How to Work With a Development Agency
Working with a development agency can be one of the best decisions you make for your startup. Or it can be a nightmare that burns through your budget and delays your launch by months.
The difference usually comes down to how you work together. After years on both sides of this relationship, here's what actually makes agency partnerships work.
Why Use an Agency in the First Place?
Before we get into the how, let's talk about the when. Agencies make sense when:
- You need to move fast. An agency has a team ready to go. Hiring takes months.
- You need expertise you don't have. Maybe it's mobile development, or a specific tech stack, or just experienced developers.
- You have a defined project. Agencies excel at building something specific, less so at open-ended R&D.
- You're non-technical. An agency can be your entire technical team while you focus on business.
If you're still figuring out what to build, or if you need someone to deeply understand your business over years, a full-time hire might make more sense.
Choosing the Right Agency
Not all agencies are equal. Here's how to find a good fit:
Look at Their Portfolio
Have they built products similar to yours? Not just in industry, but in complexity and scale. An agency that builds marketing sites might struggle with a complex web app.
Check References
Ask for references and actually call them. Ask about communication, hitting deadlines, handling problems, and whether they'd work with the agency again.
Understand Their Process
How do they work? Agile sprints? Waterfall? How often will you get updates? How do they handle change requests? The answers matter more than you think.
Talk to Who'll Actually Work on Your Project
Sales people are great at selling. But you're not working with sales. Ask to meet the project manager and developers who'll actually build your product.
Start Small If Possible
If you can, start with a small project before committing to a big one. A two-week discovery phase or a limited prototype tells you a lot about how the relationship will work.
Setting the Project Up for Success
The work you do before development starts determines how smoothly everything goes.
Document Your Requirements
The more clearly you can describe what you want, the better the result. You don't need a 100-page spec, but you should have:
- Clear problem statement and goals
- User stories or use cases
- Wireframes or mockups (even rough ones)
- Technical constraints or preferences
- Definition of done for each major feature
"Make it like Instagram but for dogs" isn't a requirement. "Users can upload photos, add filters, and share to a feed sorted by recency" is.
Agree on Scope and Budget
Fixed-price contracts only work if scope is truly fixed. If you expect changes (and you should), time-and-materials often makes more sense.
Either way, be clear about what's included and what costs extra. Change requests should follow a defined process.
Set Communication Expectations
Agree upfront on:
- Who your main point of contact is
- How often you'll have check-ins (daily? weekly?)
- What tools you'll use (Slack, email, project management software)
- Response time expectations
- How decisions get made
Ambiguity here causes most client-agency friction.
During the Project
Stay Involved
The biggest mistake clients make is handing off requirements and disappearing until launch. That's how you end up with a product you don't recognize.
Stay involved. Attend check-ins. Review work in progress. Give feedback early and often.
Make Decisions Quickly
When the agency asks a question, answer it fast. Delays in decisions cause delays in delivery. If you can't decide something immediately, tell them when you will.
Trust Their Expertise
You hired them because they know things you don't. When they push back on a feature or suggest a different approach, listen. They might be wrong, but they might save you from a mistake.
Document Everything
Keep written records of decisions, change requests, and agreements. Memory is unreliable. When there's a dispute three months later, emails and meeting notes settle it.
Manage Scope Creep
As you see the product take shape, you'll want to add things. That's natural. But every addition costs time and money.
Keep a "nice to have" list for future iterations. Focus v1 on what you originally agreed to. Add features after you've shipped, not during development.
Handling Problems
Things will go wrong. Here's how to handle it:
Address Issues Early
If something feels off, don't wait for it to become a crisis. A five-minute conversation about a concern is easier than a two-hour meeting about a disaster.
Assume Good Faith
Most problems aren't malicious. They're miscommunications or honest mistakes. Approach issues as problems to solve together, not blame to assign.
Escalate When Needed
If you can't resolve an issue with your day-to-day contact, escalate. Good agencies want to fix problems, and leadership can often unblock things faster.
Have an Exit Plan
Before you start, make sure you'll own the code and have documentation. If the relationship fails, you need to be able to continue with someone else.
Getting the Most Value
Beyond just completing the project, here's how to maximize what you get:
- Ask questions. Understand why they made certain technical choices. You'll need this knowledge later.
- Request documentation. Code without documentation is a liability. Make sure you can maintain what they build.
- Get training. If they're building something you'll manage, ask them to train your team.
- Plan the handoff. Who'll maintain this after the project ends? Make sure knowledge transfers properly.
Red Flags to Watch For
Some warning signs that a project is going sideways:
- Consistently missing deadlines without clear explanations
- Defensive reactions to questions or feedback
- Difficulty getting straight answers on progress or problems
- High turnover on your project team
- Scope expanding without corresponding budget discussions
- Work quality declining over time
If you see these, address them immediately. Don't wait and hope things improve.
The Relationship Mindset
The best agency relationships aren't vendor-client. They're partnerships.
When you treat an agency as a true partner, share context about your business, value their input, and invest in the relationship, you get better work. People do their best work for clients they like and respect.
Find an agency you trust, set the project up well, stay engaged throughout, and handle problems with maturity. Do that, and agency partnerships can be a huge accelerant for your business.