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    * [airtable.com](https://airtable.com/) — Looks like a spreadsheet, but it's a relational database, unlimited bases, 1,200 rows/base and 1,000 API requests/month
    * [elephantsql.com](https://www.elephantsql.com/) — PostgreSQL as a service, 20 MB free
+   * [cloudamqp.com](https://www.cloudamqp.com/) — RabbitMQ as a Service, up to 1M messages/month and 20 connections free
    * [FaunaDB](https://fauna.com/) — Serverless cloud database, with native GraphQL, multi-model access and daily free tiers up to 5GB
    * [graphenedb.com](https://www.graphenedb.com/) — Neo4j as a service, up to 1,000 nodes and 10,000 relations free
    * [heroku.com](https://www.heroku.com/) — PostgreSQL as a service, up to 10,000 rows and 20 connections free (provided as an "addon," but can be attached to an otherwise empty app and accessed externally)