Eidos

Eidos is a relational spreadsheet that lives in a single file. Tables, relations, formulas and views are all stored in one standard SQLite database, so the same file can be opened from a desktop application, a browser editor, a command line or by an AI agent without moving the data into a hosted workspace. It suits people who keep structured data in spreadsheets but want relations and more than one way to look at the same records. Ten view types sit over a single record set, among them grid, gallery, kanban, calendar, form, gantt, timeline, chart, map and graph, so changing how work is displayed does not change the data source. The desktop application, Eidos Lite, opens any local folder as a Space. For agent use the vendor ships a command line with structured JSON output, typed write operations that carry an expected revision, and a generated skill file, with the stated rule that agents work through those operations rather than writing raw SQLite. Local use is free and not tied to a subscription. Two hosted services are sold separately. Eidos Sync carries file history across personal computers at $5 per month or $49 billed annually, shown on the site as $4.08 per month, and includes 10 GB of account wide storage. Eidos Publish has a free tier covering 10 active public Markdown pages and 100 MiB of shared storage. Publish Pro costs $9 per month or $90 billed annually, shown as $7.50 per month, and adds 10 GB of storage, files up to 256 MiB, password and private access, 5,000 form responses per month and 30 day version history. A custom Publish Pro tier for larger files and dedicated capacity is quote based, and prepaid credit packs of 10, 50 and 100 can activate eligible service periods.