After reading this: https://www.washingtonpost.com/technology/2025/03/20/trump-ends-internet-access-china-iran-otf/
I saw that OTF sponsored letsencrypt generously. can letsencrypt continue to operate without funding from OTF ?
I'm thinking about the infrastructure costs.
Become a Sponsor - Internet Security Research Group (for sponsorship level costs)
I'm sure they will still float without fund from OTF
TIL ISRG added diamond tier for sponsorship
Hard to really say how much of their funding currently comes from that one source.
But it doesn't seem to be a huge amount
"Only" 22 % of the funding comes from diamond and platinum sponsors, according to https://www.abetterinternet.org/documents/2024-ISRG-Annual-Report.pdf (page 42). And OTF is just one of the diamond sponsors. I wouldn't think this impacted Let's Encrypt in a disastrous way.
wait: ISRG sponsorship page says it needs $500k per year to be diamond tier: how they got one with 800k over two years?
For platinum there's also a reduced amount for multiple years, perhaps they also got a discount 
@Osiris can we get the stats from letsencrypt telemetrics how many US IPs use out of those 500 Million certificates ? I will give concrete data points to argue with the funding agencies ?
I don't know as I'm not a Let's Encrypt staff member, just a volunteer on this Community.
@josh Maybe you are the right person to ask ? If you can get the anonymized number of issued certs for ARIN region, then we can argue with policy makers ?
You might be better off contacting Let's Encrypt directly via email.
There might be some related data in Mozilla telemetry. I'm not sure what this probe tells us, tho.
Have fun?
For what it is worth, various outlets are reporting that the OTF's funding is no longer terminated.
