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ListLab Tech Stack

AI-native marketplace platform in stealth launch mode

Technology, Information and Internet Los Angeles, California 11–50 employees Founded 2024 Privately Held

ListLab is a 2024-founded, 11–50-person AI-native SaaS startup in Los Angeles building a marketplace targeting a claimed $100T+ TAM. The tech stack—Rails, React, PostgreSQL, Sidekiq—reflects a pragmatic backend with a small, sales-heavy team (7 sales, 3 engineering, 3 marketing roles active) skewed heavily toward senior and lead hires, signaling founder-led GTM during stealth and an aggressive 90-day product launch window. Active hiring acceleration, multiple revenue streams by design, and a structured referral tree as a core project suggest the company is optimizing distribution mechanics before public launch.

Tech Stack 20 technologies

Core StackHubSpot Zapier Make Ruby on Rails React PostgreSQL Redis Next.js Cursor GitHub Copilot SendGrid n8n Apollo LinkedIn Calendly Sidekiq Browserbase Lemlist GoHighLevel Pipedrive

What ListLab Is Building

◆Challenges

Raising additional working capital
Reliance on referral outreach
Launching product in 3 months
Raising in stealth
Launching product in 90 days
Scaling investor relations
Rapid product launch
Referral-driven investor sourcing
Scaling outreach systems
Optimizing lead-to-close pipeline

▲Active Projects

Structured referral tree
Pipeline management
Pipeline maintenance in crm
Direct outreach campaigns
Playbook creation for outreach
A/b testing of messaging
Automation sequences
Build outreach machine
Integrate gtm stack
Build dashboards for pipeline visibility

Hiring Activity

Accelerating15 roles · 8 in 30d

Department

Sales

7

Engineering

3

Marketing

3

Finance

1

Seniority

Senior

9

Lead

2

Junior

1

Mid

1

Staff

1

Notable leadership hires: Head of GTM

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About ListLab

ListLab is building a marketplace platform designed to operate across economic cycles, with a stated focus on macro-resilient growth and AI-native architecture. The company is in stealth mode and targeting launch within the next three months. The founding team includes an experienced, technical founder and approximately two dozen equity-only team members. Core operational priorities center on pipeline management, outreach automation (playbooks, A/B testing, direct campaigns), and GTM stack integration. Current challenges include securing working capital, scaling investor relations, and operationalizing referral-driven sourcing within the compressed pre-launch timeline.

HeadquartersLos Angeles, California

Company Size11–50 employees

Founded2024

Hiring MarketsUnited States

Frequently Asked Questions

What is ListLab's tech stack?

Backend: Ruby on Rails, PostgreSQL, Redis, Sidekiq. Frontend: React, Next.js. Sales/GTM: HubSpot, Pipedrive, Zapier, Make, n8n, Lemlist, GoHighLevel, SendGrid. Development: Cursor, GitHub Copilot, Browserbase, GitHub.