Kalendar
100% Free & Open Source The Free Calendly Alternative
Recommended for
- Solo / Indie
- Idea-Stage
- Pre-Seed
- Seed
SSIE
Stage Fit Recommendations
Following data shows why Kalendar is recommended for listed teams. The Fit Score represents the percentage fit of Kalendar to each company stages, as calculated by the SSIE.
Stage
Fit Score
Fit Reasons
Solo / Indie
$0–$2,000 MRR
73- Data encryption at rest and in transit
- Data deletion and right to erasure
- Offers open-source and self-hostable deployment
Idea-Stage
$0
89- Replaces per-seat SaaS with flat-fee ownership model
- Provides a free Calendly alternative with premium features
Pre-Seed
$0–$10k MRR
89- Enables custom branding for booking pages
- Syncs two-way with Google and Outlook calendars
- Sends branded confirmation emails and reminders
Seed
$10k–$100k MRR
73- Supports unlimited event types for meetings
- Allows flexible availability with buffer times and booking windows
- Permits one-click rescheduling and cancellation by attendees
Description
Kalendar is a free and open-source scheduling platform that offers premium features without any costs. It provides custom branding, unlimited event types, and calendar sync, making it a suitable alternative to Calendly. The platform is designed for individuals and businesses looking for a free and efficient scheduling solution.
Save to collection
Paste your product url
Live within 24 hours.
Free. No credit card.
Reviewed by a human. SSIE Fit Scoring.
Explore similar products
Assemble
Organize projects and tasks in a visual timeline for teams.
Calendar & Scheduling•Free Trial+4
Extra
Extra understands what matters to you by summarizing your day, organizing your inbox around your life, surfacing what
Calendar & Scheduling•Free+2
TickTick
TickTick streamlines task management, scheduling, and team collaboration
Calendar & Scheduling•Task Management+1
Microsoft To Do
Microsoft To Do simplifies task management and team collaboration
Calendar & Scheduling•Task Management+1
Pieces
AI-Powered Workflow Memory & Knowledge Management
Task Management•Free+3
OpenVisio
A shared workspace for product teams and AI coding agents to plan, build, review, and ship together.
Task Management•Free Trial+4
Scape
An AI email client that proactively drafts replies and surfaces what matters for professionals.
Calendar & Scheduling•Freemium+4
BaseTab
Transform your new tab into a workspace with widgets, bookmarks, AI chat, and Google integrations.
Task Management•Free+3
Save to collection
Explore similar products
Assemble
Organize projects and tasks in a visual timeline for teams.
Calendar & Scheduling•Free Trial+4
Extra
Extra understands what matters to you by summarizing your day, organizing your inbox around your life, surfacing what
Calendar & Scheduling•Free+2
TickTick
TickTick streamlines task management, scheduling, and team collaboration
Calendar & Scheduling•Task Management+1
Microsoft To Do
Microsoft To Do simplifies task management and team collaboration
Calendar & Scheduling•Task Management+1
Pieces
AI-Powered Workflow Memory & Knowledge Management
Task Management•Free+3
OpenVisio
A shared workspace for product teams and AI coding agents to plan, build, review, and ship together.
Task Management•Free Trial+4
Scape
An AI email client that proactively drafts replies and surfaces what matters for professionals.
Calendar & Scheduling•Freemium+4
BaseTab
Transform your new tab into a workspace with widgets, bookmarks, AI chat, and Google integrations.
Task Management•Free+3