DocumentDB (MongoDB compatible)
- Docs: https://docs.aws.amazon.com/documentdb/
- Docs (llms.txt): https://docs.aws.amazon.com/documentdb/latest/developerguide/llms.txt
- Data model: Document (JSON/BSON documents in collections)
- Query language: MongoDB Query Language (MQL), aggregation pipeline
- Compatibility: MongoDB 4.0/5.0/6.0/7.0/8.0 compatible (drivers, tools, aggregation pipeline)
- Serverless: Yes (elastic clusters, available on DocumentDB 8.0)
- Serverless type: Capacity — elastic clusters auto-scale storage and compute, but you still manage a cluster (no scale to zero)
- Scale to zero: No
- VPC required: Yes
- Multi-region: Global clusters
- Free Tier: 12 months (750 hrs db.t3.medium + 30 GB storage)
- Min cost: ~$0 (free tier) → ~$55/month after
- Time to first query: 10-15 min (VPC + cluster)
- Key features: MongoDB compatibility, elastic clusters (sharding up to 32 shards), change streams, ACID transactions, flexible schema, vector search (30x faster index builds on 8.0), Serverless auto-scaling (up to 90% savings vs provisioned peak)
- Limitations: Not full MongoDB (some operators unsupported), VPC required, no serverless scale-to-zero
- Best for: MongoDB migrations, content management, catalogs, user profiles, flexible schema applications
- Not for: Simple key-value (DynamoDB is better), time-series (Timestream), graph (Neptune)