Sidedoor

Overview

Sidedoor is an AI-driven relationship intelligence tool designed to bypass cold job application queues by mapping warm referral paths. Users paste any job posting or web URL, and Sidedoor scans connected personal and extended social graphs—including Gmail, LinkedIn, Twitter, Instagram, and Outlook—to surface direct or second-degree connections. By identifying mutual contacts and colleagues who can introduce the user, Sidedoor turns cold job hunting into targeted warm introductions, significantly boosting response and interview rates.

What it does

• Scans connected user accounts across Gmail, LinkedIn, Twitter, Instagram, and Outlook to construct a multi-graph network model
• Parses pasted job posting URLs to match target company roles against mapped first and second-degree connections
• Surfaces mutual acquaintances and former colleagues who can provide warm candidate referrals or intros
• Generates contextual introduction requests designed to help users initiate outreach without awkward cold messaging.

Who it's for

• Active & Passive Job Seekers
• Tech & Professional Industry Career Changers
• Recent University Graduates & Early Career Professionals
• Freelancers Seeking Internal Company Champions

Why it works

• Second-degree social graph mapping uncovers hidden intro paths that standard direct connections miss
• Multi-platform integration aggregates fragmented email and social media contacts into one unified graph
• Job URL parsing instantly extracts hiring company metadata without requiring manual data entry
• Powered by underlying Y Combinator (W24) relationship technology from Happenstance AI.

Founder story

Sidedoor was created by Jerry Feng in 2026, powered by relationship intelligence infrastructure from Happenstance AI (YC W24). Observing that job applicants were grinding through hundreds of cold applications while often sitting just one or two connections away from someone who could refer them, Feng built Sidedoor to map extended social graphs across platforms and make those hidden referral paths immediately visible.

Alternatives

• Draftboard
• LinkedIn Sales Navigator
• Intch
• Boomerang AI

Comparison overview

• Sidedoor maps second-degree connections across personal social and email accounts to surface job referrals, whereas standard job boards focus exclusively on cold direct resume submissions.
• Sidedoor utilizes cross-platform contact graphing from Gmail, Twitter, and LinkedIn, while LinkedIn native search restricts connection discovery strictly to its own platform data.