Varnish HTTP Accelerator - Swiss expertise, maximum performance

Varnish Cache is an open-source HTTP accelerator and reverse proxy designed to sit in front of web servers and cache HTTP responses. When a request arrives, Varnish checks its in-memory cache and serves the response directly if available, bypassing the origin server entirely. This dramatically reduces latency and origin load, often delivering pages in under one millisecond. Varnish uses its own domain-specific language called VCL (Varnish Configuration Language) to give operators fine-grained control over caching rules, request routing, and content manipulation. It is trusted by some of the highest-traffic websites in the world, including major news outlets and streaming platforms.

VSHN provides end-to-end Varnish consulting covering architecture design, VCL development and review, performance optimization, capacity planning, monitoring setup, and team training. We assess your current web delivery infrastructure, recommend an optimal Varnish deployment strategy, and deliver production-ready configurations. Our engineers also provide ongoing advisory services for teams that want expert guidance on caching best practices, cache invalidation strategies, and integration with CDN layers. All consulting engagements include written documentation and knowledge transfer sessions.

VSHN offers tiered support plans for Varnish environments. Our best-effort plan is suitable for development and staging environments. Our production support plans guarantee 99.99% response availability, with critical incidents responded to within one hour around the clock. All SLA commitments are documented in a written service agreement signed before any engagement begins. Support covers Varnish configuration issues, performance degradation, cache invalidation problems, and integration questions with your application stack.

Varnish Cache runs efficiently on modern Linux servers and is optimized for in-memory caching, so fast storage is less critical than available RAM. For cloud deployments, VSHN recommends Swiss providers such as cloudscale.ch or Exoscale for data residency compliance, or international platforms like AWS, Google Cloud, or Microsoft Azure. A typical production Varnish instance requires 4 vCPU and 8 GB RAM minimum, with memory sized according to your working set. VSHN handles architecture sizing as part of every consulting engagement.

While Varnish Cache itself is an in-memory store that regenerates its cache from origin servers, VSHN ensures all Varnish configurations, VCL files, and deployment manifests are version-controlled and backed up. We maintain encrypted off-site backups of all configuration artifacts. Disaster recovery procedures are documented and tested regularly, ensuring a full Varnish environment can be rebuilt and operational within defined recovery time objectives. We also advise on cache warming strategies to minimize the performance impact of a cold cache after recovery.

Yes. VSHN deploys and configures Varnish on Swiss cloud providers by default, including cloudscale.ch and Exoscale, both of which operate data centres exclusively in Switzerland. If data residency is a compliance requirement for your organization, these providers are the recommended choice. We also support AWS (Zurich region), Google Cloud, and Microsoft Azure where Swiss regions are available. Your data sovereignty requirements are documented in the service agreement, and no configuration data ever leaves your chosen region without explicit consent.

Yes. Varnish Cache is fully open source, released under a BSD two-clause licence. This means there are no licence fees, no vendor lock-in, and no restrictions on commercial use. The open-source ecosystem includes a rich library of VMODs (Varnish Modules) that extend functionality for use cases like authentication, geolocation, throttling, and custom logging. VSHN builds exclusively on the open-source Varnish Cache and contributes back to the community. Our consulting ensures you get enterprise-grade reliability from the open-source project without proprietary dependencies.

Yes. VSHN has deep expertise in running Varnish Cache on Kubernetes, including on APPUiO, our Swiss Kubernetes managed platform. We design Varnish deployments as Kubernetes-native workloads with proper health checks, horizontal pod autoscaling, and graceful shutdown handling. The same 99.99% SLA support and 24/7 engineering availability apply to Kubernetes-hosted Varnish environments. Configuration is managed via GitOps workflows, ensuring all VCL changes are version-controlled and auditable.

Contact us using the form below. Tell us about your current web delivery architecture, traffic volume, the challenges you are facing - for example high origin load, slow page delivery, or cache invalidation complexity - and your preferred cloud provider such as cloudscale.ch, Exoscale, AWS, or Google Cloud. We provide a written requirements analysis and cost estimate within one business day. There is no commitment at the scoping stage. Once you decide to proceed, we schedule the consulting engagement to begin within one week of agreement.