Amazon OpenSearch vs Azure AI Search: Pricing Comparison (2026)
Updated May 19, 2026AWSAzure
Overall Winner
AWS
AWS Wins
3
Azure Wins
1
Ties
1
Pricing Analysis
AWS wins 3 of 5 price comparisons, averaging 41.6% lower prices in categories where it leads.
Prices range from $0.000003/hr to $16.12/hr across comparable tiers.
- ●AWS leads in Amazon OpenSearch Service Instance (3/4 tiers, avg 30% difference)
Choose AWS
Best for Amazon OpenSearch Service Instance workloads
Side-by-Side Pricing
Comparing Amazon OpenSearch and Azure AI Search across 5 equivalent tiers. On-demand hourly rates are shown in USD for the default region.
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Family:
| Category | AWS Amazon OpenSearch | Azure Azure AI Search | Diff | Cheapest |
|---|---|---|---|---|
Amazon OpenSearch Service Volume - Amazon OpenSearch Service Volume | $0.0000/hr OpenSearch-Vectors-Request-Tier3 ($0.00/mo) | $0.0000/hr Agentic Retrieval Minimum Reasoning - Agentic Retrieval Minimum Reasoning Tokens ($0.02/mo) | +88.6% | Tie |
Amazon OpenSearch Service Instance - c7g.xlarge.search | $0.2410/hr c7g.xlarge.search ($175.93/mo) | $0.3360/hr Standard S1 - Standard S1 Unit ($245.28/mo) | +28.3% | AWS |
Amazon OpenSearch Service Instance - m8g.2xlarge.search | $0.5970/hr m8g.2xlarge.search ($435.81/mo) | $1.3440/hr Standard S2 - Standard S2 Unit ($981.12/mo) | +55.6% | AWS |
Amazon OpenSearch Service Instance - m8g.12xlarge.search | $3.5770/hr m8g.12xlarge.search ($2,611.21/mo) | $2.9568/hr Standard S3 CC - Standard S3 CC Unit ($2,158.46/mo) | +17.3% | Azure |
Amazon OpenSearch Service Instance - i4i.24xlarge.search | $13.1790/hr i4i.24xlarge.search ($9,620.67/mo) | $16.1200/hr Semantic Ranker - Semantic Ranker Unit ($11,767.60/mo) | +18.2% | AWS |
When to Choose AWS Amazon OpenSearch
- ✓Amazon OpenSearch Service Instance - c7g.xlarge.search - saves $69.35/mo (28.3% cheaper)
- ✓Amazon OpenSearch Service Instance - m8g.2xlarge.search - saves $545.31/mo (55.6% cheaper)
- ✓Amazon OpenSearch Service Instance - i4i.24xlarge.search - saves $2,146.93/mo (18.2% cheaper)
When to Choose Azure Azure AI Search
- ✓Amazon OpenSearch Service Instance - m8g.12xlarge.search - saves $452.75/mo (17.3% cheaper)
Monthly Cost Examples
Amazon OpenSearch Service Volume - Amazon OpenSearch Service Volume
AWS OpenSearch-Vectors-Request-Tier3$0.00/mo
Azure Agentic Retrieval Minimum Reasoning - Agentic Retrieval Minimum Reasoning Tokens$0.02/mo
Amazon OpenSearch Service Instance - m8g.2xlarge.search
AWS m8g.2xlarge.search$435.81/mo
Azure Standard S2 - Standard S2 Unit$981.12/mo
Amazon OpenSearch Service Instance - i4i.24xlarge.search
AWS i4i.24xlarge.search$9,620.67/mo
Azure Semantic Ranker - Semantic Ranker Unit$11,767.60/mo
Individual Pricing Details
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