Use Let’s Encrypt when you want direct control of HTTPS on your server, and use Cloudflare when you want faster setup, CDN protection, and simpler certificate handling at the edge. For most modern websites, HTTPS is no longer optional: Google reports that more than 95% of Chrome traffic is encrypted on several major platforms [source: Google]. The real question is not whether to enable HTTPS. It is whether your site should rely on a certificate installed on your hosting server, a proxy service like Cloudflare, or both.
TLDR: Let’s Encrypt is best if you want a free, trusted TLS certificate installed directly on your web server. Cloudflare is best if you want HTTPS plus performance and security features, such as caching, DDoS protection, and firewall rules. For example, a small WooCommerce store moving from plain HTTP to Cloudflare “Full strict” mode may secure customer logins in under 30 minutes, while a manual Let’s Encrypt setup on unmanaged hosting can take longer if DNS or renewal tasks fail. A practical rule: if you manage the server, choose Let’s Encrypt; if you manage the domain and want less server work, Cloudflare is often easier.
What Let’s Encrypt Actually Does
Let’s Encrypt is a certificate authority. It issues free TLS certificates that browsers trust. You install the certificate on your web server, usually through your hosting panel, Certbot, or an automated tool provided by your host.
This gives visitors a secure connection from their browser to your actual server. That matters. It means login forms, checkout pages, cookies, and admin dashboards are encrypted all the way to the machine serving the website.
The biggest strength of Let’s Encrypt is plain and simple: it is real server-side HTTPS. There is no middle layer required. You can use it on shared hosting, VPS hosting, dedicated servers, WordPress sites, apps, APIs, and internal tools.
- Best for: site owners with hosting access.
- Cost: free.
- Renewal: every 90 days, usually automated.
- Main risk: failed renewals if automation breaks.
Honestly, it feels like certificate renewal is the part that still annoys people most. When it works, nobody thinks about it. When it fails, browsers show scary warnings, sales stop, and the support inbox lights up.
What Cloudflare Actually Does
Cloudflare sits between visitors and your website. You point your domain’s DNS to Cloudflare, and visitor traffic passes through Cloudflare before reaching your origin server. Cloudflare can provide HTTPS to users even if your hosting setup is limited.
Cloudflare is not just a certificate tool. It is a reverse proxy, CDN, DNS provider, firewall, and traffic filter. That is why people often choose it for more than HTTPS. It can reduce server load, block basic attacks, cache static files, and hide the origin server IP in many setups.
For HTTPS, Cloudflare offers several SSL modes. The mode matters a lot:
- Off: no HTTPS. Avoid this.
- Flexible: HTTPS from visitor to Cloudflare, but HTTP from Cloudflare to your server.
- Full: HTTPS on both sides, but the origin certificate may not be fully verified.
- Full strict: HTTPS on both sides with certificate validation at the origin.
Full strict is the serious option. It protects the connection from the visitor to Cloudflare and from Cloudflare to your origin server. Flexible mode is the one that causes trouble. It can create redirect loops, mixed security expectations, and a false sense of safety.
Security Comparison
If set up correctly, both options can support strong HTTPS. The difference is where encryption starts and ends.
With Let’s Encrypt alone, the visitor connects securely to your web server. There is no proxy in the middle unless you add one. You control the web server configuration, TLS versions, redirects, headers, and renewal process.
With Cloudflare, visitors connect securely to Cloudflare first. Cloudflare then connects to your server. If you use Full strict mode with a valid origin certificate, this can be very secure. If you use Flexible mode, the second leg is not encrypted. That is usually not good enough for serious sites.
The catch is that Cloudflare can make a weak setup look better than it is. A browser padlock may appear even when the origin connection is still plain HTTP. That is why site owners should not stop at “the lock icon appears.” Check the SSL mode. Check the origin certificate. Check redirects.
Setup and Maintenance
Let’s Encrypt setup depends on your hosting environment. On good managed hosting, it may take one click. On an unmanaged VPS, expect command-line work. You may need to install Certbot, configure Nginx or Apache, open port 80 for validation, and test automatic renewal.
Cloudflare setup often feels faster. You create an account, add your domain, change nameservers, and enable the right SSL mode. DNS propagation may take minutes or hours. After that, Cloudflare handles the public certificate shown to visitors.
Expect to waste time on small details if your site already has redirects in place. A common mess is HTTP to HTTPS redirects at the server, plus Cloudflare settings doing the same thing. The result can be a loop that adds 5 to 10 seconds of failed loading before the browser gives up.
Performance and Reliability
Let’s Encrypt does not speed up your site by itself. It secures the connection. Performance still depends on your hosting, server tuning, caching, images, and code.
Cloudflare can improve performance because it caches static assets near users. Images, CSS, JavaScript, and fonts may load from Cloudflare’s network instead of your origin server. This can cut load time, especially for international visitors. It can also reduce bandwidth use on your hosting plan.
Still, Cloudflare adds another dependency. If DNS is misconfigured, rules are too aggressive, or Cloudflare has a regional issue, your site can be affected. Most of the time it works well. But when something breaks, diagnosis can be irritating because you must check the browser, Cloudflare, DNS, and the origin server.
Cost and Control
Let’s Encrypt is free. Many hosting providers include it for free too. It gives strong control to technical users. You can pick server settings, automate renewals, and keep traffic direct.
Cloudflare also has a free plan that is enough for many small websites. Paid plans add more firewall rules, image tools, advanced security, workers, and analytics. The value depends on what you need beyond HTTPS.
If you run a simple brochure site, either option can work. If you run an online store, membership site, SaaS app, or client portal, you should prefer an end-to-end encrypted setup. That usually means Let’s Encrypt on the origin, plus Cloudflare in Full strict mode if you want proxy features.
Common Use Cases
- Shared hosting WordPress site: Use the host’s Let’s Encrypt option. Add Cloudflare only if you want CDN, DNS, or firewall features.
- Small business site with no technical staff: Cloudflare can simplify public HTTPS, but confirm the origin is also secured.
- VPS or dedicated server: Use Let’s Encrypt with Certbot or another ACME client. Add Cloudflare if traffic filtering or caching helps.
- Ecommerce site: Use Let’s Encrypt at the origin and Cloudflare Full strict if Cloudflare is enabled. Avoid Flexible mode.
- API or application backend: Prefer direct server-side TLS with Let’s Encrypt or another trusted certificate authority.
Practical Recommendation
The safest default is Let’s Encrypt on your origin server. It gives you real HTTPS where your site actually lives. It is free, widely trusted, and supported by most hosts.
The best convenience option is Cloudflare with Full strict mode. This gives visitors a secure Cloudflare connection while keeping the origin encrypted too. It also adds caching, DNS management, and useful protection against routine abuse.
Do not treat the two as enemies. In many strong setups, they work together. Let’s Encrypt secures the origin. Cloudflare secures the edge and filters traffic before it reaches your server.
Final Verdict
Choose Let’s Encrypt if you want clean, direct HTTPS with full server control. Choose Cloudflare if you want HTTPS plus CDN, DNS, firewall, and simpler public certificate handling. For business-critical sites, the strongest answer is often both: a valid Let’s Encrypt certificate on the server and Cloudflare set to Full strict.
The browser padlock is only the visible part. The real work is making sure every connection path is encrypted, verified, and renewed before users ever see an error.