Find What SaaS Tools Competitors Use via Sub-Processors | ashishb.netFind What SaaS Tools Competitors Use via Sub-Processors<br>July 18, 2026 · 2 min #B2b #Saas #Security<br>Tech thoughts<br>Want to know what SaaS stack a B2B company runs on? You don’t need a data leak or an<br>insider - the company publishes it for you. Look at their sub-processor list .<br>Most B2B companies are contractually required to disclose every third-party vendor that<br>touches customer data. These sub-processor pages are public, they’re kept up to date, and<br>they quietly reveal a competitor’s entire tech stack: cloud provider, monitoring, customer<br>support, AI/ML vendors, and more.<br>What is a sub-processor?#<br>A sub-processor is any third-party service a company shares customer data with to run its<br>product - think AWS for hosting, Datadog for monitoring, or OpenAI for AI features. Privacy<br>regulations like the GDPR push companies to list these vendors publicly, which is exactly<br>why sub-processor pages are a goldmine for competitive intelligence.<br>Let’s demonstrate this with a few live examples.<br>Sentry#<br>Sentry’s<br>sub-processor list shows that<br>it uses AWS and Google Cloud for its deployments.<br>Further, it uses OpenAI and Anthropic (and not Gemini) for AI/ML services.<br>OpenAI#<br>OpenAI’s<br>sub-processor list, among other things,<br>shows that it uses Snowflake for data warehousing and Pylon Labs for customer support.<br>Further, it uses Google, Oracle, Microsoft, and Amazon for cloud infrastructure.<br>Google#<br>Google’s<br>sub-processor list<br>shows that it uses Palo Alto Networks for intrusion detection and prevention.<br>Palo Alto Networks#<br>Palo Alto Networks<br>uses<br>Cloudflare for DDoS protection,<br>Datadog for monitoring, and SpyCloud for dark web searches.<br>It appears to use Anthropic (but not OpenAI) for LLMs.<br>SpyCloud#<br>SpyCloud<br>uses<br>AWS for hosting and Okta for identity management.<br>How to monitor a competitor’s SaaS stack over time#<br>The real advantage isn’t a one-time snapshot - it’s the change log. By tracking a<br>competitor’s sub-processor page and watching for updates, you can tell when they<br>Add a new AI/ML vendor<br>Switch cloud providers or add a second one for either a migration or reliability<br>Bring on a new customer-support, analytics, or security tool<br>Sub-processor pages are usually versioned or dated, and many companies let you subscribe to<br>change notifications. Bookmark the pages, diff them periodically, and you’ll spot shifts in<br>your competitors’ tech stack before they announce anything publicly.<br>Key takeaway#<br>Sub-processor lists are one of the most underrated sources of B2B competitive intelligence.<br>They’re public, accurate, and continuously updated. By reading the sub-processors of your<br>competitors - and monitoring the list for changes - you can map out exactly which SaaS tools<br>they rely on and when they change their stack.
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