Caddy’s 2026 automatic HTTPS adoption vs Nginx myths

Caddy beats Nginx in small-file throughput

Caddy 2.11.2 delivers 142,000 requests per second for 1KB static files on 16-core ARM hardware. This result exceeds the 116,000 requests per second that Nginx 1.26 achieves on the same hardware. Nginx still holds a 32.8% market share according to April 2026 data. Caddy uses 25 to 35 MB of RAM at idle, while Nginx consumes only 2 to 3 MB. If you handle files larger than 1 MB, Nginx pulls 17% ahead in performance. I find that the 22% throughput advantage Caddy shows in small-file tests often outweighs the memory difference for most modern cloud applications. In a benchmark by the Art of CTO in June 2026, Caddy handled 230,619 requests while a tuned Nginx handled 326,510 requests. Nginx uses 38% less memory during 1 GB+ streaming workloads. Nginx was engineered to solve the C10K problem and handles ten thousand concurrent connections on a single box. F5 Networks acquired Nginx Inc. in 2019 for $670 million. Nginx 1.31.5 released in September 2026 with a new control API and the ngx_http_json_module. Can a team justify the extra 30 MB of RAM to gain that speed?

HTTPS automation reduces operational work

Caddy automates the entire certificate lifecycle. It uses the ACMEv2 API to interact with Let’s Encrypt or ZeroSSL. This removes the need for manual certificate issuance, renewal monitoring, or managing certificate file paths. Nginx does not include this automation as a default behavior. Caddy provides a working HTTPS reverse proxy with only two lines of configuration, while an Nginx setup requires installing the software, creating server blocks, configuring proxy_pass, and managing certificate tooling like Certbot. You know that certificate expiration causes downtime, so Caddy removes that specific operational risk. Nginx requires more work because it exposes the machinery directly. I find Nginx configuration more transparent for experienced users who prefer explicit control. Caddy’s compiled binary is around 45 MB because it statically links its runtime, its garbage collector, and its entire standard library, which includes the TLS stack and the HTTP/3 implementation. Nginx has shipped 47 CVEs since 2020, while Caddy has shipped 4 over the same window. Caddy also pioneered On-Demand TLS to obtain certificates during the first TLS handshake.

Choosing the right proxy for your team

I recommend Caddy for new projects, small teams, and MVPs. It works well for internal tools and single-VM application stacks. Caddy is a good choice when you want to reduce certificate-management work or have a small team with no dedicated DevOps engineer. Nginx is the better choice for existing production environments or teams with deep Nginx expertise. I suggest Nginx when you have complex routing, legacy infrastructure, or need detailed edge behavior. Nginx supports load balancing methods like round robin, least connections, and IP hash. Caddy supports upstreams, retries, and active or passive health checks. If your team operates a mature Nginx estate with existing templates and automation, switching to Caddy just because it is simpler may not be worth the migration and maintenance cost. Nginx remains a strong choice for multiple upstream pools, static file serving, and advanced caching. Nginx is the right choice if your deployment scripts expect it or your team already has strong certificate automation.