Are you getting a lot of spam comments on your forum?

Spamming is something which is very common in happening on forums and blogs. It's as if spammers are paid to do on communities. There are bot spammers and human spammers, which one of them irks you so much when they keep spamming your community?

Are you getting a lot of spam comments on your forum?

Nope, not at all. I don’t get any spam on my forum. All new registrations are checked through “stopforumspam’s” database first and I also use Cloudfare’s turnstile.

I use open source platforms (phpBB and MyBB), I get a lot of spam comments on phpBB, sometimes I get over 100 spam comments in a day

No. A few things that help in XF.
StopForumSpam and Project Honeypot catch a lot at the gate. I have the system set up reject users based upon 2 flags, and use an add-on to specify those to be IP and email. Turnstile (from CloudFlare) also stops a lot of them from registering and using the Contact Us function. Askimet also helps, but does catch some false positives and those get put into moderation.
The "spam" that I am getting right now are actual human registrations that are putting porn links in their website address for their profile. I know have an add-on installed that provides that type of information for me in for new registrations.

I know when I ran IPS their spam protection was pretty good also.

I receive little to no spam on my Jcink forum. I think I've only had to ban a total of 4/1700+ members on my board and they were all banned for posting spam, primarily advertisements.