Companies using Photon and PostHog

3 companies in our data have public evidence for both Photon and PostHog, and 2 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.

3companies use both

50%of Photon users

under 1%of PostHog users

2name both as subprocessors

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

Company	Photon	PostHog
Adaptadapt.comAdapt provides company agents and the infrastructure to run them, including an open-source agent runtime, sandboxes, storage and a model gateway.AI and machine learning Developer tools
Caddycaddy.appCaddy is an AI assistant that users text through iMessage or RCS to manage calendars, reminders, messages, and tasks.AI and machine learning Communications
athletedataathletedata.healthathletedata provides an AI coaching service that combines training data from apps and devices like Garmin, Apple Health, Whoop and Oura into a plan that adjusts to the athlete.AI and machine learning Consumer apps

The two technologies

Photon

Email and communications

Photon is a native Mac app for overlaying multiple calendars in any timezone and sharing your availability with others. It is used to quickly format a message showing when you are free to meet, without sending calendar event details to external servers.

Summarized from withphoton.com on 8 Nov 2026.

50% of the 6 companies we see using Photon also show the other.

All 6 companies using Photon 5 name it as a subprocessor More in Email and communications

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 1,763 companies we see using PostHog also show the other.

All 1,763 companies using PostHog 1,118 name it as a subprocessor More in Analytics

Other pairs

Companies with their own evidence for both.

More with Photon

Cloudflare6companies

Anthropic5companies

Stripe5companies

Questions

How many companies use both Photon and PostHog?

3 companies in StrataDB's data have public evidence for both, and 2 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 Photon and PostHog?

Adapt, Caddy and athletedata. Each one links to the evidence behind it.

How does StrataDB know a company uses Photon and PostHog?

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 Photon and PostHog

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