Launch offer

30 days free, then $15/mo flat

unlimited ASINs · all marketplaces · all 20+ alerts

Start free — claim $15/mo flat →

SentryKit Pricing

Pricing

Simple, flat pricing — based on your storefronts.

Start with 30 days free, no card. Every plan includes all 20+ alert types, unlimited ASINs, every marketplace, and the full API and webhooks. Your price is based on one simple thing — how many storefronts you run.

Starter
For sellers running one or two storefronts who need to act fast.
$19/mo
billed monthly
Start 30-day free trial
Monitoring & alerts
Buy Box monitoring across all ASINs & marketplaces
All 20+ real-time alerts — Buy Box, hijacker, suppression, out-of-stock
Competitor price alerts with exact delta & floor check
Daily portfolio digest
Included
2 storefronts, unlimited ASINs, every marketplace
30-day history · email, dashboard & Google Sheets
COGS entry & floor-price calculator
Connect & automate
Full REST API and outbound webhooks — included, not an add-on
50,000 API calls a month · signed payloads, retries, delivery log
Route alerts anywhere — Zapier, Make, or your own endpoint
★ Most popular
Pro
For serious sellers and multi-account operators who want to understand competition, not just monitor it.
$49/mo base
5 storefronts included · scales below
Start 30-day free trial
Everything in Starter, plus
Competitor intelligence
Competitor seller profiles on every Buy Box event — name, location, storefront size, feedback rating
US-based vs. overseas flag on every competing seller
Seller re-occurrence detection — know when the same competitor keeps showing up
Pricing & margin control
Margin-threshold alerts & full auto COGS (referral + FBA fees)
Buy Box history & priority support
Connect & automate
25,000 API calls per storefront, per month — 125,000 at 5 storefronts
Buy Box transition history via API — previous winner, new winner, landed price, and how long the Buy Box was held
No overage charges, ever — past your allowance we slow you down, we never bill you
How many storefronts do you manage?
5
5 included · next storefront +$19
Your Pro plan $49/mo
Your API allowance 125,000 calls/mo
API Partner
For teams who already run their own dashboard, warehouse or reporting layer.
$1,200/mo
six-month minimum
Talk to us
Everything in Pro, plus
Unmetered API within a published rate limit
Custom event types built for your pipeline
Portfolio roll-up across client accounts
History backfill on request
How it works
30-day hands-on build with our engineers
A named engineer in a shared channel
Contractual uptime SLA
We feed your system — we don't replace it
Agency / Enterprise

Running many client accounts?

Pro at scale, priced to your setup — white-label alerts, consolidated invoicing across many client accounts, an uptime SLA, custom terms, and a dedicated onboarding partner. Starts around $199/mo.

🛡️ No hard cutoffs, ever. Unlimited ASINs, orders and marketplaces are included on every plan — only storefronts affect your price. The API and webhooks are included too, and there are no overage charges: if you pass your monthly call allowance we slow you down for the rest of the cycle, we don't send you a bill. If orders spike during Q4 or a flash sale, your alerts keep running. We're not in the business of going dark when you need us most.

Frequently asked questions

Only storefronts — the number of Amazon seller accounts you connect. ASINs, orders, and marketplaces are unlimited and included on every plan. Starter includes 2 storefronts, Pro includes 5, and Pro scales with declining per-storefront pricing above that.
No limits — monitor 50 ASINs or 50,000, at any order volume, for the same price. Your plan is based only on the storefronts you connect, so your bill only changes if you add a storefront.
A storefront is one Amazon Seller Central account. A single account can sell across many marketplaces (US, UK, Germany, etc.) — those are all included under one storefront at no extra cost. You only use more than one storefront if you run separate Seller Central logins for different regions, brands, or clients.
Almost certainly not. Amazon splits the world into regional accounts (North America, Europe, etc.), so a single global business typically runs 2–3 storefronts. Starter covers 2 and Pro covers 5 — enough for nearly every single-business seller, regardless of how many countries you sell in. You're never charged just for selling across regions.
Storefronts 6–15 are $19 each, and the per-storefront rate drops in volume bands as you grow (16–30: $14, 31–60: $10, 61+: $7) — so the more storefronts you add, the less each one costs. Your exact monthly total is always shown live before you commit. For example, 8 storefronts is ~$106/mo, 15 is ~$239/mo.
You get 30 days free with full access to every feature and alert type — unlimited ASINs, all marketplaces, no card required. Pick a plan any time before the trial ends; nothing is charged until you do.
Yes — annual billing saves 20%. Starter drops from $19 to ~$15/mo and Pro's base from $49 to ~$39/mo, with the same discount applied to any additional storefronts. You can switch between monthly and annual any time in settings.
Always. Your monitoring runs continuously through Q4, flash sales, and seasonal peaks — full coverage exactly when you need it most.
No automatic change. If you're on an existing plan, any pricing update is communicated by email with clear migration options and a transition period — and we won't raise your price or move you to a new plan without your confirmation.
Included, on every plan. The full REST API and outbound webhooks come with Starter and Pro at no extra cost — there's no API tier, no add-on SKU, and no sales call. Most tools in this category put programmatic access behind an enterprise plan. We don't. Want to test before you pay? The 30-day trial includes full API access and needs no card.
Your allowance is 25,000 calls per storefront, per month — so 50,000 on Starter and 125,000 on Pro at five storefronts. Your live allowance is shown in the plan calculator above and in your dashboard. If you pass it we reduce your request rate for the rest of the billing cycle and email you — we never block your integration and we never charge overage. If you consistently need more, talk to us and we'll raise it.
Pro gives you the same API everyone else gets, metered by storefront. API Partner removes the monthly meter, adds event types built for your specific pipeline, and puts one of our engineers in a shared channel with you for a 30-day build. It's for teams who already have somewhere to put the data — a dashboard, a warehouse, a reporting layer — and want us feeding it rather than competing with it.
Yes. Agency / Enterprise is Pro at scale, priced to your setup — white-label alerts, consolidated invoicing across many client accounts, an uptime SLA, custom terms, and dedicated onboarding. It starts around $199/mo. Talk to us.
It's in build. If you want to be told when it's ready, add your email to the waitlist on our API page.