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You can now sync Clay data into PostHog. We hand made a clay hog to celebrate. That, along with 69 (nice) new changelog updates this month, can be found at posthog.com/changelog

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PostHog @posthog.com · 29/09/2026

Only going to conferences we can hire a magician for from now on

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PostHog @posthog.com · 28/09/2026

Who wouldn’t want explosive growth? Well, as it turns out, you.

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PostHog @posthog.com · 24/09/2026

Now having the raw numbers, she had the MCP and Claude sketch a few versions of each (prompt below). She used this as a de facto second validation pass too, since wrong numbers stand out a lot more once they're plotted. She then sent everything off to our graphics team, who made them look nice.

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PostHog @posthog.com · 24/09/2026

After the first few steps, she was ready to write the first draft.

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PostHog @posthog.com · 24/09/2026

Then, to help fact check, she asked PostHog in Slack to gather all of the context she'd need to better understand the product and its features.

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PostHog @posthog.com · 24/09/2026

She used the output to decide to focus on Session Replay. Next, she asked PostHog AI to pull the data she needed and create a notebook with her SQL queries that she could go back and reference.

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PostHog @posthog.com · 24/09/2026

First, to decide a topic to write about, she used our MCP to brainstorm with her. She gave her agent a few guardrails and let it rip with this prompt:

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PostHog @posthog.com · 21/09/2026

And my partner here, he wanna build a product. Why ain’t he talking?

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PostHog @posthog.com · 18/09/2026

Meet the team who made Replay Vision on Monday and ask them anything* *only questions off-limits are pineapple on pizza related; you can find those answers yourself. discord.gg/T3hadaysm?e...

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PostHog @posthog.com · 16/09/2026

What your parents see when you say you're building in public

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PostHog @posthog.com · 15/09/2026

Finally, evals feed into self-driving. Over the last 30 days, they have generated 127 reports and 14 fixes to issues they discovered, like PostHog AI not creating insights it said it did, the SQL tool failing, and sales briefs inventing people's names.

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PostHog @posthog.com · 15/09/2026

Evals don't just need to be pass/fail. For some, a majority of the traffic might not even be applicable. For example, ~90% of cases for our product grounding eval return N/A as it isn't making any factual claim at all.

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PostHog @posthog.com · 15/09/2026

Most people think evals = LLM-as-judge. We have these too. One example checks for unverified names in outreach briefs. LLMs often use the first name of an email as the name in briefs, which is wrong ~7% of the time. Having an LLM check helps avoid the embarrassment of saying the wrong name.

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PostHog @posthog.com · 15/09/2026

Evals can make LLMs more deterministic. Radu did this with eval-led test-driven development: 1. Create an eval for that reports check previous ones to avoid repetition. 2. Eval pass rate starts at ~0%. 3. Asks PostHog in Slack to fix what's failing his eval. 4. Eval now has a 100% pass rate.

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PostHog @posthog.com · 15/09/2026

Our most basic eval simply checks the sentiment of PostHog AI conversations. This makes it easy to identify and dive into negative traces to see where problems might exist.

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PostHog @posthog.com · 15/09/2026

A popular eval checks the performance of queries written by our execute SQL tool. There's no LLM involved. Checks use code to look for known anti-patterns in queries like positive leading wildcards or no timestamps. The team then knows how often these happen and can tune prompts to prevent it.

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PostHog @posthog.com · 11/09/2026

Thanks to Colin-Moran on GitHub, Max can now destroy your screen and any remaining hopes of productivity in rampage mode.

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PostHog @posthog.com · 11/09/2026

“I didn’t look at the code” has gone from 50 to 500 IQ statement

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PostHog @posthog.com · 11/09/2026

PostHog in Slack can now see uploaded images. You can ask it to examine data from them, give it extra context to do analysis with, or do this:

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PostHog @posthog.com · 10/09/2026

It reads at a pace no person can match. Since launch three weeks ago, it has watched 1,291,000 recordings. To get through that much yourself, you'd have had to start watching in 1975 and never stop.

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PostHog @posthog.com · 10/09/2026

So, we built Replay Vision. You tell it what to look for, and it reads every session for exactly that – scoring frustration, flagging dead-ends, classifying what users came to do, summarizing what happened, or answering any other question about your users you can put into words.

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PostHog @posthog.com · 10/09/2026

But that doesn't change the fact that the backlog is physically unwatchable.

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PostHog @posthog.com · 10/09/2026

Users can solve this by speeding up recordings, and many do (1 in 5 users jumps straight to 8x or 16x speed)

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PostHog @posthog.com · 10/09/2026

And that's what people chose to actually watch. Every single session unwatched could be hiding the one problem that decides whether a user stays or leaves.

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PostHog @posthog.com · 10/09/2026

The average Session Replay recording is 28 minutes, long, and the median view time is 17 seconds. The typical viewer watches 1%, then moves on.

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PostHog @posthog.com · 08/09/2026

Token spend is down, legal fees are way up.

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PostHog @posthog.com · 04/09/2026

Please stop asking if it's "average sized", that's rude

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PostHog @posthog.com · 03/09/2026

He’s been watching your session the whole time.

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PostHog @posthog.com · 02/09/2026

Aviation’s final frontier: eggplant blimp

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PostHog @posthog.com · 02/09/2026

The aubergine is airborne, San Francisco.

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PostHog @posthog.com · 01/09/2026

Taking bets on who would win in a fight to the death between our original and current logo

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PostHog @posthog.com · 01/09/2026

Our Secret Master plan is: - Ship every tool and all the data that engineering teams need to understand their product and users - Use that to speed up the cycle of shipping -> observing -> iterating - Automate the entire cycle We're open source, so you can see all of our code: github.com/PostHog

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PostHog @posthog.com · 31/08/2026

Psssst. You look like a shipper. Wanna know good stuff shipped on the low at PostHog this month? C'mere, lemme show ya. 65 new changelog updates for you to choose from, straight from the source. You like new Data Warehouse sources? How about 105. 125 new MCP tools, too. posthog.com/changelog

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PostHog @posthog.com · 28/08/2026

Explore the rest of the Förvarning collection at posthog.com

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PostHog @posthog.com · 28/08/2026

"Until it clicks", get it?

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PostHog @posthog.com · 28/08/2026

All parts come included, unlike with furniture, which will always be missing a screw.

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PostHog @posthog.com · 28/08/2026

Once assembled, it looks great inside your product!

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PostHog @posthog.com · 28/08/2026

Proof even mascots get camera shy

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PostHog @posthog.com · 26/08/2026

Even marketing gets their own special sources, like Google Sheets, Google Search Console, Google Ads, and Dub. These feed marketing analytics, influencer marketing ROI, and our content growth review dashboard. Here's which unbranded queries drove the most clicks last month:

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PostHog @posthog.com · 26/08/2026

Sales gets their special tables with Vitally and Salesforce synced. This lets sales track their book and capacity as well as do planning based on load. It's because of this that we know we need to hire more CSMs. (go apply).

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PostHog @posthog.com · 26/08/2026

A similar area is DoIt, which lets us do cost allocation for AWS and GCP. This is critical to understanding our (large) spend with these providers and calculating margins.

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PostHog @posthog.com · 26/08/2026

As a team shipping an increasing number of PRs each month, DevEx is increasingly critical. We get engineering analytics to improve it by syncing GitHub. This lets the DevEx team monitor code review bots and see CI health, like the % of PRs where all checks pass in the first attempt.

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PostHog @posthog.com · 26/08/2026

Maybe our most important source is Postgres. We sync both our production data and billing databases in PostHog, which lets us do things like: - Track revenue, growth, and churn. - Billable usage per product and customer. - Metrics from our product database like insights from warehouse sources

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PostHog @posthog.com · 26/08/2026

Our biggest source is Temporal. We sync over 3 billion rows from it. We use them to find out how jobs are performing and how much they cost which lets us evaluate unit economics. The batch exports team even uses it to look at execution times for specific exports.

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PostHog @posthog.com · 26/08/2026

Our most popular source overall is Stripe. Although we keep much of our billing and revenue data elsewhere, we still use it. One way is to keep track of our startup plan, doing things like looking at the number of customers with the startup plan label over time.

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PostHog @posthog.com · 20/08/2026

Number go up, now in Slack. You can now create native charts with the PostHog Slack app.

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PostHog @posthog.com · 19/08/2026

Today's youth deserve the chance to fall in love with AI-first B2B SaaS products. That's why we made the PostHog coloring book. Before you know it, your little tyke'll be talking about shareholder value (productive) instead of horses and fire trucks (wasteful). posthog.com/coloring-bo...

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