Sold by: cloudimg
Deployed on AWS
Free Trial
AWS Free Tier
This product has charges associated with it for seller support. Self-hosted CalDAV and CardDAV server ready in minutes - no setup wizard, no shared credentials. Sync calendars and contacts privately on your own AWS infrastructure with24/7 cloudimg support.
Overview
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Baikal admin sign-in
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Baikal dashboard
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Baikal users
This is a repackaged open source software product wherein additional charges apply for cloudimg support services.
Private Calendar and Contact Sync - Running in Minutes
Baikal is an open source, self-hosted CalDAV and CardDAV server that lets you sync calendars and contacts across all your devices while keeping data private on infrastructure you control. This AMI delivers Baikal 0.11 fully installed and configured - no setup wizard, no manual dependency management, no default credentials. Launch the instance and sign in to the admin console to start creating users, calendars, and address books.
Why This AMI Instead of a Manual Install
Installing Baikal from source requires configuring PHP extensions, tuning a web server, setting up a database, running a browser-based setup wizard, and hardening credentials - a process that can take hours and leaves room for misconfiguration. This image eliminates that entire workflow:
- Zero configuration required - PHP8.3 with OPcache, nginx, and SQLite are pre-tuned and connected
- No separate database server - SQLite keeps the appliance fully self-contained, reducing operational overhead
- No shared or default credentials - every instance generates its own unique admin password and encryption key on first boot
- Dedicated data volume - configuration, SQLite database, and DAV data reside on an independently resizable EBS volume
Application Stack
- Baikal 0.11 built on the proven Sabre/dav library
- PHP 8.3 with OPcache and all required extensions
- nginx web server optimized for CalDAV/CardDAV traffic
- SQLite storage on a dedicated data volume
Secure First Boot
On first launch, a one-shot service generates a fresh administrator password unique to that instance, regenerates the application encryption key, and writes credentials to a root-only file. This eliminates the risk of shared credentials across deployments - every instance starts with a clean, unique security posture.
Compatible Clients and AWS Integration
Baikal works with any standards-compliant CalDAV or CardDAV client, including:
- Apple Calendar and Contacts (macOS and iOS)
- DAVx5 (Android)
- Thunderbird (desktop)
- GNOME Calendar and Contacts (Linux)
On the AWS side, the dedicated data volume leverages Amazon EBS for durable, resizable storage. You can enable EBS encryption for data-at-rest protection and use Amazon CloudWatch to monitor instance health and performance metrics.
Use Cases
- Privacy-focused teams - A small team that needs shared calendars and address books without sending data to third-party SaaS platforms. Launch in your own VPC and keep all personal and scheduling data under your control.
- Self-hosted alternative to commercial platforms - Replace hosted calendar and contact services with an open-standards server that you own, avoiding vendor lock-in and recurring per-user fees.
- Multi-device sync for individuals and families - Sync calendars and contacts across phones, tablets, and desktops using open standards rather than proprietary ecosystems.
cloudimg Support
24/7 technical support by email and live chat. Our engineers assist with Baikal deployment, upgrades, client configuration, performance tuning, and storage administration. Critical issues receive a one-hour average response time.
Getting Started
- Launch the AMI from AWS Marketplace
- Retrieve the generated admin password from the root-only credentials file on the instance
- Browse to the instance address and sign in to the Baikal admin console
- Create users, calendars, and address books
- Point your CalDAV/CardDAV clients at the instance URL to begin syncing
All product and company names are trademarks or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Highlights
- Launch a fully configured CalDAV and CardDAV server in minutes instead of spending hours on manual PHP, nginx, and database setup. Baikal 0.11 with PHP 8.3, OPcache, nginx, and self-contained SQLite storage is pre-tuned and ready - no setup wizard to complete, no dependencies to install. Compatible with Apple Calendar, DAVx5, Thunderbird, GNOME Calendar, and any standards-compliant client.
- Every instance generates its own unique administrator password and encryption key on first boot, stored in a root-only file. No shared or default credentials ever ship in the image. This eliminates credential-sharing risk across deployments - a security gap that manual installs often leave open when teams reuse passwords or forget to change defaults.
- 24/7 technical support from cloudimg by email and live chat, with a one-hour average response for critical issues. Engineers assist with Baikal deployment, upgrades, CalDAV/CardDAV client configuration, performance tuning, and EBS storage administration - expertise that community forums and generic AWS support cannot provide for this specific application stack.
Details
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Delivery method
Delivery option
64-bit (x86) Amazon Machine Image (AMI)
Latest version
Operating system
Ubuntu 24.04
Deployed on AWS
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Pricing
Free trial
Try this product free for 7 days according to the free trial terms set by the vendor. Usage-based pricing is in effect for usage beyond the free trial terms. Your free trial gets automatically converted to a paid subscription when the trial ends, but may be canceled any time before that.
Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time. Alternatively, you can pay upfront for a contract, which typically covers your anticipated usage for the contract duration. Any usage beyond contract will incur additional usage-based costs.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
If you are an AWS Free Tier customer with a free plan, you are eligible to subscribe to this offer. You can use free credits to cover the cost of eligible AWS infrastructure. See AWS Free Tier for more details. If you created an AWS account before July 15th, 2025, and qualify for the Legacy AWS Free Tier, Amazon EC2 charges for Micro instances are free for up to 750 hours per month. See Legacy AWS Free Tier for more details.
Dimension | Description | Cost/hour |
|---|---|---|
m5.large Recommended | m5.large | $0.08 |
t3.micro | t3.micro instance type | $0.04 |
t2.micro | t2.micro instance type | $0.04 |
i3.8xlarge | i3.8xlarge instance type | $0.24 |
i7ie.large | i7ie.large instance type | $0.08 |
m6idn.8xlarge | m6idn.8xlarge instance type | $0.24 |
r5b.16xlarge | r5b.16xlarge instance type | $0.24 |
i7i.12xlarge | i7i.12xlarge instance type | $0.24 |
m8azn.large | m8azn.large instance type | $0.08 |
c8in.xlarge | c8in.xlarge instance type | $0.12 |
Vendor refund policy
Refunds available on request.
Legal
Vendor terms and conditions
Upon subscribing to this product, you must acknowledge and agree to the terms and conditions outlined in the vendor's End User License Agreement (EULA) .
Content disclaimer
Vendors are responsible for their product descriptions and other product content. AWS does not warrant that vendors' product descriptions or other product content are accurate, complete, reliable, current, or error-free.
Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Initial release of Baikal 0.11.
Additional details
Usage instructions
Connect via SSH on port 22 as the default login user for your operating system variant (the user guide lists it per variant). Baikal is served on port 80. Browse to http://<instance-public-ip>/admin/ and sign in as the 'admin' user. Retrieve the generated administrator password with: sudo cat /root/baikal-credentials.txt. Point CalDAV/CardDAV clients at http://<instance-public-ip>/dav.php/. To enable HTTPS, follow the Let's Encrypt section of the user guide.
Resources
Vendor resources
Support
Vendor support
cloudimg Support
cloudimg provides 24/7 technical support for this Baikal AMI by email and live chat.
What we help with:
- Baikal deployment and initial configuration
- Retrieving generated admin credentials
- CalDAV/CardDAV client setup (Apple Calendar, DAVx5, Thunderbird, GNOME, and others)
- Upgrades and patch management
- Performance tuning and optimization
- EBS storage administration and volume resizing
- Troubleshooting connectivity and sync issues
Response times:
Critical issues receive a one-hour average response. Our engineers are available around the clock to ensure your calendar and contact sync service stays operational.
How to reach us:
Email: support@cloudimg.co.uk Live chat: Available 24/7
For refund requests or billing questions, contact us via the same channels and we will assist promptly.
Sizing guidance:
The AMI runs on a dedicated EBS data volume for configuration, database, and DAV data. For specific instance type recommendations and storage sizing based on your user count, contact our support team and we will provide tailored guidance.
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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