Case Study

Rapid Labs Scaled to 70k Cold Emails/Month & Generated $300k in Revenue with Smartlead

Wajahat Ali
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Published On
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Updated On :
February 24, 2026
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Created On:
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Updated On:
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Key Highlights

  • 60k–70k cold emails/month sent across multiple clients.
  • 200k–300k in revenue generated in 3 months.
  • 92.31% unique positive replies from 251 contacted leads.

Client Overview

Qamar Mohyuddin, Cold Email & Clay Expert at Rapid Labs, specializes in scaling outreach for businesses requiring high-volume campaigns. With 4+ years of experience, Qamar manages cold email outreach for:

  • Market Research & Expert Recruitment Firms
  • Software Development Companies
  • Rapid Labs’ AI & Digital Transformation Services

Rapid Labs’ campaigns focus on converting technical decision-makers (CTOs, CIOs) from AI and Digital Transformation Businesses into clients.

Challenges Before Smartlead

Despite his extensive experience and using well-known cold email outreach tools, Qamar struggled with:

Scalability Limits

Other cold email outreach tools weren’t fully equipped to handle his scaling requirements properly.

Clunky UI

Campaign setup took hours due to poor workflows and clunky UI.

Zero Priority Support

Tickets went unresolved, and user support wasn’t a priority.

Inflexible Use Cases

Couldn’t manage diverse clients (recruitment, software, AI) in one platform.

Why Smartlead?

Despite using other trending tools for over 4 years, Qamar switched to Smartlead after hearing other industry experts talk about Smartlead on LinkedIn. Here are a few things that led to the switch:

  • High-Volume Capacity: Built for 100k+ emails/month.
  • Intuitive UI: “Campaigns take minutes, not hours, to launch.”
  • Reliable Email Deliverability: AI-powered inbox placement.
  • Responsive Support: “Issues get solved before they become fires.”

Solutions & Features That Made the Difference

1. Unified Campaign Management

  • Ran campaigns for 3+ client verticals in one dashboard:
    • Market Research: Targeted C-suite executives for expert recruitment.
    • Software Dev: Reached CTOs needing custom solutions.
    • AI Services: Pitched digital transformation to CIOs.

2. One-Click Scaling

  • Increased sending volume to 70k emails/month with zero downtime.
  • Used Smartlead’s automation rules to segment lists and personalize at scale.

3. Drag-and-Drop Campaign Builder

  • Cut setup time by 70% vs. previous tools.

4. Deliverability Peace of Mind

  • Maintained 95%+ inbox placement rate using:
    • Automated warm-up.
    • Domain rotation.
    • Real-time spam score checks.

Key Results Achieved

Rapid Labs using Smartlead
  • 60k–70k cold emails/month sent across multiple clients.
  • 200k–300k in revenue generated in 3 months using Smartlead.
  • 92.31% unique positive replies from 251 contacted leads.
  • Significant reduction in time for campaign setups.
“Smartlead is the only tool that keeps up with our volume without sacrificing deliverability. The UI is so user-friendly that even new team members can launch campaigns in minutes.”

Conclusion

By replacing fragmented tools with Smartlead’s all-in-one platform, Qamar transformed Rapid Labs’ cold email operations from a technical burden to a scalable revenue engine. Their results prove that volume and precision can coexist—if you have the proper infrastructure.

If you want to scale your cold email game and revenue, here’s a free 14-day Smartlead trial to get you started.

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Wajahat Ali

Wajahat Ali is a Technical Content Writer at Smartlead, specializing in the B2B and SaaS sectors. With a talent for simplifying complex concepts, he crafts clear, engaging content that makes intricate topics accessible to both experts and newcomers. Wajahat’s expertise spans across copywriting, social media content, and lead generation, where he consistently delivers valuable, impactful content that resonates with a global audience. His ability to blend technical knowledge with compelling storytelling ensures that every piece of content drives both understanding and results, helping businesses connect with their target markets effectively.

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What our customers say

Bojan Najdov

Founder, Lambda Group

“The best outbound email marketing software. Customer support - they are so responsive and helpful Features - you can add multiple email doma”

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Arnold Koci

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Cliff Coelho

Owner, Storydriven.video

“I just ended my 2 year search for the right cold emailing platform with Smartlead. A stand alone tool for cold emailing unlike anything else”

David Borman

Senior Account Executive, Key Outreach

“Intuitive. Game-Changing. POWERFUL. Analytics, spintax, A/B testing, quick personalization. This is a game changer if you send cold email campaign. Grateful to this team for building a product that has changed our day to day. 🚀”

Powerful automated workflows that drive sales.

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Frequently asked questions

What is Smartlead's cold email outreach software?
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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?
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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"?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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.