Training our own AI models

(posthog.com)

136 points | by tartieret 2 hours ago ago

95 comments

  • JimDabell 2 hours ago ago

    “Opt-in by default” is an oxymoron. If it’s default then I haven’t opted into anything. It’s been enabled by default.

    • xnorswap an hour ago ago

      This frustrates me too, if something is "opt-in", that means by default you're not included and can choose to be included. If something is "opt-out", that means you're included and can choose not to be.

      But then it gets used to describe the reverse, and we have to add words to clarify.

      I once saw a post here with a correctly described opt-in telemetry before, and the top comment here was attacking them for the reverse, thinking it was including them by default, so there's little winning, it's one of those words that has just come to mean it's opposite.

    • irishcoffee an hour ago ago

      You were given the option to option in, by default. Clearly it makes sense, optioned out by default only happens when someone loses money on the option in default instead.

      The internet really stinks. The 1999 teenager in me somewhere is really bummed.

    • deflator 2 hours ago ago

      Very true. I was considering PostHog, but this sours them in my eyes. Very deceptive wording.

      • skrebbel an hour ago ago

        They could’ve done a lot worse, and most companies would’ve.

        • deflator an hour ago ago

          There's a helpful response. It could always be worse!

    • mannanj an hour ago ago

      Isn't it kind of like mandatory tip? If you haven't given it voluntarily, i.e .its automatically opted-in and you maybe can't even not give it. its the same.

      • abustamam an hour ago ago

        Many restaurants have the audacity to add a 20% (or whatever percentage) "service fee" that isn't considered tip. It even says something like "we use this to pay our staff competitive wages and health insurance." You can't opt out. It's just part of the bill. Then they have the gall to ask for a tip on top of that.

        I've taken to a) leaving a negative Google or yelp review for such establishments and b) never coming back. This is a practice that needs to die.

        • rectang 42 minutes ago ago

          Do you leave a negative review if they add the service charge but don't ask for a tip?

          • abustamam 41 minutes ago ago

            I've never had the pleasure of encountering that situation.

            But at what point do we call a spade a spade and say it's just them secretly inflating their prices? "everything is a penny but we charge a 1000000% service charge"

            • rectang 38 minutes ago ago

              I used to wait tables once upon a time and it was standard practice to add a fixed service charge for any large party in lieu of a tip. Have you really never encountered that?

              • abustamam 35 minutes ago ago

                I've encountered large party service charges and that makes sense because it usually requires staff to do stuff they wouldn't normally do for smaller parties.

                I'm talking about restaurants that just add service charge to everyone.

                • rectang 7 minutes ago ago

                  I think the lesson from the airline industry is that while consumers will get angry about surcharges, pricing transparency is what really gets punished in the marketplace. There are enough consumers who will always buy the deceptively priced item that it's suicidal to tell the truth (absent government regulation forcing the issue for all purveyors).

                  There are a fair number of well-meaning restaurateurs who have tried no-tip policies for ethical reasons. But the mass marketplace has not changed.

      • croes an hour ago ago

        Opt-in by default means it is either mandatory (if you can‘t disable it) or it‘s opt-out (if you can) Opt-In by default is BS to make it sound less invasive

        • abustamam an hour ago ago

          Imagine if they said paying taxes were opt-in by default. No, it's mandatory! Sure you can technically not pay taxes but you won't have a good time.

          • _heimdall 32 minutes ago ago

            That is slightly different though. The government says you must pay taxes, mandatory as you said.

            PostHog here is saying they will train on your data but opting out is allowed. For the taxes analogy to work, PostHoh would not offer the opt-out option at all and you'd be doing something like hacking their system to filter your data out on their end.

  • Waterluvian an hour ago ago

    PostHog was a system we set up once, generally don't think about, and review from time to time, providing some occasional value. It was mostly harmless to leave around.

    But it's apparently yet one more thing we have to be actively suspicious of as it defaults towards an intolerable state. So it's easier to just rip it out of the system and move on.

  • sixtyj 2 hours ago ago

    Most companies would bury this change in a deceptively boring T&Cs update, but we value transparency, so here's what you need to know in an internet-friendly numbered list:

    Users on our EU cloud instance are opted out by default

    So too users with agreements that prevent training (e.g. BAA, MSA, or similar)

    All other users on our US cloud instance are opted in by default

    We will anonymize all data before it's used for training

    We will only use data that already exists in your PostHog instance

    We will do all the model training ourselves, which means...

    We won't sell or send your data to third-party model providers

    You can opt out at any time via your org settings in PostHog (admin access required)

    Training won't start until June 29, so there's plenty of time to decide

    • teraflop an hour ago ago

      > All other users on our US cloud instance are opted in by default

      Cool, cool. Glad to see that you are the arbiter of what your users have "opted" to do, and their input isn't required.

      While we're at it, I'm going to "volunteer" your time to rebuild my patio this weekend. You don't need to worry about volunteering, I've done it for you.

    • mark242 2 hours ago ago

      If "we will opt everyone in because otherwise we won't get enough data because we know users won't opt in" is your business model, maybe it's time for a rethink.

      • micromacrofoot an hour ago ago

        this is the business model of all companies training AI, if they had to get permission we wouldn't have frontier LLMs at all

        • abustamam 44 minutes ago ago

          So it's OK to do stuff without permission as long as we get something that makes a lot of people a lot of money?

          • skupig 25 minutes ago ago

            It's not OK, but it's a fact.

          • ajcoll5 30 minutes ago ago

            *"that makes a select few rich people a lot more money?"

      • rottencupcakes 2 hours ago ago

        Defaults matter.

        Opt-in vs opt-out organ donorship has a large impact.

        Most people on any web app won’t stray from the defaults.

        • hyperbovine an hour ago ago

          I sincerely hope this never comes to pass, but you or your loved ones may someday find themselves in the position of wishing more people were opted in for organ donation.

          The same cannot be said for some random corporation training AI models off your data to make a buck or two.

          • codersfocus an hour ago ago

            I think it might be better to get rid of the organ *donation* system entirely.

            Organ transplant surgery costs hundreds of thousands of dollars, yet donors get zilch, which is completely unfair when everyone else in the value chain gets paid.

            If instead it was "allow my organs to be sold for my estate" I think the supply of organs would greatly increase, which would be win/win.

            • micromacrofoot an hour ago ago

              there are a number of problems with people selling their organs for profit, it's a perverse incentive — the people in the chain who otherwise get paid don't get paid for the organs, they get paid for the labor of doing their jobs

        • mmh0000 an hour ago ago

          Which we probably need to consider changing now that some truly bizarre and evil shit is being done on donor organs:

          https://news.ycombinator.com/item?id=48212992

          • abustamam 37 minutes ago ago

            Off topic but I'm curious what's evil about that article. Bizarre, sure, but evil? They took a brain (an organ) from a dead person who had previously given consent to use their organs for that purpose.

            • mmh0000 29 minutes ago ago

              I think most people, and definitely myself, when they sign up to be an organ donor, they think of the liver, kidney, and heart. Things that will help other people.

              Not the brain, the center of conscience, being kept in some sort of horror-movie half-alive state. I do not think we understand consciousness enough to rule out what those brains are experiencing.

        • philipwhiuk an hour ago ago

          Again, this is because it's uninformed.

          Consent matters.

        • cjonas an hour ago ago

          yea except one is a "dark pattern" to exploit customers for corporate profit while the other is to benefit society.

      • freshnode an hour ago ago

        It's frustrating as we literally just moved to it. Back to Mixpanel?

        • abustamam 36 minutes ago ago

          I'd recommend at least doing a short spike to see if you can build your own in some way. We did that for the purpose of experimentation and now we've built our own metrics platform that we completely own.

    • hilariously an hour ago ago

      There is no such thing as opt in by default - and burning that amount of customer goodwill because you want something instead of say, giving a discount to people who are willing to do it is a choice for people who have a lot more market share and their customers would have more trouble leaving.

    • infecto an hour ago ago

      > Most companies would bury this change in a deceptively boring T&Cs update, but we value transparency, so here's what you need to know in an internet-friendly numbered list:

      This feels like a really bad defense. It’s great you provide transparency but I don’t want my analytics system writing my code. There are already so many other first movers that are better that I would rather connect to your analytics.

    • buzer an hour ago ago

      > We will anonymize all data before it's used for training

      Anonymize by what definition? GDPR? Do note that this very high bar.

      > All other users on our US cloud instance are opted in by default

      Including end users in the EU? You should remember that you are obtained the personal data directly from data subject meaning Article 13 obligations apply. Article 13 omissions cannot be cured retroactively. Can you show all of your customers have provided sufficient Article 13 notice to cover this processing?

      And do note that you are almost definitely within the scope of 3(2)(b).

    • _heimdall 30 minutes ago ago

      > We will do all the model training ourselves

      That's actually an interesting note. So you all will be managing the training runs on hardware you own or rent and manage?

    • tartieret 16 minutes ago ago

      There is definitely some confusion on the EU part. I am a European citizen, but some of my activity data on some of the sites I host is logged in US Posthog, which means Posthog is subject to the GDPR, even if the data is US hosted!

    • ryanmcbride an hour ago ago

      Hey man, respectfully, opt-in by default is not opt-in. That's opt-out, and it's scummy.

      I feel like you either know that already, or should, but either way I won't be using your product anymore. Just pulled it out of the projects I'm personally in charge of and in the future I'm going to recommend against using it both internally and for clients.

      Legitimately disappointed.

    • kelsey98765431 an hour ago ago

      Cant wait to see posthog crash and burn, i have hated their service for years now.

    • GuinansEyebrows an hour ago ago

      > All other users on our US cloud instance are opted in by default

      This is slimy.

      • xnorswap an hour ago ago

        It's slimy because your government allows it, this doesn't have to be the case.

        1. Lobby your representatives to improve your data protection laws, even if you think it's pointless to do so

        2. Stop attacking EU data protection laws, even if they inconvenience you

        As can be seen from this announcement, data protection laws do make a difference.

        • ryanmcbride an hour ago ago

          I don't want to support a company that's going to do everything they can possibly legally get away with, I want to support companies that do the right thing where they can.

        • osigurdson 40 minutes ago ago

          What concrete difference is being made here? If a site is hosted in the US but accessible by EU citizens AND using a PostHog US server isn't the data still being used for training?

          Legitimate question, I am not trying to prove a point.

        • mrweasel an hour ago ago

          Not really, it's slimy because it should be obvious that it's the morally wrong thing to do. There's no tangible benefit to the users, only risk.

          The fact that they only opt-out EU users, because regulation forces them, tells you all you need to know about the moral compass of PostHog.

          This shouldn't even require regulation, but apparently expecting companies to act morally is a bloody pipe dream. Profit over morals and concerns for your costumers, apparently.

        • GuinansEyebrows an hour ago ago

          yes, of course!

  • Dave_Rosenthal 27 minutes ago ago

    They say, "our goal here is to improve PostHog as a product for our customers, not to expose or sell models trained on your data" but then don't actually list that as a limitation in the bulleted points.

    AFAICT this now gives them default permission to train an LLM on your code (as Posthog telemetry data is inextricably tied to your code) use it, and even sell it if they wanted to (as it's not your data anymore, it's their model). Yikes.

  • frankest an hour ago ago

    What a great reminder to build my own analytics and self host. PostHog just lost a customer. They could easily send a email to each customer asking if we want this. The assumption means they have no product intuition about their own customers, let alone the customers of their customers. Bye.

    • xrd an hour ago ago

      Not trying to be snarky but why not just opt out instead of vibe coding your own analytics platform? I'm uncomfortable with people using my data to train AI, but those concerns revolve around where my data goes, and whether I'm notified/aware. Posthog is giving me good answers to those questions here.

      • frankest an hour ago ago

        It has to do with the priorities of the company and its leadership. Either they lack the basic awareness to know that training on your business customers data will likely leak their sensitive information to their competitors, or they just intend to sell that data. We are not paying to have our data stolen.

        • xrd an hour ago ago

          Very fair point!

  • infecto an hour ago ago

    Thanks for posting. I had been in the fence for the past few months of switching. The new AI products combined with the weird UIs had been irking me for a while. This is the final nail in the coffin. Opt-in is a terrible business model imo.

    • thecatapps an hour ago ago

      Agreed. While I don't entirely care enough to rip it out of any existing products, I certainly won't be adding it to any new ones.

      I remember people cheering about their "OS" web redesign, which was the most confusing and unnecessary UX complication when I needed to go track down a session replay to debug something (They've since added navigation to the top right.)

  • tines 2 hours ago ago

    “Opt-in by default” = opt-out?

    • Tsarp 2 hours ago ago

      Guess its "Opted-in" by default

      • natch an hour ago ago

        Then it’s not opted. It’s just in.

        • patates an hour ago ago

          "Possible to somewhat disable", I call it "PTSD".

    • mrits an hour ago ago

      Opt means to make a choice or select an alternative. They are either incompetent or lying on purpose.

  • brauhaus an hour ago ago

    Every day I'm more glad about EU legislation, that's all I have to say for now

    • gobdovan an hour ago ago

      Yeah, the legislation is morally defensible on its own terms. But when you look at the full system, something funny happens: EU legislation is blocking data extraction and platform lock-in tactics that Big Tech already used to become monopolies.

      And since the big platforms don't have to unwind their advantages or pay back for the methods that are now restricted and considered illegal, they can peacefully extract rents from their entrenched positions for even longer, while everyone else is prevented from using the same ladder they climbed.

    • vovavili an hour ago ago

      ...until you learn the rates of economic development between Europe and the US since 2008.

      • Laurel1234 36 minutes ago ago

        Every last single cent of that "economic development" is in the hands of billionaires, at least people in Europe have rights and their government isn't a couple of monopolies in a trenchcoat.

  • abustamam an hour ago ago

    > Why this is opt out, not opt in

    > Put simply, because otherwise we will not have enough data to train a model that's actually useful.

    AKA we won't be able to make as much money if we required you to give us permission to use your data.

  • rad_val 23 minutes ago ago

    All of them do if you don't do something about it(e.g. migrate to self hosted solutions), trusting a ToS in 2026 is as naive as it gets.

  • freshnode an hour ago ago

    Why won't companies explain what anonymisation means for them?

    Posthog has unfettered logged in access to some sensitive stuff. What steps are they actually taking to scrub sensitive data from my replay before being used to train a model?

    • tartieret 44 minutes ago ago

      this is what triggered my post. The announcement pretends that it's not bug deal because of "anonymization" but that's easier said than done. You can send custom events and logs that contain confidential information even if it doesn't contain personal identifiers

  • thecatapps 38 minutes ago ago

    It's probably very obvious by now, but there's something to be said about companies with the "SF Quirky" vibes:

    - The OS Redesign

    - "Sexy Legal Documents"

    - Emails with "<relevant hedgehog meme goes here>" as the subject line

    - Having a merch shop with action figures of your CEO

    It works both ways. When you're looking for adoption and making very pro-user moves, I guess it can be a benefit. However, when you're now looking to grow revenue and making very anti-user moves, it's insult to injury.

    I'm the last person to say that tech "shouldn't be fun" or something overly-broad like that, but if your messaging doesn't match the decisions of leadership, you're gonna have a bad time.

  • the__alchemist an hour ago ago

    How much are they paying the users?

  • ASinclair an hour ago ago

    Mostly unrelated but the name of this company makes me think it's a Dick-Pics-as-a-Service provider.

  • stevoski 17 minutes ago ago

    I’ve been evaluating PostHog for our company.

    I’ve now made our decision. We won’t be using them.

    If they are going to position yourself as the non-slimy no-BS guys, they can’t pull this nonsense.

  • mrcwinn an hour ago ago

    Gross.

    They’ll use your product and your data to later sell a product back to you.

    • xp84 25 minutes ago ago

      Even if there were no AI, that's not any different than any SaaS where your data gets stored. Picking at random, Optimizely certainly has a ton of interaction data available and they build new features and products that leverage your data (without which the features would be impossible). Could be reporting tools, funnel analysis, etc.

  • gyoridavid an hour ago ago

    I feel that the US should step up their legislation game and make sure these companies can't retroactively make rules to steal their users data. I know it's trendy to hate the EU but their legislation actually protects the users, and not the companies interests.

  • jen20 an hour ago ago

    Perhaps if they hopped on a quick call for five minutes with some customers, they'd realize quite how little appetite there is for putting up with being opted into things automatically in the US but not in the EU.

    As an aside, this also means the EU rules are working.

    • freshnode an hour ago ago

      +1 this made me glad we opted for the EU region

  • bigstrat2003 2 hours ago ago

    This is the fastest way possible to ensure I will never do business with you, or stop doing business with you if I already am.

  • tartieret 2 hours ago ago

    I initially used Posthog as an alternative to Google Analytics with more privacy. Now they want to use the data for a business purpose. Working hard towards enshitification?

    • rvz 2 hours ago ago

      > I initially used Posthog as an alternative to Google Analytics with more privacy.

      This does not make any sense.

      > Now they want to use the data for a business purpose.

      They raised VC money and they want a return so this was predictable.

      • mrits an hour ago ago

        It makes perfect sense actually

  • Henchman21 2 hours ago ago

    You can’t “opt-in” to something that is the default. The choice is made for you — and when the choice is made for you? You haven’t opted in or out?

    • scosman an hour ago ago

      I would have guessed that was just a bad title here but no, article states it as "opted in by default".

      • tartieret an hour ago ago

        I fixed the title, sorry for the typo!

        • scosman 31 minutes ago ago

          not your fault, the article uses that language!

  • calmbonsai an hour ago ago

    LOL. You stay classy PostHog.

  • dzonga an hour ago ago

    another would be excellent product company destroyed or being destroyed slowly due to VCs and the ever chase for 'growth'

  • mikkelam an hour ago ago

    The enshittification has begun. Time to move on!

  • TZubiri an hour ago ago

    Today I was thinking, if I start a company in the LLM tooling space, I would put in the company mission in the incorporation documents that client data will not be used to train.

    The temptation and the value is too great, and the opt-in opt-out consent thing ends up being a fuckery where the company tries to trick the user into allowing them to take a look into the data, presumably because they are selling the product at a loss and need an alternative revenue model.

    Just make it impossible from the get-go, the fine print would be that the data can be shared off-band explicitly, in an email, or if explicitly copy pasted in a support chatbox, but there would be no mechanism for us to read the data from the databases much less from the client.

    I don't mean it would be an air-tight mechanism like Signal or ProtonMail, if a court order would ask us to produce client info, we would still reserve the right to produce the data, but exceptionally, and definitely not for training models.

    • OkayPhysicist an hour ago ago

      More companies need to make, for lack of a better term, "oaths" of what they won't do as a company. My pitch on it is to tie it to financial penalties the company agrees to pay, somewhere in the "enough to incentivize a significant portion of our user base to sue us" territory, such that it would be financial suicide to violate them.

      • TZubiri an hour ago ago

        Contracts ad incorporations are designed for this, the issue is that the incumbent legal strategy is to use template documents, and to reduce potential disputes to 1$ in private arbitration, essentially legal's job is to make legal go away.

        Another term I would incorporate is a Seppuku term, if we get hacked, I resign, the company goes bankrupt. Anything else is the wrong attitude to computer security for companies that want to scale to Global reach.

  • slopinthebag 2 hours ago ago

    PostHog better transition to an AI company soon because they are one of the SAAS's which are absolutely cooked by vibe coding. What it does is extremely amenable to LLMs and it's also non-critical for a business, making it an excellent candidate for replacement by in-house solutions. And if it means never having to use their website again that's even better.

    I wonder if they regret opensource, considering people will be using LLMs to replace them which have surely trained off of their code.