Hack

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Programming Language · Vendor site 2026-10-04

Hack is an object-oriented programming language from the HHVM ecosystem designed for building reliable websites at scale with gradual typing. The official site links documentation, GitHub sources, and community channels for developers adopting Hack on HHVM.

Updated 2026-10-04View sources

Official website

Category: Programming Language
Free access: Language and documentation are published as an open-source project without a paid license checkout on hacklang.org.
API access: Not confirmed

Is Hack right for you?

A good fit for

Web engineers on HHVM stacks who want statically typed discipline with dynamic-language ergonomics.

Before you choose

Hack targets HHVM-based deployments rather than offering a hosted language runtime SaaS from the homepage.

Typed language for HHVM

Hacklang.org introduces Hack as a gradually typed language for large web codebases with docs and open-source repositories.

What it can do

Features & capabilities

Unknown is different from unavailable. Each fact carries its own evidence.

Capability	Value	Evidence	Checked
Language goal	Homepage describes Hack as an object-oriented language for building reliable websites at epic scale.	Facts sourced	2026-10-04
Type system	Site highlights reconciling fast dynamic development with static type checking and instantaneous feedback.	Facts sourced	2026-10-04

Understand the total cost

Hack pricing & plans

Free

Language and documentation are published as an open-source project without a paid license checkout on hacklang.org.

Access: Language and documentation are published as an open-source project without a paid license checkout on hacklang.org.

Explore pricing & history

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The practical questions

Frequently asked questions

What is Hack used for?

Does Hack have a free plan?

Language and documentation are published as an open-source project without a paid license checkout on hacklang.org.. This record lists ongoing free access; check the plan limits before starting.

How much does Hack cost?

No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.

Can I use Hack through an API?

Not confirmed. API access and subscription access may have different terms; consult the linked sources.

What should I check before choosing it?

Hack targets HHVM-based deployments rather than offering a hosted language runtime SaaS from the homepage.

Price history

No retained pricing changes yet. A current price alone does not establish a historical trend.

How this profile is supported

Identity and profile

Reviewed vendor source

Read original source ↗

2026-10-04

Facts apply to the named version and check date. Send a sourced correction if something changed.