Does 3RD use PostHog?
Yes
We hold strong evidence for this.
- The company names it in its own subprocessor list, a statement that this vendor handles its customers' data.
How we know
About 3RD
3RD is an AI visibility platform that shows marketing teams where AI assistants choose their brand or a competitor and drafts fixes for them to approve. It serves marketing teams and the teams around them, including brand, content, PR and comms, SEO and digital, eCommerce, and agencies.
Summarized from its homepage on 10 Nov 2026.
What else 3RD uses
3RD has evidence for 14 vendors. The strongest:
Other companies using PostHog
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- Every company and vendor, with its public source
- 100 API calls a month, plus MCP and the Chrome extension
- Work email only. No card, no sales call