Impact Theme (OS 2.0) vs. Horizon: Best foundation for a new store?

Hi everyone,

I’m launching a new health & lifestyle brand in Germany and need advice on our store’s technical foundation.

I am torn between using a proven OS 2.0 premium theme (specifically Impact) or jumping straight into the new Horizon framework. Visual storytelling and fast performance are critical for us, but seamless compatibility with local European/German apps (invoicing, GDPR compliance, shipping) is an absolute must.

Quick questions:

  • Is it a step backward to build on OS 2.0 (Impact) for a brand-new store right now?

  • Is Horizon fully stable for a live production environment?

  • Have you run into any major third-party app compatibility issues with Horizon?

I’d love to hear from anyone who has recently made this choice. Thanks!

Pretty sure you mean Hydrogen, not Horizon (Hydrogen is Shopify’s headless framework).

To answer directly: OS 2.0 is definitely not a step backward. It’s the standard that 99% of successful stores run on. Impact is a solid, fast theme.

If you go with Hydrogen, you will absolutely run into app compatibility issues. Most standard Shopify apps - especially local German GDPR banners, invoicing, and shipping apps that inject frontend code - don’t work out of the box with headless setups. You’d have to build custom API integrations for almost everything.

Unless you have an in-house dev team and a massive budget, stick to OS 2.0. Launching a brand is hard enough without the technical headache of a headless build.

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Just test it

OS 2.0 is the newer architecture, how would it be a step backwards.
Horizons been in production for a long time now including all it’s free offshoot themes used by thousands+ of merchants.

If you can’t be specific from the jump these are the type of vague go nowhere questions born from either not investing the proper amount of time to learning about themes, unwillingess to just go and do the testing, or not delegating properly to an expert.

Every app has some sort of hiccup , one theme can’t be everything to everyone for every app possible.
Even if you use a premium theme do you think that comes with some sort of guarantee the themes developers will do any integration fix under the sun.

This line of thinking is not how to approach theme selection.

Horizon is a free theme, just GO AND TEST IT.
If your process is so fragile that testing a theme is a risk that is a broken process and that’s the issue to fix.