It's fairly rare during general browsing, but Mullvad makes no attempt to hide that their servers are VPN IPs, so any site that explicitly wants to block VPN users will very likely block Mullvad. Mostly an issue if you're trying to use a VPN to view geo-blocked media.
I get lots of Cloudflare authenticators, some Youtube content gets blocked, and a few sites will not load at all. Reddit (which I avoid as often as possible) blocks it completely [1]. Switching to a different country sometimes works but increasingly does not. I don't use streaming services apart from Youtube.
Still, I am happy with the service and will continue to use it.
Edit:
[1] As others have written below, Reddit blocks when not logged in. Since I don't have an account, that's a 100% block rate for me.
Often. It is becoming a big problem. In the last couple of days youtube has become almost unusable. Reddit is usually blocked. Twitch shadowbans chats. A lot of random unexpected sites block it like wiki pages. Captchas make google too annoying to use (but mullvad has its own proxy called Leta but it lacks features like suggested corrections to the search). I still use it always and persist despite this. Often hopping servers will work but I might have to try 5+ different servers
I switched from Mullvad to ProtonVPN for this exact reason about 1.5 years ago. Unfortunately ProtonVPN seems to be even worse at this now. It's become clear that the more popular VPN services are increasingly having connectivity problems to many popular sites (social media, streaming media, etc.)
Often if you're on a bad node that has been rate-limited, usually connecting to a different node in the region helps. However VPN blocking very often and more frequent especially this year, it seems like walls are going up everywhere.
Side note: one of Mullvad's Miami servers is blocked by HN, I have to switch nodes if I land on that one because "Sorry" message.
> Side note: one of Mullvad's Miami servers is blocked by HN, I have to switch nodes if I land on that one because "Sorry" message.
I frequently hit "Sorry" messages when opening a few HN links in quick succession through Mullvad too. I suppose the IPs have been flagged as potentially malicious.
Not sure what it takes for that to happen though; my server that archives every post made on HN has yet to get banned or heavily ratelimited, it just hits a 429 every once in a while.
I use the default endpoint in Sweden, and I can’t access Reddit and YouTube without being logged in (which I refuse to do). Not an issue in the end because it’s mostly a waste of time.
Most Cloudflare sites throw up captchas, switching to other Mullvad servers every hour does not help anymore. Reddit blocks completely. Many other YC funded startups block Mullvad VPN (I miss Paul Graham's influence, don't you?). Port forwarding was removed by Mulled company so less bittorrent peers. All magnet link search engines and 90% torrent sites block Mullvad, even though these sites advertise VPN.
