Has your business outgrown manual growth?
One partner for TikTok Shop, Shopify, Amazon, and everything behind the scenes — strategy, systems, and hands-on execution under one roof.
Enterprise Amazon Seller Services.
Designed to align with Amazon SP-API and Data Protection Policy requirements where applicable.
Where API integrations are used, they follow authorized Amazon SP-API access and applicable Data Protection Policy requirements. Seller Central operations are performed through seller-authorized permissions.
Seller Central & Account Health
Proactive catalog monitoring, variation restructuring, listing suppressions resolution, and strict account health defense.
Algorithmic PPC & DSP Management
Contribution-margin-focused bid engineering, automated negative harvesting, and Sponsored Brand/Video full-funnel architectures.
A+ Content & Brand Store Architecture
Premium brand narrative design, mobile-first comparison charts, and white-background main assets built strictly to style guides.
FBA Inventory & Demand Forecasting
Buffer modeling, reorder point automation, seasonal velocity planning, and multi-warehouse allocation systems.
Amazon Trademark & Compliance Notice: Amazon, Seller Central, and all related logos and brand marks are trademarks of Amazon.com, Inc. or its affiliates. Sellivio is an independent marketplace systems and operations firm and is not endorsed by, sponsored by, or directly affiliated with Amazon.com, Inc. Where API integrations are used, they follow authorized Amazon SP-API access and applicable Data Protection Policy requirements. Seller Central operations are performed through seller-authorized permissions.
One Team.
Every Channel.
Real Accountability.
We operate as your dedicated growth and operations engine across Amazon, TikTok Shop, Shopify, and beyond — uniting deliberate focus with measurable outcomes.
Personal Attention
We work with a limited number of clients, on purpose.
End-to-End Support
We handle the details so you can run your business.
Data-Driven Strategy
Decisions backed by numbers, not guesses.
Long-Term Systems
Built for growth that lasts, not a one-time spike.
Everything you need to grow.
Nothing you don't.
Eight core growth pillars — see them all, or start with what's below.
Amazon Foundation
Precision inventory management, algorithmic advertising, and high-conversion catalog assets engineered for sustainable marketplace growth.
AI, Systems & Intelligence
Custom mathematical models, automated keyword extraction engines, and unified contribution-margin dashboards built directly on your business data.
DTC & Emerging Channels
Multi-platform channel diversification engineered for viral commerce, creator affiliate engagement, and high-velocity sales on TikTok Shop and Walmart.
International Expansion
Systematic geographic scaling across Europe, the UK, Canada, and Asia-Pacific with international logistics architecture, localized catalog assets, and VAT management.
Web & Mobile App Development
Modern headless storefronts, custom analytics dashboards, and mobile companion apps built for speed, conversion, and long-term operational scalability.
AI & Systems Automation
Private AI agents, automated operational pipelines, and RPA workflows designed to replace manual overhead with deterministic, always-on execution.
Social Media Management
High-conversion organic content production, paid media synchronization, and creator network management focused entirely on commerce-driven outcomes.
Email, SMS & Retention
Predictive replenishment triggers, behavioral segmentation, and dynamic lifecycle flows designed to maximize LTV and reduce churn across every channel.
Operators,
not consultants.
Systems,
not spreadsheets.
Most agencies are built around billable hours and junior coordinators. Sellivio is engineered by former multi-channel founders who treat eCommerce as a technical discipline.
Operator-Led Execution
We do not hand you strategy slides and walk away. Former multi-channel brand founders build the infrastructure, manage the catalog, and execute daily alongside your team.
Deterministic Systems
Manual spreadsheets are failure points. We deploy custom Python scripts, automated replenishment models, and private RPA workflows to eliminate human errors.
Profit-Focused Growth
Top-line ROAS is meaningless if net cash flow is negative. Every ad dollar and catalog decision is measured against real post-COGS contribution margin.
Selective Partnership
We intentionally limit our active brand roster to guarantee dedicated senior bandwidth, rapid execution velocity, and deep operational alignment.
Real scale.
Engineered results.
We do not sell theoretical strategy. Here is what happens when deterministic systems, automated workflows, and operator-level discipline are applied to established brand portfolios.
The Challenge
High-velocity catalog experiencing recurring inventory demotions, Seller Support case backlogs, and margin leakage from unmonitored listing suppressions.
System Solution Built
Implemented daily Seller Central operational cadence, restructured parent-child variation listings, and deployed 90-day predictive FBA inventory lead-time synchronization.
The Challenge
Aggressive seasonal demand spikes causing stockouts and price-erosion battles with unauthorized reseller listings.
System Solution Built
Instituted Brand Registry enforcement protocols, optimized core listing copy and backend search terms, and coordinated buffer stock staging.
The Challenge
Conversion rate stagnation due to outdated product gallery imagery and inefficient automatic ad campaigns cannibalizing organic rank.
System Solution Built
Designed high-resolution 7-image gallery story arcs, rolled out Premium A+ Content modules, and segmented sponsored campaigns by search intent.
Built for brands
ready to scale.
Selective by design.
We deliberately limit our client roster to a small group of partners. This allows our senior operators to stay deeply involved in your day-to-day execution with dedicated care and attention.
Who We Work With
Established brands positioned for sustainable, high-velocity growth.
Established Momentum
Generating $1M+ in annual revenue across Amazon, marketplaces, or direct-to-consumer storefronts.
Strong Brand Equity
Proven product-market fit, enthusiastic customer reviews, and clear long-term brand identity.
Collaborative Mindset
Founders who value transparent partnership, strategic systems, and dedicated senior leadership.
Inventory & Capital Ready
Prepared to maintain healthy inventory reserves and invest sustainably in multi-channel expansion.
Multi-Channel Vision
Looking to expand thoughtfully across TikTok Shop, Walmart, Shopify, or international territories.
Who We Are Not For
Preserving focus, quality, and dedicated attention for our partners.
Early-Stage Dropshipping
Single-product arbitrage or dropshipping setups without proprietary brand equity or product quality.
Hourly Task Delegation
Companies looking for low-cost virtual assistants or transactional task-based outsourcing.
Data & Metric Opacity
Reluctance to share unit economics, true contribution margins, or supply-chain logistics.
Short-Term Quick Fixes
Seeking temporary growth hacks rather than building durable, compounding operational systems.
“Growth should not create chaos.
It should create leverage.”
When you build the right systems underneath an eCommerce brand, scaling ceases to be an exhausting firefighting drill. It becomes a repeatable, predictable engineering discipline.
Trusted by high-growth founders.
Validated by results.
Hear directly from eCommerce executives and brand founders who replaced fragmented agencies with Sellivio’s deterministic growth architecture.
“Sellivio replaced three disjointed agencies. In 14 months, our blended TACoS dropped from 22% to 12.8% while top-line marketplace revenue scaled past $7.4M. Their deterministic systems approach is unlike anything we’ve seen in eCommerce.”
“Most agencies give you junior account managers who read off standard dashboards. Sellivio embedded senior operators who built custom inventory forecasting bots and restructured our multi-channel catalog architecture from day one.”
“Our catalog had chronic stockouts and listing suppression issues. Sellivio solved supply chain sequencing and launched our Walmart and TikTok channels within 60 days. Our contribution margin improved by 34% in under six months.”
“The custom software and automated reimbursement scripts alone recovered over $85,000 in lost FBA inventory in our first quarter. They operate like a high-end engineering firm that happens to dominate eCommerce.”
Everything you need to know.
Clear answers from operators.
Straightforward answers to the most common questions regarding our partnership model, fee structures, multi-channel execution, and technology.
We partner with established eCommerce brands generating $1M to $30M+ in annual revenue that have proven product-market fit. Our partners want senior marketplace operators, dedicated full-stack execution, and custom automation infrastructure rather than junior agency account coordinators.
We operate on a transparent hybrid model combining a baseline monthly management retainer with a performance-aligned incentive tied to net GMV growth or margin expansion. This ensures our incentives remain perfectly aligned with your bottom-line profitability.
Yes. Managing all primary commerce channels under one unified operating system eliminates channel cannibalization, prevents inventory stockouts, and enables unified advertising attribution that siloed agencies cannot achieve.
In Month 1 (Diagnostic & Foundation Reset), we identify and plug immediate margin leaks, suppress wasted ad spend, and fix listing indexation. By Months 2 and 3, algorithmic rank compounding and multi-channel synchronization produce tangible improvements in blended TACoS and velocity.
Our selective partner model limits our client roster so that former eCommerce founders and senior marketplace operators personally direct and execute your account strategy. You will never be handed off to junior coordinators or outsourced contractors.
Ready to build
what's next?
We work with a Selected number of brands at a time. If your business is ready for systems-driven scale, submit your application to start the diagnostic conversation.