DoggyBagg LLCPrice Drop Alerts · Comparison
Keepa · Helium · SentryKit · Aura · ART-01
Honest split: trackers and repricers show or move price. ART-01 is the portable 24h response protocol — match / hold+cut ads / promo — after any tool fires. They stack. ART-01 does not replace your monitors.
What everyone is doing now (week of 2026-07-26)
- SentryKit: Selling ~$19–$49/mo Buy Box / hijacker alerts with floor math + “3 ranked recovery actions” inside their feed. Agency from ~$199/mo. War = alert latency + SP-API depth.
- SellerSonar: Polling alerts + keyword SOV; Buy Box often gated to higher tiers. Surfaces events; org default still invented in Slack.
- Aura / repricers: Publishing 2026 Buy Box / Featured Offer targeting guides — automate match/undercut within floors. Leave MAP politics, PPC cuts, and client approval human.
- Keepa: Still wins charts; free-tier tracker cuts (~200) + Pro billing anger. Zero match/hold/promo matrix.
- Helium 10: Starter gone · Platinum ~$129/mo · Alerts capped (~5 ASINs lifetime lore). Suite tax ≠ response SOP.
- Amazon: Featured Offer eligibility gate removing Jul 2026 (EU/UK ~20 Jul; global through YE) → more offers → more pings → more freeze.
None of them productize a seatless, one-time, tool-agnostic Response Protocol for agencies at $490. That whitespace is ART-01.
The SentryKit narrative trap
SentryKit markets: event → ranked recovery. That sounds like “what to do.” It is still SaaS scoped to their alert payload — login, monthly, SP-API.
- Them: actions tied to their Buy Box / hijacker event
- Us: defaults for any undercut (pricing + PPC + promo) after Keepa/Helium/Sonar/SentryKit/Slack
- Them: agency workspace + seats from ~$199/mo
- Us: Agency 10 file license $490 one-time — pin in client Slack, no new dashboard
Do not buy ART-01 to replace SentryKit. Buy it when the freeze is the problem.
Who wins what
| Job | Keepa / Helium | SentryKit / Sonar | Aura-class | ART-01 |
|---|---|---|---|---|
| Live charts / suite research | Wins | Narrow | No | Not included |
| Real-time Buy Box / hijacker alerts | Partial / capped | Wins | Adjacent | Not live monitoring |
| Auto reprice to Featured Offer | No | No | Wins | Not a repricer |
| 24h org default (price+PPC+promo) | You invent | Tips in their UI | Price rules only | Wins — matrix + worked alerts |
| Agency client handoff (no new login) | Screenshot + Slack | Their seats / routing | Their rules engine | Wins — portable protocol |
| Pricing model | ~€19–$129+/mo | ~$19–$49/mo · agency ~$199+ | Monthly software | $490 Agency · $49 Solo · one-time |
Buy ART-01 when
- Featured Offer pool widened and undercuts / new offers spiked
- You already pay for Keepa, Helium, Sonar, or SentryKit — and still freeze
- Helium’s price/alert limits made “more software” the wrong fix
- An agency needs a client-handoff SOP, not another login
- Repricer is on — but MAP / PPC / promo still need a human default sheet
Skip ART-01 when
- You need live scrapes, dashboards, or ASIN watches — buy Keepa / SentryKit
- You want a software replacement for monitoring or repricing
- You expect custom setup or ongoing analyst labor for $49 / $490
Recommended stack
Keepa and/or Helium and/or SentryKit for signal → Aura-class only if you want autopilot price → ART-01 for the 24h response playbook → your team executes. One purchase. Instant download.
Not competing on their field
We will not race on alert latency, ASIN caps, or Buy Box %. Category ownership = Competitor Undercut Response Protocol.
Product page · Sample deliverable · Pass the word · Lemon · DoggyBagg LLC