The Tech Stack Powering a $50M ARR SaaS: Insights from lemlist Shared by Michel Lieben 🧠

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Michel Lieben 🧠

LinkedIn Author

Founder & CEO at ColdIQ | Tomorrow’s GTM Systems, Built for you 👉 coldiq.com

In a recent LinkedIn post, Michel Lieben 🧠 shared a detailed breakdown of the technology stack employed by lemlist, a SaaS company reportedly achieving $50 million in Annual Recurring Revenue (ARR). This comprehensive look into lemlist’s operational infrastructure offers valuable insights for businesses aiming for significant growth.

Michel Lieben 🧠 highlights the breadth of tools lemlist utilizes across various business functions. The post reveals a meticulously curated selection of software designed to optimize data management, sales engagement, content creation, and customer support. As Michel Lieben 🧠 notes:

“Every tool that runs a $50,000,000 ARR SaaS 👇 lemlist’s team shared their entire stack with me. Here’s what it looks like:”

Deconstructing the Stack: From Data to Deliverability

The analysis presented by Michel Lieben 🧠 breaks down lemlist’s technology into fifteen distinct categories, illustrating a strategic approach to leveraging software for scale. Key areas covered include data acquisition, email deliverability, AI integration, and sales engagement.

Data and Deliverability Foundations

Under the ‘Data’ category, lemlist relies on a suite of tools including Clay for data and workflows, Apollo.io for lead sourcing, and Crunchbase for funding data. For ensuring email reach, the stack includes lemwarm for email warmup and Infraforge for cold email infrastructure. Michel Lieben 🧠 points out the importance of these foundational elements, stating:

“Data – Clay: Data & workflows, Apollo.io: Lead sourcing, Crunchbase: Funding data, BuiltWith: Technology data, lemlist: All-in-one prospecting, People Data Labs: B2B database”

According to Michel Lieben 🧠, this robust data infrastructure is crucial for targeted outreach and informed business decisions.

Leveraging AI and Intent Signals

The post also delves into lemlist’s adoption of AI and sophisticated intent signal tools. Michel Lieben 🧠 details the use of platforms like Dust for intent agent building and OpenAI & Mistral AI for core AI models. This suggests a forward-thinking approach to automating tasks and gaining deeper market insights.

Sales Engagement and Content Strategy

In the realm of sales engagement, lemlist utilizes its own platform, ‘lemlist,’ for prospecting, as highlighted by Michel Lieben 🧠. For content strategy and SEO, the company employs tools such as Semrush, Taplio for LinkedIn ideation, and Ahrefs for keyword research. Michel Lieben 🧠 observes:

“Content – Semrush: SEO analytics, Taplio: LinkedIn ideation & analytics, Ahrefs: Keyword research & ranking, Figma: Infographic & carousel design, PartnerStack: Affiliate program management, Google Search Console: Organic performance”

This comprehensive content toolkit underscores a commitment to organic growth and effective online presence.

Website, Inbound, and Sales Operations

Michel Lieben 🧠’s analysis extends to website management, where Storyblok serves as the headless CMS, and product analytics are tracked via Mixpanel. For inbound workflows, Customer.io is used for email marketing, supported by Hightouch for reverse ETL. The sales operations are managed through HubSpot CRM, with lemcal for meeting scheduling and Hyperline for contracts.

Customer Support, Prototyping, and Production Data

Customer support is handled by Intercom, while prototyping benefits from Vercel V0 for UI code generation. In production, lemlist leverages BigQuery as a data warehouse and dbt Labs for data transformation. Michel Lieben 🧠 notes the critical role of these systems in maintaining and scaling operations.

Communication and Automation

Team communication and collaboration are facilitated by Slack and Notion, respectively. For advanced automation, the company utilizes n8n. Michel Lieben 🧠 concludes the post by posing a question to the audience about potential missing elements that could help lemlist reach $100 million ARR, indicating an ongoing pursuit of optimization.

The detailed stack shared by Michel Lieben 🧠 offers a transparent view into the technological backbone of a successful SaaS company, providing a valuable resource for industry professionals.

📝 About This Content

This article is based on insights shared by Michel Lieben 🧠 on LinkedIn.

📅 Originally posted on April 23, 2026 | View original post on LinkedIn →