Jonathan Maurin, Founder & CEO of Derrick App

Jonathan Maurin

Founder & CEO · Derrick App · Marseille, France

10+ years building B2B sales tools, LinkedIn outreach playbooks + data enrichment workflows. Founded Derrick App (Google Sheets add-on, 31k+ users) and Growth Mindset (B2B agency). Previously founded and sold deux.io, a growth agency. Authored 300+ guides on data enrichment, LinkedIn prospecting + sales automation.

LinkedIn Growth Mindset Email

Expertise

B2B Sales Prospecting LinkedIn Outreach Sales Navigator Data Enrichment Google Sheets Add-ons Cold Email Lead Scoring GDPR Compliance Sales Automation Model Context Protocol (MCP) AI for Sales

Where I work + past ventures

Founder · since 2022

Derrick App

Google Sheets add-on for B2B data enrichment. Find emails, phones, LinkedIn data, SIRET/SIREN, tech stacks - directly in your spreadsheet. 31,000+ users, REST API + MCP server for AI clients.

Visit derrick-app.com →
Founder · since 2018

Growth Mindset

B2B growth agency. Cold email + LinkedIn outreach campaigns for SaaS, consulting + service companies. Tested 100+ outbound playbooks across FR / EU / US markets.

Visit growth-mindset.fr →
Founder · sold · 2014-2025

deux.io

Growth marketing agency I founded and ran for 8 years before exiting (acquired). Helped 200+ B2B SaaS startups build their growth motion - outbound, content, paid, SEO. The experience that taught me what tools sales teams actually need.

Sold in 2025 - no longer active

Published guides (300+)

Over the past 10 years I've published more than 300 guides on B2B sales prospecting, data enrichment, LinkedIn outreach + sales automation. Below the topical hubs I author + maintain on this site, grouped by silo.

Data Enrichment Guide (60 articles)Data Providers (7 guides)Data Attributes (8 guides)Data Quality (10 guides)Data Enrichment ROI (7 guides)LinkedIn Scraping (10 guides)Sales Navigator (6 guides)LinkedIn Profile (8 guides)LinkedIn Company Data (7 guides)Email Finder (7 guides)Phone Finder (6 guides)GDPR B2B Compliance (11 guides)Data Enrichment API (7 guides)Google Sheets Enrichment (7 guides)CRM EnrichmentIntent Data (4 guides)AI Data Enrichment (2 guides)Best Outreach Agencies (19 geo guides)B2B Marketing (3 guides)Company Data (4 guides)Recruitment SourcingLLM SEO / GEODerrick Tutorials (14 guides)

Latest from LinkedIn

Recent posts where I share concrete B2B sales tactics, Derrick feature releases, and outbound experiments.

Jonathan Maurin 2026-01

I spent 11 years building outbound machines

From cold email infrastructure to LinkedIn automation - what I learned scaling B2B sales for 100+ companies before building Derrick.

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Jonathan Maurin 2026-01

I sold a marketing agency after 11 years

Why I exited the agency game to build a product (Derrick) - lessons on focus, defensibility + recurring revenue.

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Jonathan Maurin 2025-08

Comparatif solutions phone enrich

Tested the top 7 phone enrichment tools on 100 real B2B profiles. Match rate, price, accuracy - the data speaks.

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Jonathan Maurin 2025-07

New Derrick feature: tiny but mighty

A small product update that ships big value - how we approach feature shipping at Derrick.

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SalesDorado 2026-01

91% des cold emails finissent à la poubelle

Interview chez SalesDorado sur les vraies métriques cold email + comment Derrick aide à survivre les filtres modernes.

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