ProtonMail
Tutanota
Zoho Mail
Gmail
FastMail
Microsoft Outlook
Thunderbird
ProtonVPN
SYNCDATE
OneCal.io
Calensync
ChronoLink
SyncThemCalendars
Multical
CalendarBridge
SyncGene
SYNCDATE is a web application for live two-way Google Calendar synchronization. Connect multiple Google accounts, select which calendars to sync, choose direction (one-way or two-way), and SYNCDATE keeps events aligned automatically in the background.
Built for professionals juggling multiple Google calendars across work, personal, and side-project accounts.
Outlook support with cross-provider sync - coming soon.
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SYNCDATE's answer:
SYNCDATE treats sync as silent infrastructure โ it shows proof instead of making promises. Every sync run is logged with stats, every error comes with a deterministic fix step, and every sync can be cleanly reversed with optional event cleanup. Most calendar sync tools are black boxes. SYNCDATE exposes sync health, freshness, and latency so you can verify it's working in seconds, not just hope it is.
SYNCDATE's answer:
A generous free-forever tier (2 accounts, 2 calendars) covers the most common use case at zero cost โ competitors start at $4โ12/mo. Privacy is the default: synced events show as "busy" unless you opt in to detailed copying. And if you ever want to stop, the Clean Exit flow removes all SYNCDATE-created events from your calendars โ no orphaned copies left behind.
SYNCDATE's answer:
SYNCDATE's answer:
SYNCDATE was born from a real problem: juggling multiple Google accounts and constantly getting double-booked because calendars didn't talk to each other. Existing tools were either expensive for what they offered, opaque about what they were doing, or left orphaned events behind when you stopped using them. SYNCDATE was built to be the sync tool we wanted โ minimal, transparent, and safe to turn off.
SYNCDATE's answer:
Next.js (App Router) with TypeScript, PostgreSQL via Drizzle ORM, Redis with BullMQ for background job processing, Google Calendar API with webhook push notifications, and Stripe for billing. Deployed on a Hetzner server behind Cloudflare with a standalone Node.js worker for sync execution. Observability stack uses Grafana, Loki, Prometheus with PagerDuty for alerts.
Protonmail is the best secure email solution period, other products in the suite such as ProtonVPN and hopefully soon Drive and Calendar will finally make it the perfect Gsuite alternative.
Based on our record, ProtonMail seems to be more popular. It has been mentiond 414 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
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I closed all Proton Mail tabs and navigated to protonmail.com and a cleared out login area was shown. Without checking the "keep me logged in", I entered my credentials and was prompted for my 2FA info. I entered that and it worked. Source: almost 3 years ago
Can I add my gmail account to my proton mail account so I can send emails and choose betwen my gmail.com email or my protonmail.com email account? Im not talking about the easy switch feature btw. Source: almost 3 years ago
I hear ProtonMail[1] is good, especially for your needs. [1]: https://protonmail.com/. - Source: Hacker News / almost 3 years ago
Protonmail.com for my primary, though really, simplelogin.com when I sign up at a site. Source: about 3 years ago
Tutanota - Get your encrypted mailbox for free.
OneCal.io - Sync Outlook and Google Calendars in real-time, share booking links, and view all your calendars in one view.
Zoho Mail - Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.
Calensync - Synchronize your Google, Outlook, and iCalendars instantly, and create scheduling links to easily book events based on your availability
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
ChronoLink - Flexibly synchronize events between different calendars. Select and transform events according to your rules. Supports Google, Microsoft (Outlook.com / Exchange Online), Exchange Server, iCalendar/ICS and other systems.