You’ve heard the buzz around “hybrid AI lead generation.” But what does that actually look like on the ground? Let’s learn about this from Wesley Hoang - the co-founder of Cymate, a company laser-focused on cold outreach for the tech space, working with a roster of startups that includes Y Combinator, Techstars, and First Round Capital portfolio companies. Wesley brings a “dev mindset” to outreach, meaning he loves automation, data, and rigorous testing. And from the get-go, he recognized that scaling thousands of emails per day with deliverability as a top priority would require the right platform.

He tried a few tools. Some were okay for smaller volumes. Others claimed they had a magical approach to spam triggers. But eventually, Wesley landed on SmartLead, hooking onto the Slack channel and devouring the latest updates in deliverability strategies. It felt like a perfect match for his engineering approach. 

The Birth of Cymate: From Startup Acquisition to Cold Outreach Agency

Phase 1: Early Startup Hustle

Wesley didn’t jump into agency life straight out of college. In fact, he’d already launched and sold a startup of his own, using cold email to drive user acquisition. That success story left Wesley and his co-founder wondering: Why not replicate these same outbound tactics for other SaaS companies? They had the skill set, the experience, and a proven track record in scaling a tech product from zero to acquisition. So they decided to form Cymate.

Phase 2: Manual Processes & Google Sheets

But before the big breakthroughs, Cymate’s day-to-day looked a lot like many other bootstrap teams: manual drudgery in Google Sheets. Wesley recalls that they tried to replicate advanced lead-enrichment tools (like Clay) on their own. They’d compile data from scattered sources, copy-paste prospect lists, and email them in small batches. It worked on a modest scale, but it was far from efficient.

As inbound requests piled up, the two-person show started to drown in repetitive tasks—tagging out-of-office replies, forwarding leads, checking deliverability stats daily. They realized quickly that “just send emails” wasn’t going to cut it for the next phase of growth. They needed robust automations, integrated Slack notifications, and real-time domain management to ensure they never landed in spam.

Phase 3: Officially Going “All-In”

Around mid-to-late 2023, Wesley and his co-founder decided to double down. They hired a team, rebranded themselves as a serious B2B marketing consultancy, and set a bold target: achieve seven-figure agency status. They worked predominantly with software clients—though 5–10% of their client base ended up being service companies or agencies. The big difference was scale. Instead of emailing 50 or 100 people a day, they jumped to thousands—hitting up prospects on email and LinkedIn, backed by advanced data scrapes and lead enrichment.

According to Wesley, that’s exactly when deliverability became mission-critical. You can’t keep ramping up volume if your domain reputations get torched. Cue the search for a tool that wasn’t just “fine”—it had to excel at handling huge volumes, advanced personalization, and ongoing spam filter changes.

How Smartlead’s Deliverability Stole the Spotlight

Trial and Error with Other Platforms

Wesley freely admits he tried multiple competitors before landing on SmartLead. Early on, he used a simpler platform for “just sending emails,” but quickly noticed deliverability issues once volume went up. Some tools offered borderline solutions—like spin tags—but didn’t truly address the deeper deliverability puzzle. Others lacked an active dev community, meaning new spam rules could blindside them.

In time, Wesley started hearing about SmartLead from colleagues in Slack communities. He was particularly drawn to the open communication from the SmartLead team regarding deliverability updates. They weren’t just saying, “We do domain warming.” They publicly teased upcoming features aimed at staying ahead of Outlook’s or Gmail’s next wave of restrictions. That resonated with Wesley’s approach: Always be testing, always be iterating.

Making the Switch

By the time Wesley joined the SmartLead Slack channel, he was already half-sold. The Slack group was buzzing with agencies who used advanced strategies, some pushing out tens of thousands of emails daily without a meltdown. That’s exactly what Cymate needed. Wesley also had a “tech guy” perspective: How clean is the API? How quickly can I integrate with my own dashboards?

It turned out that SmartLead’s API was not only well-documented but also deeply flexible. On top of that, the dev team was releasing deliverability features that directly tackled real-world spam triggers, not just “basic spin tags.” So Wesley made the call. He ported all his campaigns over to SmartLead about 1.5 to 2 years ago, and he hasn’t looked back since.

A Closer Look at the Key Challenges 

Scaling from Hundreds to Thousands

When you scale from sending a few hundred emails to thousands or even tens of thousands per day, you uncover hidden challenges:

1. Volume Personalization: It’s one thing to send 500 well-personalized emails a day. It’s another to multiply that by 10 or 20, while still keeping the campaign relevant.
2. Inbox Tagging & Sorting: If every campaign yields hundreds of auto-replies or out-of-office messages, you can drown in noise. That overhead used to eat up hours at Cymate.
3. Domain Reputation Management: One slip-up can get your domain flagged, halting new leads for weeks—disastrous for a growing agency.

The Outbound Tactics That Worked

From the transcript, we can glean a few “secrets” Wesley used:

• Heavily rely on volumes: He’s a big believer in sending out more emails rather than capping at tiny, hyper-targeted lists. The logic? If a carefully curated list yields 10 leads, a bigger (but still relevant) list might yield 100.
• Test, test, test: Wesley used to do a ton of manual tests in Google Sheets, but with tools like Clay (for data enrichment) and SmartLead (for deliverability), he can now run experiments at scale.
• Write copy that resonates: Many agencies get lost in domain-warming theories, but Wesley says your “biggest weapon” is good writing. If recipients genuinely like your email, they’ll reply, and that positive feedback loop boosts sender reputation over time.

Cymate’s Implementation: Why SmartLead Became the Linchpin

1. The API: A Godsend for Tech-Driven Agencies

A recurring theme in Wesley’s story is how integral SmartLead’s API capabilities are for day-to-day operations. As a software engineer at heart, Wesley’s big on building custom automations:

• Auto-Routing Positive Replies: The minute a lead replies with interest, that conversation can be forwarded to the client’s CRM or Slack channel—no manual copying and pasting required.
• Tagging and Categorization: Out-of-office messages or unsubscribes get flagged automatically, saving the team hours every day.
• Team Dashboards: Instead of logging into multiple tools, Cymate’s internal dashboards integrate with SmartLead’s data so everything is visible in one place.

According to Wesley, a robust API basically means you can “bend the platform to your will,” which is crucial when you’re scaling fast and need custom solutions, not just a one-size-fits-all approach.

2. Proactive Deliverability Updates

SmartLead’s consistent deliverability improvements are another factor Wesley praises. At times, the devs introduced features like Smart Delivery or specialized warming strategies to counter new spam triggers from Outlook or Gmail. He’s honest that he can’t test every single new feature—Cymate works with so many clients that they don’t have the bandwidth to experiment on everything. But he’s comforted knowing the platform is always refining its approach.

He also mentions that smaller cold email platforms might brag about having fewer users and thus “less suspect data pools.” However, Wesley points out that it’s better to stick with a proven tool that invests heavily in R&D, even if it has a bigger user base. Because, let’s face it, domain warming and spam filtering are always changing. It’s an arms race, and you want a platform that stays on top.

Results & Business Impact: Thousands of Positives, 7-Figure Success

1. Staggering Influx of Leads

In the transcript, Wesley references a campaign so successful that Cymate had to hire a full-time inbox manager for a single client. They were hitting 50 to 100 positive replies a day, sometimes even more. Over three months, they racked up around 1,700 positive responses—enough to make the client say, “Stop! We need to funnel leads more cautiously or have them watch a video first.” That’s a pleasant “problem” to have, signifying big success.

For Wesley’s own agency pipeline, one record-setting month featured 87 discovery calls, with 82 or 81 coming directly from SmartLead-driven cold emails. Combined with other marketing channels, that momentum propelled Cymate to cross the seven-figure revenue mark.

2. Minimizing Time-Draining Admin Work

Before SmartLead, Wesley’s team had to label each email manually or create messy Google Sheets macros. Now, auto-tagging, Slack notifications, and API-driven workflows handle the grunt work. This shift freed them to focus on strategic tasks like refining copy, analyzing new markets, or personalizing outreach at scale—activities that directly fuel growth, rather than administrative chores that drain energy.

3. Lessons on Deliverability & Domain Health

Wesley underscores a major lesson: Your copy is your best deliverability shield. If your content is truly relevant, recipients open and reply, which signals to email providers that your messages deserve prime real estate. He also reminds us that best practices can vary depending on whether you’re using Gmail or Outlook, and that consistent domain reputation building is a marathon, not a sprint. In his words, “Write good copy, stay consistent, pick a deliverability provider you trust, and the rest sorts itself out over time.”

Challenges & Candid Feedback

1. The QA Perspective

Interestingly, Wesley has a QA automation background. From that vantage point, he recommends that SmartLead (and similar platforms) thoroughly test new features before rollouts. In his experience, a big new update can introduce minor bugs for about a week—but he praises how quickly the devs patch things up. He’s not deterred; he just suggests that robust “regression testing” could reduce these post-release hiccups.

2. Potential for Over-Delivery

Another subtle challenge is that, ironically, Cymate can sometimes flood a client’s pipeline with too many leads. That’s not a standard complaint in outbound marketing, but it can happen if the product-market fit is on point and the outbound copy is compelling. The fix? Manage volumes carefully or implement gating steps, like requiring prospects to watch a short video before booking a call—ensuring only the most serious leads come through.

3. Long-Term Partnership Over Switching Tools

Given how deeply integrated Cymate’s system is with SmartLead’s API and deliverability infrastructure, Wesley shudders at the idea of migrating. “I do not want to switch to another software,” he jokes. He’d rather see SmartLead continue to improve than risk the hassle of moving all his clients. This speaks to the platform’s sticky value: once an agency invests in building out custom workflows, it’s not easy to replicate that environment elsewhere.

The Road Ahead: Cymate’s Future with SmartLead

Wesley frames Cymate’s trajectory as closely tied to SmartLead’s own evolution. As the platform invests in more deliverability breakthroughs, more advanced domain warming, or refined A/B testing, Cymate can keep scaling. The feedback loop is straightforward:

1. Cymate wants to onboard more SaaS clients, especially from top-tier accelerators.
2. SmartLead needs to maintain its “proactive approach” to new spam triggers, ensuring that large-scale campaigns remain stable.
3. Both parties benefit if each new feature release is stable and thoroughly tested, letting agencies like Cymate expand their daily outreach without worrying about sudden deliverability dips.

Wesley also hints that cold outreach might branch into more AI-driven personalization. Tools like Clay are just the start—there are broader possibilities for multi-channel prospecting that merges email, LinkedIn, and maybe even direct mail. In all those expansions, deliverability remains the top concern. If your emails never make it to the inbox, no personalization trick can save you.

Considering a Pivot to Large-Scale Cold Outreach?

The story of Cymate is a testament to how a small team can morph into a seven-figure agency by leveraging the right tools, best practices in deliverability, and a continuous improvement mindset. Wesley Hoang’s journey from manual Google Sheet chaos to advanced API automations perfectly illustrates the marriage of engineering rigor with creative outreach.

If you find yourself nodding along to these challenges—struggling with domain reputation, overwhelmed by thousands of leads, or simply looking for a platform that can integrate seamlessly with your custom workflows—SmartLead might just be your next best move. As Wesley says, “Pick a solution you trust, stick with it, and keep refining your copy. Over time, you’ll see stable deliverability and great results.”

That’s the real power of combining a technical background, a thirst for data, and a platform built for agencies pushing the limits of cold outreach. If that resonates with you, it might be time to consider giving SmartLead a try—and forging your own path toward unstoppable pipeline growth.

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