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Gandi.net's answer:
Based on our record, NS1 seems to be more popular. It has been mentiond 7 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
NS1 (IBM): A less conventional but highly flexible service that provides data-driven DNS routing capabilities. - Source: dev.to / 8 months ago
Heroku's big outage recently was due to DNS, which was outside of their control (it was an outage with https://ns1.com/). What are you going to do when your DNS goes down? Probably nothing better than Heroku. Source: about 1 year ago
I know Cloudflare is a good one, but also I would recommend checking out NS1 - they're great. Source: over 1 year ago
NS1 is exceptionally nice. Depends on what "affordable" means to the director though. Wouldn't hurt to ask them for a quote, they just might give a discount for edu. Source: over 1 year ago
Ns1.com - as of yet they dont do training, but they have a cloud offering and can manage it for customers. Source: almost 2 years ago
Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.
Namecheap - The Best Domain Name Registrar when it comes to Customer Service. Learn why over 800,000 customers trust us with a total of over 3,000,000 domains.
Google Cloud DNS - Reliable, resilient, low-latency DNS serving from Google’s worldwide network of Anycast DNS servers.
GoDaddy - GoDaddy makes registering Domain Names fast, simple, and affordable. Find out why so many business owners chose GoDaddy to be their Domain Name Registrar.
Cloudflare DNS - Install the free app that makes your phone’s Internet more fast, private, and reliable.
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.