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Appstem

San Francisco product agency designing and engineering mobile and web apps

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About Appstem

Appstem is a product design and development agency in San Francisco. It has worked since 2010 and says it has launched more than 250 digital products. One senior team handles strategy, design, engineering and quality, from the first question to later releases. It pairs small-studio attention to detail with the range of a larger agency.

What Appstem offers

  • Product strategy — testing ideas and defining what a first version must do.
  • Experience design — research-led UX and UI.
  • Engineering — native iOS and Android, React Native and web platforms.
  • Quality and growth — QA, release management and ongoing support.

Who it works with

Clients are Fortune 500 brands and ambitious start-ups.

Key facts

  • Based in: San Francisco, USA
  • Founded: 2010

Profile written by TrustList from the business's own published information, Oct 2026.

Categories & features

Rankings

As of 2026-10-06. Organic ranks only; sponsored placements are never ranks.

What the business tells TrustList

Founded
2010 (16 years) evidence sent

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