Leju Enhances Security and Cuts Bandwidth Costs with Cloudflare
Leju Technology Inc.
Promoting Housing Price Transparency
Leju is committed to providing transparent, accurate, and real-time transaction data to all consumers, solving the long-standing issue of information asymmetry in the real estate market. Users no longer need to rely on word-of-mouth from agents or fragmented government data to make decisions. Leju organizes its information based on first-hand data from Taiwan’s official real price registration system—making it fair, open, honest, and free to access.
Making Real Estate Information Easier to Read
While many public platforms offer access to housing transaction data, most of them simply display raw government data without refinement. This leads to common issues such as combined vehicle and house pricing, which distorts actual housing values. Leju aims to solve these problems by optimizing the user experience, cleaning and restructuring the data back to community-level insights—making it an actionable tool for home buyers.
Cloudflare Implementation at Leju
Although Leju has not yet experienced a DDoS attack, it has encountered spikes in front-end CPU usage caused by uncontrolled web crawlers scraping page after page—affecting real users' access. Previously, the IT team had to manually identify issues via log analysis, often interrupting meetings to troubleshoot, which was both time-consuming and labor-intensive.
In this industry, crawler attacks are common due to the value of the data. Leju previously relied on manual judgment, but now, thanks to Cloudflare’s filtering tools, it's easy to classify blocked requests by cause. For example, if abnormal requests are detected from specific countries, access rules can be quickly created by IP or country—greatly simplifying IT operations while ensuring that legitimate users remain unaffected.
While Leju already focused on website optimization, Cloudflare’s CDN further reduced bandwidth usage—saving approximately USD 100 per month, which has had a tangible impact.
Our experience with Cloudflare has been very positive. The interface and workflows are user-friendly and cost-effective, making it easy to identify and resolve issues quickly. It has saved us a great deal of time, and we plan to explore more features such as R2 and image optimization in the future.
Cloudflare also allows filtering by time period and topic, helping us generate targeted visual reports.
In addition, the UAT environment can mirror the production site and exclude unnecessary IPs, making pre-deployment testing much easier. All configurations made in UAT can be directly applied to the live site.
Leju is very strong in the B2C sector. We've invested significant resources into APIs and data accuracy for users. Cloudflare protects these assets from being taken by competitors or unauthorized entities, ensuring that the value of our data benefits our shareholders and team.
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