WordPress Agency Switzerland

WordPress & Plugin Development

We don't build standard websites – we build digital business platforms on WordPress. Custom themes, tailor-made plugins, WooCommerce shops, and enterprise architectures. Every line of code is written for your business process.

Book a Free Development Consultation Discover Our WordPress Expertise
61% global CMS market share PHP 8.3+ & WP Coding Standards 100% Swiss Hosting Swiss DPA compliant from Day 1 Custom plugins instead of plugin bloat
ihrefirma.ch
CUSTOM
CHF
API
PHP 8.3+
Gutenberg
REST API
WooCommerce
Why Custom Development

WordPress is the most widely used CMS – and that's exactly the problem. Most websites are interchangeable. We take a different path. Every theme from scratch, every plugin precisely for your business process.

Whether you are an SME from Zurich, an industrial company with complex B2B processes, or a financial institution with the highest security demands: We deliver tailor-made WordPress systems that solve real business problems and generate measurable ROI.

61%
CMS Market Share
0
Template Purchases
100%
Custom Code
95+
Lighthouse Score
The Difference

Standard WordPress vs. Sidora Custom Development

Standard WordPress

  • Pre-made themes with unnecessary code bloat
  • 20+ standard plugins = security risk + slow loading times
  • No custom business logic possible
  • Updates regularly break customizations
  • Generic design without brand identity
  • No or insufficient Swiss DPA compliance

Sidora Custom Development

  • Custom themes: Every line of code has a purpose
  • Tailor-made plugins replace 10+ standard plugins
  • Your business processes mapped directly in the CMS
  • Update-safe architecture through clean separation of core and custom code
  • Unique design that reflects your brand
  • Privacy by Design & Swiss DPA from the first commit

No more plugin chaos and slow loading times

Book a Free Development Consultation
Our Core Services

Three Pillars. One Goal: WordPress as a Digital Business Platform.

We develop WordPress websites from the ground up – without pre-made themes, without unnecessary code. Every project starts with a strategic analysis of your business model and results in a tailor-made solution.

Custom Theme Development

Your WordPress theme from scratch with modern PHP (8.3+), Gutenberg Block Editor or Bricks. Clean, documented code following WP Coding Standards.

Gutenberg Block Development

Tailor-made Gutenberg blocks that give your editors exactly the design options they need – consistency by design.

Multisite & Multilingualism

WordPress Multisite for multiple domains, brands, or language versions (DE, FR, IT, EN) with WPML or Polylang.

Headless WordPress

WordPress as backend, modern frontend (React, Next.js, Vue) for maximum performance and flexible content delivery.

For SMEs

Fast launch (4–8 weeks), transparent fixed prices, intuitive content management. Projects from CHF 10,000.

For Enterprise

Complex system architectures, granular role-permission systems, massive data volumes. WordPress as an enterprise CMS.

Standard plugins create code bloat, impair loading times, and are entry points for security vulnerabilities. Our custom plugins are programmed exactly to your requirements.

B2B Process Automation

Plugins for complex B2B workflows: Request for quotes (RFQ), approval processes, customer-specific price lists, and automated order processing.

Interface Development (API)

Custom integrations with SAP, Microsoft Dynamics, Abacus, Bexio, and other systems via REST API, SOAP, or XML/SFTP.

Data Processing Plugins

Import/export, data preparation, reporting dashboards, and automated processes. From CSV to real-time data synchronization.

Performance Plugins

Custom caching strategies, database optimization, and code minimization. Fewer database queries, faster server response time.

WooCommerce powers about one-third of all online shops worldwide. For Swiss companies, it offers the advantage of seamlessly extending existing WordPress infrastructure with shop features.

Custom WooCommerce Development

Custom shop themes, tailor-made product pages, optimized checkout flows, and custom features for your sales processes.

Swiss Payment & Logistics Integration

TWINT, PostFinance, credit cards, invoice. Logistics integration with Swiss Post, Planzer, and other carriers.

Conversion Rate Optimization

1-click checkout, AI-powered product recommendations, A/B testing, and UX optimization for maximum conversion rates.

B2B WooCommerce

Customer-specific price lists, volume discounts, order on account, approval processes, and role-based catalog views.

Your WordPress Project Deserves Custom Development

Whether theme, plugin, or WooCommerce shop – let's discuss your requirements in a free 30-minute consultation.

Schedule a Development Consultation
Our Process

From Briefing to Launch: Our Structured Development Process

01

Discovery & Analysis

Workshop with your team: Business goals, target audiences, IT landscape. Result: Specifications with wireframes and timeline. (1–2 weeks)

02

Architecture & Prototyping

Data structure, Custom Post Types, plugin architecture. High-fidelity design prototypes with interactive click flows. (1–2 weeks)

03

Development (Iterative)

Agile development in 2-week sprints with weekly demos. Theme, plugin, and interfaces in parallel. (3–8 weeks)

04

QA, Security & Performance

Cross-browser, mobile, WCAG 2.1, security audit, Swiss DPA check, Lighthouse Score 95+, load tests. (1–2 weeks)

05

Launch & Go-Live

SEO checklist, 301 redirects, XML sitemap, Schema.org, DNS migration, SSL, real-time monitoring. (1 week)

06

Maintenance & Further Development

Monthly updates, security monitoring, backups, performance reports, and personal support. (Ongoing)

Maintenance & Support

Proactive Protection for Your Investment

WordPress is a living system: Monthly core updates, plugin updates, and evolving security threats require professional, proactive management.

Basic (SME)

From CHF 59/mo.

Ideal for smaller websites with moderate traffic.

  • Core & plugin updates
  • Automated backups
  • Uptime monitoring
  • Email support
Request Package
Beliebt

Professional

From CHF 190/mo.

For business-critical websites with priority support.

  • Everything in Basic
  • Priority support (4h response time)
  • Monthly performance reports
  • Staging environment
  • 2h development budget/month
Request Package

Enterprise

From CHF 490/mo.

For enterprise projects with the highest demands.

  • Everything in Professional
  • SLA with 99.9% uptime guarantee
  • Quarterly security audits
  • Dedicated account manager
  • 5h development budget/month
  • Emergency hotline
Request Package
Our Stack

Technological Excellence Behind Our WordPress Solutions

Development

PHP 8.3+ WP Coding Standards Gutenberg Block API WP REST API Bricks Builder ACF Pro WP-CLI

Frontend

HTML5 / CSS3 Tailwind CSS JavaScript (ES6+) Alpine.js React / Next.js GSAP & Lottie WebP / AVIF

E-Commerce

WooCommerce TWINT PostFinance Stripe / Payrexx Swiss Post & Planzer

Interfaces & Integration

REST API / GraphQL SOAP / XML / SFTP SAP S/4HANA Microsoft Dynamics 365 Abacus & Bexio HubSpot & Mailchimp

Hosting & Infrastructure

Swiss Datacenter Nginx / Apache MariaDB 10.6+ / MySQL 8.0+ Redis / Memcached CDN & NVMe SSD Imunify360 & WAF

DevOps & QA

Git / GitHub Staging/Production Workflows PHPUnit & Pest Lighthouse CI WP-CLI Deployment
Security & Compliance

Privacy by Design in Every Line of Code

WordPress is the most popular CMS in the world – and therefore a preferred target for automated attacks. Our security strategy goes far beyond standard measures.

Architektur

Our Security Architecture

Minimal plugin usage: Fewer plugins = smaller attack surface
Web Application Firewall (WAF) & DDoS protection
Daily malware scans & automatic cleanup
SSL/TLS encryption & HTTP Security Headers
Regular security audits by independent experts
2FA for all backend access
Compliance

Swiss DPA Compliance

Consent Management Platform (CMP) for DPA-compliant cookie management
Transparent privacy policy with all required information
Privacy by Design & Privacy by Default in every function
Data minimization: Only absolutely necessary data
Technical implementation of the right to information (30 days)
Hosting in Swiss data centers – data stays in Switzerland
Documentation of technical and organizational measures (TOM)
Wichtiger Hinweis

Violations of the Swiss DPA can result in personal fines of up to CHF 250,000. We ensure that your WordPress system is compliant from the start.

Industry Expertise

WordPress for Every Industry — Flexible, Secure, Tailored

Whether finance, healthcare or hospitality — WordPress offers the right ecosystem for every industry. We analyse your sector, understand your processes and select the optimal plugin and theme architecture. The result: a WordPress website that not only excels technically but precisely reflects your industry requirements.

Financial Services & Insurance

Secure WordPress installations with SSL hardening and role-based access for trustees and financial advisors. Plugins for document management and compliance-compliant forms.

Healthcare & Medical Technology

WCAG-compliant WordPress themes and GDPR-safe contact forms for medical practices and clinics. Appointment booking, patient information and multilingual content.

Architecture, Real Estate & Design

Portfolio-optimised WordPress themes with lightbox galleries and project filters for architecture and design studios. Real estate plugins for property management.

Industry, Trade & Export

Multilingual WordPress websites with WooCommerce B2B and catalogue plugins for Swiss industrial companies. ERP interfaces and product configurators.

Public Sector & Education

Accessible WordPress websites for municipalities and educational institutions. Multilingual capabilities via WPML, event calendars and citizen service portals.

Why Sidora AG

Your WordPress Partner in Switzerland

Custom Development Instead of Template Purchases

Every theme, every plugin, every interface is developed from scratch for your project. No code bloat, no compromises.

Local Expertise, Swiss Standards

Personal consulting in Zurich and Winterthur. Hosting in Swiss data centers. Swiss DPA compliance as standard.

Full-Stack Expertise

From PHP to React to SAP interface: We cover the entire stack – frontend, backend, DevOps, SEO, and security.

SEO & GEO from Day 1

Search engine optimization is a core component of every development. We optimize for Google AND for AI search engines with structured data and E-E-A-T signals.

Long-Term Partnership

Proactive maintenance, monthly security monitoring, and a dedicated contact person. We are not just a service provider but your technology partner.

FAQ

Frequently Asked Questions About WordPress Development

Answers to the most important questions about custom WordPress development, plugin programming, and maintenance.

Start Your Tailor-Made WordPress Solution Now

Contact us for a free initial consultation – we analyze your requirements and deliver a concrete solution outline.

Inquire Now – No Obligation
SME projects with a custom theme and standard features start at approximately CHF 10,000. More complex solutions with custom plugins, integrations, and e-commerce features range from CHF 20,000 to CHF 80,000+. Enterprise projects with ERP integration are individually quoted.
Standard plugins create unnecessary code bloat that increases loading times and poses security risks. A tailor-made plugin contains only the code your business process actually needs – faster loading times, smaller attack surface, better Core Web Vitals.
The average development time for a complex plugin is 3 to 6 weeks. Simple feature extensions can be implemented in 1 to 2 weeks.
Yes. We develop tailor-made integrations with SAP S/4HANA, Microsoft Dynamics 365, Abacus, Bexio, and other systems – real-time data synchronization via REST API, SOAP, or XML/SFTP.
Yes – provided it is professionally configured and maintained. Our security architecture includes minimal plugin usage, WAF, daily malware scans, 2FA, and hosting in Swiss data centers. WordPress is used by Bloomberg, Microsoft, and Disney.
Our maintenance packages start at CHF 299/month (Basic), CHF 599/month (Professional with priority support), up to CHF 999/month (Enterprise with SLA and dedicated account manager).
Absolutely. We take over existing WordPress installations, conduct a comprehensive audit, and optimize systematically. In the process, we replace unnecessary standard plugins with custom solutions.
WordPress is the optimal choice in many cases: 61% market share means the largest ecosystem and highest flexibility. For enterprise scenarios, however, we also recommend TYPO3, and for performance-critical projects, Statamic. We advise honestly and platform-neutral.