List of Best

calen

Chat-based calendar assistant on web, Telegram, or email

calen schedules meetings, finds free time slots, and manages your calendar using natural language conversation. Works on the web, Telegram, and email. Free to start.

Free tier

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Screenshot coming soon

Position history

Daily snapshot
Now#1,015 / 9,169AI Tools
Best#1,015Sep 9, 2026
Days in top 200of 1 tracked
Kept by00 likes · in 0 lists

Position of calen among AI Tools on List of Best, recorded once a day. Lower is better.

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Feature
calen
Soniva
PricingFreemiumFree
Free tierYesYes
APINoYes
Open sourceNoYes
PlatformsWebMobile App
ModelsCalenaiSoniva
Context window1M128k
Launched20252023

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Specs

PricingFreemium
Free tierYes
APINo
Open sourceNo
PlatformsWeb
ModelsCalenai
Context window1M
Launched2025