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Enterprise-grade 3270 session management for z/OS

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Enterprise-grade 3270 session management and web gateway for z/OS mainframe environments.

Prefer to speak to someone now? Call us at (310) 870-7221

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Full product access with expert support throughout your trial.

Over 45 Years of Mainframe Solutions

Data 21

About Data 21

Founded in 1980, Data 21 Inc. is a veteran-owned enterprise software company headquartered in California. For over 45 years, we have delivered innovative, reliable, high-performance mainframe-centric solutions that power today’s connected enterprise.

Our software is embedded in the critical daily operations of hundreds of enterprises worldwide — a testament to our commitment to exceptional engineering and long-term client success. We don’t just support our customers; we evolve alongside them.

At Data 21, the mainframe isn’t a legacy constraint — it’s a strategic foundation.

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