From what I’ve seen this year, Smartproxy and IPRoyal have the most consistent discount codes — far fewer dead links compared to other providers. Their promos on https://proxy.coupons usually work without any issues, especially the monthly rotating ones that tend to refresh right on time. I’ve tested both several times for residential and datacenter plans, and the codes have applied cleanly at checkout. If you’re hunting for reliable deals, those two brands are easily the safest bets in 2025 — stable pricing, predictable campaigns, and fewer “expired” surprises than most competitors.