Burn 451 vs Freezetab

Burn 451 is a read-later app that puts saved links on a schedule and turns retained items into a searchable knowledge base. A link begins in Flame for 24 hours; opening it moves it to Spark for 30 days, and users can move it to Vault for permanent retention. The free tier permits five Flame saves per day, 30 Spark items, 100 Vault items and 30 MCP requests per day. Pro costs $4.99 a month and removes limits on Spark items, Vault items and MCP requests. Pro also includes AI summaries and decision cards, voice notes, YouTube transcripts, automatic Vault tagging, full-text search and Markdown export. A 26-tool MCP server can search saved content and manage the queue in Claude, Cursor and Windsurf; the service also offers a REST API. Users can save links through the web app, Chrome extension, iOS share sheet or Safari extension for Mac. The maker describes Burn 451 as a personal tool for triaging unread links rather than maintaining an enduring bookmark archive. The Web Clipper requires a free account to sync saves across devices.

Freezetab saves and organizes links, articles, RSS and Atom feeds, and quotes from websites. Saved articles can be edited in a rich text editor, and content can be highlighted and searched in full text. Filters for time period, tags, sites, and data type help narrow a collection. It is available as a browser extension, on iOS, and on the web; an iOS or iPadOS shortcut can save links and quotes. The free extension supports local use without an internet connection and can be used without logging in, with data kept on the user's machine. Privacy controls let users mark saved data private so it is not sent to Freezetab’s servers, or enable privacy mode for new saves. Freezetab Pro adds cloud backup, syncing across browsers and devices, web access, saving links without the extension, and mobile link saving. Pro costs $2.99 a month after a 7-day free trial. Freezetab says its security measures include HTTPS, firewalls, IP allowlists, VPNs, and encrypted backups. Stripe handles billing information; Freezetab says card numbers and security codes are not stored on its servers.