Dev tools · alternatives · 2026
24 alternatives to Someday, Open-Source Calendly Alternative for Gmail / Google App Script
Free and open-source. Simple alternative to cal.com / calendly, built on Google-App-Script for Gmail users. Built with modern technologies like React, TypeScript, Shadcn/UI, and Vite.
Someday is a free, open-source scheduling tool designed for Gmail users as an alternative to Calendly and Cal.com. Built on Google Apps Script, it integrates directly with Gmail to simplify appointment booking and… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Someday, Open-Source Calendly Alternative for Gmail / Google App Script launched in 2024; newer entries below may have overtaken it.
- 1
Schedule meetings without leaving your inbox
2018 · calendly.com · its alternatives →
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Calendly 2.0▲197Easily schedule meetings without the back-and-forth emails
2021 · calendly.com · its alternatives →
- 4
zcal▲481The free Calendly alternative that makes scheduling personal
2021 · zcal.co · its alternatives →
- 5IM
2013 · khamidou.github.io · its alternatives →
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Native iOS & Android App + Browser Extensions for scheduling
Jan 2026 · cal.com · its alternatives →
- 7
Cal.com Platform▲1,601Build your pixel-perfect booking experience with Atoms
2024 · cal.com · its alternatives →
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See your daily schedule and join meetings in one-click.
2021 · manganum.app · its alternatives →
- 10
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Kalendar.work▲336A free fully featured Calendly alternative
Jan 2026 · kalendar.work · its alternatives →
- 13
I love the looks and UX of the Google calendar. But I wanted to have a version I could use more freely in my own projects, still looking similar to the one from Google.
2024 · schedule-x.dev · its alternatives →
- 14
TimeTuna▲372I got inspired to build a scheduling tool that looks gorgeous (thanks to video backgrounds), and recommends you the best 3 time slots using AI as a default (with a full calendar being fall back)
Dec 2025 · timetuna.com · its alternatives →
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Easily find the time that works best for everyone, for free
2021 · calendly.com · its alternatives →
- 18
Scheduling links for iCloud, plus Google, Outlook, Fastmail
2021 · savvycal.com · its alternatives →
- 19
Simplify / Gmail▲255Chrome extension that simplifies Gmail to the bare minimum
2019 · chromewebstore.google.com · its alternatives →
- 20
Meetify▲243Find a time and place to meet. Calendly meets Google Maps.
2025 · meetify.com · its alternatives →
- 21
Your entire meeting lifecycle made easy
2020 · calendly.com · its alternatives →
- 22
Access your links and propose times to meet from anywhere
2022 · savvycal.com · its alternatives →
- 23OS
Hi HN! We’re Aleem, Chris, Borys, Meichen and Zach from Streak (YC S11) and today we’re open sourcing our InboxSDK https://www.inboxsdk.com, which makes it easy to build apps for Gmail. Over 1.8B users spend their days in Gmail! Having your app built into the Gmail workflow is a better user experience and gives you great user retention. InboxSDK gives you a high-level, declarative API to insert your UI into Gmail without having to directly manipulate the DOM yourself. End users install a browser extension to use your app. The SDK can add UI to multiple areas of Gmail. For example,…
2022 · its alternatives →
- 24
A smart calendar with weather forecasts, maps and contacts
2015 · apps.apple.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →