What is WordPress?
WordPress is free, open-source software for building and managing websites. It is a content management system, the category of tools that let you edit pages without touching code.
It is written in the PHP programming language, stores your content in a MySQL or MariaDB database, and is released under the GPL licence, which means anyone may use, study, change and share it. You install it on a web server, log in to a dashboard, and add pages, posts, images and products from there.
It is by far the most widely used system of its kind. At the time of writing, W3Techs reports WordPress running on 40.2% of all websites it surveys, and 58.7% of sites whose content management system it can identify. That scale matters to a business owner for one practical reason: it is easy to find developers, themes, plugins and answers when something goes wrong.
WordPress.org and WordPress.com are not the same thing
The name covers two different things, and quotes from agencies and freelancers do not always say which they mean. WordPress.org is the home of the free software; you download it and run it on hosting you choose. WordPress.com is a commercial hosting service built on that software, run by the company Automattic, where you pay a plan fee and the company handles the server.
When a Bangkok agency, including us, says it builds "a WordPress website", it almost always means self-hosted WordPress.org. Ask to be sure, because the difference decides who controls your plugins, your data and your ability to move.
| WordPress.org (self-hosted) | WordPress.com (hosted service) | |
|---|---|---|
| What it is | Free software you install | A paid hosting service running the software |
| Hosting | You choose and pay a host | Included in the plan |
| Themes and plugins | Any you like, including custom ones | Not on the free plan; paid plans allow them at the time of writing |
| Moving elsewhere | Copy the files and database | Export tools, with some limits |
| Who maintains it | You or your developer | The service handles the server |
Is WordPress the backend or the front end?
Both, in a normal setup. The backend is the part you log in to: the admin dashboard, the database that holds your pages, and the PHP code that manages users, media and settings. The front end is what visitors see. WordPress produces it too, through the active theme, which takes your content from the database and turns it into HTML pages in the browser.
So when you edit your opening hours in the dashboard, the backend saves the change, and the theme shows it on the front end the next time someone loads the page. One system does both jobs, which is why a single developer can build and maintain a whole site.
There is an exception. In a "headless" setup, WordPress is used only as the backend for editing content, and a separate application built with another technology draws the front end. It suits large publishers and complex apps, and it costs more to build and run. Our article on headless WordPress explained for business owners covers when it is worth it; for most company websites it is not.
Themes, plugins and the block editor
Three pieces explain most of how WordPress behaves day to day.
Themes decide how it looks
A theme is a set of templates and styles that controls the design of every page. You can install a ready-made theme, buy a premium one, or have a custom theme written for your brand. Changing the theme changes the look without deleting your content, although layouts often need rework.
Plugins add features
A plugin is an add-on that gives WordPress a new ability: a contact form, an online shop, a cookie banner, a booking calendar. Tens of thousands are listed in the free WordPress.org directory, and quality varies widely. A business site should run a short list of well-maintained ones; our guide to essential WordPress plugins for business sites names the jobs worth covering.
The block editor is where you write
Pages and posts are built from blocks: a paragraph, a heading, an image, a button. You stack them in the editor and see roughly how the page will look. Staff who can use a word processor usually learn it within an hour or two.
For larger bilingual projects, WordPress also has an advanced mode that runs several sites from one installation; our note on WordPress Multisite for Thai-English websites explains when that structure makes sense.
What businesses build with WordPress
WordPress started as blogging software, but most business use today has little to do with blogs. Typical projects in Bangkok look like this:
- Company and service sites: law firms, accountants, clinics, schools and B2B suppliers with service pages, team pages and enquiry forms.
- Hotels, restaurants and venues: room or menu pages (see our notes on restaurant website design), galleries, maps and booking or reservation forms.
- Online shops: with the WooCommerce plugin, WordPress becomes a store that can take PromptPay and card payments and connect to Thai couriers such as KEX Express (formerly Kerry Express) or Flash Express through further plugins.
- Bilingual sites: Thai and English versions of each page, with a language switcher, using a translation plugin or a multisite setup.
- Content-led sites: blogs, guides and resource libraries where regular publishing matters.
Thai businesses have a few local points to weigh, such as Thai fonts, hosting location and PDPA consent. We cover those in a separate post on WordPress in Thailand.
Strengths and weaknesses, honestly
Where WordPress is strong
- Ownership. The software is yours to run anywhere. If you fall out with your developer or host, you can take the files and database elsewhere.
- Flexibility. From a five-page site to a shop with thousands of products, the same system scales with plugins and custom code.
- A large talent pool. You are never tied to one agency, in Thailand or abroad.
- Thai language support. A Thai translation of the dashboard is maintained at th.wordpress.org, and Thai content works fine with a suitable font.
Where it lets people down
- Updates never stop. Core, theme and plugins all need regular updates. Skip them and problems pile up.
- Plugin quality varies. A poorly written or abandoned plugin can slow the site or open a security hole.
- Neglected sites get hacked. Patchstack's yearly security reports find that the great majority of newly reported WordPress vulnerabilities sit in plugins and themes, not in the core software. Outdated plugins and weak passwords are the usual way in, and missing backups turn a hack into a disaster.
- Page builder bloat. Drag-and-drop builders make editing easy but often produce heavy, slow pages. That is why we build custom themes with no page builder.
What WordPress costs to run
The software is free, but a working business site has five cost components, which our guide to WordPress pricing explained covers in more depth:
- Domain name: a yearly renewal for your .com or .co.th.
- Hosting: a yearly or monthly fee, higher for managed WordPress hosting and busy shops.
- Premium themes and plugins: optional, often sold as yearly licences.
- Development: the one-time cost of design and build, which is usually the largest single item.
- Maintenance: updates, backups, monitoring and small content changes after launch.
For development, our Starter package starts from THB 10,000 for up to five pages, and the Business package from THB 30,000 for up to fifteen pages in English and Thai on a custom theme. Both are indicative one-time prices; the final figure is in your written quote. Maintenance after launch is priced per site on request. The full breakdown sits on our page about WordPress website cost in Bangkok.
Where to go from here
If WordPress sounds right but you are still comparing platforms, our guide to build a website step by step sets it against site builders and Shopify. If you have decided and want to try it yourself, the ten-step WordPress how-to for building a website goes from domain to launch.
And if you would rather have it built properly the first time, with a custom theme, Thai and English content and PDPA consent in place, see our custom WordPress development service.
Who reviewed this guide
Who builds your site
Litesh Dhir
Builds and ranks the websites: the systems behind the 17 client sites whose Search Console numbers we publish.
More about usMore WordPress guides
Sources
- WordPress.org: About WordPress
- WordPress.org: GPL licence
- W3Techs: Usage statistics and market share of WordPress
- WordPress in Thai (th.wordpress.org)
- WordPress.org plugin directory
- Patchstack: State of WordPress Security in 2026
- WordPress.com: Plans and pricing