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Technologies / PostHog / Pydantic Logfire

Companies using PostHog and Pydantic Logfire

6 companies in our data have public evidence for both PostHog and Pydantic Logfire, and 4 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

6companies use both
under 1%of PostHog users
60%of Pydantic Logfire users
4name both as subprocessors

Companies using one are 8.0 times as likely as the average company in our data to show evidence of the other.

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanyPostHogPydantic Logfire
Agatonagaton.aiAgaton analyzes customer conversations using voice AI to surface sales opportunities, retention risks, and quality issues.AI and machine learningCustomer support
dojodojoai.comDojo provides a workspace where marketing teams run brand, performance, and creative work together.AI and machine learningMarketing
Hedrahedra.comHedra serves multimodal and physical AI models with production inference and inference optimization, and builds custom models with customers through forward-deployed researchers.AI and machine learning
Semaloopsemaloop.comSemaloop provides agents that test mobile apps like real users across app flows.Developer tools
BEGLbegl.ioBEGL is a software tool that finds brand deal offers in a creator's email inbox and organizes the related research, contracts, deadlines, and payments in one place.Productivity and collaboration
GuruSupgurusup.comGurusup builds a Company Brain from a company's knowledge and deploys AI agents that execute tasks across its tools, teams, and channels.AI and machine learningProductivity and collaboration

The two technologies

PostHog

Analytics

PostHog is a platform that ingests and stores product analytics, errors, session replays, and business data so teams and their AI agents can query and act on it. It is used to answer product questions, investigate issues across tools, and give agents product context.

Summarized from posthog.com on 8 Nov 2026.

under 1% of the 1,774 companies we see using PostHog also show the other.

All 1,774 companies using PostHog1,123 name it as a subprocessorMore in Analytics

Pydantic Logfire

Observability

Pydantic Logfire is a full-stack observability and evaluation platform for AI agents, built on OpenTelemetry and framework-agnostic. It traces LLM calls, tool calls, database queries, APIs and custom code in one view so teams can debug, evaluate and improve AI applications in production.

Summarized from pydantic.dev on 8 Nov 2026.

60% of the 10 companies we see using Pydantic Logfire also show the other.

All 10 companies using Pydantic Logfire6 name it as a subprocessorMore in Observability

Industries

Among the companies above, by our own classification of their homepage.

AI and machine learning4Productivity and collaboration2

Other pairs

Companies with their own evidence for both.

More with PostHog

Cloudflare1,767companiesGoogle Workspace1,392companiesStripe990companiesNext.js848companiesAmazon Web Services826companiesVercel818companies

More with Pydantic Logfire

Cloudflare10companiesGoogle Workspace10companiesOpenAI7companiesGoogle Cloud6companiesWorkOS6companiesAmazon Web Services5companies

Questions

How many companies use both PostHog and Pydantic Logfire?

6 companies in StrataDB's data have public evidence for both, and 4 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use PostHog and Pydantic Logfire?

Agaton, dojo, Hedra, Semaloop and BEGL, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses PostHog and Pydantic Logfire?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using PostHog and Pydantic Logfire

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • 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