Calisto Sheets

Spreadsheet editor with formula engine and four AI endpoints.

Browser-based spreadsheet editor powered by Univer. Cells, formulas, functions, and charts with a full calculation engine. Four AI capabilities — formula generation from natural language, column classification, smart fill, and data query. Five smart views. XLSX, CSV, and PDF export. Real-time collaboration with presence avatars. Version history with changelog.

Univer Engine · Formula Calculation · 4 AI Endpoints · 5 Smart Views · XLSX/CSV/PDF Export · Real-Time Collaboration

The Editor

Cells. Formulas. Functions. Charts. Canvas-rendered grid.

Univer-powered spreadsheet engine with client-side canvas rendering. Full formula calculation engine with autocomplete. JSON workbook snapshots with sheets, cellData, rowCount, and columnCount. Default workbook: 1 sheet, 100 rows, 26 columns. Autosave.

Univer Spreadsheet Engine

Canvas-rendered grid. Formula engine. Real-time collaboration.

Browser-based spreadsheet editor powered by Univer.js with client-side canvas rendering. Full formula calculation engine with autocomplete. Real-time collaboration with avatar presence. JSON workbook snapshots stored in Depot. No download or installation.

Cell Grid

Canvas-rendered spreadsheet grid. Cell selection, range selection, multi-sheet workbooks. Default: 1 sheet, 100 rows, 26 columns.

Formula Engine

Full formula calculation engine via @univerjs/engine-formula. Autocomplete for function names and cell references. Excel-compatible syntax.

Charts

Chart creation from selected data ranges. Rendered within the spreadsheet workbook.

Cell Formatting

Bold, italic, font size, font color, background color, borders, alignment. Number formatting for currency, percentages, dates.

Real-Time Collaboration

Live multi-user editing via useEditorCollab hook. Avatar presence dots showing active collaborators (up to 5+n).

Autosave & Storage

JSON workbook snapshots stored in Depot. Autosave on every edit. Presigned download URLs with 300-second TTL.

Smart Views

Recent. My Spreadsheets. Shared with Me. Starred. Trash.

Five smart views replace the traditional file browser. Each view backed by /api/sheets/views with star, share, and trash row-actions. The same docs-parity pattern across Docs, Sheets, and Slides.

Five Smart Views

Recent. My Spreadsheets. Shared with Me. Starred. Trash.

Five smart views replace the traditional file browser. Each view backed by /api/sheets/views with star, share, and trash row-actions. The same docs-parity pattern across Docs, Sheets, and Slides.

Recent

Recently edited spreadsheets. Sorted by last-modified date.

My Spreadsheets

Owner-scoped spreadsheets. Files you created.

Shared with Me

Spreadsheets shared by other users via editor_file_shares grants. View or edit permission per share.

Starred

Spreadsheets flagged via per-user editor_file_stars. Persists across sessions.

Trash

Soft-deleted spreadsheets. Restore, permanent delete, or empty trash. Owner-scoped.

Create, Import & Templates

Blank spreadsheet. XLSX and CSV import. AI creation. Templates.

Four creation paths — blank spreadsheet, XLSX/XLS/CSV file import (up to 50 MB), AI auto-create from a prompt, and new from template. Account-level template library.

Create & Import

Four creation paths. XLSX, XLS, and CSV import up to 50 MB.

Blank spreadsheet, file import (XLSX/XLS/CSV), AI auto-create from a prompt, or new from template. Account-level template library with create-from-existing.

Blank Spreadsheet

Create a new blank workbook. Default: 1 sheet, 100 rows, 26 columns. The editor opens immediately with autosave.

XLSX / CSV Import

Upload XLSX, XLS, or CSV files up to 50 MB. Stored in Depot, rendered via the Univer client-side importer.

AI Auto-Create

AI-powered spreadsheet generation from a natural language prompt. Describe the spreadsheet and the workbook populates with structure and sample data.

Template Library

Account-level spreadsheet templates. Browse the gallery, select a template, and a new workbook opens with the template structure. Create templates from existing spreadsheets.

AI Capabilities

Formula generation. Column classification. Smart fill. Data query.

Four AI endpoints on one spreadsheet surface. Generate formulas from natural language. Auto-detect column types from sample data. Auto-complete partially filled columns by pattern. Ask natural language questions about spreadsheet data. Plus AI-powered content search and summary generation.

Six AI Endpoints

Formula generation. Column classification. Smart fill. Data query. Search. Summary.

Six AI-powered endpoints on one spreadsheet surface. Generate formulas from plain English. Auto-detect column types on import. Auto-complete columns by pattern. Ask natural language questions about data. AI-indexed content search across workbooks. Auto-generated data summaries.

Formula Generation

Natural language to Excel-compatible formula syntax. Describe what you need in plain English, receive the formula with a one-sentence explanation. POST /api/sheets/ai/formula.

Column Classification

Auto-detect column types from sample data — date, currency, email, phone, number, text, and five more. Eleven recognized types. Formatting applied on import. POST /api/sheets/ai/classify.

Smart Fill

Auto-complete partially filled columns by pattern recognition. Dates, names, sequences, and custom patterns. Up to 100 values per request. POST /api/sheets/ai/fill.

Data Query

Natural language questions about spreadsheet data. Multi-step analysis pipeline. Returns an answer plus an optional formula. POST /api/sheets/ai/query.

Content Search

AI-powered search indexing across spreadsheet content via createSheetsSearchHandler. Full-text search across all workbooks. POST /api/sheets/search.

Summary

AI-generated summary of spreadsheet data. Key metrics, distributions, and patterns extracted from the workbook. POST /api/sheets/summary.

Export, Versioning & Sharing

XLSX. CSV. PDF. Version history. Real-time collaboration. Sharing.

Client-side export to XLSX and CSV via Univer. Server-side PDF export with multi-sheet support, column widths, and page numbers. Version history with per-save snapshots. Real-time collaboration with avatar presence. Sharing with view and edit permissions. Brand check via Ethos. Account theming.

Export, Versioning & Sharing

XLSX, CSV, and PDF export. Version history. Real-time collaboration. Sharing.

Client-side export to XLSX and CSV. Server-side PDF export with multi-sheet support and page numbers. Version history with changelog per save. Real-time collaboration with avatar presence. Sharing with view or edit permissions. Brand check via Ethos. Per-account theming.

XLSX Export

Client-side export to .xlsx format via the Univer exporter.

CSV Export

Client-side export to .csv format via the Univer exporter.

PDF Export

Server-side PDF generation with multi-sheet support. Column widths, header row styling, alternating row backgrounds, and page numbers.

Version History

Per-save snapshots with monotonically increasing version numbers. Changelog text, size in bytes, and Univer format version per record. HEAD always points to the latest.

Real-Time Collaboration

Live multi-user editing with useEditorCollab hook. Avatar presence dots showing active collaborators.

Sharing

Share spreadsheets with email recipients. Granular permissions — view or edit per recipient. Notifications sent on share.

Brand Check

Ethos Integrity integration. Scans text content in spreadsheet cells against account brand guidelines.

Account Theme

Per-account theming with template name and primary color. Brand kit fallback. Applied via SheetsThemeWrapper.

Settings

Account-level spreadsheet preferences.

Everything. One Price.

Univer engine. Formula calculation. Six AI endpoints. Smart views. Triple export. Nothing extra.

Univer Engine
Canvas-rendered spreadsheet grid. Cells, formulas, functions, charts. Autosave.
Formula Engine
Full calculation engine with autocomplete. Excel-compatible syntax.
Real-Time Collaboration
Live multi-user editing. Avatar presence dots.
5 Smart Views
Recent, My Spreadsheets, Shared with Me, Starred, Trash.
XLSX/CSV Import
Upload XLSX, XLS, or CSV up to 50 MB.
AI Auto-Create
Generate spreadsheets from natural language prompts.
Templates
Account-level spreadsheet template library.
AI Formula Gen
Natural language to Excel-compatible formula with explanation.
Column Classification
Auto-detect 11 column types from sample data.
Smart Fill
Auto-complete columns by pattern recognition. Up to 100 values.
Data Query
Natural language questions answered from spreadsheet data.
AI Search & Summary
AI-indexed content search. Auto-generated data summaries.
XLSX/CSV/PDF Export
Client-side XLSX and CSV. Server-side PDF with multi-sheet support.
Version History
Per-save snapshots with changelog and version metadata.
Sharing
Share with view or edit permissions. Email notifications.
Brand Check & Theme
Ethos brand compliance. Per-account theming with primary color.
Pricing

High-Performance Ops. Zero Monthly Overhead.

Get all 15 Core modules at no monthly cost. You only pay 2% of processed revenue.

Calisto Core
$0/month
+ 2% of revenue
CommitmentNone
UsersUnlimited
Products15 included
Best for: Businesses of any size. Revenue is auto-calculated from POS orders, reservations, folios, and event tickets.
Calisto Sheets

Spreadsheet editor with formula engine, four AI endpoints, smart views, and real-time collaboration.

$1.00/mo

Part of Work Suite

Billed monthly to your Pro Shop wallet

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