One place for all your calendars and contacts.
Baikal is the simple way to manage your calendars and contacts in one place and keep them in sync across all your devices. It works with the apps you already use — your phone, your laptop, your tablet — so your schedule and address book are always up to date.
What makes Baikal worth launching.
Sync calendars and contacts with iPhone, Android, Mac, Windows, and Thunderbird — no special software needed.
Manage users, create new calendars, and organize address books from a simple browser-based control panel.
Create shared calendars for your family, team, or housemates so everyone stays on the same page.
If you fit one of these, Baikal is probably built for you.
Practical scenarios where Baikal makes a real difference.
Create a shared family calendar so everyone knows about school events, appointments, and weekend plans — no matter what phone they use.
Store all your contacts in one place that syncs to every device, so adding a new number on your laptop means it's instantly on your phone.
Baikal is a lightweight tool that keeps your calendars and contacts perfectly synced across every device you own. Instead of manually adding an event to your phone and again to your laptop, Baikal does the work for you — update once, and it shows up everywhere. You manage everything through a clean web interface where you can create users, set up shared calendars, and organize address books. It works seamlessly with iPhone, Android phones (via DAVx5), Apple Calendar, Mozilla Thunderbird, and most other calendar and contact apps. Whether you're coordinating a family schedule or keeping your work contacts organized, Baikal makes sure nothing slips through the cracks.
Baikal gives you a central hub for your calendars and contacts that works with every device you own — iPhone, Android, Mac, Windows, or Linux. It's built for people who want their schedule and contacts to just work everywhere without juggling multiple accounts or paying for separate syncing services. Families love it for shared calendars that bridge iPhone and Android households. Small teams use it to keep everyone aligned on events and deadlines. And because it's open source with an active community, it's constantly improving with features the community actually wants.
No per-seat pricing
Add your whole team for one flat fee.
Your data stays yours
Nothing passes through a third-party cloud.
Use your own domain
Run it on yourdomain.com with free SSL.
No terminal. No config. No docs.
Workflow automation
n8n.aurora.openzapps.com
Monitors, fixes & deploys 24/7
One platform. Every app. No surprises.
Your own private server — no shared hosting, no slowdowns.
Deploy Baikal and as many other apps as you want — no per-app charges, ever.
Full ownership. No third-party access. Export anytime.
Unlimited apps, unlimited users, unlimited traffic. One bill.
SSL, backups, and updates run automatically behind the scenes.
Cancel anytime. Take your data with you. No questions asked.
What others charge for just the empty server.
Server costs only. Prices checked June 2026.
4 vCPU cores, 8 GB RAM, 150 GB storage
A solid place to start
| Provider | Their price | You save |
|---|---|---|
| DigitalOcean | $48/mo | $29 (60%) |
| Vultr | $40/mo | $21 (53%) |
| Linode | $48/mo | $29 (60%) |
| AWS Lightsail | $84/mo | $65 (77%) |
| Google Cloud E2 | $103.45/mo | $84.45 (82%) |
8 vCPU cores, 24 GB RAM, 400 GB storage
The sweet spot for most people
| Provider | Their price | You save |
|---|---|---|
| DigitalOcean | $144/mo | $95 (66%) |
| Vultr | $144/mo | $95 (66%) |
| Linode | $192/mo | $143 (74%) |
| AWS Lightsail | $164/mo | $115 (70%) |
| Google Cloud E2 | $231.17/mo | $182.17 (79%) |
16 vCPU cores, 64 GB RAM, 600 GB storage
For power users
| Provider | Their price | You save |
|---|---|---|
| DigitalOcean | $384/mo | $285 (74%) |
| Vultr | $320/mo | $221 (69%) |
| Linode | $384/mo | $285 (74%) |
| AWS Lightsail | $384/mo | $285 (74%) |
| Google Cloud E2 | $474.53/mo | $375.53 (79%) |
Prices checked June 2026. Excludes taxes, credits, backups, bandwidth.
Everything you need to know about launching Baikal on OpenZapps.
Baikal is a tool that keeps your calendars and contacts synced across all your devices. Add an event on your laptop and it shows up on your phone automatically.
Not at all. OpenZapps handles everything technical — you just pick Baikal from the catalog, and it's ready to use in minutes through your custom domain.
You pay OpenZapps one flat monthly fee to run Baikal (and any other apps you want). There are no extra charges, no per-user fees, and no surprise bills.
Yes. Your calendars and contacts live on your own private cloud server through OpenZapps. No one else has access to your data.
Yes! OpenZapps lets you use your own custom domain so you can access your calendars and contacts at something like calendar.yourname.com.
Try something new — same platform, same flat price.
Start free, launch Baikal in seconds, and cancel whenever you want — zero risk.
Plans start at $29/month. Cancel anytime.
