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Use Case • Legacy Modernization

Modernize, without the rebuild.

One platform. Old and new software, protected alike.

Production Platform 88 svc · 12 ns Search 757 objects across 8 types ▲ 10 degraded● 743 healthy
spire-grafana
10 services · 2 edges · 5 discovered
8 degraded objects101 healthy objects1 security
PODS1 of 10 pods not healthy
greymatter.io/managed-by · 8
REQUESTS
35
ERRORS
○ 0.0%
spire-one2many
17 services · 1 edge · 13 discovered
188 healthy objects1 security
PODS1 of 12 pods not healthy12 pods · all healthy
greymatter.io/managed-by · 15
REQUESTS
1K
ERRORS
○ 0.0%
spire-nifi
8 services · 2 edges · 2 declared
69 healthy objects
PODS8 pods · all healthy
greymatter.io/managed-by · 6
REQUESTS
15
ERRORS
○ 0.0%
spire-opencost
5 services · 1 edge · 1 discovered
38 healthy objects
PODS5 pods · all healthy
greymatter.io/managed-by · 3
REQUESTS
2
ERRORS
○ 0.0%
Product view · sample data. Names and identifiers are obscured.
Product view · sample data. Names and identifiers are obscured.
Verified, not claimed
No application rewrites
Existing systems stay exactly as they are.
See how it works →
FIPS 140-3 validated
(CMVP #5191)
Validated by NIST.
See Security Standards →
GigaOm Radar Leader and Outperformer, 4+ years
Named a Leader and Outperformer in service mesh.
Read the Report →
Protected on day one

Lock down the systems your business cannot afford to lose.

Rebuilding old software to meet today's security mandates can take years. Greymatter.io protects your systems now, without rewrites or rebuilds.

Interactive · Try it
No code changes

Skip the rewrites, outages, and retesting. Your software runs exactly as it does today.

Protection in stages

Unverified traffic hits a wall instead of an open door.

One product, one set of rules

Secure older apps and new cloud apps side by side, with one set of rules.

● EXPOSED● LOCKED DOWN
UNVERIFIED Traffic slips inside your network
Payroll
SAFEBREACHEDNO CHECKPOINT
Employee records
SAFEBREACHEDNO CHECKPOINT
Benefits portal
SAFEBREACHEDNO CHECKPOINT
Customer billing
SAFEBREACHEDNO CHECKPOINT
Greymatter.io switches on. Checkpoints lock in.
Less worry, more progress

Zero rewrites. Fewer break-ins. Faster progress.

Legacy modernization that starts paying off on day one.

Swipe · tap to view
01 · Connect legacy systems to modern apps
Yesterday's tech, today's apps.

Greymatter.io gives your aging infrastructure one guarded doorway to modern apps, APIs, and AI workloads. Each connection is checked and encrypted before anything passes through.

Legacyno rewriteone doorModern appAPIAI workload
1 / 6 · Swipe for next use case
The payoff of protecting instead of rebuilding
Read the whitepaper →
62%
Faster audits for one customer
70%
Up to 70% lower total cost
90%
Automated playbooks cut manual setup by 90%
How it works

See it. Secure it. Modernize it.

One platform takes you from blind spots to a clear view and one set of rules.

1
See it

Greymatter.io maps your systems quietly in the background. Nothing gets switched off, and no one's work stops.

See how Mesh maps connections →
2
Secure it

Protection goes on a few systems at a time, without interrupting your users. Any change is easy to undo.

Explore Zero Trust Networking →
3
Modernize it

Move systems one at a time, whenever you are ready. Their protection follows them wherever they go.

See how the App, API & AI Gateway moves traffic →
Your systems
step 1 of 3
SEE
SECURE
MODERNIZE
You see the whole map before anything changes.
OBSERVING · NOTHING BLOCKED
Connections mapped4
Blocked0
App code changed0
Benefits portal → Case recordsverified
SEEN
Payroll jobs → Case recordsverified
SEEN
Unknown device → Case recordsno identity
FLAGGED
New cloud portal → Benefits portalverified
SEEN
Works where you run

Old systems, new systems. Wherever they live.

Greymatter.io runs alongside what you have today, from the cloud to networks with no internet at all. Nothing moves, and nothing gets rebuilt.

Classified networks
Kubernetes
On-premises
AWS EC2
OpenShift
RKE2
Multiple clouds
Disconnected networks
Ready when you are

Secure the systems you cannot afford to rebuild.

Start free against your own systems. Or walk through your environment with our security experts.

Start for Free Meet Our Security Experts Browse How to Buy →
Go deeper

Additional resources

Product Mesh Learn more → Use case Zero Trust Networking Learn more → Product App, API & AI Gateway Learn more →
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Straight answers

Legacy modernization FAQs

Greymatter.io adds Zero Trust security around the systems you already run, without changing their code. Each connection proves who it is before it goes through. Your systems are protected now and ready to modernize on your schedule.

Your applications stay as they are. Greymatter.io runs alongside each application and handles identity, encryption, and access rules from the outside. Application code does not change, and nothing gets ripped out and replaced.

Greymatter.io starts by watching traffic, so you see which systems talk to which before any rule changes. You then turn on rules one group at a time. Policy changes roll out with no downtime and no redeploy.

Keep them. Those tools secure the edge of your network. Greymatter.io secures what happens inside, between your old systems, new systems, APIs, and AI agents.

Yes. Greymatter.io can protect apps at the front door first, then bring them in one at a time.