Apache hadoop is open source, free, and there are top 6 hadoop vendors providing big data platforms.

Apache hadoop is open source, free, and there are other 10  hadoop vendors providing big data platforms.


https://www.dezyre.com/article/top-6-hadoop-vendors-providing-big-data-solutions-in-open-data-platform/93

1) Amazon Elastic MapReduce

2) Cloudera CDH Hadoop Distribution

3) Hortonworks Data Platform (HDP)

4) MapR Hadoop Distribution

5) IBM Open Platform

6) Microsoft Azure's HDInsight -Cloud based Hadoop Distrbution

7) Pivotal Big Data Suite

8) Datameer Professional

9) Datastax Enterprise Analytics

10) Dell- Cloudera Apache Hadoop Solution.

Amazon's big data platform is complete.

https://aws.amazon.com/big-data/

It has a lot of things there, hadoop, spark, s3, ec2, redshift, kinesis etc. 

Apache hadoop, and apache hive etc are free. If you have a linux platform, you can install them on your linux.