Step 1: Define What You Actually Need
Before evaluating agencies, get specific about what you’re hiring for. “Help us grow” is not a brief. Agencies respond to vague briefs with vague proposals — and you can’t evaluate what you can’t compare.
Questions to Answer Before You Start
What platform(s) are you on? Amazon, Shopify, WooCommerce, Walmart, or multiple? The answer narrows your agency search significantly. A great Amazon agency may have no Shopify capability, and vice versa.
What services do you need? Listing optimization? PPC management? Store design? Email marketing? SEO? Full-stack management? Be specific. An agency that’s excellent at Amazon PPC may be mediocre at Shopify development.
What’s your budget? E-commerce agency retainers typically range from $2,000 to $25,000+ per month depending on scope and agency tier. Knowing your budget upfront prevents wasting time with agencies above or below your range.
What does success look like? “Increase revenue” is too vague. “Grow Amazon revenue from $30K to $60K per month within 6 months while maintaining 25% ACoS or lower” is a brief an agency can actually plan against.
What have you tried before? If you’ve worked with an agency previously, document what worked, what didn’t, and why the engagement ended. This context helps your next agency avoid repeating mistakes.
Step 2: The Evaluation Framework
We recommend evaluating every agency across seven dimensions. No agency will score perfectly on all seven — the point is to identify which dimensions matter most for YOUR situation and weight accordingly.
Dimension 1: Specialization vs. Generalization
What to look for: Does the agency specialize in your platform and service area, or do they claim to do everything?
An agency that specializes in Amazon marketplace management and has managed 100+ Amazon accounts will outperform a generalist digital agency that “also does Amazon” as one of 20 services. Depth of experience in your specific problem is the single best predictor of results.
Questions to ask:
- “What percentage of your revenue comes from [Amazon/Shopify/PPC] specifically?”
- “How many clients do you currently manage on [platform]?”
- “What’s the most complex problem you’ve solved on [platform] in the last 6 months?”
If they can’t answer these specifically, they’re probably not specialists.
Dimension 2: Proven Results with Data
What to look for: Case studies with real numbers — before/after revenue, ACoS, conversion rate, timeline, and specific tactics used.
Every agency claims they “drive growth.” The ones worth hiring can show you exactly how much growth they’ve driven, for whom, in what timeframe, and using what approach.
Questions to ask:
- “Can you share 3 case studies in my product category or a similar one?”
- “Can I speak with a current client in a similar situation to mine?”
- “What’s your average client revenue improvement in the first 90 days?”
Red flag: Agencies that show percentage improvements without absolute numbers (“287% growth!”) may be cherry-picking small accounts where small absolute changes produce large percentage gains. Ask for the actual dollar figures.
Dimension 3: Team Structure
What to look for: Who will actually work on your account? A named individual or a shared resource pool?
Many agencies sell you on the founder’s expertise in the pitch, then hand your account to a junior coordinator managing 20+ other clients. The person who manages your account day-to-day matters more than the person who pitched you.
Questions to ask:
- “Who specifically will manage my account? Can I meet them?”
- “How many other accounts does that person manage?”
- “What happens if my account manager leaves?”
- “Do you use in-house staff, freelancers, or offshore teams?”
Benchmark: An account manager handling more than 8-10 accounts is spread thin. The best results come from dedicated or semi-dedicated team structures where your account gets focused attention.
Dimension 4: Technology and Tools
What to look for: Does the agency use proprietary tools, standard industry tools, or just Excel spreadsheets?
The best agencies have invested in technology that amplifies their team’s effectiveness — custom dashboards, AI-powered optimization tools, automated reporting, competitive intelligence platforms. This doesn’t mean they need to have built a $2M proprietary platform — but they should use tools beyond basic Excel and manual processes.
Questions to ask:
- “What tools do you use for [keyword research/bid optimization/reporting/competitor analysis]?”
- “Will I have access to a real-time dashboard, or do I wait for monthly reports?”
- “How do you use AI in your operations?”
Dimension 5: Communication and Reporting
What to look for: How often will you hear from the agency, in what format, and with what level of detail?
Communication breakdowns kill agency relationships. The expectations should be crystal clear before signing.
Questions to ask:
- “How often are reports delivered? Weekly? Bi-weekly? Monthly?”
- “What metrics are included in reports?”
- “How do I reach my team for urgent questions — email, Slack, phone?”
- “What’s your typical response time for non-urgent requests?”
Benchmark: Weekly reporting should be the minimum for any retainer above $3,000/month. Real-time dashboards are increasingly standard. Response time should be under 24 hours for routine requests, under 4 hours for urgent issues.
Dimension 6: Contract Terms and Pricing
What to look for: Month-to-month contracts, transparent pricing, and clear scope definitions.
Agency contracts vary wildly. Some offer month-to-month flexibility. Others lock you into 12-month agreements with expensive early termination clauses. Neither is inherently wrong — but you need to understand what you’re signing.
Questions to ask:
- “What’s the minimum contract term?”
- “What’s the notice period for cancellation?”
- “Are there early termination fees? How much?”
- “Is the pricing fixed or does it scale with my ad spend/revenue?”
- “What’s included vs. what costs extra?”
Red flag: An agency that requires a 12-month contract but won’t guarantee any specific performance metrics is asking you to bear all the risk. If they’re confident in their ability to deliver, shorter contracts or performance-based terms should be on the table.
Dimension 7: Cultural Fit and Values
What to look for: Do they listen more than they talk? Do they ask about your business goals before pitching their services? Do they say “I don’t know” when they don’t know?
The best agency-client relationships feel like partnerships, not vendor transactions. The agency should be genuinely curious about your business, honest about what they can and can’t do, and transparent about challenges and setbacks.
Questions to ask:
- “What type of client is NOT a good fit for your agency?”
- “Can you tell me about a time an engagement didn’t work out? What happened?”
- “How do you handle it when results are below expectations?”
An agency that can’t name their ideal client profile or admit to any past failures is not being honest with you.
Step 3: Understand Pricing Models
Flat Monthly Retainer
How it works: You pay a fixed monthly fee for a defined scope of work.
Range: $2,000 – $25,000+/month depending on scope, agency tier, and geographic location.
Pros: Predictable costs, clear scope, easy to budget.
Cons: Doesn’t directly tie agency compensation to results.
Best for: Ongoing management (Amazon PPC, Shopify maintenance, email marketing).
Percentage of Ad Spend
How it works: Agency charges a percentage (typically 10-20%) of your monthly advertising budget.
Pros: Scales with your investment.
Cons: Creates a perverse incentive — the agency makes more money by recommending you spend more, whether or not that’s the right strategy. An agency managing $100K/month in ad spend at 15% earns $15K/month regardless of how efficiently that $100K is spent.
Best for: Large-budget advertisers where the percentage fee justifies dedicated attention.
Performance-Based / Revenue Share
How it works: Agency takes a percentage of the revenue they help generate.
Range: 5-25% of marketplace revenue or ad-attributed revenue.
Pros: Perfect incentive alignment — agency earns more only when you earn more.
Cons: Attribution disputes (which revenue is “agency-generated” vs. organic?). Can become expensive at scale.
Best for: Amazon marketplace management, especially for brands starting from low baseline revenue.
Project-Based
How it works: Fixed price for a defined deliverable (website build, audit, strategy document).
Range: $1,500 – $50,000+ depending on scope.
Pros: Clear deliverable, finite commitment, no ongoing obligation.
Cons: No ongoing optimization or management after delivery.
Best for: Website builds, migrations, audits, one-time optimizations.
Hybrid Models
Many agencies combine models — a base retainer plus performance bonuses, or a lower retainer plus a small percentage of revenue growth. These can create good incentive alignment if the terms are clear.
Step 4: The Red Flags
These are the warning signs we’ve seen repeatedly across hundreds of agency-client relationships:
“We guarantee page 1 rankings.” No agency can guarantee Amazon or Google rankings. The algorithms are controlled by Amazon and Google, not by the agency. An agency that guarantees specific rankings is either lying or doesn’t understand how search works.
No case studies with real numbers. If an agency has been operating for 2+ years and can’t show you specific, detailed case studies with real client names (or at minimum, real metrics with anonymized brands), question what they’ve actually achieved.
Lock-in contracts with no performance guarantee. A 12-month contract is acceptable if it includes performance milestones with exit clauses. A 12-month contract with NO performance guarantees and a steep termination fee is a one-sided deal.
Your point of contact is a salesperson, not a practitioner. If the person pitching you can’t answer technical questions about PPC strategy, listing optimization, or platform specifics, they’re a salesperson. The person who sells you should be able to DO the work — or at minimum, connect you directly with the person who will.
Vague reporting. If an agency’s sample report contains charts with unlabeled axes, metrics without context, or “revenue growth” without specifying whether it’s ad revenue, organic revenue, or total revenue — they’re hiding behind ambiguity.
No interest in your business goals. An agency that jumps straight to “here’s what we do” without first asking “what are you trying to achieve?” is selling a service, not solving a problem.
They badmouth every competitor. Healthy competition means respecting other players in the market. An agency that spends the pitch trashing competitors instead of demonstrating their own value is insecure about their differentiation.
Step 5: The Questions to Ask in the Final Pitch
Once you’ve narrowed to 2-3 agencies, ask these during the final evaluation:
- “Walk me through exactly what happens in the first 30 days after we sign.”
- “What KPIs will you track, and what are you targeting for each by Month 3?”
- “What’s the worst-case scenario if things don’t go as planned? How would you handle it?”
- “Can I get a 30-minute call with a current client who’s been with you for 6+ months?”
- “What do you need from me to be successful? How much of my time will this require?”
- “If I cancel after 3 months, what do I keep? Campaign data? Content? Creative assets?”
- “How do you handle scope creep — if I need something outside the original agreement?”
- “What’s your team’s average tenure? How long has the person who’d manage my account been with you?”
The answers reveal more than any pitch deck. Listen for specificity, honesty, and genuine interest in your success.
How GigaCommerce Approaches This
In the interest of transparency, here’s how we stack up against the framework above:
Specialization: E-commerce only — Amazon management, Shopify development, performance marketing. We don’t do SaaS marketing, local SEO, or social media management.
Results: We’re building our case study library (we’re transparent about being a growing agency). We publish real metrics when available and are honest about our trajectory.
Team: Dedicated team pods — a named account manager, PPC specialist, and content creator per client. Our pods manage 4-8 clients maximum.
Technology: AI-native operations — AI-powered bid optimization, content generation, competitor monitoring, and automated reporting.
Communication: Weekly reporting for Growth and Scale plans. Real-time dashboards. Slack, email, and scheduled calls.
Contracts: Month-to-month. 30 days notice. No termination fees. Full asset transfer on departure.
Pricing: Flat retainer starting at $2,000/month. No percentage of ad spend. Full pricing →
We’re not the right fit for everyone. If you need an agency with 10 years of track record and Fortune 500 case studies, that’s not us — yet. If you want AI-native operations, dedicated teams, transparent pricing, and no lock-in contracts at a fraction of typical US agency pricing, we’re worth a conversation →.
Frequently Asked Questions
How much should I expect to pay for an e-commerce agency?
Amazon management: $2,000-$15,000/month. Shopify development: $5,000-$30,000+ for a build, $2,000-$8,000/month for ongoing. Performance marketing: $2,000-$15,000/month for management (ad spend separate). Full-stack management: $8,000-$25,000+/month. These ranges vary significantly by agency tier and geography. For a detailed pricing breakdown, see our article: Amazon Agency Pricing: What to Expect →
Should I hire a specialist agency or a full-service agency?
Start with a specialist if your primary need is a single platform (Amazon OR Shopify). Once that platform is performing well, expand to full-service or add a second specialist. The worst outcome is a generalist agency that’s mediocre at everything.
How long should I give an agency before evaluating results?
Minimum 90 days. The first 30 days are onboarding and data collection. Days 30-60 involve initial optimization and testing. Meaningful results typically emerge between Days 60-90. Evaluating before 90 days doesn’t give the agency enough time to implement and measure — but you should see clear progress indicators (campaign restructuring, listing improvements, reporting cadence) well before Day 90.
What if I’ve had a bad experience with an agency before?
Use it as data. Document specifically what went wrong: poor communication? Lack of results? Overpromising? Hidden fees? Then build your evaluation criteria around those failure points. The questions in this guide are designed to surface the issues before you sign, not after.
Can I manage e-commerce myself instead of hiring an agency?
If you have the time (15-25 hours/week for Amazon management alone), the expertise, and the tools. Most brand founders find that their time is more valuable spent on product development, sourcing, and strategy — while specialists handle the daily execution. The question isn’t “can I?” but “should I?” — and the answer depends on your opportunity cost.
Next Steps
Ready to evaluate agencies? Start with a free audit from us. We’ll analyze your Amazon, Shopify, or advertising setup and provide actionable recommendations — whether you hire us or not. Get your free audit →
Keep reading:
- Amazon Agency Pricing: What to Expect in 2026 →
- In-House vs Agency for Amazon: Data-Driven Comparison →
- Red Flags When Hiring an Amazon Agency →
Last Updated: March 2026