Here's a list of team with the least number of appearances in the Playoffs of IPL.
1. Punjab Kings: 2 playoff appearances in 18 seasons
2. Lucknow Super Giants: 2 playoff appearances in 4 seasons
3. Gujarat Titans: 3 playoff appearances in 4 seasons
4. Delhi Capitals: 6 playoff appearances in 18 seasons
5. Rajasthan Royals: 6 playoff appearances in 18 seasons
6. Kolkata Knight Riders: 7 playoff appearances in 18 seasons
7. Sunrisers Hyderabad: 8 playoff appearances in 12 seasons
8. Royal Challengers Bengaluru: 8 playoff appearances in 18 seasons
9. Mumbai Indians: 10 playoff appearances in 18 seasons
10. Chennai Super Kings: 12 playoff appearances in 18 seasons