Sandro Zweig

Co-Founder and CEO at

[Nikolaos Christoforakos @NikChr1414]

Wow, what an honor. 😲😲

Product Hunt just featured @tiun_io in a post on X.🥳🥳🥳

It means a lot to see our product get this kind of support from both the Product Hunt and X communities.

Really grateful for everyone who supported us.🙏🙏

[Nikolaos Christoforakos @NikChr1414]

introducing tiun: auth, billing, payments, customer data, and analytics in one system for AI and SaaS builders

built after 150+ founder conversations, tested with nearly 1000+ builders, and now live on Product Hunt

[Product Hunt 😸 @ProductHunt]

Make earning easier
https://t.co/azJuAIv7T5

[Product Hunt 😸 @ProductHunt]

If you've ever tried to make internet money, you know it can be a pain to setup the infrastructure to make it happen.

Meet @tiun_io, the Auth, billing, and payments for AI builders.

[Sandro Zweig @SFZweig]

This is huge! We're fighting for the top spots on Product Hunt today!
https://t.co/kQNYzPx58D
Your support can make all the difference right now 🦄 Let's finish strong!

[Sandro Zweig @SFZweig]

🚨 We’re launching on Product Hunt today! 🚀
We’ve worked really hard for this day, so we’d love your support and feedback: https://t.co/XkW1ziQkLu

And yes, you can barely see what’s on the screen Chris is holding. That’s by design 😃 You’ll have to go look for yourself.

We also made a video explaining what tiun actually does. Now my mum also gets it. See you on Product Hunt! 🫡

[Sandro Zweig @SFZweig]

Where should I incorporate my startup - Zurich or Zug?
The post about why we're building tiun from Zurich went further than I expected. What surprised me was not the reach, it was the inbox. Almost none of it was "nice post." It was people asking questions like: How did you decide where to set up? What do I need to look out for?

And one question came up more than all the others combined. Zurich or Zug?

So here is the honest version, including the parts that do not favour the choice we made.

The case for Zug is the tax, and it is a serious case. Just under 12% effective corporate tax against just under 20% in Zurich. On a million in profit that is roughly 80k a year, every year, and anyone waving that away has never had to make payroll.

The number people forget is the personal one. Top marginal income tax is around 22% in Zug city against around 40% in Zurich. That is not eight points, it is closer to eighteen, and it comes out of your own salary rather than the company's profit.

Setup is fast, the administration is pragmatic in a way that surprises people, and it is 25 minutes from Zurich on a lake with mountains behind it. Anyone telling you Zug is a compromise on how you live has not been to Zug.

The case for Zurich is talent density and everything unplanned. ETH is here. Google runs its biggest engineering site outside the US here. OpenAI, Anthropic, Nvidia and Microsoft have all set up here. The intro you did not ask for. The coffee that turns into a hire eight months later.

Though Zurich founders oversell this. If you are building something people genuinely want to work on, they will do 30 minutes on a train without thinking about it. Great companies pull talent toward them. "The engineers are here" is a weaker argument than we like to admit.

The variable almost nobody mentions is where your clients are.

If you sell to clients in Zurich, found in Zurich. Being in the room beats eight points of tax and you will feel it in year one. If your clients are spread across Europe, proximity buys you close to nothing, and it collapses into a straight weighing of tax, setup, talent and how you want to live.

We founded in Zurich. We started out of the ETH Student Project House and were backed from the beginning by the Founderful Campus Fund. That was not a tax decision, it was where the thing actually began.

One correction to something I hear constantly, because it is now wrong: the Zug mailbox does not work anymore. There has to be real substance behind the address, which means part of management genuinely sitting there. What it does not prevent is keeping a second office in Zurich for the team. That combination is legitimate and more founders should know it.

Would I consider moving, the company or myself? Honestly, yes. The tax argument only starts mattering once you are profitable, and before that you are optimising a number that is currently zero. But it does start mattering, and pretending otherwise is just Zurich pride.

[Sandro Zweig @SFZweig]

week 3 of https://t.co/xbLJESLNrv and 300+ builders and founders are currently shipping.

nobody tells you that until you have to press publish 🙃 but building is the easy part (especially with @tiun_io)

this week is all about getting real feedback from real users.

[Sandro Zweig @SFZweig]

did not have live mma ppv on my bingo card LOL

this weekend THE CAGE MMA #9 took place. The @movact team took it live to thousands of viewers via https://t.co/546vXaxSsr, selling access to the premium fights.

built with @lovable + @tiun_io - view single fights now on demand at: https://t.co/7to8aESSm4

[Nikolaos Christoforakos @NikChr1414]

We knew the hackathon would be fun.

We didn’t expect this level of ideas.

209 builders are already shipping some really cool products.

You can still jump in. $5k prize pool, up to $10k + perks.

https://t.co/wKR3rBwSgo

[Sandro Zweig @SFZweig]

I’ve always found that working out does something to my head that sitting at a desk for another hour never will.
It’s also why I admire people who’ve done competitive sports — not because of their athleticism.

You learn a few things very early:

Showing up when you don’t feel like it.
Building a routine.
Pushing through plateaus.
Wanting to get better every day.
And trusting that consistency eventually turns into progress.

Turns out those are pretty useful traits when building a startup too.

You come back clearer, more focused, and usually with a solution to whatever you were stuck on before.

We try to make this part of the culture at tiun. — not something you have to squeeze in around work.

Workout classes are covered as a company benefit, just like team lunches, and dinners.

I think companies underestimate how important this is when hiring great people.

This way we create an environment where people (who want to compete and be the best) can consistently perform at their best.

For me, a 10k lunch run always works its magic.

[Sandro Zweig @SFZweig]

@lightsilver323 https://t.co/9dQdExvvpD AI-native backend

[Sandro Zweig @SFZweig]

@tiun_io let's goooooo!!

[Sandro Zweig @SFZweig]

built a full project over the weekend with this and I'm still a bit stunned. type 'integrate tiun' and the backend just comes together: auth, payments, database, analytics. the part that used to eat my first week(s), done in minutes. I'm biased, sure. but this is the most convinced I've been that we're onto something.

[Sandro Zweig @SFZweig]

we asked 150+ ai founders: what do the winners of tomorrow focus on today?
99% said the same thing. build your core product. focus on distribution. hand everything else to ai to stay lean. i agree with all of it. but almost nobody does it. us included, for a while. because "everything else" has a name. the work every product needs to turn the lights on, and nobody likes doing. auth, payments, a customer database, analytics, reporting.. the list goes on. and it isn't a skill gap. 79% of the ctos we interviewed can build any of those pieces. the hard part is making them work together, then keeping that logic alive as the product grows without breaking it. i hit this wall constantly in my own side projects. payments for an ios app without in-app purchases: days gone on config. a whatsapp subscription bot where the entitlement logic became its own project. none of it was hard to build. it was hard to connect and keep correct. so we're building tiun. an ai-native backend that ships already connected. spin up the whole thing in minutes instead of weeks. in a few months we'll wonder why we ever did it the other way. habits just move slower than tools. if you're building in this space, let's compare notes.

[Sandro Zweig @SFZweig]

@rauchg couldnt agree more G

[Guillermo Rauch @rauchg]

Everyone is now a programmer, because the present and future programming language is your natural language. If you can write or speak, you can build. This is the most important evolution in our field since its creation. And it's a tsunami that has *just* started.

[Nikolaos Christoforakos @NikChr1414]

After interviewing 80+ early stage founders, we built Auth, billing and customer management in one stack.

For founders who want to ship fast, not wire infrastructure.

We are boring in the best way & the only stack you need to turn an idea into revenue.

Closed launch, request access for invite.
Waitlist live ���️

[Sandro Zweig @SFZweig]

tiun skills + MCP are live. install the skills on your AI platform, connect the MCP, and your backend is done: auth, payments, database, analytics.

[Sandro Zweig @SFZweig]

we made project of the week on @Peerlist . grateful for the response from the dev and indie hacker community. means a lot coming from the people actually building.