Upwork - $
Profitwell - $0
Stripe (in hindsight would have used accepton.com) - $$
BeStunning(for dunning) - $$ ( but they have a boostrap plan)
Bootstrap (landing page - would have used instapage for landing page in hindsight) - $0
Zapier - 100 tasks/mo free. - $0, $15/mo etc...
Quuu.co - twitter & Fb automation - $
Canva.com - Ads creation
StartupLister.com or Promotehour.com
rapidssl.com
godaddy.com
Heroku
AWS
Twilio- message me on this one, I have good work-arounds. For European/more global customers as well, I wish we would have switched earlier off of twilio.
Intercom
Iubenda- good for terms of service.
Mixpanel - used their startup plan.
Google Analytics - The most important report in GA is 'google analytics full referral URL report'
Conspire
Elink.Club
Tweetfull, Crowdfire, Archie.co -- still toying around with these.