Kamal
Zero-downtime deployment tool for web apps (by 37signals).
⭐ 4.3/5Free Tier AvailableOpen SourceFounded 2023
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About Kamal
Kamal (formerly MRSK) deploys web apps anywhere — from bare metal to cloud VMs. Created by 37signals (Basecamp/HEY), it uses Docker to deploy with zero-downtime rolling updates.
Kamal Interface Preview
Pricing at a Glance
| Free Tier | Lowest Paid | Enterprise |
|---|---|---|
| Fully open source | Free | Free |
Key Features
✓Zero-Downtime Deploy
✓Docker-Based
✓Multi-Server
✓Rolling Updates
✓Traefik Integration
✓Accessory Management
Use Cases
- • DevOps workflow optimization
- • Kamal onboarding for new teams
- • Reducing manual tasks with Kamal automations
Popular Integrations
SlackGoogle WorkspaceZapierHubSpotSalesforceNotion
Pros & Cons
👍 Pros
- ✓Simple and focused
- ✓Deploy anywhere
- ✓No vendor lock-in
- ✓37signals-backed
👎 Cons
- ✗Ruby-centric
- ✗Less features than K8s
- ✗Newer tool
- ✗Limited ecosystem
User Reviews & Testimonials
“We switched in under a week and cut software spend materially while keeping the same workflow quality.”
“The comparison + pricing context made this an easy decision. Great shortlist quality.”
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