Search across files and apps
Constella indexes files and apps so you can ask questions across the contents of your own material instead of searching one source at a time.
Constella
RevendiquerConstella is an AI second brain for searching files, notes, and apps, with local-first storage and source-grounded answers for reading, writing, research, and meeting prep.
Overview
Constella is an AI second brain for indexing files, notes, and connected apps so you can recall information from the context you have already saved. The homepage describes it as an open source product with local AI and on-device storage, designed to turn scattered thoughts into connected works.
Across the site, Constella is positioned as a memory and workflow layer for reading, writing, research, and meeting preparation. It lets you ask questions across your own sources, clip and summarize web content in the browser, and surface reminders or briefs from connected work tools without manually rebuilding context each time.
Features
Source-grounded answers
The product presents citations rooted in the exact sources it uses, which helps ground answers in your own notes and documents.
Connected memory graph
A local-memory model links notes, documents, and related items into a connected graph that surfaces relationships and prior context.
Web clipping and in-page assistance
The Chrome extension clips pages, summarizes what you are reading, and lets you send selections into chat while staying on the page.
Writing support in place
The site describes writing help in Google Docs and similar workflows, where Stella can find supporting ideas, draft text, and keep context nearby.
Briefs and reminders across work tools
The mobile page highlights meeting briefs, reminders, and team digests that pull from tools such as Slack, Gmail, Drive, Calendar, and Messages.
Use Cases
Personal recall across scattered notes
Use Constella as a personal knowledge base when you want to ask questions across notes, files, and saved web content without hunting through folders manually.
Reading and research in the browser
Use the Chrome extension while reading articles, papers, or docs to clip useful passages, summarize what matters, and keep related context attached.
Drafting with nearby context
Use the writing workflow in Google Docs or similar editors when you need supporting points, related notes, or a draft grounded in your own material.
Meeting prep and daily coordination
Use the mobile and team-oriented features to get meeting briefs, reminders, and digests drawn from Slack, Gmail, Calendar, Drive, and Messages.
Heavier multi-app workflows
Use the paid tiers if you need more AI connections, integrations, research agents, or higher credit allowances than the free plan provides.
Pros and Cons
Pros
- Indexes information from files and apps into a connected memory layer.
- Provides citations from the user’s own sources, which helps explain answers.
- Offers a Chrome extension for clipping, summarizing, and recalling while browsing.
- Supports local-first, private on-device storage on the free plan.
- Includes paid tiers with research agents, integrations, and higher usage limits.
Cons
- The available pages do not fully document every supported integration, platform, or workflow detail.
- Paid plans include connection and credit limits, so heavier usage appears to require a higher tier.
FAQ
What is Constella for?
Constella is an AI second brain for indexing files, notes, and connected apps so you can search and ask questions across your own material.
Is Constella private or local?
The site presents Constella as a local-first product with 100% private on-device storage, and the pricing page says the Free plan is on your device with no account needed.
What platforms does Constella support?
The website shows a Chrome extension for clipping, summarizing, and recalling information while you read and write on the web, plus a desktop app and a mobile experience.
Does Constella have paid plans?
The pricing page shows a Free plan, an Ultra plan, and a Mega plan, with paid tiers adding more notes, AI connections, integrations, AI research agents, and AI credits.
Does Constella cite sources in answers?
The homepage emphasizes citations rooted in your sources, and the extension page says answers are grounded in your own knowledge rather than the open web.
Quick Facts
- Category
- AI Second Brain
- Primary platform
- Web app with Chrome extension, desktop app, and mobile experience
- Privacy model
- Local-first and on-device storage
- Pricing
- Free plan plus Ultra and Mega paid plans
- Source domain
- constella.app
- Typical use
- Search, recall, clip, and draft from your own files and connected apps