DATENSEN

Licensing model

Buy Once. Use Forever. Updates Are Optional.
  • No subscriptions or automatic renewals
  • Get new features when you want
  • One license works on Windows, macOS, Linux

Perpetual - Lifetime License

  • Your license never expires. Once you buy it, it's yours forever—no subscription fees, no surprise renewals. You own it outright.
  • Use it on any operating system. Your single license works on Windows, macOS, and Linux. No need to buy separate licenses for different systems.
  • Your license is tied to you, not your computer. Use your license on your laptop, desktop, work computer, home machine — everywhere you work. One license, unlimited installations.

Updates and upgrades

  • Year 1: Free updates included. When you buy your license, we include 12 months of free updates and new features. No hidden fees.
  • Year 2+: Updates are optional. After your first year, you can: Get updates for new features and security patches or keep your current version and keep using it forever (no updates, but software works perfectly).
  • No automatic renewals. We never charge you without your permission. You decide when to renew—or if you want to renew at all.

You Buy a License

What happens if I purchase a license?

What this means: Your license never expires. The first year is fully supported with updates. After that, you control whether you want new features.

You Let Your Updates Expire

What happens if I end my subscription?

What this means: Your software never stops working. If you skip renewal, you keep the last version you received. Renew anytime if you want new features again.

You Renew After a Gap

What happens if I renew my subscription later?

What this means: Took a 2-year break? When you renew, you get access to ALL updates released in that time. You're never left behind.

Why a perpetual license is the right choice for serious organizations

Most software pricing pages list features and costs. This section makes a different argument — one aimed at IT managers, procurement teams, and anyone responsible for evaluating tooling decisions that will outlast a single project or budget cycle.

No annual budget line to defend

SaaS subscriptions require annual renewal. That means every year, someone has to justify the spend again — against shifting priorities, tighter budgets, and the general friction of procurement cycles. A perpetual license eliminates that process. You approve the purchase once. The software is owned, not rented, and it continues working regardless of what happens in the next budget review.

Optional annual updates are available for teams that want new features, but they are genuinely optional — not a forced renewal to keep the software functional. An organization can skip update renewals for years, return when needed, and pick up all accumulated updates at that point.

No vendor lock-in or pricing risk

SaaS pricing can change. Vendors raise prices, restructure tiers, or discontinue plans. With a perpetual license, the version you own cannot be taken away, repriced, or feature-gated after purchase. The terms you agreed to at purchase remain in force for that version indefinitely.

This matters in organizations where tool stability is a dependency — where a data modeling workflow, a set of project templates, or a team's accumulated diagrams represent real institutional investment. A vendor changing their pricing model mid-contract is a disruption that perpetual licensing makes structurally impossible.

Your schema data never touches vendor infrastructure

SaaS data modeling tools route your database schemas through the vendor's cloud infrastructure. That is simply how they work — the browser renders what the server processes. For organizations with security policies, compliance requirements, or internal data governance rules, this can be a hard blocker. Schema structures frequently contain sensitive information: table names, field definitions, business logic encoded in relationships, and sometimes PII field labels.

Our tools run entirely on your machine. There is no server-side processing of your schemas, no vendor infrastructure in the data path, and no cloud account that holds a copy of your projects. The offline architecture is documented in detail here.

The cost math over time

A typical SaaS data modeling tool costs between $50 and $200 per user per year, with some enterprise tools significantly higher. A perpetual license with one year of updates costs a fraction of that — and the license does not expire. Even with optional annual update renewals, the five-year total cost of ownership is substantially lower than a comparable SaaS subscription.

For teams buying multiple seats, the difference compounds. Each seat is a one-time cost, not an annual line item per person.

Try Luna Modeler free for 14 days

Frequently Asked Questions
What happens if I never renew?
Your license works forever. You'll have access to the version you own, with all its features intact. The software doesn't expire or lock you out. You simply won't receive new features released after your update period ends.
Can I use my license on multiple computers?
Yes. You can install and use your license on as many of your own devices as you want (Windows, macOS, Linux). Your one license covers all your personal machines. Limitation: Only you can use it. If your colleagues need it, they each need their own license.
What's included in updates?
Updates include: Bug fixes - We fix issues we discover, Security patches - Critical security improvements, New features - New functionality we've added. When you renew, you get everything released in that 12-month period.
Can I update from a much older version?
Yes. When you renew after a gap, you get access to the latest version. You can jump from version 12 to version 15, for example.
Is this a subscription?
No. You own your license outright. It never expires. Updates are optional—you can choose to get them or skip them entirely. A true subscription forces ongoing payments; we give you the choice.
No automatic renewals?
Correct. We never charge you without your permission. You decide when to renew—or if you want to renew at all.
Why perpetual licenses?

Perpetual licenses eliminate annual budget renewals, remove vendor pricing risk, and keep your schema data off vendor infrastructure. Over a 5-year period, the total cost of ownership is significantly lower than a comparable SaaS subscription — especially for teams with multiple seats. Read the full case above.