If you are researching Amazon PPC software, you have probably run into both Perpetua and Off Hours. They both touch Amazon advertising, but they do different things. This post explains what each one is built for, where they diverge, and how to decide which one fits your situation.
Full disclosure: this post is written by Off Hours. We have tried to be honest about what Perpetua does well and where it is a better fit than us. If that framing sounds suspect, the Perpetua vs Helium 10 and Perpetua vs other tools posts on their site exist for the same reason. Comparison posts are part of how software companies get found. We would rather write an accurate one than leave the search results to someone who does not know either product.
What Perpetua is
Perpetua is a full-service Amazon PPC optimization platform. The core is AI-driven bid management: Perpetua's algorithms continuously adjust keyword bids to hit a target ACoS or ROAS. It handles keyword harvesting from auto campaigns into manual ones, manages campaign structure, and provides analytics and reporting across your account.
Perpetua also supports Sponsored Brands and Sponsored Display campaigns, not just Sponsored Products. It covers more of the Amazon advertising surface than most tools. For sellers who want a single platform to handle the day-to-day optimization work without building their own bid rules and keyword management processes, Perpetua is a reasonable fit.
Pricing scales with ad spend, which means costs grow as campaigns grow. This is standard for full-service ad optimization platforms but is worth knowing upfront if you are projecting costs on a higher-spend account.
What Off Hours is
Off Hours is a scheduling and automation tool for Amazon Ads. The core is four types of rules: dayparting (pause and resume campaigns by hour of day and day of week), budget rules (raise and restore daily budgets on a schedule), event rules (coordinate campaign behavior around tent-pole events like Prime Day and BFCM), and performance rules (adjust budgets or send alerts based on prior-day metrics like ACoS and spend).
Off Hours does not do bid management. It does not harvest keywords. It does not restructure your campaigns. What it does is give you explicit, transparent control over when your campaigns run and how your budget is allocated across time. Every rule is readable: "pause these campaigns between 11pm and 6am on weekdays" or "boost daily budget by 40% from November 27 through December 1, then restore to baseline." You can see exactly what will happen before it runs.
Pricing is per seller account, flat rate, not tied to ad spend. Full details are on the pricing page.
Where they genuinely overlap
Both tools aim to reduce wasted ad spend and improve account efficiency. Both integrate with Amazon Ads via the API and operate in the background so you are not making manual adjustments constantly. Both produce data you can use to make better decisions about your campaigns.
The overlap ends there. Perpetua optimizes bids in real time. Off Hours controls schedules and budgets on a structured timeline. These are complementary levers, not competing ones.
Who Off Hours is right for
Off Hours fits sellers and agencies who want explicit control over when campaigns run and how budgets move over time. The buyers who get the most out of it tend to share a few traits.
They already have a sense of when their campaigns perform well. They know that their conversion rate drops in the early hours of the morning, or that weekends outperform weekdays for their category, and they want to act on that without making manual adjustments every day. The dayparting guide covers how to find these patterns in your account data.
They run events or seasonal spikes. If you manage Prime Day, BFCM, launch windows, or any recurring promotional calendar, Off Hours event rules give you a structured way to ramp into and out of those moments cleanly. Harbor Kitchen, a housewares brand, uses event rules to pre-schedule BFCM budget changes in September so the execution is already in place before the event.
They want to understand what is happening to their campaigns. Off Hours rules are explicit and readable. You know exactly what will change, when, and why. For sellers who have had bad experiences with black-box optimization tools that made changes they could not explain to clients or stakeholders, this transparency matters.
They are managing multiple accounts. Agencies and multi-brand operators use Off Hours to apply consistent scheduling rules across many accounts without building custom automation. The agency management guide covers this in detail.
Who Perpetua is right for
Perpetua fits sellers who want their bid management handled automatically without building their own optimization process. If you are running significant spend and do not have the internal capability or bandwidth to manually optimize keyword bids and harvest search terms weekly, a platform like Perpetua handles that loop for you.
It is also a fit for sellers who want to expand across sponsored ad types. Perpetua's Sponsored Brands and Display optimization goes beyond what most rule-based tools cover. If you are actively scaling into those ad types and want algorithmic optimization across all of them, that is a genuine advantage.
The spend-based pricing is worth modeling before committing. At higher ad spend levels, a percentage-of-spend fee becomes a meaningful line item. At the same time, if the platform is delivering meaningfully lower ACoS, the ROI can justify the cost.
Can you use both?
Yes. Some accounts run Perpetua for bid optimization and keyword management while using Off Hours on top for scheduling. Off Hours rules operate at the campaign level via the Amazon API independently of how bids are being set. The main thing to monitor is that both tools are not trying to modify the same campaign attribute simultaneously. Running Off Hours for pause/resume schedules alongside Perpetua's bid optimizer is generally clean because they are touching different settings. Running both tools' budget adjustment features on the same campaigns at the same time could create conflicts.
If you are considering both, map out which tool owns which lever before you set rules in both places. For most accounts, the combination makes sense when you want scheduling control (Off Hours) plus automated bid management (Perpetua) and can keep their responsibilities clearly separated.
Frequently asked questions
What does Perpetua do for Amazon advertising? Perpetua is a full-service Amazon PPC optimization platform. It automates bid management using AI-driven algorithms, manages keyword harvesting and campaign structure, and provides reporting. It covers Sponsored Products, Sponsored Brands, and Sponsored Display. It is designed to handle much of the day-to-day optimization work automatically.
What does Off Hours do that Perpetua doesn't? Off Hours specializes in scheduling and rules-based automation: dayparting (pausing and resuming campaigns by hour of day), budget rules (raising and restoring daily budgets on a schedule), event rules for tent-pole moments like Prime Day and BFCM, and performance rules that react to prior-day metrics. It gives sellers explicit control over when and how their campaigns run, with transparent rules they can read and adjust.
Can you use Off Hours and Perpetua together? Yes. Some sellers use Perpetua for bid management and keyword harvesting while layering Off Hours on top for scheduling. Off Hours rules operate independently of bid automation. The main thing to watch is that if both tools modify the same campaign settings simultaneously, you can get conflicts. Running Off Hours for dayparting pause/resume alongside Perpetua's bid optimizer is generally clean since they touch different levers.
Is Off Hours cheaper than Perpetua? Off Hours is priced per seller account, starting at a flat monthly rate regardless of ad spend. Perpetua's pricing scales with ad spend, which means cost increases as your campaigns grow. For high-spend accounts, Off Hours is typically significantly cheaper. For accounts spending under a few thousand dollars per month, the price difference may be smaller.
If scheduling and budget automation is what you are looking for, Off Hours is built specifically for that. Start a free 14-day trial to see how rules work in your account. If you are primarily looking for bid management and keyword automation, Perpetua may be the better starting point.