What are the best communities or groups to go to for support for a product launch?

You will find a list of Slack communities here https://www.startups.com/library...

I had the luck to run into @jasondainter who has been a hunter since back in the days with this was still foundr-led. His help has been invaluable to us as we're complete newbies in the world of Product Hunt, at least when it comes to launching on our own.

ex-colleagues and uni friends

The ones you have nurtured since day 1 and those who are already interacting regularly with your product.

Communities where you’ve been active: Launch day is not a time to go spamming Reddit and Indie Hackers if you haven’t already been posting there, but if you’ve built a community elsewhere, don’t forget to let them know too. I run a community for makers that also has a couple of PH team members on it: https://chat.whatsapp.com/ErDITI...

I use many platforms but PH I can consider the best for launching SaaS product

I don't think there aren't any because they ask for money for a better support. I believe you need to create your own community to get support.

Well, there are lots of communities and groups where you can launch your products, some of them that are most popular and reputed are LinkedIn, Reddit, Producthunt, Facebook groups, social media, and many more. Thanks

Idie Hacker?

productledgrowth.slack.com

In LinkedIn there are a groups like Promotion group: https://www.linkedin.com/groups/...

LinkedIn & Facebook groups. :)

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Here is a WhatsApp community for Product Hunt launch support! https://chat.whatsapp.com/Bo1AeZ...