Last updated 08-11-2026
Category:
Reviews:
Join thousands of AI enthusiasts in the World of AI!
Antispace
Antispace bundles email, calendar, notes, and tasks into one workspace with proactive AI sidekicks. You connect your accounts, pick a character-style assistant, and the system drafts mail, schedules meetings, searches your inbox semantically, and runs web-backed actions without jumping between apps.
Where most email assistants bolt onto Gmail or Outlook alone, Antispace treats mail as one module inside a broader AIOS. Its mail client indexes your inbox for natural-language search, remembers how you prefer to write replies, and supports multiple email accounts in one view. Calendar and notes get the same AI layer, so you can ask cross-tool questions like whether a newsletter is worth keeping.
Freelancers, founders, and knowledge workers drowning in inbox and calendar noise are the target users. The product ships free with CASA Tier 2 certification and routes each task to models including Claude 3.7 Sonnet, GPT-4o mini, Llama 3.3 70B, and Perplexity Sonar based on the job.
Semantic inbox search lets you query mail with natural language from chat
AI sidekick characters handle email, calendar, notes, and todos with distinct personalities
Supports multiple email and calendar accounts in one AI-enhanced interface
Dynamic model routing across Claude 3.7 Sonnet, GPT-4o mini, Llama 3.3 70B, and Perplexity Sonar
Memory-based email writing learns your preferred reply tone over time
CASA Tier 2 certified with a policy that provider data is not used for model training
Combines email, calendar, and notes in one AI workspace instead of separate assistant add-ons.
Free access with no advertising use of data stated on the homepage.
Routes tasks to multiple frontier models rather than locking you to one provider.
Pricing is listed as free for now, which may change as the product matures.
The stored ghostai.co URL is dead; users must sign up at anti.space instead.
Requires connecting email and calendar accounts, which is a bigger trust step than a single-compose tool.
What is Antispace?
Antispace is an AI operating system that combines email, calendar, notes, and task management with proactive AI assistants called sidekicks. It replaces context switching between separate productivity apps with one AI-enhanced workspace.
How much does Antispace cost?
Antispace lists a $0 price on its homepage with no paid tier published. The site states that no user data will be used for advertising. Billing support is available at [email protected].
Which AI models does Antispace use?
Antispace dynamically selects models per task, including Claude 3.7 Sonnet, GPT-o1, GPT-o3 mini, GPT-4o mini, Llama 3.3 70B, Llama 3.1 8B, and Perplexity Sonar or Sonar Pro depending on accuracy and context needs.
Does Antispace replace my email client?
Yes. Antispace includes a full AIOS Mail client with semantic search, memory-based reply drafting, and multi-account support. You connect existing email accounts rather than using a separate inbox app.
What are Antispace AI sidekicks?
Antispace sidekicks are installable AI characters with distinct personalities that handle email, calendar, research notes, and todos. You pick a sidekick that matches how you want work automated.
Is Antispace related to GhostAI?
Antispace is the successor to GhostAI, the earlier email assistant from the same company. The old ghostai.co domain no longer hosts the product; Antispace now lives at anti.space.