Shortlist by what you need
Start here if you know why you are leaving Krater.
Want the closest match?
i10XMost similar to Krater in what it does, its category and its price.
Visit (opens i10X in a new tab)Need a free plan?
WritingmateHas a free plan, rated 3.9 out of 5. Krater has none.
Visit (opens Writingmate in a new tab)Want to pay less than Krater?
ChatKitFrom $5/mo, against from $16.67/mo for Krater.
Visit (opens ChatKit in a new tab)Want the best rated?
Inner AIRated 4.0 out of 5 in our review, against 3.6 for Krater.
Visit (opens Inner AI in a new tab)
At a glance
Green means better than Krater, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 KraterBaseline | 3.6 | $16.67/mo | No | All-in-one AI workspace that puts ChatGPT, Claude, Gemini and 400+ other models behind one credit-based subscription. | |
| i10X | 3.8+0.2 | $10/mo$6.67 less | YesKrater has none | One subscription covering ChatGPT, Claude, Gemini, Perplexity and 500+ AI tools | vs Krater |
 AI Magicx | 3.8+0.2 | $19/mo$2.33 more | No | AI Magicx bundles 50-plus AI tools, including logo design, image generation, chatbots, and code assistance, into one subscription workspace. | vs Krater |
 GPT Workspace | 3.6Same | $9/mo$7.67 less | YesKrater has none | Third-party AI agent that brings ChatGPT, Claude, Gemini and Grok into Gmail, Docs, Sheets, Slides and Drive, from $9 a month. | vs Krater |
| Writingmate | 3.9+0.3 | $20/mo$3.33 more | YesKrater has none | One subscription covering GPT, Claude, Gemini, Grok, Sora and Veo with files and web search. | vs Krater |
 Prompt Builder | 3.4−0.2 | $9/mo$7.67 less | YesKrater has none | Version history and a library for prompts, across nine model families. | vs Krater |
| Inner AI | 4.0+0.4 | $8/mo$8.67 less | No | Inner AI bundles ChatGPT, Claude, and Gemini into one Brazilian-built assistant for writing, image, and video tasks. | vs Krater |
| ChatKit | 3.4−0.2 | $5/mo$11.67 less | No | A refined ChatGPT interface across OpenAI, Gemini, Azure and custom models - bring your own API key or buy credits at a flat 1:1 rate, with URL context, full chat-history search and Whisper voice input. | vs Krater |
 HaloMate | 3.7+0.1 | $9.9/mo$6.77 less | YesKrater has none | One workspace over GPT, Claude, Gemini and DeepSeek, with separate memory per assistant. | vs Krater |
The alternatives in detail
In order of how closely each one matches Krater.
i10X
3.8$10/mo
vs Krater$6.67 less+0.2Free plan
One subscription covering ChatGPT, Claude, Gemini, Perplexity and 500+ AI tools.
- Access to ChatGPT, Claude, Gemini and Perplexity from one account
- Library of 500+ task-specific AI tools
- Model switching without leaving the workspace
Cheaper than holding four separate frontier model subscriptions
Trails first-party apps on newly released model features
AI Magicx
3.8$19/mo
vs Krater$2.33 more+0.2
AI Magicx bundles 50-plus AI tools, including logo design, image generation, chatbots, and code assistance, into one subscription workspace.
- 50+ AI tools spanning image, text, code, and audio in one workspace
- Multi-model chat access across GPT, Claude, and Gemini
- DeepResearch AI for cited, multi-step research reports
Broad tool coverage can replace several single-purpose subscriptions
No persistent free plan, only a no-card trial
GPT Workspace
3.6$9/mo
vs Krater$7.67 lessSameFree plan
Third-party AI agent that brings ChatGPT, Claude, Gemini and Grok into Gmail, Docs, Sheets, Slides and Drive, from $9 a month.
- An AI agent built into Gmail, Docs, Sheets, Slides and Drive
- Access to GPT, Claude, Gemini and Grok models in one subscription
- Formula writing and data analysis inside Google Sheets
Multiple model providers available from one subscription
Not affiliated with Google despite the close branding, which the FAQ has to clarify
Writingmate
3.9$20/mo
vs Krater$3.33 more+0.3Free plan
One subscription covering GPT, Claude, Gemini, Grok, Sora and Veo with files and web search.
- Access to GPT, Claude, Gemini, Grok, Sora and Veo in one subscription
- Switch models mid-workflow without changing tools
- File upload and web search available across models
Substantially cheaper than multiple separate subscriptions
New provider features can arrive later than in official apps
Prompt Builder
3.4$9/mo
vs Krater$7.67 less−0.2Free plan
Version history and a library for prompts, across nine model families.
- Model-specific prompt generation across nine model families
- Prompt optimiser for existing prompts
- Library with reusable instruction blocks
Version history and reusable blocks, which prompt work badly needs
Paying credits for a model to write a prompt the target model would write free
Inner AI
4.0$8/mo
vs Krater$8.67 less+0.4
Inner AI bundles ChatGPT, Claude, and Gemini into one Brazilian-built assistant for writing, image, and video tasks.
- Single subscription with routed access to ChatGPT, Claude, and Gemini
- Custom AI assistants configurable per task or workflow
- Multimedia generation spanning text, image, and video in one interface
One subscription replaces separate ChatGPT, Claude, and Gemini accounts for casual multi-model use
No permanent free plan -- only a 7-day refund window to trial the product
ChatKit
3.4$5/mo
vs Krater$11.67 less−0.2
A refined ChatGPT interface across OpenAI, Gemini, Azure and custom models - bring your own API key or buy credits at a flat 1:1 rate, with URL context, full chat-history search and Whisper voice input.
- Multi-model support (OpenAI, Gemini, Azure, custom models)
- Bring-your-own-API-key or purchase flat-rate credits
- URL-as-context and full-text chat history search
Flat 1:1 credit pricing avoids the markup many AI chat wrappers add
Requires either an existing API key or purchasing credits - no fully free tier
HaloMate
3.7$9.9/mo
vs Krater$6.77 less+0.1Free plan
One workspace over GPT, Claude, Gemini and DeepSeek, with separate memory per assistant.
- Switch or compare GPT, Claude, Gemini and DeepSeek in one chat
- AI Mates with isolated memory profiles
- Projects bundling files and conversations persistently
Separate memory per assistant, which single-model products still get wrong
Daily credit allocation penalises bursty work
FAQ
Questions people ask
Is Krater free?
Krater does not list a free plan. Paid plans start from $16.67/mo.
What is the best free alternative to Krater?
Writingmate is the highest-rated alternative here with a free plan (3.9 out of 5). Other free options: i10X, HaloMate, GPT Workspace.
What is the cheapest alternative to Krater?
Among paid plans, ChatKit has the lowest starting price (from $5/mo). If you need it free, start with Writingmate.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.