Products

Cal.rs

Scheduling that respects your stack

cal.rs Source★ 350AGPL-3.0Productivity & Collaboration / Calendars & Scheduling

AI Benchmark
Desktop
Mobile
Monthly visits
<5K
Oct 2026
Public revenue
Undisclosed
No public revenue evidence yet
Entry price
Free
No monthly subscription pricing
Creators
Olivier Lambert
@vatesfr· 1,227 followers
Launched
Unknown
No public launch record

Traffic

Last 12 months
Monthly visitsData through Oct 2026

Marketing moves

Launches, search & content, referrals, promotions
X accounts@vatesfr

No launch, search, referral, or promotion moves recorded for this product yet.

Third-party reviews & case dossiers

Acquisition breakdowns, engineer reviews & open-source metrics
selfh.st★ 350 Stars · 61 ForksAGPL-3.0Rust
2026-03-09Source
Replaces / alternatives to:
Google Calendar

Scheduling platform built in Rust

Open Source & Agent Ecosystem

GitHub · MCP / Skill
olivierlambert/calrsSelf-hostable
Last commit 2026-11-09
GitHub Stars
★ 350
Forks
61
License
AGPL-3.0
Primary language
Rust
Open-source alternative to:Google CalendarBrowse peer open-source projects →

Agent, MCP & Developer Integration

CLI / SDK
Integration docs
Ecosystem & integrations:
NextcloudBlueMindFastmailICloudGoogle CalendarMicrosoft ExchangeTwilioGatewayAPISeven.ioJitsi
Exposed tool capabilities:
Appointment SchedulingTimezone CoordinationDefine bookable meetingsShare a linkManage everything headlessEmbed on any website
Browse developer & CLI tools →

Traffic sources

Oct 2026

Traffic breakdown

Channels

No data yet

Countries

No data yet

Search

Domain authority —Domain registered Unknown

KeywordMonthly volume
google caldav username20
cal.rs—
cal;rs—

Traffic data: Vaneform

Pricing

Public pricing: Open Source (AGPL-3.0)Raw source text; structured plans are extracted after website capture.

Pages & changes

Tracked since 2026-11-04

Key pages

Weekly snapshots
Home
cal.rs/ Snapshot 2026-11-09

Changes

No pricing, plan, or positioning changes detected since tracking started.

Questions & evidence

How much website traffic does Cal.rs get?
Vaneform estimates <5K website visits in 2026-10. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
What is Cal.rs and what platforms does it support?
Cal.rs is catalogued under Calendars & Scheduling: Scheduling that respects your stack. Supported platforms: CLI / SDK.
Is Cal.rs open source?
Cal.rs has a public repository (https://github.com/olivierlambert/calrs) under the AGPL-3.0 license, recording 350 GitHub stars, and supporting self-hosted deployment.Source

Related products in this category

Productivity & Collaboration / Calendars & Scheduling

These products share a catalog category. Compare customer tasks, features and deployment requirements before treating them as alternatives.