Is GraphQL open source?

Related questions

1. What is Apollo Server Express?
2. What was Apollo's purpose?
3. Who did Apollo kill?
4. Is GraphQL restful?
5. Is Apollo server free?
6. What does Apollo mean today?
7. What is Facebook relay?
8. What is BFF pattern?
9. What is Apollo famous for?
10. What database does GraphQL use?

Tags

1. #fulfilling
2. #queries
3. #relay
4. #include
5. #before
6. #developed
7. #graphql
8. #client
9. #clients
10. #facebook
11. #internally
12. #major
13. #runtime
14. #language
15. #query
16. #existing
17. #being
18. #manipulation
19. #publicly
20. #apollo
21. #released
22. #source