lets you hand over sales, onboarding, and account management later, as long as you’re happy to commit to a three- or four-month pilot.

CIENCE prices each part separately, lets you choose where your SDRs sit, and runs month to month. SalesRoads suits buyers who pick up the phone. Calling is its main channel, there’s no long-term contract, and it costs $11,950 per four weeks.

If you don’t need more SDRs and you need your whole market contacted, Sales Automation Systems emails your entire TAM every 30 to 60 days on a flat quarterly retainer, and campaigns can launch in as little as one week. SAS produces positive replies and booked intro calls, and your team handles follow-up and closing.

Sales Automation Systems is a fit if you sell SaaS, AI, or B2B services, your market has 1M+ contacts, customer lifetime value is $15,000+, and you already have a working sales process and product-market fit. It isn’t a fit for markets under 10,000 contacts, lifetime value under $1,000, pre-launch products, or teams with no sales follow-up in place.

Want to see how much of your market you’re missing? Book Intro Call

Outsourced SDR Services FAQs

1. Which companies offer the best outsourced SDR services?

Five providers stand out for B2B teams: Sales Automation Systems (SAS), Belkins, Martal Group, CIENCE, and SalesRoads. Each solves the problem differently. SAS emails your entire TAM without SDRs, Belkins sells omnichannel packages with yearly appointment targets, Martal pairs onshore reps with a set pilot, CIENCE prices every line item and lets you choose where your SDRs sit, and SalesRoads leads with cold calls on month-to-month terms.

2. How much do outsourced SDR services cost?

It depends on the provider, the channels, and where the SDRs sit. Among the providers in this guide that publish prices, CIENCE starts at about $4,250 a month with one offshore SDR (before setup), Sales Automation Systems starts as low as $6,000 a month, and SalesRoads charges $11,950 per four weeks. Belkins and Martal Group quote on request. Compare that with an in-house SDR, whose median on-target earnings are $80,000 a year before tools, data, and management. To run your own numbers, try SAS’s cold email ROI modeler.

3. What’s the difference between outsourced SDR services and lead generation software?

Outsourced SDR services are managed by people who prospect, write outreach, send messages, and qualify leads on your behalf. Lead generation software like Apollo, Instantly, or Clay gives you the tools to do that work yourself. The trade-off is control versus time. Software gives you full control, but it requires someone on your team to run it every day. An outsourced SDR service handles the execution, so your team can focus on closing.

4. How long does it take to see results from an outsourced SDR provider?

It depends on how well-defined your ideal customer profile is and how quickly the provider ramps up. SAS can launch campaigns in as little as one week, then tests email angles before scaling the winner across your full TAM. Martal Group’s pilots run three to four months, so judge it over the whole pilot. For comparison, an in-house SDR takes about three months to ramp.

5. Should I outsource SDR or hire in-house?

Outsourcing makes the most sense when you need pipeline quickly and can’t justify an in-house SDR, whose median on-target earnings are $80,000 a year before tools and management. It’s also a good fit when you want to test a new market without committing to a full-time hire. Hiring in-house works better when you want to own sales development long term. But you’ll need the bandwidth to recruit, train, and retain reps. Some companies run both, with an internal core team and an outsourced partner for added capacity or new market expansion. If you’re weighing cold email specifically, SAS’s guide on whether it’s worth paying for cold email walks through that decision.