Hardest to clone

Ranked by our composite score — technical build difficulty PLUS business moat. High means you can't just copy it and out-compete it: either the engineering is brutal, the moat is a fortress, or both.

score = build difficulty + moat — can you copy it and win?

1. 1Polsiamoat Moderate10
2. 2GitHubmoat Fortress10
3. 3Bitbucket (Atlassian)moat Fortress10
4. 4GitLab.com (marketing site + DevSecOps platform)moat Fortress10
5. 5DigitalOceanmoat Fortress10
6. 6Netlifymoat Fortress10
7. 7Fly.iomoat Fortress10
8. 8Render.commoat Fortress10
9. 9Railwaymoat Strong10
10. 10Neon (neon.tech)moat Fortress10
11. 11PlanetScalemoat Fortress10
12. 12WorkOSmoat Fortress10
13. 13Auth0 (by Okta)moat Fortress10
14. 14Emergent.shmoat Fortress10
15. 15LaunchDarklymoat Fortress10
16. 16PagerDutymoat Fortress10
17. 17Grafana Labsmoat Fortress10
18. 18Datadogmoat Fortress10
19. 19Sentry.iomoat Fortress10
20. 20Fullstorymoat Fortress10
21. 21Hotjarmoat Fortress10
22. 22Segment (Twilio Segment) — Customer Data Platformmoat Fortress10
23. 23Mixpanelmoat Fortress10
24. 24Amplitudemoat Fortress10
25. 25Attiomoat Fortress10
26. 26Pipedrivemoat Fortress10
27. 27Close CRMmoat Strong10
28. 28lemlistmoat Fortress10
29. 29Clay.commoat Fortress10
30. 30Apollo.iomoat Fortress10