Second
Product overview · September 17, 2026

From a quick capture to useful knowledge

Capture, organize, retrieve, and reuse your knowledge with Second. Features vary by app and connection. Check platform availability or browse each app’s changes.

Capture now, organize later

A readable library
Save public URLs, Markdown, notes, and browser selections. Second keeps canonical Markdown with content revisions, extraction status, and retry controls. Supported sources include articles, YouTube, Reddit, GitHub, and Hacker News; extraction depends on source access and available content.
Inbox first
New captures start in Inbox unless you explicitly choose a destination. Re-saving an active URL can reuse or repair its existing capture; separate Markdown saves remain separate Items.
Original files
Supported save workflows retain original bytes alongside Markdown, with download and export support. Retention, text extraction, and search readiness have separate statuses. Unsupported formats can remain downloadable originals; PDF extraction may be partial.

Give knowledge a home

Projects, Areas, Resources
Organize by what you are doing: project goals and deadlines, ongoing area standards, and reference resources. Nest and reorder destinations, complete projects, and archive inactive work.
Triage with control
Review rule-based and AI filing suggestions before accepting them. Move items individually or in bulk, use keyboard triage, and undo supported actions. Archiving keeps content searchable; permanent deletion is a separate action.
Daily Focus and weekly review
Keep a short Daily Focus list, review Inbox debt and stale projects, and revisit completed work. Enable the weekly email digest and choose review settings when you want an email recap.

Find and use what you saved

Global Search
Search across your workspace with Direct results, semantic AI results, and paginated, typo-tolerant Matches. Narrow the scope with filters and open the captured content rather than relying on the original site.
Source-backed chats
Ask the assistant about your knowledge, reopen conversation history, or start a chat from Search. Search-backed chats pin the eligible matching Items and their revisions; AI-generated Items are excluded unless you include them.
Briefs and Background Work
Turn eligible Search matches into a saved Brief using a template. Generation continues on the server if you close the app, with progress and recovery in Background Work. Sources and provenance stay attached to the result.
Optional AI Profile
Write personalization context, import Markdown as a draft, and choose which version to activate. Edit, deactivate, restore, or delete profile history from Settings.

Bring Second into your workflow

Web and Mac
Use the web dashboard, keyboard shortcuts, theme controls, and command palette. The Apple silicon Mac app adds a local encrypted content store, menu-bar capture, global hotkey, native imports, and optional cloud sync. Connected AI needs a network.
Native capture and agent workspace
On Mac, capture voice and audio, extract screenshot text, import files, and connect Apple Notes with the required permissions. Work in global or contextual agent threads, review proposed actions, and inspect generated artifacts and work that needs attention. The direct-download Mac app does not include the Apple Share extension.
iOS companion
The iPhone and iPad companion includes capture, Inbox, PARA, Search, Assistant, a widget, share sheet, Shortcuts, and on-device dictation and screenshot OCR. Captures queue locally for retry; this is not a complete offline library. See Integrations for distribution status.
Browser, CLI, and note tools
Capture pages, selections, and tab sets with the extension. Script work with the CLI and API, sync a vault with Obsidian, connect Notion, or import Apple Notes on Mac. Each integration has its own content and permission limits.
Connected AI apps
Connect compatible MCP clients with read, save, or organize access to selected destinations or the library. Supported workflows include versioned retrieval, supplied-content saves, original files, organization proposals with history and undo, and handoff context. Host capabilities vary.

Keep control of your account and content

Permissions and sign-in
Use email and password or a registered passkey, manage sessions and API tokens, and inspect connected-app permissions. Narrow or revoke an AI connection in Integrations. Legacy API tokens carry broader access, so share them only with trusted tools.
Portable export
Download a library ZIP with canonical Markdown, retained originals, PARA data, Daily Focus, AI Profile history, and review activity. The manifest identifies missing, corrupt, reference-only, or unfinished material.
Clear data controls
Delete conversations, remove individual Items, reset account data, or delete your account. Onboarding is optional and can be replayed. Cloud sync and AI processing are not end-to-end encrypted; the privacy policy explains where information goes.

What is still ahead

Public Apple App Store distribution, broader AI-host qualification, organization management UI, and dedicated highlighting and distillation surfaces remain separate work. Tags and additional automation integrations are not advertised as available features.