Gmail API Startups

Badis Kalfalahi launched LeadGuru.io in September 2016 as a side hustle while attending Achèse Paris business school, building a service that outsources cold-email campaigns for B2B companies. The company reached $19,000 MRR with 24 customers paying an average of $800/month through a subscription model, generating approximately $45,000 in revenue over eight months. After his CTO departed, Badis pivoted to partnering with Reply.io instead of building proprietary tech, focusing on the service and sales aspects of the business.