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How do I write a proposal mail for work partnership or become a vendor?

Subject line: Partnership proposal — [Your Company] + [Their Company]

Keep it short, specific and action-focused. Use this structure:

  • Opening (1 sentence): who you are and why you’re writing.
  • Value (2–3 sentences): the specific problem you solve for them, and a quantified benefit (revenue, cost, time saved).
  • Proof (1 sentence): 1–2 quick examples or metrics + a client name if allowed.
  • Ask (1 sentence): propose a clear next step (15–20 minute call, demo, send contract) and a timeframe.
  • Close: say you’ll follow up and include contact info.

Sample email: Hi [Name], I’m [Your Name], [role] at [Company]. We help [their customer type] reduce [pain] by [one-line solution], typically improving [metric] by [X%]. We did this for [Client] and saw [result]. I’d like to discuss a vendor/partnership model that could deliver similar results for [Their Company]. Are you available for a 15-minute call next week (Tue/Thu morning)? I’ve attached a one-page overview and case study. Thanks, [Name] | [Phone] | [LinkedIn]

Checklist before sending: personalize subject, attach one-pager, keep under 150 words, follow up in 3–5 business days.

Which industry and company size are you targeting?

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