Here's a current list of vendors I think are doing well.
Startups who are accelerating
support -- @plainsupport (sync and push comms to edges - teams/slack/discourse - is next level good)
docs -- @mintlify (Suddenly made all softwares documentation 10x better)
customer analytics -- @tinybirdco (IaC for data work, its fast with an excellentlocal experience.)
auth + subscriptions -- @ClerkDev
Analytics & Product Insights, gating experiments -- @statsig (runner up posthog, but statsig is much more precise on hardcore statistics)
secrets -- @doppler (excellent syncing experience)
mail etc. -- @resend (local email experience)
incidents, ops -- @rootlyhq (slack driven workflows are top tier)
ai agents / code -- @cursor_ai (still winning)
ticket/agent mgmt + triage etc -- @linear (elite quality)
hosting/deploys -- @Railway / @vercel (out-of-your-face infra to stay focussed on customers & product)
integrations marketplace -- @useparagon (iac for integrations, event driven and solid management. even ootb workflow builder canvas)
Incumbents (who cant seem to be beaten)
search -- Algolia
dataw -- BigQuery (gsheets native integration can't be beaten)
payments -- Stripe (too big to beat)
internal docs -- @NotionHQ (sort of incumbent, but cool)
all ops -- @datadoghq (so feature dense it can't be beaten, esp for speed of getting started)
code / cicd / automations -- @github (native gha mean nothing else needs to be used)