PRD vs BRD vs MRD — What's the Difference?
Three acronyms, three different documents, three different audiences. Here's when you need each one — and why most developers should stop at the PRD.
Quick comparison
| Document | Audience | Focus | Length |
|---|---|---|---|
| PRD | Developers, designers | What to build, features, acceptance criteria | 1-3 pages |
| BRD | Executives, stakeholders | Business goals, ROI, market opportunity | 5-20 pages |
| MRD | Marketing, sales, product | Market need, competitive landscape, positioning | 5-15 pages |
PRD — Product Requirements Document
A PRD answers: “What are we building and how do we know when it's done?” It is the most actionable of the three — it goes directly from document to code.
A PRD includes: problem statement, target user, user flow, feature list with priorities and acceptance criteria, out-of-scope items, build order, and success metrics. The best PRDs also include file structure and database schema.
When you need it: Every time you build something. Whether it's a weekend project, a startup MVP, or a new feature for an existing product — a PRD is always worth the 15 seconds it takes to generate one.
BRD — Business Requirements Document
A BRD answers: “Why should the business invest in this?” It focuses on business goals, market opportunity, ROI projections, and strategic alignment. It rarely mentions specific features or technical implementation.
When you need it: When you're pitching to executives, seeking funding, or justifying a project to non-technical stakeholders. Solo developers and indie hackers almost never need a BRD — you are the stakeholder.
MRD — Market Requirements Document
An MRD answers: “What does the market need and where do we fit?” It covers market size, competitive analysis, buyer personas, pricing strategy, and positioning. It informs the PRD but doesn't replace it.
When you need it: When you're entering a competitive market and need to justify your positioning. Useful for funded startups with marketing teams. Overkill for most indie projects.
Which one should you write?
If you're a developer building something — start and stop with the PRD. Here's the decision tree:
- Solo developer or indie hacker? PRD only. You don't need business justification for your own time.
- Small team (2-5 people)? PRD only. Align on features, not business strategy.
- Startup seeking funding? MRD for the pitch deck, PRD for the engineering team.
- Enterprise team? BRD for executive approval, MRD for market context, PRD for implementation.
Keep reading
What Is a PRD? The Complete Guide for Developers
Everything you need to know about product requirements documents.
How to Write a PRD in 2026 (With Template)
A step-by-step guide with a free template for writing an effective PRD.
5 PRD Templates for Solo Developers
Templates designed for one-person teams who need to move fast.