Sold by: c/sideÂ
Deployed on AWS
c/sides monitors, secures and optimizes 3rd party JavaScript. We see the payload of the scripts on every request, and keep track if any malicious changes. Primarily, c/side aims to stop 0-day 3rd party JavaScript attacks. We see the code in real time, loaded in the proxy, and block any malicious activity. See the full overview and code changed in our dashboard, along with compliance reports.
Overview
c/side secures the final link in the web supply chain: the client-side. Our 3rd party JavaScript proxy checks the payload of the script on every request. Allowing us to spot changes, malicious activity and block proactively before the altered code touches the browser of your user.
Our dashboard highlights the changes with AI explaining the functionality. Our deobfuscation functions allows engineers to understand fully what code actually gets served the the browser of their users and visitors. Certain compliance regulation (PCI DSS 4.0.1) requirements are ticked off by our compliance dashboard, including configuration issues.
Most scripts can be optimized. We do so by rewriting (where possible) without breaking functionality, caching and better infrastructure to serve them faster. In certain scenarios we've seen up to 22x faster delivery. This nearly fully mitigates any latency in scripts that aren't loaded asynchronously.
Manage and mitigate cyber attacks targeting 3rd party scripts on your websites. Finally see and secure the end of the web supply chain.
Contact us to upgrade to our enterprise solution.
Highlights
- Blocking 0-day 3rd party JavaScript attacks: Our man-in-the-middle proxy sees the payload of the scripts served in the browser of your users. We spot and block any malicious code before it gets served to the browser of your user.
- AI explanation: Our dashboard saves all versions of the scripts, any change is recorded, saved and highlighted. Our AI features explains the change and the likely functionality of the change. Additionally, it deobfuscates the code for you to fully understand and trust.
- Compliance: Fast approaching and improved compliance regulation regarding 3rd party scripts is covered in c/side. Our PCI DSS dashboard ticks off all new requirements regarding these compliance rules.
Details
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Features and programs
Financing for AWS Marketplace purchases
AWS Marketplace now accepts line of credit payments through the PNC Vendor Finance program. This program is available to select AWS customers in the US, excluding NV, NC, ND, TN, & VT.
Pricing
Pricing is based on the duration and terms of your contract with the vendor. This entitles you to a specified quantity of use for the contract duration. If you choose not to renew or replace your contract before it ends, access to these entitlements will expire.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
Dimension | Description | Cost/month |
|---|---|---|
Business | Business plan | $99.00 |
Vendor refund policy
Contact our support team for refund information at support@cside.dev .
Legal
Vendor terms and conditions
Upon subscribing to this product, you must acknowledge and agree to the terms and conditions outlined in the vendor's End User License Agreement (EULA)Â .
Content disclaimer
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Delivery details
Software as a Service (SaaS)
SaaS delivers cloud-based software applications directly to customers over the internet. You can access these applications through a subscription model. You will pay recurring monthly usage fees through your AWS bill, while AWS handles deployment and infrastructure management, ensuring scalability, reliability, and seamless integration with other AWS services.
Support
Vendor support
We have live support present inside our application or you can write an email to our support team at support@cside.dev .
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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Customer reviews
0 ratings
0 AWS reviews
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9 external reviews
Star ratings include only reviews from verified AWS customers. External reviews can also include a star rating, but star ratings from external reviews are not averaged in with the AWS customer star ratings.
Information Technology and Services
Solid product. Works well. Great support
Reviewed on Jul 29, 2025
Review provided by G2
What do you like best about the product?
Product is great. Onboarding was super easy. After registering I learned a lot about our website and potential threats with foreign scripts. Support is also very helpful—the folks respond very diligently and help as much as they can.
What do you dislike about the product?
It’s clear that they’re still growing, so one of my qualms is that there are a lot of moving parts… The interface changes here and there but overall it’s pretty manageable.
What problems is the product solving and how is that benefiting you?
I feel safe that they are vetting the scripts on my website, and they specialize in a whole group of different threats I hadn’t considered prior. They also help with compliance so that’s a huge plus.
Joseph M.
Surprised more platforms don't have these features
Reviewed on Jul 22, 2025
Review provided by G2
What do you like best about the product?
c/side tells me everything I need to know about a script, and proactively makes sure they are safe to show to the user - if not, they detect/block it and let me know. It's also really helpful to view the script history, so I can figure out what changed if a new version seems a little sketchy. It's really made me realize how big of a problem 3rd party script security is, and there are no other solutions I've tried that dives as deep as c/side. The team is super responsive if you need support for anything, and while I don't need PCI/DSS compliance, it's great to know they cover that as well.
What do you dislike about the product?
As someone who's not super technical with how the web itself behaves, parts of how the dashboard worked (and how they explained certain concepts) was a little confusing, but reaching out to their team helped clear a lot of it up. I can tell the product is only going to keep getting better and easier to use from here.
What problems is the product solving and how is that benefiting you?
I run a small side-company that I have lots of third party scripts on, for tracking/ads/widgets etc, and I need full security to make sure I'm not posing any risks to my users. c/side genuinely solves everything I needed, and keeps me in the know with emails about any fishy scripts or attacks.
Edgardo C.
A must have if you use third party scripts
Reviewed on Jul 20, 2025
Review provided by G2
What do you like best about the product?
I use so many third party scripts, analytic tools, support widgets, polyfills, animation libraries, cdns, any of these could go rogue and replace the legit content with a keylogger or worst. Cside will email me if that happens, none of them have gone rogue yet, but Cside even warns me and shows me insights when a script changes their behavior. Such a great tool, very easy to use and simple set up on my react app, I check the dashboard every few weeks and always find something interesting about my scripts.
What do you dislike about the product?
Understanding how the proxy prefixing works and how to prevent double fetch is tricky but once you understand what is going on it's alright. Besides that, I noticed some of my scripts were using timestamp in the URL for cache busting and it flood my dashboard with entries. I changed some of those scripts and used their pattern matching feature in others.
What problems is the product solving and how is that benefiting you?
Cside will let me know if my thid party dependencies suddenly change their behavior or something suspicious happens like a domain transfer.
Bart D.
loved my c/side experience - highly recommend
Reviewed on Jul 20, 2025
Review provided by G2
What do you like best about the product?
Excellent visibility into client-side scripts. The Notification integration with Slack is a nice touch! Helped me prevent a polyfill like scenario
What do you dislike about the product?
can't think of anything - will update as I find things.
What problems is the product solving and how is that benefiting you?
client side security.
Information Technology and Services
Improved speed and transparency for client side JavaScript.
Reviewed on Jun 27, 2025
Review provided by G2
What do you like best about the product?
Third-party party client-side scripts often go unchecked and are a target for malicious actors. c/side puts you back in control of your web properties ensuring that third-party scripts behave as expected and are free from vulnerabilities. It's super quick to implement and once you've done that, you are able to keep tabs on all the changes to your scripts quite easily.
What do you dislike about the product?
Honestly, there’s not much to dislike about c/side — it’s reliable and thoughtfully designed. I’m eager to see even more advanced customization options as the product continues to grow. The team has been responsive to feedback and quick to ship improvements, which gives me confidence in the roadmap ahead.
What problems is the product solving and how is that benefiting you?
Third-party script supply-chain risk.