When does software count as legacy?

Software is considered legacy not by age but by maintainability. When updates are risky, knowledge depends on one person, or the framework no longer receives security updates, a system is legacy—even if only five years old.

What is the difference between refactor, strangler and rebuild?

Refactor modernizes in place with updates, tests, and documentation without swapping architecture. Strangler puts a facade in front and replaces it area by area while it keeps running. Rebuild builds the system anew and migrates data—sensible when technology is discontinued and nobody can safely operate it.

What happens to my answers in the Legacy Check?

The check runs entirely in your browser. Answers are neither stored nor sent to the company; only anonymous counts of completions and ratings are tracked.

How accurate is the risk score?

The score is an assessment, not an expert report. Every answer adds 0 to 3 risk points, normalized to 0–100, with two safeguards against good details masking critical risks. Real fit requires examining code and operations.

When does software count as "legacy"?

Not by age but by maintainability: when updates are risky, the knowledge depends on one person or the framework no longer gets security updates, a system is legacy – even if it is only five years old.

Agencies, Studios & Services · Germany

Legacy Check

Free risk assessment tool for legacy systems with modernization recommendations

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Free online tool that assesses legacy system risk through six questions and recommends modernization strategies: refactoring, strangler pattern, or rebuild.

About Legacy Check

Screenshot of the Legacy Check homepage — Legacy Check: the homepage

Legacy Check is a free, browser-based assessment tool that evaluates the risk level of legacy software systems. Users answer six questions about technology, version, maintenance, hosting, and documentation to receive a risk score from 0 to 100 and a personalized modernization recommendation.

The tool offers three modernization paths: refactor (modernize in place), strangler (replace step by step), or rebuild (start from scratch). No sign-up is required, answers are not stored, and the assessment completes in approximately two minutes. The risk scoring equally weights all factors, with special attention to discontinued frameworks and unmaintained systems.

What we found

Six-question risk assessment covering technology, version, maintenance, hosting and documentation
Risk score normalized from 0 to 100
Identifies biggest risk drivers
Provides first steps for modernization

Pricing

Pricing model: Free

Legacy Check listing details

Category: Agencies, Studios & Services
Location: Mönchengladbach, Germany
Website: next-levels.de
Founded: 2013
Stage: Established
Founders: Slawa Ditzel, Paul Kalisch

Legacy Check metrics

What we found for next-levels.de: Ahrefs Domain Rating and Majestic link details, with changes since the last search.

Domain Rating: 38; no change since last check
Trust Flow: 25; no change since last check
Citation Flow: 32; no change since last check
Referring domains: 105; no change since last check
External backlinks: 1,611; no change since last check

Ahrefs Domain Rating found 5 Nov 2026, different since 25 Oct 2026. Topic found most: Business/Arts and Entertainment (25). Majestic found 25 Oct 2026, different since 25 Oct 2026. Link details found by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

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Legacy Check domain, found

See what we found

There is nothing to show, because .de domains have no public RDAP data from their registry.

Find more on next-levels.de

Legacy Check since launch, found

Legacy Check went live on Business Listing Finder on 25 October 2026. Here is what our readings show since then.
Measure	At launch, then latest
Domain Rating (Ahrefs)	38 to 38 no change since launch 25 Oct 2026, then 5 Nov 2026
Trust Flow (Majestic)	25 first measured 25 Oct 2026
Referring domains (Majestic)	105 first measured 25 Oct 2026

Day 10 since launch. Next receipt: day 30, 24 Nov 2026. Readings only: they do not prove what caused a change, and many things can. A metric we have no reading for is left out.

Biggest gains on Business Listing Finder

Where to find it

Mönchengladbach, Germany

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Online at next-levels.de

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Common questions

When does software count as legacy?: Software is considered legacy not by age but by maintainability. When updates are risky, knowledge depends on one person, or the framework no longer receives security updates, a system is legacy—even if only five years old.
What is the difference between refactor, strangler and rebuild?: Refactor modernizes in place with updates, tests, and documentation without swapping architecture. Strangler puts a facade in front and replaces it area by area while it keeps running. Rebuild builds the system anew and migrates data—sensible when technology is discontinued and nobody can safely operate it.
What happens to my answers in the Legacy Check?: The check runs entirely in your browser. Answers are neither stored nor sent to the company; only anonymous counts of completions and ratings are tracked.
How accurate is the risk score?: The score is an assessment, not an expert report. Every answer adds 0 to 3 risk points, normalized to 0–100, with two safeguards against good details masking critical risks. Real fit requires examining code and operations.
When does software count as "legacy"?: Not by age but by maintainability: when updates are risky, the knowledge depends on one person or the framework no longer gets security updates, a system is legacy – even if it is only five years old.

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