It only works for certain kinds of sites, but if it's a site you can host on third-party hosting (as opposed to needing DDOS protection of your own network or V

It only works for certain kinds of sites, but if it's a site you can host on third-party hosting (as opposed to needing DDOS protection of your own network or VPS), Nearlyfreespeech.net has a pretty good track record with mitigating DDOS on sites they host. They also have a strong ethos of not blaming the customer for "provoking" the attack, or terminating them for the inconvenience.