RedHen Labs vs SellerStack
SellerStack is flat-fee Amazon PPC software, and on the pricing model we agree: their page says "the bill does not change when your ad spend grows." Standard is $239 a month billed annually or $299 month to month, Pro is $959 or $1,199, there is a free plan, and each additional account adds $119 a month on annual billing.
Their rules are off until you switch them on — "Nothing changes a bid until you turn it on" — and then they run. The differences with us are the number and the default: $129 a month, and every automation starts in an approval queue.
Same flat-fee idea, about half the price
We agree with SellerStack on the model: a bill that doesn't grow with your ad spend. The gap is the number. Standard is $239 a month billed annually or $299 month to month; RedHen Labs is $129. Over a year, that's $1,320 to $2,040 you keep.
Switched on, or approved
SellerStack's rules are off until you enable them — "Nothing changes a bid until you turn it on" — and then they run. RedHen Labs adds a step in between: by default each change waits in a queue for your approval, with one-click undo, and you choose which automations, if any, run unattended.
When SellerStack is the better pick
If you want to try rule-based automation without paying anything, SellerStack has a free plan. We don't — our trial is 14 days.
Side by side
- Pricing: SellerStack: $239/mo billed annually or $299 monthly (Standard); $959 or $1,199 (Pro); a free plan. RedHen Labs: $129/mo flat.
- Percentage of ad spend: SellerStack: None. RedHen Labs: None.
- Additional accounts: SellerStack: $119/mo each on annual billing. RedHen Labs: One plan per seller account.
- How changes are made: SellerStack: "Nothing changes a bid until you turn it on" — then rules run. RedHen Labs: Approval queue by default — unattended only for the automations you switch on, one-click undo, and Sponsored Display always waits.
- Free trial: SellerStack: 14 days. RedHen Labs: 14 days.
Pricing and product description checked against sellerstack.ai on October 5, 2026.
Try RedHen Labs free for 14 days — $129/mo flat, never a percentage of ad spend.
Why we don't charge more
We could charge more. We don't, and it isn't because this is a lighter product — it's because it's a focused one. We built the things an Amazon seller actually touches every week and left out the twenty modules that pad a suite. A focused product costs less to build and less to run, so it can cost less to buy.
The other reason is simpler. By the time a seller has paid referral fees, fulfillment, storage, returns, and advertising, a lot of hands have already been in the till — and then an agency wants a percentage of sales and a tool wants a percentage of spend. The person who designed the product, paid for the inventory, and carries every bit of the risk ends up with the thinnest slice of it. We decided not to be one more toll on that road. $129 is a number we can hold at any account size, which means growing your business never costs you more to keep using ours.