Competitors There are a few competitors out there that do something very similar (see https://ruttl.com/, https://usepastel.com/, https://bugherd.com/, https://www.markup.io/). This seems to suggest that there seems to be a general market for such a product. Source: about 1 year ago

Yes, we used Pastel https://usepastel.com and it was very nice overall. - Source: Hacker News / almost 2 years ago

Much of your traffic is probably passing through Hurricane Electric servers already, given their position on the backbone (https://he.net). - Source: Hacker News / 3 days ago

Hurricane Electric is a global internet service provider offering internet transit tools, network and applications, as well as data center colocation and hosting services. As of May 2023, Hurricane Electric was one of the largest global IP networks as measured by network adjacencies in both IPv4 and IPv6. More information regarding Hurricane Electric can be found on their corporate website: https://he.net/ . Source: 6 months ago

Another one I'll mention, as it might be rather to quite easy - depending upon one's IPv6 knowledge/experience - and it's also free. It's slightly dated (some bits have changed since it was created, but it's mostly still highly applicable). Anyway, Hurricane Electric's IPv6 Certification - can even get oneself spiffy "badge"s - like I've got one of those (details & score style) (also available in different... Source: 10 months ago

The other comment with the answer disappeared, but it was to create a static route for the /64 on PFSENSE1 to the WAN IPV6 of the PFSENSE2. This allows that WAN to pass the traffic through the he.net IPV6 tunnel. Source: 12 months ago

I have been using he.net's tunnelbroker service for sometime. I am familiar with it and it works well. Source: 12 months ago