About Seller Sage
Built by operators. Run like one.
We’re an Amazon agency built for founders who are tired of lock-in contracts, rotating account managers, and cookie-cutter execution. Growth-stage brands deserve better.
Operating on Amazon since 2016 · $100M+ in tracked sales
Our Mission
Make Amazon work the way an operator would run it.
Named US Strategy Lead on every account. Transparent monthly retainer with no lock-in. A scoreboard tied to TACoS and contribution margin, not vanity percentages. Tactics that survive in our own P&L before they get recommended to yours.
Our Vision
A Seller Central where founder-led brands aren’t the junior AM’s 15th account.
Where $500K to $20M brands get operator-grade execution from someone who stays. Where the named Strategy Lead in your contract still owns your account in year three. Where capping account load isn’t a constraint, it’s the whole point.
Our Story
We built the agency we wished we had.
Years of running Amazon P&Ls (doing PPC at midnight, refreshing listings between meetings, fighting with agencies who optimized for their own bonus structure instead of ours) left us with strong opinions about how an Amazon agency should operate.
When we started talking to other founders in the $500K–$20M range, the pattern was the same everywhere: enterprise agencies wouldn’t take them, low-cost shops burned them with ticket-based execution, and mid-market shops treated them as the junior AM’s 15th account. There was no agency built specifically for their stage.
So we built one. Transparent pricing. Month-to-month terms. A named US Strategy Lead who stays. TACoS and margin as the scoreboard. Every decision at Seller Sage comes back to the same question: would we want this done to our own business?
Founder
Kyle Hamar, Founder & Strategy Lead
Kyle has been selling on Amazon since 2016. He still builds and operates multiple Amazon brands of his own, which means the playbook Seller Sage runs is what’s working in his own accounts this week, not theory pulled from a deck.
Alongside his own brands, he has consulted with sellers spanning early-stage startups to multi-billion-dollar global brands, with more than $100 million in tracked Amazon sales across the work.
Kyle leads strategy on every Seller Sage engagement, capped at seven brands at a time so the relationship stays close. He works from Redmond, WA.
Recent Results
What that looks like in dollars.
Three engagements, anonymized for client privacy. Numbers pulled directly from Seller Central.
Industrial & Scientific
$1.4M to $2.9M
+107% annual revenue growth over 36 months, with TACoS held at 10% across the full engagement.
36 months active. Still a retainer.
Sports & Outdoors Recovery
$788K to $1.36M
$572,785 in incremental revenue across the same 6 months year-over-year. 72.7% growth.
6 months active. Inventory plus PPC rebuild.
Outdoor Sports
$6K to $32K
Monthly net profit, +414% YoY, while ad spend dropped 17.7%. Margin expanded from 4.1% to 18.7%.
8 months active. Profit-first turnaround.
How We Operate
The principles we actually run the business by.
Profit over optics
ROAS is part of the picture, but it doesn’t pay rent. We optimize for TACoS, contribution margin, and net-after-ad-spend profit, the metrics that tell you if your business is actually growing.
Earn it every month
No lock-in contracts. No termination fees. You stay with us because we’re delivering, not because switching is painful. Month-to-month, forever.
A Strategy Lead who stays
Every account gets a named US Strategy Lead capped at ≤7 brands. If they leave within 24 months, we refund 3 months of fees. Brand Managers handle execution under the Strategy Lead and are capped at 4 brands each.
Founder-to-founder tone
We speak plainly. If your product is the problem, we’ll tell you. If your pricing is hurting margin, we’ll say so. You came for an operator, not a yes-person.
Published pricing
Our pricing is on the website. We don’t hide behind discovery calls. If we’re the right fit, you’ll know before you book a meeting.
Operator cadence, not theater
Monday ad spend reviews. Wednesday listing refreshes. Friday reports. Our weekly cadence is published and predictable, so you always know what’s happening.
Who We Serve
We’re honest about fit.
We don’t take every client that walks in. Here’s who we’re built for, and who we’ll politely point elsewhere.
✓ We’re built for
- Brands doing $500K–$20M on Amazon
- Founder-led or small-team operated
- $5K–$200K/month ad spend
- Brands coming off a bad agency experience
- DTC brands expanding to Amazon
✗ We’re not the right fit for
- Brands under $500K (full-service isn’t right yet)
- $200M+ enterprise accounts (Pattern/Tinuiti fit better)
- Aggregator portfolios needing 1P/vendor-only focus
- Supplements or beauty brands (crowded category, others serve better)
- Brands looking for cheapest PPC-only management
- Anyone uncomfortable with transparency as a default
Think we might be a fit?
Start with a free audit. We’ll look at your account and tell you, honestly, where the opportunities are and whether we’re the right team to run them.