Integrations Becoming SaaS Infrastructure

This marks integrations becoming infrastructure instead of side project code. The pattern is the same as authentication, where growing feature demands turned a one off build into a permanent maintenance burden, and then specialist vendors won by making the hard parts repeatable, like OAuth, syncing, webhooks, rate limits, and edge case handling across dozens of apps.

• The trigger is product pressure, not just engineering convenience. B2B SaaS buyers now judge tools on how well they connect to Salesforce, HubSpot, and Zendesk, and some vendors win deals on integration quality alone. That pushes integrations out of the backlog and into the core product.
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• The auth comparison is specifically about the buy versus build decision collapsing. Auth0 scaled into a major standalone category and was acquired by Okta for $6.5B in May 2021, showing how a messy feature set can become standard outsourced infrastructure once enough companies need the same thing.
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• A new layer of developer tools is forming around customer facing integrations. Vessel argues no code workflow tools like Zapier or Workato are fine for internal automations, but product teams need code level control. Similar API infrastructure plays like Recall.ai have shown the same demand for outsourced integration plumbing in adjacent categories.
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The next step is a market where most SaaS products ship with outsourced integration infrastructure by default, just as they already do with auth and cloud hosting. The winners will be the platforms that let engineers start generic, then go deep on product specific behavior without rebuilding the whole stack.