Ever wonder what happens if you combine two cold email masterminds who believe in zero capital, zero marketing spend, and purely outbound hustle? You get Letstrike—an agency that’s grown to 500+ clients purely by harnessing the power of advanced cold email strategies. Its co-founders, Charles Moriceau (COO) and Max Moriceau (CEO), share the same last name (and a lot of the same drive). They carved out a reputation for producing insane numbers of sales meetings for B2B companies. Their tagline, “get leads straight in your inbox,” pretty much sums up what they do.
But how do you keep scaling an agency that juggles multiple subdomains, multiple languages, and multiple clients in one place—without your domain (or your brain) going up in flames? Let’s just say the duo found the answer in Smartlead, a tool that helped them unify their approach, maintain top-notch deliverability, and avoid the dreaded spam folder. And they’re here to share how it all went down.
The Letstrike Origin Story: From 0 Capital to 500 Clients
Let’s rewind a bit. Charles had been in the cold emailing space for about a decade, first experimenting when he ran a video production company and quickly grew it to 50 employees. He realized that once you crack cold outreach, you can do wonders—like fueling a full-blown pipeline with minimal ad spend. Meanwhile, Max had a background in software sales, wearing hats like Country Manager in Australia for a software integration partner. Both recognized that outbound works—if you do it right.
So they decided to form Letstrike roughly six years ago, with the dream of building a “done-for-you cold emailing solution” that B2B businesses could rely on to scale. Early on, they discovered they had a knack for not only booking a few calls here and there, but for delivering real volumes of qualified leads. By leaning on purely outbound channels, they soared to 500+ clients over the years. Not too shabby for a duo that never spent a dime on marketing, right?
Max’s summary: “We’ve grown on zero capital, zero marketing, purely cold emailing—and that’s the story we love to tell.” Indeed, for them, it’s a badge of honor that they built something that soared without big marketing budgets.
The Pain Points: Managing Multiple Clients, Emails, and Domains
As Letstrike grew, so did the complexity of managing all these client campaigns. Imagine you have 100 or more active clients:
- Each with their own domain or subdomain.
- Possibly running multiple inboxes per domain.
- Possibly sending thousands of cold emails daily in different languages (they’ve done French, German, Spanish, Italian, you name it).
How do you keep track of all these inboxes, ensures deliverability, and rotate addresses so none get hammered? Charles recalls that in the old days, they tried “Yet Another Mail Merge,” or other simpler solutions. But that quickly became a headache: no advanced domain warm-up, no fail-safe for domain meltdown, no sophisticated analytics beyond basic open/click rates.
Meanwhile: Deliverability was becoming a real challenge in the 2020s. Gmail and Microsoft Outlook had ramped up spam detection, so if you tried “spray-and-pray,” you were toast. Letstrike needed a platform that was:
- Agency-Friendly: Let them handle multiple subdomains and clients from one place.
- Deliverability-Focused: Domain warm-ups, multi-inbox rotation, real-time stats.
- Scalable: They wanted to unify everything under one roof, not log into 50 different dashboards.
Discovering Smartlead: “This is Built for Agencies”
At some point, the duo came across Smartlead (they mention hearing about it in various cold emailing circles). The big draw? They needed a tool that was basically “one dashboard to rule them all,” especially for an agency model. Charles and Max put it this way: “If you try to manage 100 separate seats with a smaller tool, you spend all day in admin chaos. Smartlead let us unify them.”
What stood out:
- Multi-Domain & Multi-Inbox: You can add 10, 20, 50, or 100 inboxes across different domains, all orchestrated from a single platform.
- Advanced Warm-Up: If you’re launching new addresses for a client, you can warm them up automatically, simulating natural conversation patterns.
- User Roles & Collaboration: The ability to manage sub-accounts or client views in a more fluid way.
- Unified Billing: Instead of separate invoices for each domain or seat, you get consolidated billing. That might sound small, but for an agency with 100+ clients, it’s gold.
And so, Letstrike jumped in with both feet, migrating a chunk of their campaigns to Smartlead. The result: they found it simpler to handle day-to-day domain checks, deliverability audits, campaign changes, and more.
The Letstrike Approach: 100% Cold Email, Multiple Languages
One unique aspect: Letstrike didn’t confine themselves to just English or a single region. They have native speakers on their team who can do cold outreach in Spanish, French, German, or Italian. This is actually a huge draw for their clients, who might want to break into the European or Australian markets. The challenge, though, is that each language might require a separate domain or subdomain with its own warm-up. Because, guess what, sending Spanish emails from a domain that’s brand-new could set off red flags for spam filters.
But with Smartlead: They could systematically spin up new subdomains for each language or region, warm them up, and manage them from that single Master Inbox. If an inbox has a problem, the dashboard flags it. They rotate to a new address, tweak the sending times, or run a deeper deliverability audit. No more guesswork or manual patchwork solutions.
A Notable Success Story: The 300 Meetings in 6 Months
When asked about a favorite success story, Charles recalled a Spanish software reseller (Google partner) that needed a serious inbound of leads. They’d never used cold emailing in a formal sense. Letstrike built a campaign in multiple Spanish dialects—even Catalan—across different target industries, hooking them up with carefully segmented sequences through Smartlead. The result was 300 qualified leads over six months. The client closed 70 deals from that wave alone. For them, that’s game-changing.
Max’s perspective: “Sure, not all clients see that same ratio, but it shows what’s possible if you do it right—right domain warm-ups, relevant messaging, triggered steps, local language personalization.” Because the synergy of a tool like Smartlead plus Letstrike’s methodology can open new markets very quickly.
The “Priceless” Features Letstrike Relies On
Of all Smartlead’s goodies, here’s what Charles and Max say they rely on most:
- Domain & Inbox Rotation: Spreading out sending volume across multiple addresses, each warmed up, so you’re not hammering from a single domain.
- Centralized Dashboard: They can see every campaign, every domain status, every conversation, all from one vantage point.
- Automation for Agencies: Billing is consolidated, user roles are straightforward, and you don’t have to juggle 100 separate seats or logins.
Evolving from the “Old Days” of Basic Tools
Both Charles and Max reminisced that once upon a time, it was enough to do Google Sheet merges. You might insert a few placeholders, send 300 daily from your personal Gmail, and still get decent replies. But times changed: domain blacklisting grew stricter, spam filters more thorough, and competition soared. Now you actually need advanced domain health, or your bounce/spam complaint ratio can kill everything in a week.
Their main lesson: “We see a lot of people do cold emailing the wrong way, spamming 10,000 random leads with no triggers or personalization. That might have worked in 2019, but no longer.” For Letstrike, the synergy of new technologies plus a platform like Smartlead let them maintain the high domain rep they need to keep pumping out leads for 500+ clients.
Limitations & Feedback: The Wish List
No platform is perfect, and Letstrike’s founders do have suggestions for how Smartlead could improve:
1. More Intuitive for Non-Tech Users: Because Letstrike runs a “done-for-you” approach, sometimes they’d like to hand over partial control to a client. They find that if you’re not an “email nerd,” the Smartlead interface can feel daunting. They might prefer a simpler UI for business owners.
2. Analytics / Exporting: They want an easier way to filter leads across multiple campaigns, or do advanced searches to export just the positives for a certain client, etc. Some improvements in global analytics or search filters could help.
3. Integrations with Multiple HubSpot Accounts: Letstrike’s clients sometimes each have a separate CRM environment. Plugging them all into Smartlead can get messy. They’d love more robust multi-CRM integration.
Still, these are more “nice to have” improvements for an advanced user scenario. For the typical agency or power user, Smartlead’s feature set is already comprehensive.
Key Takeaways From Letstrike’s Growth
As Max says: “The best approach is no approach if you can’t handle domain meltdown. The second best is something like Smartlead that’s built from the ground up for deliverability at scale.”
1. Go All-In on Domain Warm-Up: Letstrike is living proof that if you want to scale to 500+ clients, you can’t skip domain rotation, separate subdomains, and a careful ramp-up strategy. Tools like Smartlead do it seamlessly.
2. Localization & Relevance: Even the best platform won’t help if your content is generic. Letstrike’s multi-language approach with region-specific angles is how they break into markets across Europe (and beyond).
3. Centralized Management: If you have 100 or more clients, you can’t keep track of everything in random spreadsheets or seat-based logins. Letstrike avoided an admin nightmare by choosing a platform that’s built for agencies from day one.
4. Keep Innovating: The environment is constantly evolving – so is spam detection. Letstrike invests in new multi-channel expansions (like LinkedIn or SMS) and leverages data from tools like Clay or K-Reach. The result is that they remain relevant, even as old methods get hammered.
Fina Thoughts On Letstrike’s Recipe for “Zero Capital, 500 Clients”
So how do you go from zero marketing budget to half a thousand paying clients in a few short years? For Charles and Max, it’s the combination of a bulletproof outbound methodology, multi-lingual angles, and a deliverability-focused tool like Smartlead that orchestrates it all. They emphasize that it’s not just about the quantity of emails; it’s about the right quantity, timing, domain rotation, and personal touch.
Charles’s final note: “I started in cold email with a Google Sheet hack. Now we run everything from a single platform that handles hundreds of clients, multiple domains, advanced analytics. That’s leaps and bounds from the old approach. And it’s let us build an entire business that stands on its own legs, purely from cold outreach.”
If you’re an agency or a B2B software outfit that’s feeling the deliverability crunch, maybe it’s time to take a page from Letstrike’s playbook. The next time you’re swamped in your seat-based, not-so-scalable tool, or your domain is flirting with the spam folder, remember: there’s a platform designed with agencies in mind - Smartlead. And according to Letstrike, it’s a game-changer for anyone chasing big volumes and big results – without the big risk of domain meltdown.
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Founder, Practical Prospecting
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Founder, Experiment5m
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Founder, Practical Prospecting
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Founder, Leadodo
Smartlead syncs effortlessly with Leadodo's lead database, making the job much easier for us. Smartlead's support team works 24/7 to help you with any issue, which is a welcome change from other support services.
Co-Founder & COO, Trigify
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Founder, Spring Drive
My agency, for all of our clients as well as for our own campaigns, relies on Smartlead. It has truly become a cornerstone of our growth. Our reply rates are approximately 500% higher compared to those we experienced with legacy tools.
Co-Founder & CEO, Danish Lead Co.
We run our entire business on your platform. We're sending plus 500,000 emails a month right now. The fact that we're able to do that and still primarily land in the inbox, all of that wouldn't have been possible without Smartlead.
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AI will beat me at every level, so I learned how to use it instead of competing against it. 130% company growth in one year, 62% positive reply rate, $8.19M in staffing sales.
Advisor, Trailway Growth
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Founder, B2B Boosted
We're probably averaging about 140 meetings per month, and most of them are coming from emails.
CEO, LearnEmail.com & MailGenius
With Smartlead, I was able to generate between 6,000 and 8,000 opt-ins and over 15,000 replies from cold email campaigns. Smartlead has excellent customer support, and Vaibhav is one of the best leaders I've ever seen. 620 replies in a single day with just 178 mailboxes. I scaled up to 8,800 emails a day and 450,000 emails a month.
Co-Founder, letstrike
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Smartlead has been a game-changer for us. The API and automation features have allowed us to streamline our processes and scale our campaigns without adding more team members.
Co-Founder, letstrike
We've grown on zero capital, zero marketing, purely cold emailing - and that's the story we love to tell. The best approach is no approach if you can't handle domain meltdown. The second best is something like Smartlead that's built from the ground up for deliverability at scale.
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From day one, we've never used anything else.
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Since using Smartlead, my clients have added millions in pipeline revenue, closed six-figure deals, and gotten 38 new customers in a single month.
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I use Smartlead.ai every day across all my client accounts and it's become absolutely indispensable! From the beginning, Smartlead enabled us to build client access. Everything has been driven around making people like us revenue.
Chief Executive Officer, Infoxify
It is a seasoned/advanced tool to send cold emails to your prospects. Many great features are there to improve the deliverability. Customer support is very nice, though it may take a while for you to get answer (It's not prompt response unless you are on their higher tier plan).
Founder, PLNITUDE
Game changing tool for my agency, helping us generate 6-figures+ for our lead generation clients! Client Access and white-labeling have been a game-changer, saving us countless hours. With Smartlead, I'm happy with everything, but then I check their Slack community, and there's a new feature that just dropped!
Associate Manager - Marketing
I use Smartlead for cold outreach, and it really simplifies things for me. I love how it handles the email warming up automatically and delivers emails without harming my domains. It's easy to use, and anyone can start with it, which is great. I also appreciate the option to set specific intervals between each email sent, as it just works right.
Powerful automated workflows that drive sales.
Frequently asked questions
What is Smartlead's cold email outreach software?
Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.
How does Smartlead's unlimited mailboxes feature benefit me?
Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.
What do you mean by "unibox to handle your entire revenue cycle"?
The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.
With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.
2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.
3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.
Can Smartlead help improve my email deliverability rates?
Yes, our cold emailing software is designed to significantly improve your email deliverability rates. It enhances email deliverability through AI-powered email warmups across providers, unique IP rotating for each campaign, and dynamic ESP matching.
Real-time AI learning refines strategies based on performance, optimizing deliverability without manual adjustments. Smartlead's advanced features and strategies are designed to improve email deliverability rates, making it a robust choice for enhancing cold email campaign success.
Can I integrate Smartlead with other tools I'm using?
Certainly, Smartlead cold email tool is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!
What is Smartlead, and how can it enhance my cold email campaigns?
Smartlead is a robust cold emailing software designed to transform cold emails into reliable revenue streams. Trusted by over 31,000 businesses, Smartlead excels in email deliverability, lead generation, cold email automation, and sales outreach. A unified master inbox streamlines communication management, while built-in email verification reduces bounce rates.Additionally, Smartlead offers essential tools such as CNAME, SPF Checker, DMARC Checker, Email Verifier, Blacklist Check Tool, and Email Bounce Rate Calculator for optimizing email performance.
How does Smartlead, as a cold emailing tool, automate the cold email process?
Smartlead’s robust cold email API and automation infrastructure streamline outbound communication by transforming the campaign creation and management processes. It seamlessly integrates data across software systems using APIs and webhooks, adjusts settings, and leverages AI for personalised content.
The cold emailing tool categorises lead intent, offers comprehensive email management with automated notifications, and integrates smoothly with CRMs like Zapier, Make, N8N, HubSpot, Salesforce, and Pipedrive. Smartlead supports scalable outreach by rapidly adding mailboxes and drip-feeding leads into active campaigns Sign Up Now!
How does Smartlead ensure my emails don't land in the spam folder?
Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder.
Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.
2. We deploy high-deliverability IP servers specific to each campaign.
3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.
What features does Smartlead offer for cold email personalisation?
Smartlead enhances cold email personalisation through advanced AI-driven capabilities and strategic integrations. Partnered with Clay, The cold remaining software facilitates efficient lead list building, enrichment from over 50 data providers, and real-time scraping for precise targeting. Hyper-personalised cold emails crafted in Clay seamlessly integrate with Smartlead campaigns.
Moreover, Smartlead employs humanised, natural email interactions and smart replies to boost engagement and response rates. Additionally, the SmartAI Bot creates persona-specific, high-converting sales copy. Also you can create persona-specific, high-converting sales copy using SmartAI Bot. You can train the AI bot to achieve 100% categorisation accuracy, optimising engagement and conversion rates.
Is Smartlead suitable for both small businesses and large enterprises?
Smartlead accommodates both small businesses and large enterprises with flexible pricing and comprehensive features. The Basic Plan at $39/month suits small businesses and solopreneurs, offering 2000 active leads and 6000 monthly emails, alongside essential tools like unlimited email warm-up and detailed analytics.
Marketers and growing businesses benefit from the Pro Plan ($94/month), with 30000 active leads and 150000 monthly emails, plus a custom CRM and active support. Lead generation agencies and large enterprises can opt for the Custom Plan ($174/month), providing up to 12 million active lead credits and 60 million emails, with advanced CRM integration and customisation options.