The table below resume the applied price for the Datacenter version of Kepler - Multi-Factor Authentification
| Users | Price ($/year) |
|---|---|
| 50 | 100 |
| 100 | 150 |
| 250 | 250 |
| 500 | 350 |
| 750 | 450 |
| 1000 | 600 |
| 2000 | 1000 |
| 3000 | 1400 |
| 4000 | 1700 |
| 5000 | 1900 |
| 6000 | 2050 |
| 7000 | 2200 |
| 8000 | 2350 |
| 9000 | 2500 |
| 10000 | 2650 |
| 11000 | 2800 |
| 12000 | 2950 |
| 13000 | 3100 |
| 14000 | 3250 |
| 15000 | 3500 |
| 20000 | 4000 |
| 25000 | 4400 |
| 30000 | 4800 |
| 35000 | 5200 |
| 40000 | 5600 |
| 45000 | 6000 |
| 50000 | 6400 |
| unlimited users | 7000 |
You can find more information about Atlassian pricing strategy over here: https://www.atlassian.com/licensing/data-center-approved-apps#