Looking for the best sales outreach agencies to drive the pipeline more efficiently in 2025? With B2B companies investing 2–5% of revenue into marketing, outsourcing outreach can be far more cost-effective than hiring SDRs at $90K–$130K per rep. These agencies handle everything from prospecting to booking meetings, ensuring fast response times and consistent messaging that moves leads closer to revenue.
Below, we’ve identified the top agencies to partner with and how tools like ZenABM can amplify their impact by deanonymizing account engagement on your ads, surfacing intent signals, and enabling personalized outreach to high-intent buyers.
|
Agency |
What they offer |
| SalesCaptain | AI-powered multi-channel outreach (email, LinkedIn, text), Clay integration for data enrichment, intent data targeting, ICP validation, CRM integration, deliverability protection |
| CIENCE | SDR teams, multi-channel sequences, lead research |
| Belkins | Appointment setting, LinkedIn + email outreach, lead research |
| Martal Group | North America-based SDRs, multi-channel outreach, C-level focus |
| SalesRoads | U.S. SDR outsourcing, phone-first outreach, and appointment setting |
| MemoryBlue | Complex B2B SaaS, enterprise tech, ABM-aligned outreach |
| Growth Genie | Playbook design + SDR coaching, outbound messaging frameworks |
| EBQ | Full SDR services |
| Leadium | Data research + SDR outreach (email + phone) |
A sales outreach agency contacts prospects that match your ideal customer profile and starts conversations that lead to revenue. They go beyond cold emailing or calling by first identifying the right accounts and decision-makers based on budget, pain points, and buying intent and then crafting personalized messaging that resonates with each prospect.
They also determine the best channels and timing for outreach based on how your buyers behave, whether that’s email, phone, or LinkedIn. When responses come in, the agency qualifies interest, handles objections, and only books meetings with prospects who have real buying authority. This saves your team from wasted demos.
When choosing an agency, look for one that understands your industry, integrates cleanly with your CRM and sales process, reaches prospects where they actually spend their time, and tracks revenue-driving metrics like qualified meetings and pipeline impact.
Here are the top options worth evaluating.
SalesCaptain takes a data-intensive approach to outbound sales development. The agency combines intent data, funding data, revenue data, and over 250 additional data points to build prospect lists of companies actively researching solutions like yours.
Since they emphasize precision targeting before any outreach begins, their team validates your ICP, builds your messaging, and automates responses using ChatGPT and Generative AI. This means you get SDR execution and also strategic guidance on who to contact and what to say.
Their multi-channel approach covers email, LinkedIn, and text campaigns, all managed through your existing CRM infrastructure. They integrate with HubSpot, Salesforce, and all major CRMs to provide a unified conversion experience.
SalesCaptain is also one of the top Clay Enterprise Partners, using Claygent to visit domains and find custom data points like SOC-II compliance or competitor identification.
One of their key differentiators is deliverability protection. They use an outbound scaling process that achieves zero spam rates and protects your domain health and brand reputation. This is critical when you’re scaling to high volumes: many agencies sacrifice deliverability for speed, but SalesCaptain built their infrastructure to avoid that trade-off.
Pricing generally runs around $3,500 per month.
Consider SalesCaptain if you want a data-driven sals and lead generation agency that leverages AI with human expertise for SDR execution. They’ve worked with over 60 clients and have been responsible for over $320K in new revenue for individual clients.
CIENCE built its entire model around one idea: give you trained SDRs backed by solid data and campaign infrastructure. They call it “Outbound SDR,” but it’s really a team-as-a-service approach where you get the people and the systems working together.
They’re not just cold callers with a list. Their data teams actually build your ideal customer profile from scratch, then enrich and validate every contact.
Then, they design multi-channel sequences that target prospects across email, phone, and LinkedIn, utilizing their tested playbooks. They send relatable follow up messages that, besides converting qualified leads, als helps with building relationships for long-term collaborations.
The agency also uses the graph8 platform to optimize when each sequence step fires, so you’re not just blasting messages randomly. They monitor reply rates, filter through responses, and only route qualified meetings to your calendar.
You’ll pay a $1,000 onboarding fee per SDR plus a commission structure that varies by plan.
Consider CIENCE if you need serious outbound volume and want the research heavy-lifting handled for you. They’ve got the infrastructure to reduce what you’d have to build internally and the tools for closing deals faster.
Belkins, as a B2B lead generation agency, takes a different approach. Instead of just running campaigns, they become part of your sales operation.
They’ll integrate with your CRM, adjust your workflows, and build a fully-automated solution that scales without breaking your internal processes.
They start with precision targeting. They’ll analyze your market, define your ICP (or fix the one you have), validate leads, and build value propositions for each persona. Then they handle the actual outreach across multiple channels (email, LinkedIn, and phone), complete with A/B testing and deliverability monitoring.
In addition, they’ll handle the scheduling, send reminders, and re-engage no-shows until the meeting’s booked and done. This way, your team spends less time chasing prospects and can save time in actual qualified conversations.
Consider Belkins if you want a qualified team to run your entire outbound motion end-to-end while staying connected to your internal sales ops.
Martal Group combines human SDRs with their own AI-driven stack.
They begin with onboarding, where they build your business profile, define ICPs, audit messaging, and align on goals. From there, they map a multichannel strategy combining email, LinkedIn, and phone to find leads, create automated sequences, and engage them.
What’s interesting is how they protect your brand while scaling outreach aggressively.
They use infrastructure safeguards like subdomain deployments, dedicated SMTPs, and mailbox rotation to keep your primary domain safe from deliverability issues.
Their AI layer handles domain warm-up and dynamic message tailoring to avoid spam triggers.
The AI handles repetitive tasks and continuously learns and optimizes send times, message sequences, and campaign paths based on engagement data.
When responses come in, they filter everything and deliver only qualified appointments to your calendar.
Consider Martal if you want to scale outbound aggressively without risking your email reputation. Their cold outreach tools and AI/ human approach works well for B2B teams ready to start finding prospects and close more deals.
SalesRoads keeps it straightforward. They give you experienced US-based sales reps who run custom outreach sequences combining email, calling, and LinkedIn research.
Before any outreach begins, their operations team researches and verifies leads, checks contact info, and makes sure your email infrastructure won’t break. They monitor response metrics and hand off qualified appointments directly to your CRM.
Their full SDR appointment-setting package starts around $9,500 per four-week period.
Pick SalesRoads if you need to move fast, want US-based SDRs, and have the budget for volume. They provide the best value when you already have a clear ICP and need rigorous execution more than strategy development.
memoryBlue built their service specifically for B2B software and tech companies, and their outreach is multi-channel, combining email, calls, and persona-based messaging.
With over 800 clients worldwide, they understand the complexities of selling to technical buyers and will also monitor performance to help you reach your business goals.
They start with deep account and persona research, mapping out decision-makers and understanding pain points before designing outreach.
Then, their proprietary data warehouse supports enrichment and targeting, while real-time reporting shows every contact and meeting in progress.
They offer AI-driven enrichment that matches leads to ICPs, plus trigger event detection that helps SDRs reach out when timing matters.
They also use conversation intelligence tools and automated note capture to improve performance in real-time, and live lead scoring after meetings to measure engagement quality and marketing campaigns’ effectiveness.
MemoryBlue works best if you need SDR scale across regions and languages, plus a well-orchestrated outbound engine that includes AI agents and GTM strategy alignment.
Growth Genie operates differently from the others.
Instead of outsourcing your SDR function, they help you build internal capability. They coach teams in designing multi-touch sales cadences across email, calling, LinkedIn, video, voicemail, SMS, and WhatsApp.
Their methodology focuses on trigger-based messaging, role-based talk tracks, and value-centric outreach. They’ll audit your ICPs, existing sales motions, and messaging, then architect or refine your sales playbook, cadences, objection scripts, and qualification criteria.
They highlight their “30-touch sales cadence” as a model: 10–15 calls, 6–8 personalized emails, and multiple LinkedIn and voice touches over the cycle. They also use parallel dialing tools to scale call volume and manage caller ID rotation.
Consider Growth Genie for in-house hiring when you need expert guidance for ongoing training and frameworks. Their key features are less about doing the work for you and more about making your team dramatically better at outbound.
EBQ positions itself as more than just an SDR provider. They offer a complete suite covering CRM, data, marketing, appointment setting, and sales automation. Their “Outsourced Sales Development” is part of that integrated approach.
They handle targeted outreach (both outbound cold calling and inbound lead follow-up), making their SDR model customizable to your mix of prospecting versus marketing leads. They also take care of market research and validation, helping refine messaging based on what they learn about your ICP.
Their process follows defined stages: familiarize, aggregate, engage, and schedule. This covers everything from learning your business to booking meetings and confirming handoffs.
Their pricing model is project-based and tied to the number of full-time or fractional resources you add. It can look like this:
Consider EBQ when you want outreach, plus data, plus CRM, plus marketing as an integrated stack. Their strength is bundling SDR activity with operational and systems alignment rather than being a pure SDR shop.
Leadium provides fully managed outbound sales development across email, mobile numbers, LinkedIn, and even gifting touchpoints. They position themselves as a strategic partner that will convert leads and book qualified meetings.
They have the right tools to handle inbound lead qualification, taking marketing leads, enriching data, pre-qualifying intent, and converting them into sales-qualified meetings under tight SLAs.
Their “Channel-Optimized Lead Research” uses human researchers who source and validate contacts, decide which channel each lead is most likely to respond on, and clean lists before campaigns go live.
Pick Leadium if you want a full-service SDR partner that handles research, multi-channel outreach, and data hygiene in one package, especially when you want your SDR motion deeply tied to data strategy and pipeline outcomes.
These sales agencies can help you achieve tremendous business growth: they have qualified SDRs, the right automation tools, and have work on many sales tasks and lead management projects before. As such, they offer a solution for new and high-growth companies that want not only sustainable growth, but also relaible, automated outreach and appointment bookings.
That said, there’s the chance that these agencies are operating blind to when prospects are actually ready to engage.
Think about your own buying process. You research solutions for days before talking to sales. You read content, compare options, and discuss internally. By the time you’re ready for demos, you’ve already formed opinions about which vendors to consider.
Your prospects do the same thing. They’re researching on LinkedIn, reading your content, and checking out your competitors.
But most agencies don’t have deep LinkedIn insights into this research phase.
That’s why you can count on ZenABM’s cutting edge technology. We’re the best ABM platform, and we help you track which accounts are actively consuming your LinkedIn ad content.
Not just clicks or visits: sustained engagement patterns that indicate genuine research behavior. When companies (especially hard-to-reach audiences) repeatedly view your LinkedIn ads about specific problems, we capture that intent.
This is how we create a completely different dynamic for your outreach agency.
Instead of contacting accounts based on demographic criteria, the agency can contact accounts that are showing active interest in your solution category.
And instead of interrupting prospects with cold messages, they’ll jsend personalized messages and join conversations (think ad clicks, engagement, lead capture) prospects or new customers are already having with your brand.
Your agency’s same emails and calls will suddenly become much more relevant because they’re reaching people who are already aware of your company and actively researching the problems you solve.
The result? Qualified conversations that happen faster, with prospects who are further along in their buying journey.
ZenABM doesn’t replace your outreach agency. It is the perfect solution that gives them the intelligence they need to be more effective with every prospect they contact.
Ready to supercharge your campaign conversion rates with account-level intelligence? Book a demo to see how ZenABM’s LinkedIn advertising insights can help your agency perform faster, personalized and qualified outreach.
