Before your next renewal

Still paying for PKZIP
or SecureZIP?
There's a better option.

Connect/ZIP is a drop-in replacement that delivers the same performance and reliability — guaranteed at least 50% less than what you're paying now.

50%+

Cost Savings

Guaranteed vs. PKZIP or SecureZIP

85–95%

Compression Rate

With zEDC/zIIP optimization

0

Workflow Changes

In most cases*

45+

Years

Mainframe expertise

PKZIP Replacement

Your PKZIP Bill Is a Modernization Budget.

Switch to Connect/ZIP and keep 50% of what you're paying today. Same archives, same JCL patterns, half the cost. Companies running serious MSU volumes find the savings pay for — or substantially offset — Connect/AI or Connect/3270 licensing. Stop renewing. Start reinvesting.

Same performance.
Lower cost.

If your team is running PKZIP or SecureZIP on z/OS, Connect/ZIP replaces it without disrupting your existing job streams or workflows. Your team won't notice the difference operationally — but your next renewal invoice will look very different. And if you're also facing a machine upgrade, our pricing is structured to make that transition less painful than what you're used to with PKZIP or SecureZIP.

Connect/ZIP is built natively for z/OS with full zEDC hardware acceleration, zIIP offload optimization, AES encryption, and quantum-safe security — capabilities that most legacy compression tools simply don't include.

Most customers switch for the savings.
They stay for everything else.

Connect/ZIP is one component of Connect/MP — a suite built to connect your z/OS environment to the modern world. When you switch from PKZIP or SecureZIP, you're not just replacing a compression tool. You're getting a platform your team can grow into.

  • Connect/USS Replaces file system staging between z/OS batch and Unix System Services with stream-based data exchange — faster, cleaner, and less error-prone.
  • Connect/Hybrid Automates secure, high-speed data and application integration between your mainframe and cloud or distributed platforms — without middleware or code changes.
  • Connect/JES Monitors your JES spool and automatically routes output that meets your defined criteria — to email, FTP, or enterprise applications. No manual spool management.
  • Connect/Web Adds HTTP and REST API access to your existing z/OS applications using REXX, Java, PHP, or Python. Modern interfaces on top of your existing code.
  • Connect/AI Connect/AI is an innovative solution for delivering native, local and cloud-based AI analysis and insights directly via z/OS batch jobs, enabling faster, smarter decisions at scale with minimal disruption, strong security, and cost efficiency. Available as an add-on.

Our expert development support team will help you figure out which components make sense for your environment.

Request a Meeting

Tell us a little about your environment and we'll be in touch to find a time that works.

We'll respond within one business day. No sales pressure.

Independent Endorsement

What Grok AI says about Connect/ZIP

“For z/OS mainframes, Connect/ZIP (fka ZIP/390) leads third-party ZIP compression solutions with its exceptional price-performance ratio, up to 95% compression, zEDC/zIIP optimization, and robust security. Combined with JCL and API compatibility, it’s the ideal replacement for PKZIP for z/OS — reducing costs without sacrificing performance or functionality.”

Grok AI — Analysis-Based Recommendation

Customer Reviews

Trusted by mainframe teams worldwide

★★★★★

“The solution delivered 100% of the advertised benefits, including savings of over 60% in related software costs. The installation was easy, requiring no changes to our production jobs, for operations or end-users. We are highly satisfied with the purchase and I have no reservations recommending the product.”

Mainframe Systems Programmer — Fortune 500 Rail Transportation Co.

★★★★★

“Very easy installation and a very good transition experience. All of our existing zip jobs ran unchanged. The technical team has been very helpful and responded quickly to our issues with superior environment and product knowledge. I would recommend this solution to a colleague.”

Mainframe Network Engineer — Fortune 100 Financial Services Firm

Data 21 Enterprising Software

Data 21, the Data 21 logo, and all other Data 21 software product and service names are trademarks of Data 21. All other trademarks belong to their respective companies. © Copyright 2026 Data 21. PKZIP®, PKWARE®, SecureZIP® are trademarks of PKWARE® and are not affiliated with Data 21.

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.

This site uses cookies. By continuing to browse our site you are agreeing to our use of cookies.