Galio

Galio is an open-source framework that consists of interfaces and features used to develop mobile applications. In practice that means designing and building iOS and Android apps.

The natural audience is businesses launching or rebuilding an app. Related areas on their profile: Mobile Apps. They are a small team, 11 to 50 people, which usually shapes who they work with. You will probably talk to the people who build it, which is great until you need 24/7 support.

Galio is based in San Francisco, California. More on galio.io.

Things worth asking about: portfolio quality, app store experience, and maintenance terms. Ask for a trial on your own data, not a canned demo.

Every review on Revaw shows how it was verified, so if you know Galio well, your review carries weight here.