A real workspace
Move beyond a browser sidebar with a standalone web app, native mobile apps and a dedicated place for projects and files.
The Sider AI alternative that does more
Krater is the Sider AI alternative that replaces an extension sidebar with a complete AI workspace.
Sider AI comparison
Sider is a browser-extension-first assistant for reading and writing with GPT, Claude and Gemini. Krater is a standalone web, iOS and Android workspace with 350+ models, frontier image, video and voice tools, Krater Drive and one credit pool.
Krater pricing · AI model directory · AI image generator · You.com alternative
| Category | Sider AI | Krater |
|---|---|---|
| Form factor | Browser extension first | Web, iOS and Android workspace |
| AI models | GPT, Claude and Gemini access | 350+ official, vetted models |
| Image generation | Available, scope varies | Flux, Seedream and more |
| Video and voice | Not publicly specified | Frontier video and ElevenLabs-grade voice |
| Files and projects | Extension-centered workflow | Krater Drive workspace |
| Credits | Extension quotas | One pool, 1,500 credits Pro |
| Pricing | About $8.30/mo on yearly plan | From $20/mo, full suite |
Highlights
More model choice
Use 350+ official, vetted models instead of switching between a smaller set of chat providers inside an extension.
Every modality together
Chat, image, video, voice, code and Krater Drive share one continuous workspace and one credit pool.
Frequently asked questions
What is the best Sider AI alternative?
Krater is a strong Sider AI alternative for people who want a standalone workspace instead of an extension-first assistant, with 350+ models, image, video, voice, code and Krater Drive.
How is Krater different from Sider AI?
Sider centers on a browser sidebar for reading and writing. Krater is a full web and mobile workspace with 350+ models, frontier creative tools and one shared credit pool.
Does Krater include the models Sider users need?
Krater includes GPT, Claude, Gemini and 350+ official, vetted models, plus image, video and voice models in the same workspace.
How much does Krater cost compared with Sider AI?
Krater Pro is $20 per month with 1,500 credits across the full suite. It is positioned around breadth and workspace value rather than a low entry price.