Best Calendar Software - Page 9

How Many Calendar Software Products Does G2 Track?

Total Products under this Category: 153

Category Stats (Sep 2026)

  • Average Rating: 4.46/5 (↑0.01 vs Aug 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: GlossGenius (+4.34%) - Among all products in this category, GlossGenius recorded the largest rating increase compared to last month

Last updated: September 01, 2026

How Does G2 Rank Calendar Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 150,100+ Authentic Reviews
  • 153+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Calendar Software

G2 Grid® for Calendar Software plotting products by satisfaction and market presence

Highlighted products: Google Workspace, Microsoft Outlook, Zoom Workplace, Microsoft 365, Calendly, ClickUp, Zoho Mail, and Reclaim.ai.

Underlying data: [Grid® JSON](https://www.g2.com/categories/calendar-software/grids.json?focus%5B%5D=google-workspace&focus%5B%5D=microsoft-outlook&focus%5B%5D=zoom-workplace&focus%5B%5D=microsoft365&focus%5B%5D=calendly&focus%5B%5D=clickup&focus%5B%5D=zoho-mail&focus%5B%5D=reclaim-ai)

itrezzo

itrezzo provides enterprise software that enhances employee productivity for any company running Microsoft Exchange Server. As one of the first third-party developers for BlackBerry in 2001, itrezzo has a long list of clients ranging from government agencies to large scale enterprise businesses. Companies and agencies using itrezzo profit from the cost-saving and productivity enhancement that comes with the automation of contact and calendar sync to smartphones. Based in San Jose California, itrezzo continues to develop quality software for Microsoft users.

Who Is the Company Behind itrezzo?

  • Seller: CiraApps
  • Year Founded: 2001
  • HQ Location: San Jose, US
  • LinkedIn® Page: www.linkedin.com
    1 employees on LinkedIn®

joynit

Who Is the Company Behind joynit?

  • Seller: joynit
  • Year Founded: 2018
  • HQ Location: Paris, FR
  • LinkedIn® Page: www.linkedin.com
    5 employees on LinkedIn®

Kalender-Sync

Kalender Sync is a GDPR-compliant SaaS for synchronizing calendar availability across providers. Unlike US-based tools that copy entire events (titles, attendees, notes) between calendars, Kalender Sync only transfers Free/Busy slots — your private event details never leave the calendar where you created them. Supported providers: Google Calendar, Microsoft Outlook / Office 365, Apple iCloud (CalDAV), KSuite / Infomaniak (CalDAV), and any iCal feed. Real-time sync via OAuth webhooks (no polling). Hosted at Hetzner in Germany. Data Processing Agreement (DPA / Auftragsverarbeitungsvertrag) available. Built for DACH professionals, freelancers, and small teams who can't compromise on data sovereignty.

Who Is the Company Behind Kalender-Sync?

MechanicX

MechanicX is a cloud-based garage amanagement platform built for UK independent garages and mobile mechanics. It combines bookings and calendars with capacity and estimated-hours workload bars, digital job cards and technician worksheets, plus estimates, invoicing and payments via Stripe and Dojo. With a self-service customer portal for invoices and online payment. DVLA VRM lookup, MOT history and an online MOT booking widget for a garage's own website. With accounting sync to Xero. CE Cert.

Who Is the Company Behind MechanicX?

Nelio Content

Nelio Content is the editorial calendar and content assistant for WordPress. It’s designed to help you to schedule, create, and promote your blog’s content efficiently. Its ultimate goal is to assist you during all the tasks involved in content creation and promotion in social media. Nelio Content doesn’t give you additional work—it’s the perfect companion for running a successful blog and writing outstanding posts saving tons of time. Nelio Content helps more than 6,000 sites stay organized in more than 100 countries around the world.

Who Is the Company Behind Nelio Content?

  • Seller: Nelio
  • Year Founded: 2013
  • HQ Location: Barcelona,
  • Twitter: @NelioSoft
    2,458 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    4 employees on LinkedIn®

OnTime Group Calendar for Microsoft

MS Outlook’s and MS Teams’s Best Calendar Friend. OnTime Group Calendar is the most versatile and powerful scheduling tool available. It comes in 9 languages and supports both Exchange on Premises and M365 users, and includes add-ons such as Mobile, Pollarity (polls and voting system), Catering Manager, Visitor Manager, and a lot of integration in MS Teams. In the wake of the pandemic our customers are asking for OnTime features to support a safe return to the offices and a future that includes hybrid workplaces. Our all new Out of Office Workflow and Shared Desks features are the first deliveries to support this. Multi tenant support is available in OnTime, supporting both on-premises and cloud in one og just merge several tenant users into one collaborative overview.

Who Is the Company Behind OnTime Group Calendar for Microsoft?

Who Uses This Product?

  • Company Size: 100% Small

Parasara Jyotish

Parasara Jyotish is Vedic astrology software that generates birth charts and horoscopes from exact birth details. It creates complete janam kundli charts, including divisional charts from Rāśi (D1) to Ṣaṣṭyāṁśa (D60), and identifies over 300 yogic combinations like Rāja yoga and Dhana yoga. The software supports five dasha systems—Vimśottarī, Nārāyaṇa, Sudāśā, Jaimini Rāśi, and Dṛg dasha—calculated with precise timing. Daily horoscopes use the Moon sign, birth nakshatra, and current dasha, while monthly and yearly predictions include Tithi Praveśa, transit analysis, and Sade Sati. Kundli matching features assess marriage compatibility, Manglik dosha, and spouse destiny. House-by-house analysis covers career, marriage, wealth, health, and spirituality. Using Lahiri ayanāṁśa and ephemeris data, it ensures accurate planetary positions. It generates premium high quality structured astrology report, jyotish qnas.

Who Is the Company Behind Parasara Jyotish?

Neeraja Prakash
NP
Researched and written by Neeraja Prakash
Updated March 6, 2025