Case Study

Profit Labs AI’s Cold Email Breakthroughs with >90% Positive Reply Rate Using Smartlead

Wajahat Ali
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February 24, 2026
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Key Highlights

  • 48 meetings booked for a client in a week
  • 40 meetings for another client with 550 leads
  • >90 positive reply rate for a campaign

Introduction

Robert Bradley, the founder of Profit Labs AI, specializes in providing done-for-you cold email outbound solutions for startups, offering them scalable outbound functions without needing added headcount or complex tech stacks. 

They focus on delivering consistent warm leads through multi-channel outreach. Profit Labs AI’s goal is to transform how startups approach lead generation, and their strategy is working consistently for their clients as the proof is in the numbers. 

This success, though, didn’t come overnight, as they had to struggle with a few challenges and switch their obsolete systems to scalable, automated solutions.

Challenges Before Smartlead

Before adopting Smartlead, Profit Labs AI faced significant hurdles:

  • Outdated outbound tools could not meet the demands of scaling multiple domains and inboxes.
  • Limited personalization and infrastructure capabilities hindered high-quality cold email campaigns.

How Smartlead Transformed Profit Labs AI’s Strategy

Since onboarding Smartlead 7-8 months ago, Robert and his team have witnessed remarkable results. Smartlead’s cold email solutions enabled Profit Labs AI to overcome limitations, build sustainable cold email infrastructure, and achieve outstanding campaign success. Here’s an example of one such campaign success:

Campaign Success: 40 Meetings from 550 Leads

One of Profit Labs AI’s standout campaigns demonstrates the results of using Smartlead:

  • Leads Contacted: 550
  • Reply Rate: 8%
  • Positive Reply Rate: >90%
  • Meetings Booked: 40

Key Campaign Highlights

Deep ICP & Buyer Persona Analysis

During client onboarding, Robert’s team conducted detailed research into their client’s Ideal Customer Profile (ICP) and buyer personas, focusing on their pains, aspirations, and specific needs.

AI-Powered Personalization

Using AI to analyze prospects’ artistic portfolios of images, the team crafted emails reflecting a deep understanding of their work, warming up leads and making the outreach highly impactful.

Advanced Email Infrastructure

Profit Labs AI employed a diverse mix of GSuite, Outlook, and SMTP accounts with low sending volumes and mailbox rotation, ensuring consistent delivery.

SmartDelivery for Performance Optimization

Smartlead’s SmartDelivery allowed the team to monitor campaign performance (email copy score/spam score) in real time and make adjustments to maximize deliverability and engagement.

Why Smartlead? The Features That Made a Difference

SmartSenders & SmartDelivery

  • SmartSenders enabled seamless ESP matching, helping optimize email deliverability and inbox placement.
  • SmartDelivery provided insights into email performance(spam score/email copy),  helping the team adjust and achieve consistent results.

API Integration

  • Smartlead’s API capabilities allowed Profit Labs AI to automate essential workflows, such as auto-replying to positive responses and auto-CCing primary emails, creating a streamlined process for lead management.

Spintax & Personalization

  • Spintax functionality was simplified, creating unique email variations and ensuring messages stood out in inboxes.
  • Integration with Clay enabled advanced personalization, elevating engagement rates significantly.

Email Infrastructure Management

  • Smartlead’s tools for sustainable email infrastructure allowed the team to scale campaigns without compromising deliverability.

Results Achieved with Smartlead

  • High Reply Rates: Smartlead’s infrastructure optimization resulted in an impressive 8% overall reply rate, with over 90% of replies being positive.
  • Meeting Bookings: In one campaign, 40 meetings were booked from just 550 leads, showcasing the tool’s ability to convert outreach into tangible results.
  • Advanced Personalization: Tailored campaigns using AI-driven insights led to a significant uplift in lead engagement.

Future Aspirations with Smartlead 

Robert looks forward to new features and solutions that Smartlead will bring to once again change email deliverability and help businesses scale their cold email outbound. 

Conclusion

Smartlead has empowered Profit Labs AI to redefine its cold email outreach, delivering exceptional results for its clients while optimizing internal processes. 

As Robert puts it:
“The capabilities of Smartlead to run sustainable email infrastructure and do ESP matching led to us achieving high reply rates.”

With Smartlead’s innovative solutions, Profit Labs AI continues to set new benchmarks in outbound lead generation, driving growth for startups worldwide. 

The cold email outbound is an ever-changing game, and you’ve got to keep up with it. With Smartlead, that becomes easier as we’ve become synonymous with email deliverability. Here’s your chance to be at the top of the email deliverability game; all you have to do is check out our 14-day free trial of Smartlead.

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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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Cliff Coelho

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David Borman

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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.