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Databases · head to head

CosmosDB vs Zeabur

CosmosDB logo

CosmosDB

Databases

Globally distributed, multi-model database service from Azure

From
Free
Rated
-
Full reviewWebsite
Zeabur logo

Zeabur

Cloud

AI-powered cloud deployment platform for developers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: CosmosDB autoscale provisioned throughput enforces a minimum of 1,000 RU/s, billed hourly whether or not the database is used; Zeabur free plan limited to single server with 48-hour log retention
  • They diverge on capability: CosmosDB covers Global Distribution, Zeabur covers AI Agent.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which CosmosDB and Zeabur actually diverge.

Attributes where CosmosDB and Zeabur differ
AttributeCosmosDBZeabur
Pricing modelusage-basedFixed monthly plans
PlatformsWeb, AzureWeb, CLI
CategoryDatabasesCloud
Founded19752025

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in CosmosDB

  • Global Distribution
  • Multi-model APIs
  • Elastic Scaling
  • Five Consistency Levels
  • SLA-backed Latency
  • Automatic Indexing
  • Serverless
  • Azure Functions

Only in Zeabur

  • AI Agent
  • Managed Servers
  • Domain and DNS Management
  • Email Service
  • AI Hub
  • Deploy Templates
  • Git Integration

What people use each for

The jobs each tool is most often brought in to do.

CosmosDB

  • Running a globally distributed multi model database on Azurenot Zeabur
  • Serving low latency reads and writes from multiple Azure regionsnot Zeabur
  • Storing document, key value and graph data behind a managed servicenot Zeabur

Zeabur

  • Deploying full-stack web applications without DevOps expertisenot CosmosDB
  • Building AI agent infrastructure with integrated API accessnot CosmosDB
  • Managing multi-region deployments with automated scalingnot CosmosDB
  • Running containerized services with built-in domain and emailnot CosmosDB

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

CosmosDB

  • Autoscale provisioned throughput enforces a minimum of 1,000 RU/s, billed hourly whether or not the database is used
  • Provisioned throughput is charged in every region the account is replicated to, so multi region accounts multiply the RU bill
  • Storage charges cover data, indexes and backups in each replicated region
  • Egress out of Azure and between regions is charged, though ingress is free
  • The free allowance is one account per Azure subscription, limited to 1,000 RU/s and 25 GB
  • RU/s rates vary by region and are only shown through the pricing calculator rather than a flat published rate

Zeabur

  • Free plan limited to single server with 48-hour log retention
  • Small team size may limit support and feature velocity
  • Building spec upgrades limited on lower tiers
  • Enterprise support not clearly documented

Pricing, plan by plan

CosmosDB

Free
  • Free TierFree
    • 1000 RU/s
    • 25GB storage
    • First 12 months
  • ServerlessFree
    • Pay per request
    • Auto-scaling
    • Event-driven workloads

Zeabur

Free
  • FreeFree
    • 1 manageable server
    • 2C4G build specs
    • 48-hour log retention
  • Dev$5/month
    • 3 manageable servers
    • 7-day log retention
    • 250 MB file uploads
  • Pro$19/month
    • 10 manageable servers
    • 4C8G build specs
    • 30-day log retention
  • Team$79/month
    • 3 included seats
    • Unlimited manageable servers
    • 90-day log retention

Which should you pick?

Choose CosmosDB if

  • You need global distribution.
  • You want to start without paying.
  • You work on Web, Azure.
  • You also want multi-model apis.
CosmosDB review

Choose Zeabur if

  • You need ai agent.
  • You want to start without paying.
  • You work on Web, CLI.
  • You also want managed servers.
Zeabur review

Questions people ask

Is CosmosDB or Zeabur better?
Neither clearly leads. CosmosDB starts at Free and Zeabur at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, CosmosDB or Zeabur?
CosmosDB starts at Free and Zeabur at Free.
Does CosmosDB or Zeabur run on more platforms?
CosmosDB runs on Web, Azure. Zeabur runs on Web, CLI.
Can I use CosmosDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is CosmosDB best used for?
CosmosDB is most often used for running a globally distributed multi model database on azure, serving low latency reads and writes from multiple azure regions, storing document, key value and graph data behind a managed service. Of those, running a globally distributed multi model database on azure and serving low latency reads and writes from multiple azure regions are not what Zeabur is typically brought in for.
What can CosmosDB do that Zeabur cannot?
CosmosDB covers Global Distribution, Multi-model APIs, Elastic Scaling, Five Consistency Levels. Zeabur covers AI Agent, Managed Servers, Domain and DNS Management, Email Service.

Answered from the vendors’ own pages

CosmosDB: Is there a free tier for Azure Cosmos DB?

Yes, Cosmos DB offers a free tier with 1,000 RU/s of throughput and 25 GB of storage per month for the lifetime of the account, available to new accounts.

Source
Zeabur: What is included in the free plan?

The free plan includes 1 manageable server, 2C4G build specifications, 48-hour log retention, 50 MB file upload limit, and community support.

Source
CosmosDB: How is Cosmos DB priced after the free tier?

Cosmos DB uses three billing models: provisioned throughput billed per request unit per second, vCore pricing for certain APIs, or serverless consumption pricing where you pay only for requests processed. Reserved capacity offers 20% discount for one year or 30% for three years.

Source
Zeabur: How do additional seats work on the Team plan?

The Team plan includes 3 seats with additional seats available at $24 per seat per month.

Source
CosmosDB: Can I change my pricing model after choosing one?

No. Once you select a compute pricing model and API, they cannot be changed. This choice is permanent for that database.

Source
Zeabur: Is there a free trial period?

The Dev and Pro plans include 14 days free before billing begins.

Source
CosmosDB: Is there a trial period for Cosmos DB beyond the free tier?

Azure offers a 30-day free trial account for all Azure services. Additionally, Azure AI customers may be eligible for a 90-day free Cosmos DB subscription through the Azure AI Advantage program.

Source
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