# Microsoft Azure B-Series Virtual Machines
> Microsoft Azure B-Series Virtual Machines are a family of burstable VMs designed for workloads that typically run at a low-to-moderate baseline CPU performance but require high bursts of speed when demand spikes. They operate on a credit-based system where users accumulate CPU credits during periods of low usage to be spent during high-activity bursts.
- URL: https://optimly.ai/brand/microsoft-azure-virtual-machines-b-series
- Slug: microsoft-azure-virtual-machines-b-series
- BAI Score: 92/100
- Archetype: Challenger
- Category: Cloud Computing Services
- Last Analyzed: April 10, 2026
- Part of: Microsoft Azure (https://optimly.ai/brand/microsoft-azure)
## Competitors
- Aws T3t4g Instances (https://optimly.ai/brand/aws-t3t4g-instances)
- DigitalOcean Droplets (Basic) (https://optimly.ai/brand/digitalocean-droplets-basic)
## Buyer Intent Signals
Problems: Manual Instance Management: Manually scheduling instance start/stop times or using basic VMs without burstable logic. | Resource Overprovisioning: Relying on standard fixed-performance VMs and accepting high costs for idling resources.
Solutions: cheapest azure vm for web server | what are burstable virtual machines | best vm for dev test workloads azure | low cost vps with cpu credits | Serverless Computing: Scaling compute via AWS Lambda or Azure Functions to avoid idle VM costs.
Comparisons: azure b-series vs aws t3