Oxygen vs SITE123
Oxygen
oxygenbuilder.com
SITE123
site123.comSide by side
| Figure | Oxygen | SITE123 |
|---|---|---|
| Price from | Free | $0.90/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 5 | 7 |
| Spec score · Small Business Website Builders | 9.2 (#5) | 8.8 (#16) |
| Blogging | Yes | SITE123 includes blog templates, scheduled posts, RSS, comments and comment replies. |
| Contact forms | Yes | Yes |
| Free plan | No | Yes |
| Product | Oxygen is a visual website builder for WordPress that can be used by hand or driven by an AI agent. | SITE123 is a hosted website builder using ready-made layouts for users without coding or design experience. |
| Rating on G2 | 4.3 out of 5 from 28 reviews. | 4.3 out of 5 from 12 reviews |
| Rating on Trustpilot | 3.1 out of 5 from 6 reviews. | 3.8 out of 5 from 9,150 reviews |
| Support | Support requests can be submitted by form or email, with a stated response time of 24–48 hours Monday to Friday. | SITE123 advertises 24/7 live support and a searchable support center. |
Plans
Oxygen
- Basic$129, paid once
- WooCommerce$149, paid once
- Ultimate$179, paid once
- Free OxygenFree
- Lifetime License$199.50, paid once
SITE123
- FreeFree
- FreeFree
- Basic$10.80 a year
- Premium$10.80 a month
- AdvancedPrice not published
- GoldPrice not published
- ProfessionalPrice not published
In their own words
Oxygen
Oxygen is a visual website builder for WordPress that works through manual editing or compatible AI agents. It installs as a plugin on an existing WordPress site, including local, staging, or live installations; a hosted demo is also available. The editor provides controls for Flexbox, CSS Grid, responsive breakpoints, semantic HTML, and HTML, CSS, JavaScript, and PHP code blocks. Reusable components, CSS variables, selectors, and JSON export for design tokens support design-system work. Dynamic fields, conditions, and query loops can use ACF, Meta Box, and ACPT content. Oxygen's Agent Connector, MCP server, and Abilities API support agents such as Claude, Codex, Cursor, and OpenCode, which can build pages, content types, templates, plugins, and content. The complete editor and AI tooling are free to try through a plugin, local setup, or hosted demo; the demo expires after four hours. AI credits are not sold by Oxygen, so users bring an agent under the vendor's own plan. Listed lifetime-billed plans include Basic at $129 a month, WooCommerce at $149 a month, and Ultimate at $179 a month. A separate lifetime license is $199.50 as a one-time purchase.
SITE123
SITE123 is a web-based website builder for small businesses, using pre-designed layouts and structures rather than a drag-and-drop interface. It includes hosting and supports custom domains, contact forms, SEO controls, blogging, booking tools, multilingual sites, and basic e-commerce. Online sales and an integrated booking system cover products and services, while the App Market lists connections such as Google Analytics 4, Google Search Console, LiveChat, PayPal, Stripe, and Braintree. Websites use responsive design for desktops, smartphones, and tablets. SSL/HTTPS is built into every website, and the privacy policy describes encryption, access controls, monitoring, logical separation, and backups. The free plan costs nothing, billed $0 /Month, with 250 MB storage, 250 MB bandwidth, and a subdomain; it does not include a custom domain. Paid plans start at $10.80/mo (annual). Basic, Advanced, Professional, and Gold plans are listed, but their prices are not provided. Email accounts are listed with Advanced and Professional plans. Code export is unavailable, and free 24/7 live chat support is advertised.