Empowering sellers to sell everywhere

Our mission

Sparknautic exists to level the playing field for independent e-commerce sellers. We believe every seller — whether you're running a one-person vintage shop or managing thousands of SKUs across Amazon and eBay — deserves access to the same inventory management tools that enterprise retailers take for granted.

Our mission is simple: make multi-channel selling effortless. No spreadsheets. No overselling. No switching between seller dashboards. Just one place to manage your products, orders, and inventory across both marketplaces.

The problem we solve

Multi-channel sellers face a painful operational reality. Every new sales channel doubles the complexity: separate logins, separate inventory counts, separate order queues. Sell a product on eBay but forget to update Amazon? That's an oversell, a cancellation, a negative review, and a hit to your seller rating.

Most inventory management tools charge $100–300/month and are built for large operations with dedicated ops teams. Independent sellers — the ones who need help the most — are stuck with spreadsheets, browser tabs, and anxiety.

Sparknautic fixes this with:

• Real-time inventory sync — stock updates across both channels every 5 minutes, automatically.
• Unified order management — every order from every channel in one view.
• One-click multi-channel listing — push to Amazon and eBay from a single catalog.
• Affordable pricing — starting at $0/month, scaling to $79/month for serious sellers.

Our values

Sellers first

Every feature we build starts with a seller's real workflow. We don't add complexity for its own sake. If it doesn't save time or prevent mistakes, it doesn't ship.

Reliability over everything

Inventory sync is mission-critical. A missed sync means overselling, cancellations, and damaged seller ratings. We engineer for high availability and automatic recovery from API failures.

Transparent pricing

No hidden fees, no per-transaction charges, no contracts. You know exactly what you're paying, and you can upgrade, downgrade, or cancel anytime. The free tier is genuinely free — not a bait-and-switch.

Built for growth

Start with one channel and 25 products. Scale to unlimited products without changing your workflow. Sparknautic grows with your business.

Who Sparknautic is for

• Side-hustle sellers expanding from one marketplace to two.
• Small business owners managing 100–5,000 SKUs across both channels.
• eBay sellers who want to expand to Amazon, or vice versa.
• Amazon FBA sellers diversifying to avoid single-platform dependency.
• Resellers and dropshippers who need real-time stock visibility across channels.

The technology

Sparknautic uses direct API integrations with each marketplace — no middleware, no third-party connectors that add latency or points of failure.

• eBay — Sell Inventory API (inventory items, offers, groups) and the Browse API for category data.
• Amazon — Selling Partner API (SP-API) with Login with Amazon for OAuth.

Background jobs run continuously to sync inventory, import orders, refresh tokens, and monitor stock levels — so you don't have to.

Made in the USA

Sparknautic is built and operated by Apex and Studio, LLC in the United States. Our infrastructure runs on US-based servers with enterprise-grade security.

Get in touch

Questions, feedback, or partnership inquiries: fill out our contact form and we'll reply within one business day. Hit a technical issue? Open a support request instead.