List of companies participating in Hacktoberfest 2021

1. GitHub
2. GitLab
3. Open collective
4. DEV
5. Mattermost
6. TIDELIFT
7. MLH
8. CAMUNDA
9. Sourcegraph
10. Milvus
11. SENTRY
12. Appsmith
13. Alpaca
14. ArchiveSpace
15. Appwrite
16. AutoDL
17. Amplication
18. Bitrise
19. Boa Constrictor
20. Bridgecrew
21. Codedamn
22. Codesee
23. Creative Tim
24. DagsHub
25. Datenanfragen.de e. V
26. devICT
27. Devtron
28. Earthly
29. Flyte
30. Globo
31. Hasura
32. K6
33. Legesher
34. LoginRadius
35. Mattermost
36. MayaData & OpenEBS
37. Medusa
38. MeiliSearch
39. Memorial Computer Science Society
40. MindsDB
41. NativeScript
42. NMF.earth
43. Ory
44. Paypal
45. Stack Builders
46. StepZen
47. Supabase
48. Switchblade
49. Symbl.ai
50. ToolJet
51. Zup
52. Bitriseblog
53. Jenkins