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OpenAI API vs Azure OpenAI Service

This comparison was retrieved by database IDs selected from the catalog.

OpenAI API favicon

OpenAI API

OpenAI

Azure OpenAI Service favicon

Azure OpenAI Service

Microsoft

Overview
Rating
—
—
Category
Developer Tools
Developer Tools
Subcategory
AI API Platform
Enterprise AI API
Company
OpenAI
Microsoft
Status
Active
Active
Launch year
2020
2023
Tags
apiopenaideveloperllmgpt-4enterprise
azuremicrosoftopenaienterprisecomplianceapi
Pricing
Starting price
FreeBest value
Free
Pricing model
Usage-based
Usage-based
Free plan
Yes
No
Free trial
✕
✓
Pricing notes

Free $5 in trial credits for new accounts. Usage-based per token: GPT-4o at $2.50/million input tokens, $10/million output tokens. o1 at $15/million input tokens. Realtime API at $5/million audio tokens. Enterprise volume discounts.

Pay-as-you-go per token. Free tier with limited credits for new Azure accounts. Pricing matches OpenAI API rates (e.g. GPT-4o at $2.50/million input tokens). Provisioned throughput available. Enterprise custom pricing.

Capabilities
Best for
Application developmentChatbot buildingRAG applicationsVoice AIImage generation integrationBatch text processing
Enterprise AI deploymentCompliance-sensitive API useAzure-integrated applicationsRegulated industry AIHIPAA-eligible workloads
Target audience
DevelopersAI startupsEnterprise engineering teamsML engineersAI application builders
Enterprise developersAzure-centric organisationsRegulated industriesHealthcare and financial servicesGovernment
AI type
LLM Platform
LLM Platform
Modalities
TextImageAudioCode
TextImageAudioCode
Technical
Model provider
OpenAI
OpenAI
Model names
GPT-4oGPT-4o1o3WhisperDALL-E 3text-embedding-3
GPT-4oGPT-4WhisperDALL-E 3
API available
✓
✓
Open source
✕
✕
Deployment
SaaSAPI
SaaSAPI
Platforms
WebPythonNode.jsJavaGo
Web (Azure Portal)API
Integrations
LangChainLlamaIndexZapierAzure OpenAIAll major frameworks
Azure AI SearchAzure Cognitive ServicesAzure FunctionsPower BIDynamics 365
Team collaboration
✕
✓
Trust & security
Security

Enterprise API includes data handling agreements, no model training on data by default, and SOC 2 Type II certification. Standard API users: review data handling policy.

Full Azure enterprise security stack: SOC 2 Type II, ISO 27001, HIPAA, GDPR, FedRAMP. Regional data residency available. Customer data not used for OpenAI model training.

Privacy notes

Default API users: review OpenAI's data handling policy. Enterprise API: data not used for model training, with data handling agreements. Zero Data Retention option available for sensitive use cases.

Data processed within customer-specified Azure regions. Customer data not used to train OpenAI models. Microsoft enterprise agreements apply to data handling.

Verdict
Pros
  • Most widely used AI API with the broadest developer ecosystem
  • Well-documented with official SDKs for major programming languages
  • Realtime API enables low-latency voice AI applications
  • Function calling and structured output enable reliable application patterns
  • Same OpenAI model quality with Azure enterprise compliance coverage
  • Regional data residency for GDPR and data sovereignty requirements
  • Fits existing Azure enterprise relationships and billing
  • HIPAA and FedRAMP coverage for regulated industries
Cons
  • More expensive than competing APIs for some models
  • o1 reasoning model pricing is high for cost-sensitive workloads
  • Vendor lock-in risk without multi-provider architecture
  • Same or slightly higher cost than direct OpenAI API
  • Requires Azure account and familiarity with Azure services
  • Less relevant for non-Azure organisations
  • Azure service complexity adds overhead for simple use cases

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