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Nostra uses AI to power leading Shopify stores and websites. Read their stories to see if Nostra is the right fit for your business.
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Across 317k sessions, Nostra cut Time to First Byte by more than 55% on Carve Designs' top 10 most-trafficked URLs, from the homepage to sale landing pages to new arrivals. Mobile conversion lifted 6.03%, revenue per visitor lifted 5.76%, and the math compounded into a 12.8X return.
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Warmies paused Nostra in early October 2025 to run a 30-day in-house Shopify optimization sprint. Their team wanted to see how far they could push site speed through their own theme updates, app cleanup, and Shopify improvements. After the sprint, they turned Nostra back on November 9, 2025 to compare the optimized Shopify stack with Nostra layered back in.
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Kut from the Kloth, a premium denim and apparel brand, is one of the best-performing brands in Nostra's portfolio. A full year into the partnership, Nostra ran a live holdout test on their production traffic — and shoppers who served the Nostra-accelerated experience were converting 17.01% higher than the control group.
“Must have for any e-commerce site"
The team behind Nostra is phenomenal, from the initial calls to trial and setup, they have been absolutely great. It was such a breeze to get setup and getting any changes done. The app does what it says, it installs in minutes, and gets working pretty much immediately. You can definitely see an increase in store conversions, about 15-20% increase from what we see. We will need longer testing periods to confirm but so far so good.
Their pricing is little high especially if your web traffic is on the lower end but if you have over 50,000 views a month, then it is worth every penny. If they offered smaller tiers to start, that would be great too. Regardless, it should pay for itself.
Faster web page speeds, maintaining it above 80 and 90's which helps with the user experience significantly and thus creating more sales through better conversion rates. We often have our site optimized but they tend to fade over time. With Nostra, you can rest assured that your page speeds are always at its best.
“Best in class onboarding and a super fast site”
The Nostra team were fantastic during onboarding. We dealt with the same people throughout the sales process right through to launch. I'm not a super 'tech-savvy person, so I really appreciated the time and care they took to explain how their product worked. Most importantly, though, our website is now super fast. Over the years, we've manually tried to speed up our site, but I've really noticed a difference. Once Nostra is up and running, you can 100% notice the difference.
There's not really any downsides. Our website is a LOT faster, and their support is super responsive.Review collected by and hosted on G2.com.
Like most e-commerce stores, our website is loaded with images which slows down the site speed. Nostra has increased our site speed which has increased our conversion rate. There is a noticeable difference in our website speed before and after installing Nostra.
300+ enterprise and high-growth brands rely on Nostra to deliver instant site speed, stronger SEO performance, deeper personalization, and clean, actionable marketing data.
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