Constella is an innovative AI-driven second brain app designed to help users organize, connect, and retrieve information effortlessly. It acts as a visual infinite graph for note-taking, mind mapping, and knowledge management, with features like instant capture, AI-powered search, tagging, task handling, and an intelligent assistant named Stella. Constella ingests data from tools like Notion, Slack, Gmail, Drive, Calendar, and To-Do lists to build a centralized digital brain, enabling quick recall, content generation, automated actions (such as email drafts for refunds or scheduling), and visual organization of ideas for professionals, students, researchers, and anyone managing complex information.
Is Constella Free or Paid?
Constella follows a freemium model. A free tier provides access to core note-taking, basic search, and limited AI interactions (such as a small number of Stella messages per day). Full unlimited features—including unlimited notes, advanced AI capabilities, Stella Chat without restrictions, mobile sync, device synchronization, AI tagging, content generation, and automation—require upgrading to the paid Pro plan. This structure allows casual users to start exploring while supporting heavier knowledge workers with premium access.
Constella Pricing Details
Constella keeps pricing simple and affordable, focusing on a single Pro tier with options for monthly or annual billing.
| Plan Name | Price (Monthly / Yearly) | Main Features | Best For |
|---|---|---|---|
| Free | $0 | Basic note-taking, visual graph, limited Stella messages/day, core search & tagging, limited integrations | Beginners, light users, or those testing the app for personal note organization |
| Pro | $5.99 / ~$50–$60 (annual, often discounted) | Unlimited notes & jotting, unlimited Stella messages, full AI assistant (chat, generation, image/file interaction), mobile app access, device sync, advanced tagging & automation | Professionals, students, researchers, or ADHD/neurodivergent users needing a robust second brain for daily productivity |
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Best Alternatives to Constella
If Constella’s visual graph and AI assistant don’t fully match your needs, several other personal knowledge management (PKM) and second brain tools offer similar or complementary capabilities.
| Alternative Tool Name | Free or Paid | Key Feature | How it Compares to Constella |
|---|---|---|---|
| Notion (with AI) | Free limited + Paid plans | All-in-one workspace with databases, wikis, AI writing & Q&A on pages | More versatile for team collaboration and databases; less visual graph focus and AI assistant depth than Constella’s Stella |
| Obsidian | Free (plugins paid optional) | Local markdown files, bi-directional linking, graph view, extensive plugins | Highly customizable and offline-first; stronger linking but requires more setup and lacks built-in AI like Constella’s Stella |
| Fabric.so | Free limited + Paid | AI-enhanced bookmarks, webpage previews, knowledge capture from web/content | Excellent for web clipping and reliable previews; more web-focused than Constella’s broad app integrations and visual infinite graph |
| Mem | Free limited + Paid | AI-powered notes, auto-organization, chat with your knowledge base | Strong AI retrieval and writing assistance; cleaner interface but less emphasis on visual mind mapping compared to Constella |
| Reflect | Paid | Networked notes, backlinks, daily notes, AI prompts, calendar integration | Sleek and fast with good AI features; more minimalist journaling style, fewer automation actions than Constella |
Pros and Cons of Constella
- Pros:
- Unique visual infinite graph makes connecting ideas intuitive and engaging for visual thinkers.
- Powerful AI assistant (Stella) enables chatting with notes, generating content, searching effortlessly, and handling images/files.
- Seamless integrations with productivity apps (Gmail, Notion, Slack, etc.) to centralize your digital life.
- Affordable Pro pricing with unlimited access unlocks full potential without high costs.
- Helpful for ADHD/neurodivergent users, students, and professionals through quick capture, tagging, and automation.
- Cons:
- Free tier limits on Stella messages and features may feel restrictive for regular use.
- Still emerging tool, so third-party integrations and ecosystem may not be as mature as established apps like Notion.
- Visual graph can become overwhelming with very large knowledge bases without strong organization habits.
- Some users report needing time to adapt to the interface and AI workflow.
- Pricing details occasionally vary or aren’t fully transparent on all pages, requiring check on the official site.