Top 9 Cold Email Agencies That Actually Get Replies

Cold email still plays a meaningful role in generating high-quality leads.

In fact, Saleshandy reports that cold emails average a 5.8% response rate, not mind-blowing on their own, but still a steady source of pipeline for many B2B teams.

From our experience at SalesBread, cold email performs best when it’s paired with another channel, especially LinkedIn outreach.

When both channels are running together, reply rates go up, lead quality improves, and your campaigns become far more predictable.

So while cold email on its own isn’t the highest-converting channel, it’s still a valuable part of a multitouch lead generation strategy, as long as you choose the right agency to run it for you.

In this article, we’ll break down the top cold email agencies worth hiring in 2025, including:

• SalesBread — Best for ultra-personalized outreach and 1 lead per day

• Belkins — Best for enterprise appointment setting

• Cience — Best for scaling multi-channel outbound

• Martal Group — Best for mid-market and enterprise teams

• Cleverly – Best for those who want a pay-per-lead option

• SalesRoads – Best for consistent, phone-plus-email outbound appointment setting

• Lead Cookie – Best for low-volume outreach

• Growth Rhino – Best for startups that need quick outbound traction

• Growth.cx – Best for B2B SaaS and tech companies

(If you’re interested in working with an agency that can get you 1 lead per day, book a free 15-minute strategy session with the CEO of SalesBread, Jack Reamer.)

Cold email agency comparison table

Best Cold Email Outreach Agencies for B2B Lead Generation

SalesBread — Best for ultra-personalized outreach and 1 lead per day

LinkedIn has proven to be a very productive channel with the following stats:

Since 2019, SalesBread clients have averaged a 19.98% reply rate with our ultra-personalized LinkedIn Lead Generation Services.

And… 48.14% of those replies were either meeting requests or qualified sales inquiries on their product or service.

Along with LinkedIn outreach, we combine cold email for the best results.

The SalesBread process

60-Minute Discovery Call

Before we begin our campaigns, we start with a 60-minute discovery call to truly understand your business.

On this call, we:

• Define your offer, positioning, and sales goals

• Dig into your best existing customers to look for patterns and make look-alike lists

• Refine your ideal customer profile (ICP)

• Figure out what makes prospects say yes and what sets your business apart from others

• Find unique angles and value props we can test in your campaigns

The outcome of this call is a clear, shared picture of who we’re targeting and why they should care about your business, so when we move into list building and messaging, nothing is guessed.

Ultra-Refined List Building

Once we’ve nailed down your ideal customer profile, we move into building your list.

At SalesBread, we believe that “getting a list of prospects is easy — getting the right list takes strategy.”

We hand-build your list by layering multiple filters:

• People-based (role, department size, company size),

• Financial (revenue, funding)

• Intent data

• Hiring trends

• Social signals and even “event” triggers (e.g., new hiring, funding round, PR activity)

We use methods like web-scraping to pull targeted companies (for example, those with 50–200 employees hiring HR roles), then manually verify the contacts to ensure they fit your ICP and are likely to purchase.

Because of this level of precision, verifying that each contact is accurate and relevant. We create a list that drives high reply rates and meetings, rather than a generic “spray” list full of unqualified leads.

Personalized Outreach

With your list finalized, we launch deeply personalized outreach through LinkedIn.

Rather than sending generic templates filled with {first name}, every message includes real context and insights that show the prospect we actually did our homework.

We will look for something specific to write about when we reach out to them.

This personalized approach is why our campaigns often deliver 19–48% reply rates.

By using both LinkedIn and email, we reach prospects where they’re most active and maximize the chances of starting a real conversation.

Follow-Up Sequences (LinkedIn + Cold Email)

Most agencies send one or two messages and then give up; we do the opposite.

Our follow-up strategy includes multiple soft touches across LinkedIn and cold email, using the Fibonacci sequence so that follow-ups feel natural.

We also give LinkedIn users the option to move the conversation to email, and then we continue the conversation there.

While our main focus is LinkedIn, we also make use of cold email to keep the conversation going.

Ask for a booked sales call and set up appointments

We always ask for a quick booked sales call.

As positive replies come in, we qualify every conversation to ensure you only receive leads who are actually interested, relevant, and ready to talk.

Instead of sifting through unqualified replies, you simply show up to high-quality conversations, often averaging one solid lead per day.

Pricing

At SalesBread, we charge $3 k per month with a one-time setup fee, less than the cost of hiring a full-time SDR.

Case Studies

LocalEyes Case Study – 78 Qualified Leads in 60 Days.

294 Leads Generated, 41% Average Reply Rate

Glasswall Case Study – 41% Positive Reply Rate in 40 Days

IT Lead Generation Case Study – 294 Leads Generated, 41% Average Reply Rate

Testimonials

Read more of our client testimonials here.

Belkins — Best for enterprise companies

Belkins has become a familiar name in the cold email space.

They’re not the agency you go to for hyper-personalized outreach or deep relationship building, but if you want a cold email program that is structured, steady, that’s where they tend to shine.

Where Belkins fits best is with companies that already know their market, have a defined ICP, and simply need a predictable flow of booked meetings without expanding their internal sales team.

If your goal is to get a steady cold email campaign running in the background while your team focuses on closing deals, Belkins tends to be a practical option.

On the flip side, businesses that want deep personalization, multi-channel outreach, or a more creative approach to outbound may find Belkins a bit too system-focused.

They are also pretty pricey for smaller companies, so might be best suited for enterprise organizations.

Pricing

Clients that have switched from Belkins to SalesBread have told us that they charge between $5k-14 800k/month.

If you’re interested in reading more about their pricing, read this article: Belkins Review & Pricing -Is This Lead Gen Agency Worth It?

Reviews

Here’s a recent review according to G2.

Cience — Best for scaling multi-channel outbound

CIENCE is one of the bigger players in the outbound world.

They operate more like a full outbound infrastructure than a boutique agency, which means they’re set up to run large, multi-channel campaigns that combine cold email with calling, research, and sometimes paid outreach.

CIENCE is usually a good fit for mid-market or enterprise businesses that want a predictable outbound system running across several different channels at once.

However, companies looking for highly personalized cold email, tighter ICP refinement, or smaller, relationship-driven outreach campaigns might find their approach too broad or too volume-focused.

Pricing

Cience doesn’t list their pricing on their website. But according to research, you can expect to pay anywhere from around $4,200 to nearly $9,000 a month.

Review

Martal Group — Best for mid-market and enterprise teams

Martal Group isn’t your typical “cold email only” agency, and they’re not a pure SDR outsourcing agency either.

Instead, they position themselves as a partner that provides North American reps with actual industry experience, especially within SaaS, cybersecurity, IT, and other technical B2B markets.

Because of this, their cold email outreach tends to feel more informed and aligned with the complexities of technical buyers.

Their process is usually a mix of cold email with other outbound touchpoints, sometimes LinkedIn, sometimes light calling, which helps them reach decision-makers who may not respond on just one channel.

Overall, Martal Group is a strong match for B2B brands that need consistent, informed outreach rather than mass cold email or deeply experimental campaigns.

Pricing

Martal has a few differing pricing tiers to choose from, but you would have to reach out to them for personalized pricing recommendations.

You have to sign up for a 3-month pilot program, and then from there on you can pay month to month.

Review

Cleverly – Best for those who want a pay-per-lead option

Cleverly is known mostly for LinkedIn lead generation, but they’ve expanded into cold email over the years, offering a more affordable, plug-and-play style of outreach.

Their approach is straightforward: they build a list based on your target criteria, write a series of cold email sequences, and run the campaign with testing and optimization.

It’s not a deeply personalized or research-heavy service; Cleverly is designed for companies that want simple, low-maintenance outreach without overthinking the details.

Because their process is more template-driven, campaigns can be launched quickly, and pricing tends to sit on the lower end compared to larger, multi-channel agencies.

Their campaigns typically focus on volume and consistency rather than hyper-targeting, which can work well for broader markets or general B2B service offerings.

Where Cleverly fits best is with companies that want a hands-off, budget-friendly outbound program.

They’re not the right choice for teams that need deep personalization, strategic ICP refinement, or highly technical outreach.

Pricing

Cleverly doesn’t list their pricing for their cold email campaigns, but they do mention that you only pay per ready meeting.

You would have to reach out to them directly for more information.

Review

SalesRoads – Best for phone-plus-email outbound appointment setting

SalesRoads is one of the more established outbound providers in the U.S.

They don’t rely on mass sending or high-volume automation; instead, they run structured, repeatable outbound cold email marketing services that blend cold email with steady, well-timed follow-ups and cold calling.

What sets SalesRoads apart is their focus on the North American market.

Most of their clients sell to U.S.-based decision-makers, and their outreach style reflects an understanding of that audience, how they prefer to communicate, what messaging resonates, and how to keep outreach professional without overdoing it.

Their cold email campaigns are designed to support a larger outbound campaign, not to be creative experiments or deeply personalized messages.

This makes them reliable for businesses that value structure, reporting, and a methodical approach.

Their sweet spot is helping established businesses maintain consistent outbound momentum, especially when targeting U.S. markets.

Pricing

Salesroads pricing starts at $9500 for 4 weeks, and with each package, you will get a dedicated SDR, Sales Operations Team, Director of Client Success, and a Talent Development Manager.

Review

Lead Cookie – Best for low-volume outreach

Lead Cookie takes a softer approach to cold email outreach compared to most cold email service providers. Instead of pushing high-volume email campaigns, their cold email marketing style is built around genuine, low-volume conversations.

This helps brands protect their reputation while still generating steady lead generation results through email outreach and LinkedIn messaging.

Their cold email service works best for companies that want outreach emails to feel human.

Lead Cookies approach is great for businesses that want a more personalized approach over aggressive sales tactics. If your team wants to fill the sales pipeline without overwhelming prospects with many emails, Lead Cookie’s style of cold email marketing services should be a good fit.

Pricing

Lead Cookies pricing starts at $1500 per month for LinkedIn and cold email, and works its way up to $3700 per month.

Reviews

Unfortunately, there aren’t any recent reviews for Lead Cookie, but here’s what I could find.

Growth Rhino – Best for B2B companies that need quick outbound traction

Growth Rhino takes a very different approach from most cold email service providers.

Their whole cold email service is built around a simple idea: figure out the right messaging first, then scale.

Instead of launching huge campaigns right away, they run everything in small, controlled “micro” experiments, so you’re learning what works instead of burning through your market.

Their team sets up all the cold email infrastructure in the background, domain warmup, IP setup, authentication, and the tools needed to keep deliverability strong.

Then comes Experimentation, which is where Growth Rhino stands out.

The goal is to identify, using real data, which cold email outreach message resonates with each persona before scaling it.

Pricing

Growth Rhino doesn’t list their pricing on their website, but you can reach out to them for more information.

Review

I couldn’t find a third-party review for Growth Rhino, but this is what one client of theirs had to say:

Growth.cx – Best for B2B SaaS and tech companies

Growth CX offers a more strategic style of cold email outreach. It combines cold email, LinkedIn, email sequences, and broader outbound campaigns.

They might be a great fit for companies that need more than just an email service provider; They are almost like a full-service inbound lead generation team that focuses on cold email marketing

For companies that want help building out cold email campaigns from scratch and need a multi-channel inbound approach, then Growth CX offers one of the more hands-on agencies to work with.

Pricing

Unfortunately, no pricing is listed, and you would have to reach out to Growth CX directly.

Review

FAQs About Hiring a Cold Email Agency

Here are some common questions that people might ask about hiring a cold email agency, but if you would like to know what to ask a cold email agency before hiring them, read this: Questions to Ask Before Hiring a Cold Email Agency (+ Top Picks)

1. What does a cold email agency actually do?

A cold email agency handles everything involved in cold email outreach; From building your prospect lists, writing email sequences, setting up your email domains, and managing deliverability, to booking qualified meetings for your sales team.

Some agencies also include multi-channel outreach (like LinkedIn or calling), while others focus on cold email campaigns.

2. How do I know if I should hire a cold email service provider?

If you don’t have the time, expertise, or internal team to run cold email marketing consistently, a cold email service can help.

Agencies are especially useful if you struggle with deliverability, can’t get replies, or need meetings booked quickly without hiring SDRs.

3. What results should I expect from cold email marketing services?

Realistically, you should expect a mix of replies, conversations, and booked meetings, not hundreds of leads overnight. A good cold email agency focuses on quality and sends outreach to the right prospects, not “many emails” to random lists.

Typical expectations: 10% reply rates (depending on the offer) and consistent booked meetings.

4. How long does it take to see results from email outreach?

Most cold email campaigns take 2–4 weeks to warm up properly, especially if new domains or inboxes need to be set up.

Once the email warm-up is complete and the outreach starts, you can usually expect meetings within the first month, as long as the ICP and messaging are strong.

5. What should I look for when comparing cold email service providers?

Look at:

• Their list-building approach (is it hand-built?)

• Their cold email infrastructure setup (domains, warm-up, email validation)

• Their deliverability practices

• How they personalize email copy

• Whether they offer multi-channel outreach

• Transparent reporting

• Their pricing plans and contract terms

Cheap agencies often cut corners with spammy automation, which hurts your domain and your brand. Rather, stay away from companies that lock you into contracts.

SalesBread doesn’t lock clients into contracts, and rather, it’s our results that get our clients to stay.

6. How many emails should a cold email agency send per day?

Volume depends on your domain setup, warm-up stage, and deliverability. Most reputable agencies keep cold email volumes low at first and scale up gradually. If an agency promises to send thousands of emails immediately, it’s a red flag.

This article is an excellent resource for how many emails you can send safely.

7. Will hiring a cold email marketing agency hurt my email deliverability?

A good cold email agency will protect your deliverability by warming up domains, rotating inboxes, validating email addresses, and avoiding spam triggers.

Issues only happen when an agency uses poor outreach strategies, high-volume automation, or tools without proper email warm-up.

8. What’s the difference between email marketing and cold email outreach?

Email marketing targets people who have already opted into your list. Cold email outreach targets new prospects who haven’t interacted with your brand yet.

Because of this, cold email has to adhere to strict deliverability practices, better email copy, and cold email tools.

9. How much does it cost to hire a cold email agency?

Pricing varies widely. Basic cold email outreach services can start around $1,000–$2,000/month, while multi-channel outbound and appointment-setting programs can range from $3,000–$12,000+/month, depending on your needs.

10. Can I run cold email campaigns myself instead of hiring an agency?

Yes, but only if you have the time to manage everything yourself: list building, email copy, deliverability setup, spam filters, inbox management, A/B testing, and follow-ups.

Tools like SmartLead, SalesHandy, and Salesforge can help, but most companies prefer hiring a cold email agency because it saves time and reduces risk.

11. What questions should I ask a cold email service provider before hiring them?

Ask about:

• How they build lists

• How many inboxes they rotate

• Their cold email warm-up process

• Their benchmarks for reply rates and meetings

• How they measure campaign success

• What tools they use

• Whether they personalize copy

• If they provide conversation handovers or sales support

• How long before I see results?

• Will I own my cold email domain?

These questions help you separate real, thoughtful cold email outreach services from automation-heavy, spammy companies.

Conclusion

Most cold email outreach agencies focus on sending as many emails as possible, but that rarely leads to quality conversations.

Agencies need relevant, qualified prospects, not just volume.

SalesBread solves this by hand-building targeted lists, personalizing every message, and running multi-channel outreach that feels human.

If you’re looking for high-quality booked sales calls, instead of spammy campaigns, SalesBread’s “1 lead per day” gives you what most cold email outreach agencies can’t: Real sales opportunities that actually convert.

Book a free 15-minute strategy session below