FWIW, $25m was a pretty conservative estimate. One way to look at it is to take the number of employees and multiply by $200k. That would imply upwards of $50m in revenue. https://www.saastr.com/how-to-figure-out-your-competitors-re...
It may take some time to get there, but they'll almost certainly break $100m. The VCs at this round probably won't sell immediately after the IPO, either -- trying to make 10x in 2 years isn't the plan.
Also, 7+ years to that level isn't the worst, by any means. The more relevant metric is growth in the last couple years. If they're still doing 100%+ year-over-year, that's pretty great. https://redislabs.com/press/redis-labs-announces-10th-consec...