Quizlet receives performance and security benefits, while saving more than 50% on their Google Cloud networking egress bill by using Cloudflare.
Saving 50% on monthly Google Cloud Network Egress Bill
76% reduction (or over 10 Tb) of daily bandwidth use
Quizlet's Challenges: Mitigating DDoS Attacks and Globally Serving Content
Quizlet is the most popular online learning service in the United States, with a top 50 website and iOS and Android apps
consistently ranked in the top 10 educational apps in their respective stores. As the site became more and more popular,
it also became a bigger target for bad actors. Peter Bakkum, platform lead at Quizlet, recounted that "as we grew and
became a more visible target, we were starting to have trouble with DDoS attacks on our site preventing students from
accessing study material." Furthermore, Quizlet was still serving traffic out of a single region in the US, which was
limiting it’s ability to quickly serve content to a global student base. In order to meet the goal of making its learning
tools readily available to the world, Quizlet needed a way to both protect its website from the increase in DDoS attacks,
while simultaneously distributing its content internationally with high performance.
Quizlet found a solution to their problem that was easy, affordable, and effective. Quizlet enrolled in Cloudflare's CDN, DNS,
WAF, and DDoS mitigation services and immediately noticed a dramatic improvement. Bakkum related that "The reason we use Cloudflare
is because the security features are excellent, the CDN is high performing, and using a single solution is very convenient.
It simplifies everything and allows us to focus on our core business."
While Quizlet focuses on their core business, Cloudflare helps to quickly and securely serve content around the world. Bakkum
further explained "We take connectivity in places with poor internet really seriously, so the latency benefits of Cloudflare
are huge for us. Because we run out of a single region in the US we've seen dramatically increased performance for our international
students because of Cloudflare's global caching." Furthermore, Quizlet sees security benefits that simultaneously protect its
site and further increase its performance. This is possible because Quizlet's site now sits behind Cloudflare's network, which
means malicious traffic is diverted away from hitting Quizlet's origin server by Cloudflare's Web Application Firewall (WAF),
and DDoS attacks are mitigated through Cloudflare's advanced web security. In addition, Bakkum was delighted that "our TLS
traffic sees significant performance benefits because Cloudflare handles SSL negotiations edgeside closer to the user."
Cloudflare not only helps Quizlet with security and content distribution, but also helps save them thousands of dollars on their
monthly Google Cloud Services bill. In May 2016, the last month of school and a busy time for Quizlet, Cloudflare helped cut
their network egress bill by more than 50%— which translated to thousands of dollars that Quizlet saves every month thanks to
Cloudflare. On average, Quizlet saves over 10Tb of bandwidth every day.
"The reason we use Cloudflare is because the security features are excellent, the CDN (Content Delivery Network)
is high performing, and it’s really convenient that these solutions are packaged together. It makes managing everything easy,
and allows us to focus on our core business."
-Peter Bakkum, Platform Lead at Quizlet