Tcl Products Curated Catalog Your secure open source foundation Library 79M+ components Integrations Supported Languages Containers Solutions Solutions For Security Teams Open Source Security for CISOs & Teams For Engineering Leaders Open Source Management for Engineering Leaders For Developers Secure Open Source for Developers use cases Vulnerability Management Open Source Vulnerability Management Supply Chain Security Software Supply Chain Security Compliance & SBOM Open Source Compliance and SBOM Generation Resources The 2026 State of Vulnerability Management & Remediation Read the article Blog Academy Docs Trust Center View all Resources Integrations JFrog Artifactory Sonatype Nexus Kubernetes Cloudera CI/CD Pipelines IDEs Trivy Wiz Company About Securing Open Source Since 1997 Why ActiveState Trusted Open Source for the AI Coding Era Partner with Us Bring Secure Open Source to Your Customers Careers Be Part of a Diverse, Inclusive Team Press ActiveState in the News Contact Govern what AI introduces. Pricing Support OverviewService Status Login Tcl ActiveTcl: Tcl Distributions & Enterprise Support The Trusted Tcl Distribution, Backed by Enterprise Support ‍ActiveState builds and maintains ActiveTcl for Windows, Linux, and Unix. Existing customers can log in to to download current builds. New to ActiveState? Talk to our team to get access, whether you need a specific version, Beyond-EOL support for Tcl 8.6, or an enterprise deployment. Talk to Sales Get ActiveTcl Existing customers: Log into download your current ActiveTcl build. New to ActiveState? ActiveTcl access is provided through our team, not a public download. Contact us to get set up, whether that's a standard Windows/Linux/macOS build, an archival version for Solaris, or AIX, or an enterprise support agreement. The ActiveTcl 8.6 distribution includes: Core OO system Coroutines Core zlib support PNG image format ttk::spinbox Widget Tcl Database Connectivity (TDBC) Built-in canvas text rotation Running Tcl in Production? Here's the Real Risk. The language isn't the risk. Running it unsupported is. Outdated builds, unpatched vulnerabilities, and no clear path forward when something breaks in a system nobody currently on staff originally built, that's what turns a stable legacy system into a liability. ActiveState offers commercial support, security patching, and custom builds for teams that can't afford downtime or an unanswered CVE. Talk to Our Team Why Teams Choose ActiveState for Tcl Supported Tcl distributions Built, tested, and maintained releases across the versions enterprises actually run in production, including versions no longer supported by the community. Security patching and vulnerability remediation On a contractual SLA, not best-effort. Migration and modernization support For teams moving off end-of-life versions or consolidating custom builds. Who This Is For Engineering and infrastructure teams maintaining embedded, test automation, or industrial systems built on Tcl. Security teams that need a defensible answer when an auditor asks about EOL software in production. Organizations evaluating whether to maintain, migrate, or replace legacy Tcl systems and need expert guidance either way. Contact Us FAQs Still have questions? Talk to our team. Contact Support Where can I download ActiveTcl? Existing customers can log in ActiveState to access current ActiveTcl builds. If you're new to ActiveState, contact our team to get set up with the right build for your environment. Is ActiveTcl still supported? Yes. ActiveState has supported Tcl/Tk continuously since 1997, and continues to build and maintain current releases, including Beyond-EOL support for Tcl 8.6. Is there a cost to use ActiveTcl? Community-tier runtime builds are available at no cost for existing Platform customers. Enterprise-level commercial support, custom builds, and indemnification are available on a paid basis. What platforms does ActiveState provide ActiveTcl builds for? Windows and Linux for standard builds. ActiveState also provides commercially available archival versions and binaries for Solaris, HP-UX, and AIX, along with support for each. Can I get security patches for an older or end-of-life version of Tcl/Tk, like 8.6? Yes. ActiveState offers Beyond End-of-Life (EOL) maintenance for Tcl 8.6, including security patching and vulnerability remediation on a contractual SLA. What's the difference between ActiveTcl and the Curated Catalog? ActiveTcl is ActiveState's built, tested Tcl distribution. The Curated Catalog extends the same model, vetted and continuously remediated builds, across every open source language your organization runs, not just Tcl. Does ActiveState help teams migrate off Tcl, not just support it? Yes. Our team supports both paths: keeping an existing Tcl deployment secure and current, or planning a migration if you're moving workloads to another language. Who do I talk to about a Tcl support contract or enterprise licensing? Use the Contact Us form on this page. A member of our team will follow up directly. Running More Than Tcl? If Tcl is one piece of a larger open source footprint, the Curated Catalog extends the same model, vetted, continuously remediated builds, delivered through the artifact repositories and package managers your teams already use, across nine modern ecosystems: Python, JavaScript, Java, .NET, C, C++, R, Go, and Rust. Same standard your Tcl deployment gets. Same governance, applied everywhere your developers are pulling packages from. See the Curated Catalog Vetted, secure open source components built from source, remediated continuously, and delivered through your existing tools. 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