The reality
Most recruiters don't read cover letters. Greenhouse's own data shows cover letters are opened <20% of the time on tech roles. On mass-market corporate roles, it's lower.
Skip it when
- The application says "optional."
- You're applying through a job board (LinkedIn Easy Apply, Indeed, ZipRecruiter).
- You're at volume — 20+ apps a week. Your time is better spent on 5 more tailored resumes.
Write one when
- You have a specific referral or connection at the company. Name-drop in the first sentence.
- You're changing industries or functions. The resume can't tell that story. The letter can.
- The role is at a small company (<100 people) where the hiring manager is likely reading everything.
- The application explicitly asks for one AND asks a specific question ("Why this company?"). Answer the question, not a generic pitch.
- You're applying to a founder-led role. Founders read letters.
The 4-paragraph format that works
- Why this specific company (2 sentences, specific — not "your mission resonates").
- The single most relevant thing you've done. One story. Numbers.
- What you'd do in the first 90 days. Concrete.
- Ask for the conversation. Sign off.
Under 250 words. Every time.
