Built by a seller, for sellers
L-Guard was created out of frustration with existing Amazon tools. Most of them were built in 2018-2020 and haven't adapted to the new reality - Alexa for Shopping, COSMO Knowledge Graph, 2025-2026 fee structures, and automated compliance enforcement.
Founder-built. Built and maintained by an Amazon seller since 2017. Every tool started as a problem in a real Seller Central account.
The problem we solve
Amazon changed everything in 2024-2026. Inbound Placement fees appeared out of nowhere. LIVE and LTSF penalties created an impossible inventory balancing act. Alexa for Shopping replaced keyword-based search with semantic understanding. And 14% of seller accounts faced suspension in Q1 2026.
Yet most seller tools still operate like it's 2020. They track keywords that Alexa for Shopping ignores. They calculate profits without the new fee tiers. They can't tell you if your listing will get suppressed by Amazon's automated compliance system.
The story
It started in 2017 with a single product listing and a lot of spreadsheets. After 9+ years of selling on Amazon - surviving multiple fee overhauls, two account health scares, and the 2025 tariff shock that wiped out margins overnight - it became clear that the tools available weren't keeping up.
When the 2025-2026 fee changes hit and Alexa for Shopping fundamentally changed how Amazon discovers products, existing tools couldn't answer the most basic question: "Am I actually making money on this product?" So we built one that could. Then another. And another. Each tool in L-Guard exists because we needed it ourselves first.
What makes us different
Built for 2026 rules
Current listing limits, fees and account rules are built into the tools, and every rule change is logged with a date in the changelog.
Built for modern Amazon search
Alexa for Shopping readiness, COSMO Knowledge Graph optimization, suppression risk scanning.
Real seller experience
9+ years on the platform. We've dealt with suspensions, fee changes, and algorithm shifts firsthand.
Minimal cost
Free tools to start. No enterprise pricing games. Built lean for sellers, not investors.
Our mission
To give every Amazon seller - from beginners to agencies - the tools and intelligence that only large brands could previously afford. We believe that understanding your real margins, optimizing for modern search algorithms, and protecting your account health shouldn't require a $300/month subscription.
Our tools
Every tool solves a specific pain point that real sellers face every day:
Profit Calculator
Free. Takes the FBA fee from Amazon's 2026 rate card when you enter package dimensions, adds the 3.5% fuel surcharge, the holiday peak fee, referral price tiers and import duties, so you see the real margin.
Listing Studio
Listing audit for Alexa for Shopping, COSMO, keywords, the main image and suppression risk. Title, Item Highlights and Search Terms are counted against Amazon's limits.
ReviewShield
Checks one review against Amazon's Community Guidelines and drafts the removal requests for 5 channels. A free rule check marks risky words in your browser.
Account Shield
Plan of Action generator with a pre-submit check that runs in your browser, plus a suppression risk checker.
Fee Optimizer
FBA fee from Amazon's 2026 rate card, the nearest cut to a cheaper size tier or weight line, storage, and packaging ideas.
Cash Flow Calculator
Free. Your cash balance day by day for 180 days, with supplier payments and the DD+7 payout delay, and the lowest point with its date.
PPC Audit Tool
Upload your Search Term report (CSV or XLSX, legacy or unified format). Totals and wasted spend are counted over every row; you get an ACoS optimization plan.
Refund Recovery
Matches three Seller Central reports (FBA customer returns, Inventory Ledger, Reimbursements) to find units Amazon may still owe you for. Each claim gets its own file-by date (60 days for warehouse losses, 60-120 days after the refund for returns) and claim text for a Seller Support case.
Restock Planner
Reorder dates and quantities per ASIN from your sales, supplier lead time, units already on order and Amazon's 28-day Low-Inventory-Level fee line, computed by code. Shows what changed since your last plan. Excel file with live formulas.
Arbiqor
A separate set of three tools.Flag: review removal odds and the removal playbook. Lens: your listing against the competitors that outrank it. Expose: competitor policy-violation report drafts.
Account Health Tips
18 daily and weekly checks to prevent suspensions.
Sample reports
See the report format for seven of our tools before you run one on your own listing.
How we keep the rules current
Amazon changes the rules our tools depend on several times a year: 75-character titles since July 27, 2026, a 3.5% fuel and logistics surcharge since April 17, 2026, a holiday peak fee from October 15 to January 14. When a rule changes, we update the tool itself (its checks or its instructions), not only the wording on the page, and log both dates in the changelog.
Rules last checked: Oct 5, 2026 · See every change with dates →
Why sellers trust L-Guard
We're not a VC-funded startup trying to become the next Helium 10. L-Guard is founder-built and bootstrapped: built and maintained by an Amazon seller since 2017, and the tools are the ones we use ourselves. Every feature exists because we hit a real problem - not because a product manager thought it might boost engagement metrics. Our pricing reflects this: free tools where possible, affordable one-time purchases and flexible subscription plans, and no enterprise-only features hidden behind $300/month plans.
We also believe in transparency. Our blog shares real data about Amazon fee changes, algorithm updates, and seller strategies - the same research we use to build our tools - and the changelog lists each rule change with the date we updated the tool.
Questions? Ideas? Feedback?
We're always looking to improve. Reach out anytime.