What comes after NGINX Ingress in Kubernetes? I compared Traefik, Istio, Kong, Cilium, Pomerium, kgateway and more in terms of architecture, traffic management, security and future-proofing. If you’re trying to decide what’s safe for prod (and what isn’t), this guide is for you.
Detailed review article: <a href="https://www.theinfinity.dev/articles/kubernetes-ingress-gateway-comparison-traefik-istio-kong" target="_blank" rel="noopener nofollow">Kubernetes Ingress &amp; Gateway guide</a>
I co-wrote the article with ChatGPT in a “pair-writing” style. Dropping the shortened prompt I used below 👇
<pre><code class="language-text">You are an experienced DevOps/SRE engineer who also writes about technical topics in a fun but professional way.

Your task:
Write a detailed comparison blog post about Kubernetes Ingress / Gateway solutions, going tool-by-tool. The post should be educational, accurate, and mildly humorous without being annoying.

Tools to compare:
- Traefik
- HAProxy Ingress Controller
- Kong Ingress Controller
- Contour
- Pomerium Ingress Controller
- kgateway
- Istio Ingress Gateway
- Cilium Ingress Controller

General guidelines:
- The entire article must be in Turkish.
- Target audience: intermediate to advanced DevOps / Platform Engineers / SREs.
- Tone: knowledgeable, clear, slightly sarcastic but respectful; high technical accuracy; explain jargon briefly when first introduced.
- Keep paragraphs reasonably short; don’t overwhelm the reader.
- Use light humour occasionally (e.g. “SREs might experience a slight drop in blood pressure when they see this”), but don’t overdo it.
- The post should read like a standalone, “reference-style” guide.

Title:
- Produce a professional but slightly humorous blog title.
- Example of the tone: “Life After NGINX: Traefik, Istio or Kong?” (do NOT reuse this exact title; generate a new one in a similar spirit).

Structure:
Use the following categories as H2 headings. Under each category, create H3 subheadings for each tool and analyse them one by one.

1. Controller Architecture
 - For each tool:
 - How is the architecture structured?
 - Controller design
 - Use of CRDs
 - Sidecars or not
 - Clear separation of data plane / control plane?
 - Provide a brief summary with strengths and weaknesses.

2. Configuration / Annotation Compatibility
 - For each tool:
 - Support level for Ingress / HTTPRoute / Gateway API
 - How easy or hard is migration from the NGINX annotation-heavy world?
 - Config file / CRD complexity
 - Whenever possible, add a small YAML snippet for each tool:
 - e.g. a simple HTTPRoute / Ingress / Gateway definition.
 - Use Markdown code blocks; keep snippets short but meaningful.

3. Protocol &amp; Traffic Support
 - Cover HTTP/1.1, HTTP/2, gRPC, WebSocket, TCP/UDP, mTLS, HTTP/3, etc.
 - Explain which tool supports what natively and where extra configuration is required.

4. Traffic Management &amp; Advanced Routing
 - Canary, blue-green, A/B testing
 - Header-based routing, path-based routing, weight-based routing
 - Emphasize the differences of advanced players like Istio, Kong and Traefik.
 - Include at least one canary deployment YAML example (ideally using Istio, Traefik, Kong or Cilium).

5. Security Features
 - mTLS, JWT validation, OAuth/OIDC integrations
 - WAF integration, rate limiting, IP allow/deny lists
 - Specifically highlight identity/authentication strengths for tools like Pomerium and Kong.
 - Include a simple mTLS or JWT validation YAML example in this section.

6. Observability / Monitoring
 - Prometheus metrics, Grafana dashboard compatibility
 - Access logs, tracing integrations (Jaeger, Tempo, etc.)
 - Comment on which tools are “transparent enough” to win SRE hearts.

7. Performance &amp; Resource Usage
 - Proxy type (L4/L7, Envoy-based, eBPF-based, etc.)
 - Provide a general comparison: in which scenarios is each tool lighter/heavier?
 - If there are publicly known benchmarks, summarize them at a high level (no need for exact numbers or explicit sources, just general tendencies).

8. Installation &amp; Community Support
 - Helm charts, Operators, Gateway API compatibility
 - Documentation quality
 - Community activity, GitHub health, enterprise support (especially for Kong, Istio, Cilium, Traefik).

9. Ecosystem &amp; Compatibility
 - Briefly mention cloud vendor integrations (AKS, EKS, GKE, Huawei CCE, etc.).
 - Compatibility with other CNCF projects (e.g. Istio + Cilium, kgateway + Gateway API, etc.).
 - Plugin / extension support.

10. Future-Proofing / Roadmap
 - Gateway API support and its importance in the ecosystem.
 - The role of these tools in the post–NGINX Ingress EOL world.
 - Which tools look like safer bets for the next 3–5 years? Give reasoned, thoughtful speculation.

Comparison Table:
- At the end of the article, include a comparison table rating each tool from 1 to 5 on the following criteria:
 - Controller Architecture
 - Configuration Simplicity
 - Protocol &amp; Traffic Support
 - Traffic Management / Advanced Routing
 - Security Features
 - Observability
 - Performance &amp; Resource Usage
 - Installation Simplicity
 - Ecosystem &amp; Community
 - Future-Proofing
- Rows = tools, columns = criteria.
- Explain the scale:
 - 1 = “Please don’t try this in prod”
 - 3 = “It works, but you’ll sweat a bit”
 - 5 = “Ship it to prod and don’t look back”
- The scoring is subjective but must be reasonable; add short notes where helpful (e.g. “Istio is powerful but complex”, “Traefik is easy to learn and flexible”).
</code></pre>

Serdarcan Buyukdereli

A comprehensive comparison of Kubernetes ingress and gateway solutions beyond NGINX, evaluating Traefik, Istio, Kong, Cilium, Pomerium, kgateway, HAProxy, and Contour. The guide analyzes each tool across architecture, traffic management, security features, observability, performance, and future-proofing to help DevOps engineers and SREs make informed production decisions. Includes practical YAML examples, a detailed scoring matrix, and insights on Gateway API adoption for long-term infrastructure planning.

Life After NGINX: The New Era of Kubernetes Ingress & Gateways

Really well made article! Thanks so much!