6 Best Cold Email Outreach Agencies in 2025

Cold email isn’t dead. It’s just become harder to do well. 

One of the most scalable outbound channels, it provides a cost-effective, fast-to-deploy and capable way of reaching buyers without expanding headcount.

So, what has made cold email tougher? One of the reasons is that buyers have simply been overwhelmed. AI-generated messages have flooded the market with low-quality outreach efforts. As a result, many teams have concluded that the channel simply no longer works.

The reality is different, though. Cold email still works when it’s executed with precision.

And in this guide, we’re going to present you with a list of agencies that do just that. Our chosen providers focus on deliverability, relevance, and human follow-up. They treat email as a conversation starter, not a volume play.

Alongside our overview of the best cold email outreach agencies, we’ll explain what separates effective providers from spam-heavy agencies, and help you decide which partner fits your outbound strategy.

So let’s get started. 

‍TL;DR: the best cold email outreach agencies are:

‍Profitbl: for B2B tech companies looking to penetrate Benelux, UK & US markets

1. Belkins: for companies looking for a global partner who can tackle multiple industries
2. CIENCE: for enterprises that want to expand on existing sales systems
3. Sopro: for compliance-focused European businesses
4. Salescode: for compliance-focused enterprise and IT companies
5. Pipeful: for companies that want to optimize existing infrastructure 

So, how can cold email outreach remain effective?

The best outreach firms will ensure they set out the right conditions for your campaign to hit inboxes, and most importantly, generate replies from interested parties.

Here’s what that looks like in practice:

• Clean, warmed inbox infrastructure: This is a starting point to ensure that emails are hitting inboxes. If they’re not, then obviously your outreach campaign is going nowhere.
  
  
• Highly targeted prospect lists: After learning about your offer(s), target market, and ICP, the best cold email agencies will know exactly who to target.
  
  
• Contextual, role-specific messaging: Next, they’ll know what itches your ICP is trying to scratch, and thus what the contents of their messaging should be.
  
  
• Thoughtful follow-up and reply handling: Not everyone will have the time to reply the first time around. Gentle nudges are required to make sure no potential leads fall through the gaps.

These are just some traits that separate the best from the rest. Average agencies, on the other hand, will treat email as a numbers game. They’ll also employ generic copywriting (often generated by AI) and will rarely produce a real pipeline.

Finally, your run-of-the-mill agency will stick to email as its sole channel. The best cold email outreach agencies may use cold email to open the door, but will further the conversation through LinkedIn or direct phone calls. 

What to look for in a cold email outreach agency

Before choosing a provider, it’s important to understand what actually drives results. The best cold email outreach companies share several characteristics.

💡 At Profitbl, we combine cold email with LinkedIn and real phone conversations to deliver BANT-qualified pipeline.

The 10 Best Cold Email Outreach Companies (2025 Edition)

1. Profitbl

Best for: B2B SaaS and tech companies that want cold email embedded within a senior, multichannel outbound system focused on a qualified pipeline rather than reply volume.

Profitbl approaches cold email as one component of a structured outbound system rather than a standalone service. Campaigns are built on clear ICP definitions and GTM strategy, with cold email supporting SDR-led calls and LinkedIn outreach. Deliverability is handled carefully through proper inbox setup and controlled sending volumes, while replies are managed by senior SDRs who qualify interest using BANT criteria. With bilingual execution (English and French) and deep experience in SaaS, Fintech, HR Tech, and Cybersecurity, Profitbl is best suited for companies that want cold email to generate a real pipeline.

Website

2. Belkins

Best for: Companies looking for an email-first outbound partner with strong deliverability tooling and the ability to run large-scale campaigns across multiple industries.

Belkins is one of the most well-known cold email-led outbound agencies, serving clients across North America and Europe. The company has invested heavily in proprietary deliverability tools such as Folderly and Frostbite, helping clients maintain inbox placement at scale. Belkins combines email outreach with list building and optional calling or LinkedIn support. It’s a strong option for companies that want an email-first outbound approach backed by solid infrastructure and broad execution capabilities.

Website

3. CIENCE

Best for: Enterprise organisations that need structured, process-driven cold email outreach integrated into large, established sales operations.

CIENCE operates at the enterprise end of the market, offering outbound programs that include cold email, SDR services, and data enrichment. Their email outreach is structured, process-heavy, and designed to support large sales organisations with complex reporting requirements. CIENCE is best suited for mature companies that need scale, consistency, and integration with existing sales operations rather than rapid experimentation.

Website

4. Sopro

Best for: UK and European B2B companies that prioritise compliant, brand-safe cold email outreach with a strong emphasis on personalization over volume.

Sopro is a UK-based outbound agency known for its email-first approach combined with LinkedIn engagement. They focus heavily on compliance and personalization, making them particularly attractive to European businesses concerned about GDPR and brand perception. Sopro’s model works best for B2B companies looking to build awareness and start conversations through email, with less emphasis on aggressive follow-up via calls.

Website

5.  Salescode

Best for: Enterprise IT and software companies that require compliance-focused, highly structured cold email outreach within regulated or risk-sensitive environments.

Salescode brings a highly structured, compliance-driven approach to cold email outreach, primarily serving enterprise IT and software companies. Their ISO certification and process rigour set them apart in regulated or risk-sensitive environments. While less focused on speed or experimentation, Salescode is a strong choice for organisations that value governance, documentation, and consistency in outbound execution.

Website

6. Pipeful

Best for: Teams that already understand outbound fundamentals and need help optimizing cold email infrastructure, deliverability, and sending architecture at scale.

Pipeful sits at the intersection of software and services, offering cold email infrastructure alongside outreach execution. The company focuses heavily on inbox setup, domain management, and sending architecture, making it appealing for teams experimenting with email at scale. Pipeful is best suited for organisations that already understand outbound fundamentals and want help optimising deliverability and infrastructure.

Website

Cold email vs multichannel outbound

Like we’ve already mentioned, cold email can generate interest on its own, but results tend to improve significantly when it’s reinforced by other channels.

Here’s how the two stack up.

Email works best when it supports human follow-up. Calls and LinkedIn messages turn curiosity into clarity, and then opportunity.

Why Cold Email Alone Is No Longer Enough

Inbox competition isn’t slowing down, especially with entire campaigns being run with the help of AI. Also, buyers are now more selective than ever, and it takes more time to earn their trust. 

That doesn’t mean that cold email no longer has a role to play in your outbound engine. It means that you need to pair your email efforts with other channels to deliver predictable results.

The businesses winning with outbound today use email to start conversations, then rely on experienced SDRs to continue them across channels. 

This is where providers like Profitbl stand out: cold email is not the strategy. It’s one lever within a structured GTM system.

Conclusion

The best cold email outreach companies in 2025 focus on relevance, restraint, and real conversations. They care about deliverability, personalization, and what happens after the reply.

If you’re a B2B SaaS or tech company looking to turn cold email into a qualified pipeline, choose a partner that treats email as part of a bigger outbound picture.

Book a 30-minute discovery call with Profitbl to see how we combine cold email, calls, and LinkedIn outreach to generate BANT-qualified opportunities.