VALENSYSTEMS INC.

Valen Systems / Free software & tools

Free software. Yours to run.

Tools for Cloudflare, local AI and everyday work. Download a release or start from the source. No signup or sales call required.

Browse free productsView every repository

Free, open-source products

Choose a tool for the problem in front of you. Each one has its own source, license and setup instructions.

Cloudflare development tools

Twenty-four free tools for requests, configuration, releases, email, observability and Cloudflare operations. Download a ZIP and start with the README. No sign-up or payment gate.

Requests & access

All categories
Rate Limit ContractFree betaCheck synthetic rate-limit responses, route policies and environment parity locally.Release details
Release
v0.1.0
Runs on
Node.js22.13+ CLI; Web Crypto core; Windows untested
License
MIT

Synthetic fixture checks and fingerprints only; no live enforcement, account access, provisioning or MCP server.

SHA-256 checksum
Download ZIPSource and docs
Worker Request KitFree betaFive request helpers: bounded JSON, CORS, idempotency keys, honeypots and keyed identity hashing.Release details
Release
v0.1.0
Runs on
Cloudflare Workers Web APIs; Node.js 22.13+ for tests
License
MIT

No persistent deduplication, rate limiter or hosted service.

SHA-256 checksum
Download ZIPSource and docs
Worker No-EgressFree betaA small HTTPS origin and method allowlist adapter plus offline fixture runner for Cloudflare Workers.Release details
Release
v0.1.0
Runs on
Node.js 22.13+ CLI; Workers Web APIs for adapter integration; Windows untested
License
MIT

Offline fetch guard and fixture tester only; no live DNS, network sandbox, firewall, secrets policy, or hosted service.

SHA-256 checksum
Download ZIPSource and docs
OAuth Log RedactorFree betaFilter local OAuth/MCP JSON logs to five typed fields and check redaction fixtures without echoing payloads.Release details
Release
v0.1.0
Runs on
Node.js 22.13+; Windows untested
License
MIT

Allowlist-based local CLI, not a universal secret detector. Activity and numeric fields may remain sensitive.

SHA-256 checksum
Download ZIPSource and docs

Configuration & routing

All categories
Wrangler Config DoctorFree betaCatch eight common Wrangler configuration problems offline, from a CLI or local MCP client.Release details
Release
v0.1.0
Runs on
Node.js 22.13+; Windows untested
License
MIT; bundled dependencies retain their licenses

Advisory checks, not full Wrangler validation. No account token or deployment.

SHA-256 checksum
Download ZIPSource and docs
Wrangler GraphFree betaJoin Wrangler configuration with redacted live Cloudflare dependencies.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Route ShadowFree betaFind Worker route, custom-domain and local-intent precedence conflicts.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Wrangler Safe RunFree betaAuthorized no-shell execution for a fixed set of read-only Wrangler operations.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs

Releases & data

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Cloudflare Release ProofFree betaCreate release manifests and verify that local folders or public HTTPS files contain the expected bytes.Release details
Release
v0.1.0
Runs on
Node.js 22.13+; Windows execution untested
License
MIT; bundled dependencies retain their licenses

Point-in-time byte checks, not deployment ownership or hardened hosted SSRF protection.

SHA-256 checksum
Download ZIPSource and docs
R2 Release LedgerFree betaImmutable R2 uploads, release promotion and rollback receipts.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Workers Release GuardFree betaRead-only Worker deployment, version and rollback eligibility plans.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
D1 FlightcheckFree betaMigration-order, hash, history and recovery-readiness checks for D1.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
D1 Outbox KitFree betaIdempotent D1 outbox leasing, recovery, retry, dead-letter and replay.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs

Email

All categories
Email Fixture LabFree betaInspect local .eml files as redacted JSON, including attachments, nested messages and reported delivery-status fields.Release details
Release
v0.1.0
Runs on
Node.js 22.13+; Windows execution untested
License
MIT; bundled dependencies retain their licenses

Offline inspection, not a malware scanner or proof of email delivery. Receipts may still be sensitive.

SHA-256 checksum
Download ZIPSource and docs
Email Service AcceptanceFree betaRedacted Email Routing, DNS and destination acceptance checks.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Email Worker Inbox KitFree betaBounded MIME storage, dedupe, forwarding state and retention on D1 and R2.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs

Network & domains

All categories
Tunnel Path DoctorFree betaLayered Cloudflare Tunnel and VPC path diagnosis without exposing private origins.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
DNS TLS CutoverFree betaDNS, certificate and HTTPS preflight with explicit cutover and rollback gates.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Custom Domain ReadinessFree betaDNS, certificate, ownership, route precedence and HTTPS readiness checks.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs

Observability & checks

All categories
CF OTel PolicyFree betaGenerate a Workers logging policy, inspect sampling-volume estimates and preview fixed-field event fixtures.Release details
Release
v0.1.0
Runs on
Node.js 22.13+ CLI; Workers Web APIs adapter; Windows untested
License
MIT

Local generator and logger, not an OpenTelemetry exporter or billing cap. Config is never applied.

SHA-256 checksum
Download ZIPSource and docs
Cloudflare ProofFree betaRedacted Cloudflare account topology, coverage and drift receipts.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Binding CanaryFree betaBehavior receipts for owner-provisioned D1, R2, RPC, VPC, rate and email bindings.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
Cloudflare Control DiffFree betaSave redacted baselines and compare current Cloudflare control-plane drift.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs
MCP Edge DoctorFree betaOAuth metadata and Streamable HTTP lifecycle checks for edge MCP servers.Release details
Release
v0.1.0-beta.1
Runs on
Cloudflare Workers; Node.js 22+ for tests; customer-operated
License
MIT

Self-hosted beta requiring operator configuration; no Valen-hosted service or live-account acceptance.

SHA-256 checksum
Download ZIPSource and docs

Independent Valen Systems projects, not affiliated with Cloudflare. Original code is MIT licensed; bundled dependencies retain their licenses. Machine-readable catalog Read the release note

Local AI, mail and everyday work

Valen Network

Free open source

Build a community around discussions, shared work and an inspectable feed. The source includes account and discussion primitives, a D1 schema and a recommendation layer with explicit weights.

Access
Source and setup instructions
Runs on
Cloudflare Workers and D1
License
MIT

Developer foundation, not a packaged community service. Configure deployment, email and moderation for your installation; premium access needs additional payment integration.

Get the source
Read the license

Ollama GPU Ready

Free source prerelease

Give Ollama a GPU-readiness check before it starts. Check for the requested number of CUDA devices before systemd continues startup.

Release
v0.1.0 source prerelease
Runs on
Linux · systemd · NVIDIA
License
MIT

The recovery guide covers CPU fallback and model GPU allocation. The check doesn’t repair drivers or prove that a model will use the GPU.

Get the sourceInstallation and recovery guide

Cloudflare Hotload

Public source

Check what changed before downloading a release again. Versioned manifests and file checks let unchanged files stay cached.

Works with
Cloudflare R2 · JavaScript clients
License
MIT

Your application owns installation and activation.

Get the sourceExplore the delivery pattern
Small changes deserve a smaller update.

If a release changes three files, unchanged files can stay cached. Cloudflare Hotload uses versioned manifests and file checks to retrieve the assets that changed; your application decides when to install and activate them.

The open-source project is useful for frontend bundles, plugins, configuration and model assets. Read its delivery pattern and license before bringing it into your application.

Explore Cloudflare Hotload

Better Availability

Public source

Find the hours that work across time zones. A local-first availability mapper for distributed teams.

Access
Source and setup instructions
License
MIT
Get the source

Previews and early access

Explore the interfaces below. These aren’t released desktop downloads.

Interactive demo · Sample data

Arcturus by Valen Systems

Explore a facility overview or a machine investigation using synthetic examples. The preview pages also explain the real, separately scoped work you can request.

Arcturus for data centersArcturus for machines

Private build · Early access

Rubian

A command-line environment for people and agents, with persistent identities, homes, tools and services. The desktop and server build is private; public downloads are coming later.

Explore RubianAsk about early access
Rubian mark

Need this to fit your operation?

Use the software directly. If you need help with setup, integration or the workflow around it, tell us which tool and what you’re trying to make work.

Talk to Valen Systems

Every public application identifies its version, platform and release information where available. Private client systems stay on the access path agreed for that engagement.

Product Documentation

Manuals and references for Rubian, Kestowv, Arcturus, Valux and Core.

Earlier applications and business tools

Existing downloads, source projects and service information remain here for people who already use them. Core is the separate home for business applications.

Show earlier applications, downloads and support

Core Mail

Free open source

Use your own domain for an inbox you control. Read, search and reply through a local client backed by Cloudflare Email Routing and Email Service.

Access
Source and setup instructions
Runs on
Desktop client and Cloudflare Workers
License
GPL-3.0

Self-hosted setup requires your own Cloudflare configuration. Hosting and email-provider charges are separate from the free code.

Get the source
Read the licenseDesktop downloads

Desktop apps

Choose the package for your machine. Check the release manifest for version and platform details.

Free desktop application · GPL-3.0 source

Core Mail

Keep business conversations on the account you control.

Core Mail is a local desktop app for Cloudflare Email Service and Email Routing. Version 1.1.4 is now available for macOS Apple Silicon and Linux x86_64, with platform-specific packages and release manifests on Valen Systems infrastructure.

Give your business conversations a desktop home.

Your business already owns its domain. Core Mail gives its incoming messages and sent replies a place to stay together on the machine where you work.

Find the thread, read the history, reply or reply-all, and move the finished conversation out of the inbox. Search and bulk cleanup help when the work is finding the right message rather than writing another one. The current Apple Silicon Mac and Linux downloads stay linked above.

  • Keep incoming and outgoing thread history together.
  • Use the sender address that fits the conversation.
  • Search, archive and clean up the inbox from the desktop.
Different addresses. One business behind them.

Sales, support and contact can serve different purposes without losing the conversation behind each address. Core Mail's sender options and shared domain-inbox setup let you handle that work through the Cloudflare account you control.

The app is a client for your configured Cloudflare mail infrastructure, not a new hosted mailbox account or a bulk-marketing service. Set up routing and sending for your domain, then use the desktop app to work with the messages.

Inspect the Core Mail sourceDiscuss business communications

Choose your platform

Download Core Mail for macOSv1.1.4 · Apple SiliconDownload Core Mail for Linuxv1.1.4 · AppImageDownload Core Mail for Linuxv1.1.4 · Debian package
View the Core Mail release manifestView the Core Mail Linux manifestInspect the public source

Desktop application

Core CRM

A desktop home for leads, pipeline work and follow-up.

Core CRM is the client operating surface for leads, pipeline work, follow-up, and relationship state. Version 1.1.2 is now available for macOS Apple Silicon, Windows 10/11 x64, and Linux x86_64.

Choose your platform

Download Core CRM for macOSv1.1.2 · Apple SiliconDownload Core CRM for Windowsv1.1.2 · x64Download Core CRM for Linuxv1.1.2 · AppImageDownload Core CRM for Linuxv1.1.2 · Debian package
Explore CoreView the Core CRM release manifest
Need help with business email?

Need help with business email? Explore communications services