Compare
Vendlen and Scale Insights.
Both automate an Amazon Ads account by rule. The difference is one layer up: whether the arithmetic is something you assemble out of parameters and then own, or something the tool already carries and publishes.
- Every claim here
- Checked against their own pages
- Features page
- Read 28 August 2026
- Pricing page
- Read 19 September 2026
- What each bill follows
- Automated ASINs, against monthly ad spend
- What Vendlen covers
- Advertising, profit and inventory, on Amazon United States
What the bill follows
A catalog is a cost on one axis and free on the other.
Neither product takes a share of your ad spend. They bill on how many products you automate; we bill on what you spend. Which is cheaper is a property of your account rather than of either tool, so here is the arithmetic on both sides.
- Vendlen bills on
- Monthly Amazon ad spend, in seventeen published steps. No cap on how many products go under Automation, on any step.
- Scale Insights bills on
- Automated ASINs. Their published tiers run Scale 5 at $78 a month through Scale 100 at $688. Alongside that ladder their page lists an unlimited-ASIN plan at 1% of monthly ad spend, arranged by contacting them; the minimum is not published.
100 products automated, $2,000 a month in ad spend
Vendlen Starter 01 — $79
Scale Insights Scale 100 — $688
100 products automated, $50,000 a month in ad spend
Vendlen Pro 03 — $499
Scale Insights Scale 100 — $688
250 products automated, $120,000 a month in ad spend
Vendlen Pro 04 — $669
Scale Insights Their 1% plan — $1,200 at that spend, if you qualify
Our column is the published ladder on /pricing; theirs is their published pricing page. Their 1% plan is shown only at a spend where it is plausibly on offer: their page does not publish who may buy it, and 1% of a small spend lands under their smallest published tier. A catalog is a fixed cost on their axis and free on ours, so the shape of the account decides which is cheaper, and at $50,000 the two land a dollar apart — run your own two numbers before you take either page’s word for it.
What Vendlen carries
- 4Trigger modesEach carries its own published arithmetic, rather than a threshold you assemble yourself.
- 5Rule familiesBidding, dayparting, negation and unnegate, negative word, and keyword import. Blacklist and Whitelist sit at ASIN level beside them.
- 14Campaign typesSix Sponsored Products, five Sponsored Brands, three Sponsored Display — one campaign per type per selected ASIN.
- 180Days a rule can readThe ceiling. The ladder opens from 90 days to 180 as it rises, and an Automation Window add-on buys the difference on a lower step; no plan and no add-on goes past 180.
The difference
Who writes the arithmetic.
Their page advertises 200+ parameters and unlimited rule-stacking. That is an accurate description of a powerful tool, and also of who is responsible when the calculation is subtly wrong. Vendlen puts the calculation inside a named mode and publishes what it does.
How far back a rule may look
Vendlen
Up to 180 days. The top of the ladder carries it outright, and an Automation Window add-on raises a lower step to 120 or 180 — a rule reads the window as one block.
Scale Insightsfrom use, not their page
Ninety days, from running the product. Their Features page does not discuss data windows in either direction.
Where the arithmetic lives
Vendlen
Four trigger modes, each carrying its own arithmetic: Standard Criteria, Loss Budget Guard, Momentum Guard and Performance Deterioration. You choose the mode; the calculation inside it is specified and published.
Scale Insights
Their page describes 11 algorithms, 200+ parameters and unlimited rule-stacking. The arithmetic is assembled from parameters, which means you are its author.
What a threshold measures
Vendlen
Loss Budget Guard measures money above an economic threshold rather than a ratio, so a target losing $8 and a target losing $800 are not the same event at the same ACOS.
Scale Insights
Their published rule list is stated in terms of target ACOS and performance thresholds.
How a decline is confirmed
Vendlen
Performance Deterioration confirms failure at both a 60-day and a 30-day checkpoint against a longer Historical Window. Momentum Guard reads a 90–180 day baseline against 60, 30 and 14 day order-pace checkpoints.
Scale Insights
Their page does not describe a multi-checkpoint confirmation step. Expressing one means stacking two to four rules — the worked example below builds one from four things — and deciding each threshold yourself, which is the Amazon Ads judgement the model leaves to the operator.
Undoing a negative
Vendlen
Remove Negative Exact and Remove Negative Phrase are first-class actions. Negation rules are configured two-way, because the reverse is what makes the forward direction safe to run.
Scale Insights
Whitelist prevents a keyword being negated. Revive raises bids on keywords that went quiet. Their page states no way to remove a negative that has already been created.
Reading the account before a rule exists
Vendlen
AI Analyst reads what the account already contains and writes a Decision Brief — the action, the reason, the evidence rows, the period they were read at, the scope, and a confidence. It does not require you to model the catalog first, and the rule is the step after you agree with a brief rather than the step that produces one.
Scale Insights
Their page describes rules assigned to the campaigns and targets you choose. It does not discuss reading an account and proposing a decision before a rule exists.
Building campaign structure
Vendlen
Campaign Sets expand into 14 campaign types — six Sponsored Products, five Sponsored Brands, three Sponsored Display — one campaign per type per selected ASIN, previewed as a list before anything exists, and created paused.
Scale Insights
Their Mass campaigns section offers five builders — Bulk Auto, Fully Managed, Split Keywords to Campaigns, Split Products to Campaigns and Dayparting. All five are Sponsored Products structures.
Scale Insights column: their Features page, 28 August 2026; their pricing page, 19 September 2026. Rows marked from use come from running the product, where their page does not cover the subject. Nothing here says what they cannot do. Tools change — tell us if a row is out of date.
Worked example
One requirement, and what it costs to express.
The requirement: a keyword that used to convert has stopped. Do not act on one bad fortnight — act when the decline is confirmed.
Composed from parameters
- A rule establishing the long baseline the keyword is measured against.
- A rule checking the first, longer window for the shortfall.
- A rule checking the second, shorter window, so one bad window cannot fire it.
- Something to keep the three in agreement as you tune any one of them.
Four things to maintain, and the arithmetic is yours. When it fires on the wrong keyword, the rule was doing exactly what you configured.
One rule, one mode
Trigger mode: Performance Deterioration
The mode already defines what confirmation means: failure at both a 60-day and a 30-day checkpoint, against a longer Historical Window. You choose the mode and the window. You do not author the confirmation logic, and you cannot get it subtly wrong.
One rule to maintain, and the calculation is published, so you can disagree with it on the specifics rather than on the outcome.
And a mode you are not allowed to pick
Set a rule to remove a negative and Vendlen forces it back to Standard Criteria. Performance Deterioration is the shape was good, now bad — the right direction for creating a negative and exactly the wrong one for undoing it. A tool that hands you parameters will let you build that rule, run it on schedule, and return results that mean nothing. Fewer options, in the one place where the extra option is a trap.
Settle it yourself
Ask the tool you are using now.
Two things we believe from running both products that no public page states in either direction. Rather than assert them about a named company, here they are as questions you can answer inside your own account in ten minutes.
Can it show you Sponsored Brands Image search terms?
Search term coverage is not uniform across ad products, and a tool that silently drops one is making its negation and harvesting decisions on a partial account. Vendlen reads them: Search terms carries a Headline search ads view alongside Products. Open your own search term view, filter to a Sponsored Brands Image campaign, and see what comes back.
How many rules does one requirement cost you?
Take a requirement you actually have — the worked example above is a real one — and build it in the tool you are using now. The number of rules it takes is the number you maintain, and the number that can drift out of agreement with each other.
The overlap
And what is genuinely the same.
Stated plainly, including two capabilities it would have been easy to claim as ours alone. A narrow difference is worth more against an honest background than a flattering one.
- Rule families
- Both cover bidding, dayparting, negation, blacklist and whitelist, and keyword harvesting. Vendlen also exposes unnegate and negative word as named rule directions.
- Seeing a change before it happens
- Both show what a run would change before it is applied.
- A record afterwards
- Both keep a log of what was changed.
- Search term aggregation
- Both aggregate search terms across an account.
Buy theirs, not ours
One case where Scale Insights is the better buy.
If one of these describes you, nothing above should have changed your mind.
You already know exactly the rules you want
Scale Insights advertises 200+ parameters and unlimited rule-stacking. If you can already state your strategy precisely and you want to express it yourself, that is what it is built for, and Vendlen’s named modes will feel like someone else’s opinion in your way.
Read a judgement before you make it a rule.
Connect the account you already run, open a Decision Brief, and see the action with the evidence rows, the period and the scope it applies to. The rule is the last step, not the first.