The top 5 outsourced SDR agencies

Selling cybersecurity is its own thing. You’ve probably noticed it doesn’t follow the usual sales playbook.

CISOs, IT Directors, and SecOps leads are some of the most over-prospected buyers in B2B. They receive hundreds of cold emails and call every month from vendors whose reps clearly Googled "what is a firewall" the night before.

More than 70% of security buyers say they ignore outreach from reps who don't understand their world, according to Pavilion research. That filter kicks in within the first 30 seconds of a call. Sales leaders consistently said agencies booked CISO meetings when reps opened with a specific operational problem instead of a product pitch.

That's what makes picking the wrong agency in cybersecurity so costly. Every poorly handled cold call is a first impression you don't get back. In a sector where reputation travels fast, that damage adds up. In this list, you’ll find agencies with proven experience, the kind VPs of Sales and CROs actually need. We focused on documented experience: real client names, verifiable track records, reps trained for security buyer conversations.

"I've sat on both sides of those calls. When an SDR clearly has no idea what they're talking about, I hang up in 20 seconds. When they open something specific and credible, I'll give them time. The difference isn't polish; it's knowledge."

The top 5 outsourced SDR agencies for cybersecurity companies

2. Growth Orbit

HQ: USA | growthorbit.com

Overview

Growth Orbit is a US‑based outsourced SDR agency with strong B2B tech experience, especially in cybersecurity. Their domestic delivery benefits security firms targeting US enterprises and mid‑market accounts. With a strategy‑first approach, they define ICPs and craft persona‑specific messaging before outreach, avoiding generic pitches that buyers dismiss.

Key strengths

Seasoned sales executives lead strategy and operations without the cost of a full‑time hire.

Strategy-first: ICP and messaging defined before outreach begins

As a Gold Partner, the company optimises HubSpot to keep CRM, lead management, and automation seamless.

A focused 30‑day sprint, audits, messaging, and research before campaigns launch.

Ideal customer profile

US cybersecurity vendors targeting North American enterprise or mid-market accounts who want a strategy-led domestic delivery model.

Pricing

Not listed publicly. Contact directly for a scoped proposal.

3. EngageTech

HQ: UK | engagetech.io

Overview

EngageTech offers a proprietary sales intelligence platform giving SDRs contact‑level data, engagement scores, and best‑time‑to‑call signals for IT and security buyers. In cybersecurity, where CISOs and IT Directors are heavily prospected, starting with superior data is a key advantage. Clients include Rubrik and Cloudar, the latter reporting 5× more meetings per week. Engagement models include fully outsourced, managed, or platform‑only.

Key strengths

Proprietary IT buyer data platform gives SDRs better starting data than third-party lists

Rubrik as a named enterprise cybersecurity client

Pricing published on website, most transparent agency on this list

Three engagement models including a route to building internal capability

Ideal customer profile

Cybersecurity vendors selling into CISO, IT Director, and SecOps personas who want precision prospecting backed by proprietary data rather than volume outreach.

Pricing

Intelligence Platform Starts at £8,000 per year

Outsourced SDR Services: Custom quotes

4. memoryBlue

HQ: Tysons, VA, USA | Founded: 2002 | memoryblue.com

Overview

memoryBlue has specialised in cybersecurity sales development since 2002, with clients such as McAfee, Splunk, ThreatConnect and NetWitness across endpoint, SIEM, threat intelligence, cloud and network security. The memoryBlue Academy delivers structured training for SDRs, producing over 1,200 alumni now in senior roles at major tech firms. G2 ranks them number one for both Lead Generation Services and Outsourced Sales Providers.

Key strengths

Over 20 years of cybersecurity SDR experience, the deepest on this list

Flexible scope from SDRs to full-cycle AEs.

650+ reps across 9 offices, 30+ languages.

Deep expertise in cybersecurity, SaaS, fintech, public sector, AI/data.

Integrated sales, marketing, training, recruiting, and tech.

Ideal customer profile

Mid-market to enterprise cybersecurity vendors, particularly US-based, seeking a large-scale experienced partner with documented sector history across multiple sub-verticals.

Pricing

Monthly fees start at $8,000+

5. AltiSales

HQ: USA | altisales.com

Overview

AltiSales is a US-based outsourced SDR agency focused on B2B technology and cybersecurity vendors. Their domestic delivery and technology sector positioning make them relevant for US-based security companies, particularly those at the growth stage where the scale and price points of the larger agencies on this list are not yet the right fit. Their public profile is lighter than the top four here, which refers checks with cybersecurity-specific clients especially important before committing.

Key strengths

US-native delivery for North American cybersecurity markets

Technology and cybersecurity sector positioning

More accessible scale and pricing for growth-stage vendors

Ideal customer profile

US-based growth-stage cybersecurity vendors looking for a domestic outsourced SDR partner with a technology sector focus, before they are ready for the scale or cost of the larger providers.

Pricing

Not listed publicly. Contact directly for a scoped proposal.

How to choose the right partner

Cybersecurity is not the sector to guess on this. Five things to check:

1. Can they name cybersecurity clients in your sub-vertical?

Endpoint, cloud security, identity, and threat intelligence are very different buyer conversations. Ask for names and contacts, not just sector claims. Ask how long those relationships lasted.

2. How do they train reps on technical content?

Ask specifically what the onboarding covers for your product category, how long it takes, and how reps handle technical objections. Vague answers are a clear warning sign. In cybersecurity, the first 30 seconds of a call decide everything.

3. Are the reps dedicated to your account?

Cybersecurity sales cycles are long. SDRs split across multiple clients do not build the depth of knowledge needed to hold credible conversations with CISOs and IT Directors. Insist on dedicated reps and get it confirmed in the contract.

4. Where does the prospect data come from?

Ask how the contact data is sourced, how recently it was validated, and how the agency handles GDPR and CCPA compliance. Poor data quality damages both your deliverability and your brand with exactly the buyers you are trying to reach.

5. Can you speak to a former client?

Current clients are usually happy. Former clients, especially those who left early, will give you the most accurate picture of what working with the agency actually looks like past the honeymoon period.

Final thoughts

Cybersecurity is a sector where the agency's choice genuinely determines whether the programme works. The Point Co has the most specific and verifiable cybersecurity credentials on this list. MemoryBlue has the deepest historical client portfolio. EngageTech is the strongest pick where data quality is the core problem. Growth Orbit and AltiSales suit US domestic programmes at a smaller scale.

Pick two or three to shortlist, make the reference calls, and ask specifically about clients in your sub-vertical, not just the security sector broadly.