What Makes a Studio Different From an Agency
A product studio brings product thinking, design, and engineering together under one roof, with shared accountability for the outcome. An agency builds what you spec. A studio helps you figure out what to spec and then builds it.
This is not a semantic distinction. It changes the relationship. If you hire an agency and the product fails in market, the agency built what you asked for and has no further obligation. If you hire a genuine product studio, they should be invested in the product working, not just the code being deployed.
What to Look For
Shipped products (not just client work)
The best studios have built products of their own. This gives them visceral context on what it's like to be on the other side of the relationship: dealing with users, making prioritisation calls under constraint, watching real analytics data. Agencies that only do client work often lack this perspective.
Ask: "What products has your team built and shipped that aren't client projects?"
Fixed-price capability
A studio that can quote a fixed price for a defined scope has a process. A studio that only quotes time-and-materials is externalising risk onto you. Fixed-price work requires clear scoping, which requires process. Both are indicators of operational maturity.
Ask: "Can you give me a fixed-price quote for this scope?"
A defined brief process
Before any work starts, how does the studio capture requirements, resolve ambiguity, and lock scope? A good studio has an answer to this. A mediocre one will say "we'll figure it out as we go."
Ask: "Walk me through how you scope a new project from initial call to brief sign-off."
References from similar-stage clients
A studio that mostly works with enterprise clients is not necessarily equipped for startup constraints (speed, limited budget, pivot risk). Ask for references from founders who were at a similar stage to you.
Ask: "Can you connect me with a founder client at a similar stage to mine?"
Honest about what they can't do
The best studios are clear about their limitations. Studios that can "do everything" typically do nothing particularly well. A design-forward studio that subcontracts engineering or vice versa has coordination overhead and quality variance. Ask them directly about their weaknesses.
Red Flags
- No fixed-price option. If every quote is time-and-materials, they either can't scope or don't want the discipline of it.
- Portfolio is all wireframes. Any studio can make things look nice in Figma. What shipped? What lives in production?
- Vague team composition. Who specifically is doing the work? If you can't get names and LinkedIn profiles, you're buying unknown capacity.
- Testimonials but no references. Curated testimonials are marketing. Real references who will take a call are a different thing.
- Scope creep in the first meeting. If the studio is already expanding scope before they've understood your brief, that's how they'll behave during the engagement.
Contract Essentials
- IP assignment clause (all work product is owned by you, full stop)
- Defined deliverables and acceptance criteria
- Change request process in writing
- Clear payment schedule tied to milestones, not calendar dates
- Source code ownership and access (you get the repository)
- Post-launch support scope (how long, what's covered)
FAQ
Q: How much should a product studio cost?
Cost depends on the engagement and the outcome you need. Kastling scopes each engagement and quotes after a call, starting from a paid AI Readiness Audit that maps the work before anyone commits to a build. Across the industry, a full MVP typically costs $15,000 to $60,000 depending on scope and team composition.
Q: Should I sign an NDA before sharing my idea?
Reputable studios will sign NDAs. However, an NDA is not a substitute for evaluating the studio's integrity through references and conversation.
Q: How long does a studio engagement typically take?
Sprint engagements run 2–8 weeks. Longer build projects can run 3–5 months. Avoid open-ended engagements with no defined endpoint.
Q: What if I'm not happy with the work?
Your contract should include a revision process and acceptance criteria. If a studio ships work that doesn't meet agreed criteria, you have grounds for a revision round at no additional cost.