Professional website design agency in São Paulo

A web design company with a business mindset

Sinnapse is a website design agency in São Paulo that combines business strategy, web design and technology. We are a web company made up of executives with multinational careers, award-winning designers and senior developers. We have delivered more than 500 projects for brands like Nestlé, FC Barcelona, GPTW, CCAA and Espaçolaser, with clients in Brazil and on 3 other continents.

Unlike those who sell a ready-made template, every project starts by understanding your audience, your competitors and what the website needs to deliver: more leads, more sales, more authority or more efficient operations.

Custom web development agency

As a web development company, we handle everything from code to infrastructure. We build corporate websites, B2B websites, landing pages, content portals, client areas, web systems and multilingual international websites.

Our team has experience with PHP, Java, ASP.NET, Drupal, Magento and integrations with CRM, ERP, marketing automation platforms and APIs such as Google Maps, YouTube and Shopify. The result is a website that is fast, stable and ready to grow with your company.

WordPress website agency

We specialize in WordPress website design, the most widely used platform in the world. With Elementor Pro, your team edits copy, images and pages without relying on a developer. We deliver the website with training and take care of updates, security and backups, because an unmaintained WordPress site becomes an entry point for attacks.

Types of website and when to use each one

Corporate website: presents the company, its services and contact channels. It is the foundation for businesses that sell to other companies and need to convey credibility. B2B corporate website: goes beyond the corporate site, with pages by solution, industry and region, downloadable materials and qualified forms for the sales team. Landing page: a single page focused on one campaign or offer, built to convert ad traffic. Online store: catalog, cart, payment and shipping, on WooCommerce or Magento. Portal and multilingual website: large volumes of content, several teams publishing and versions for other countries.

Many companies need a combination: a corporate website as the foundation, landing pages for campaigns and a restricted area for clients or distributors.

Custom website, template or ready-made platform: how to decide

Website builders and ready-made templates solve a simple, short-term need, but they limit the layout, speed and SEO, and the site ends up looking like many others. Custom development starts from your brand and your goals: the layout is exclusive, the code is optimized and the integrations are built around your processes.

For most mid-sized and large companies, the best balance is a custom WordPress website: an exclusive layout, easy editing by your team and a mature ecosystem. When the project involves business rules, systems or high traffic, we move to fully custom development.

How website development works

1. Immersion: we learn your goals, audience and competitors, and analyze your current website. 2. Architecture and content: we define the pages, user journey and keywords. 3. Exclusive layout: a design built for your brand and approved by you. 4. Development: optimized, responsive and secure code. 5. Testing and SEO: speed, structured data, accessibility and analytics set up. 6. Launch and training: the website goes live without losing what you've already earned on Google.

Every stage has a date in the contract, and 100% of our projects have been delivered on time.

Professional website design that gets found on Google

A professional website needs to be found. That's why SEO is built in from the architecture: clean URLs, titles and descriptions crafted for each page, fast loading, a flawless mobile version and structured data for Google and AI-generated answers. When migrating an old website, we preserve URLs and redirects so you don't lose rankings.

Websites ready for AI answers

More and more people search on ChatGPT, Gemini and in Google’s own AI answers. For your company to be cited, the website needs clear, well-organized content, structured data describing the company and its services, consistent information across every page and fast loading. We follow these practices from the architecture stage, alongside traditional SEO.

Redesign: how to replace your website without losing Google rankings

Replacing a website is the riskiest moment for organic traffic. Before launch, we map every page of the current site, keep the URLs that already rank and set up redirects for those that change. Content that brings visits is preserved or improved, and titles, descriptions and structured data are reviewed page by page.

After launch, we monitor Google Search Console, fix crawl errors and track the rankings of the most important keywords until the new site stabilizes.

Security, LGPD and accessibility from day one

A professional website must protect its visitors’ data. We deliver it with an SSL certificate, bot-protected forms, configured security headers, a privacy policy and, when the site uses analytics and advertising tools, cookie consent management, in line with Brazil’s LGPD. For companies that need to go further, Sinnapse has a dedicated website cybersecurity team.

We also follow WCAG accessibility best practices, such as proper contrast, alt text on images and keyboard navigation, so the website works for everyone.

Why hire a specialized web development agency

International experience: projects on 4 continents, with multilingual websites and global standards. Multidisciplinary team: strategy, UX, design, development, SEO and cybersecurity on the same team. UX focus: clear navigation and short paths to contact, turning visits into opportunities. Guarantee in the contract: if the layout doesn't meet your needs, we redo it or refund your investment.

How to choose a web design company

Before hiring, it is worth checking a few points. Portfolio: has the agency delivered projects of your company’s size and industry? Team: who will work on the project, and is the work done by the agency’s own team or outsourced? Ownership: are the domain, the code and the access credentials in your company’s name? SEO and migration: does the proposal include preserving your current Google rankings? After launch: who takes care of hosting, updates, backups and security? Contract: are scope, timeline and investment defined in writing? Reputation: what do Google reviews and current clients say?

How much does a website cost in São Paulo

The cost of a website depends on the number of pages, integrations and features. A corporate website costs far less than a portal with a client area or ERP integration. See our guide how much a website costs. At Sinnapse, you get a proposal with fixed scope, timeline and investment, with no surprises along the way.

After launch: website operations and continuous improvement

A website is not finished on the day it goes live. With Sinnapse’s website operations , we take care of cloud hosting, updates, backups, monitoring and support, and we track results to keep improving the site with new pages, tests and conversion optimization.

Serving São Paulo and all of Brazil

We have offices on Av. Eng. Luís Carlos Berrini, in São Paulo, and in Alphaville, Barueri. We serve companies in São Paulo and the metro area with in-person meetings when needed, and clients across Brazil and abroad remotely, with the same team from start to finish.