There is no need to switch to a standalone AI browser. Ceres works directly on the page you are viewing. Easily rewrite content with your voice, apply quick suggestions, and stay inside the flow you already opened for real work.
Ceres Browser Sidebar is remarkably easy to use. Add your API key once and start working immediately. From there, Ceres becomes a completely integrated toolkit. You can send context to the sidebar with simple chat buttons, get AI suggestions, and apply actions directly back to the webpage you are viewing—all without breaking your workflow.
Ceres is built around economy and choice. You can add an API key and use whichever AI model fits the task and your budget—from top-tier professional models to extremely cheap, everyday alternatives. This means you only pay for exactly what you use, without being forced into an expensive monthly subscription.
Ceres keeps things straightforward even for visual tasks. You can seamlessly generate or manipulate images directly from the sidebar. Whether you are creating text or refining imagery, everything happens in one fast, accessible panel, ensuring you never have to switch context or navigate through complex menus.
Why type when you can speak? Select any text on a webpage and use your voice to tell Ceres how to rewrite it. It is incredibly fast, highly intuitive, and works directly where your cursor is. This single feature makes everyday editing and replying dramatically faster and easier.
There are many amazing, highly professional AI wrappers and browser extensions out there. They are incredibly powerful, but they often come with steep subscriptions or distracting ads. Ceres targets users who just want something simple, lightweight, and affordable.
We bring the AI to where you are working. If you are replying to an email, writing a description, or filling a form, Ceres sits quietly beside your task. You send context to the AI, and effortlessly inject the response exactly where your cursor is waiting. No complex copy-paste routines and no bloated interfaces.
The result is an ad-free, economically smart extension that delivers snappy AI assistance with minimal friction.
Ceres keeps useful browser-side tools close to the same workflow, so you do not need to bounce between disconnected tabs just to gather context or inspect recent work.
Look outward when the task needs current information instead of guessing from stale context.
Pull useful content from the web directly into the flow when a page already has the reference you need.
Bring documents into the same workspace without breaking the task just to inspect a separate file viewer.
Get quick overview context from recent work when you need to reconnect the current page with what came before.
Many of the extensions available today are incredible, offering advanced professional features—but they often come with expensive yearly subscriptions. Ceres is built for users who prefer a stripped-back, simple, and ad-free assistant that offers exactly what you need with a single, affordable, lifetime license.
| Feature | Ceres | Sider | Gemini in Chrome | MaxAI | Merlin | HARPA AI |
|---|---|---|---|---|---|---|
| Local models | Yes via Ollama/LM Studio | No | No | No | No | Yes via Ollama/LM Studio |
| Search the internet | Yes | Yes | Limited | Yes | Yes | Yes |
| Read current page / URL | Yes | Yes | Yes | Yes | Yes | Yes |
| Direct apply suggestion from sidebar | Yes | No | No | No | No | No |
| Voice command rewrite | Yes | No | No | No | No | No |
| Browser use | No | Under construction | Under construction | No | No | Yes |
| PDF support | Yes | Yes | No | Yes | Yes | Yes |
| Image generation | Yes | Yes | No | Yes | No | Yes |
| API with any provider | Yes | Limited | No | No | No | Yes |
| Free usage | Yes | Yes | Yes | Yes | Yes | Yes |
| Chat with many tabs | Yes | No | Yes | No | No | No |
| Annual cost | €19 lifetime | $120+ / year | $239.88 / year Selected countries |
$144 / year | $228 / year | $144 / year |
Checked on April 12, 2026. Browser-extension workflow only. Some pricing is annualized from public monthly plans.
We probably already support your favorite model, from arena leaders to budget-friendly options that help you spend less.
Ceres is strongest when the work is already happening in the browser. It stays tied to the page, receives context from Chat actions, and helps the user work with content in a direct, interactive way.
The same setup supports flagship, arena leader, and budget-friendly models, and it can also handle search on the internet, URL reading, PDF reading, voice input, and history overview inside the same workflow.