Left Hook puts the tech in tech partnerships. We help SaaS leaders build API-driven integration apps and connectors for Zapier, Hubspot, Quickbooks, Microsoft, Zoom, and 40+ marketplaces.

Left Hook was named Zapier's first-ever Trusted App Developer in 2016. We've built more than 50 different Zapier Public Apps for FreshBooks, Recharge, Connectwise, Hootsuite, Clio, Persionio, Chargify and many more. We've learned more than 250 different SaaS APIs across 9+ years of integration development.

For direct/native marketplace apps, we use our own open source integration framework (FriggFramework.org). Publicly released in the fall of 2022, Frigg already powers integrations for Crossbeam, Clyde, FastSpring, and rising startups.