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Dataflare vs PostHog

PostHog is an all-in-one product platform: analytics, replay, flags, experiments, surveys and more. Dataflare is open-source analytics that runs in your own Cloudflare account.

The short answer

PostHog is the closest product to Dataflare and does far more: surveys, a data warehouse, error tracking, mobile SDKs and a hosted cloud with a team behind it. Choose Dataflare if you want the core of that (web and product analytics, replay, flags and experiments) running in your own Cloudflare account, with no vendor, no usage-based bill and an agent that can query it from the first minute.

Side by side

Feature	Dataflare	PostHog
Where your data lives	Your own Cloudflare account (D1 and R2)	PostHog Cloud (US or EU), or your own servers
Source code	Open source, MIT	Open source (MIT, with some paid features under a separate licence)
What you pay	Your Cloudflare bill: $0 on Workers Free for small sites, $5/month Workers Paid above that	Free monthly allowance, then usage-based per product
Cookieless mode	Yes	Yes (configurable persistence)
Web analytics	Yes, with Core Web Vitals and errors	Yes
Funnels and retention	Yes: trends, funnels, retention, cohorts	Yes, extensive
Session replay	Yes, with a text transcript for agents	Yes, web and mobile
Feature flags and A/B tests	Yes: flags in your Worker, Bayesian experiment results	Yes
Raw SQL on your events	Yes, read-only SQL in the dashboard, CLI and MCP	Yes (HogQL / SQL insights)

Checked November 2026. Sources: PostHog pricing, PostHog self-hosting, PostHog licence. Spotted something out of date? Open an issue.

Choose PostHog if you want

Many more products in one place: surveys, a data warehouse, error tracking, LLM analytics, a CDP.
Mobile SDKs (iOS, Android, React Native, Flutter) and many server SDKs.
A hosted cloud with support, SSO and team permissions.
Years of production use at very large scale.

Choose Dataflare if you want

There is no Dataflare server: the Worker, database and recordings are in your Cloudflare account, under your contracts and your data region.
No usage-based bill from a vendor. You pay Cloudflare's list prices, which for most sites means $0 or the $5 Workers Paid plan.
Self-hosting needs no servers, Docker or ClickHouse cluster. One command deploys it, and CI upgrades it.
dataflare init writes agent instructions, a Claude Code skill and an MCP config, and every query result carries its SQL and a dashboard link.

Moving from PostHog to Dataflare

Run npx dataflare-cli init and add the script tag next to PostHog for a week, so you can compare numbers.
Rename posthog.capture(...) calls to glass.capture(...); event names and properties carry over unchanged. posthog.identify(id, props) becomes glass.identify(id, props).
Recreate your key funnels and retention charts in Insights, or ask your agent to (the MCP tools take the same shapes).
Move flags: posthog.getFeatureFlag(key) becomes glass.flag(key). Create the flag with the same key in Dataflare first.