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Elastio vs. Halcyon

Halcyon stops ransomware on the endpoint and captures encryption keys. Elastio detects corruption in your data regardless of how it got there. They cover different surfaces — and work best together.

Two questions. Two products.

Halcyon and Elastio each answer a fundamentally different question about what happened during an attack.

Halcyon

"Can we stop ransomware before it encrypts our files?"

·Prevents ransomware from executing on endpoints using AI trained on ransomware behavior

·Captures encryption keys in memory during an active attack

·Decrypts files after encryption without paying the ransom

·Monitors for data exfiltration before encryption begins

·Hardens endpoint agents against being disabled by attackers

Outcome: Ransomware stopped or reversed on the endpoint

Elastio

"Has the attacker compromised my data?"

·Early attack signals on the data layer, stops encryption before it starts

·Zero-day and intermittent encryption detected inside files

·Insider-executed encryption detected without mass file operation patterns

·Encryption via stolen credentials or unmanaged hosts detected in the data

·Last Known Clean recovery point, continuously maintained

Outcome: Verified Data. Provable Recovery.

Better TogetherHalcyon covers the endpoint. Elastio covers the data. Together they give a CISO confirmed answers on both.

When the endpoint is compromised

Halcyon stops ransomware on the endpoint. Elastio ensures the data is not impacted even when the endpoint is not.

Halcyon's key capture works when ransomware runs on a protected endpoint. When the encryption happens somewhere else — a server without an agent, stolen cloud credentials, an unmanaged host — there is no key to capture and no rollback to run.

Example: Codefinger (January 2025)

Attackers used compromised AWS credentials to encrypt S3 bucket data using AWS's own SSE-C encryption with an attacker-held key. No ransomware binary executed. No endpoint was involved. Data was encrypted and marked for deletion in seven days. There was no key for any endpoint agent to capture.

Reported by Halcyon RISE Team, January 13 2025. Confirmed by AWS Security Blog, January 2025.

How Elastio covers this

Elastio inspects the data directly, not the process that encrypted it. Whether encryption happened on the endpoint, in the cloud, via stolen credentials, or by an insider, Elastio detects the corruption inside the files. The source of the attack is irrelevant.

✓Encrypted S3 objects detected regardless of how encryption was initiated

✓Backup data corruption identified before it reaches a recovery point

✓Last Known Clean confirmed across all data surfaces

Capability comparison

Side-by-side view of what each product covers — across endpoint protection, data-layer detection, and data surface coverage.

CapabilityHalcyonElastio

Ransomware prevention on endpoints

✓

—

Encryption key capture during active attack

✓

—

File decryption without paying ransom

✓

—

Endpoint agent hardening and EDR protection

✓

—

Data exfiltration monitoring

✓

—

Zero-day ransomware detection

✓

Early attack detection before encryption starts

—

✓

Intermittent encryption detection

—

✓

Insider-executed encryption detection

—

✓

Encryption via stolen credentials detected

—

✓

Custom hunts: YARA, SQL, regex

—

✓

Live data

—

✓

Replicated data

—

✓

Backup data

—

✓

Cloud storage (S3, Blob, object stores)

—

✓

Last Known Clean recovery point

—

✓

Resilience RPO (R-RPO)

—

✓

Provable recovery compliance reporting

—

✓

✓ Yes~ Partial— No

After a breach, three questions get asked

1.Were any files encrypted on our endpoints?

2.Did encrypted data reach our backups and cloud storage?

3.Which recovery point is clean and how long will recovery take?

Halcyon answers the first. Elastio answers the second and third. Together they give a CISO the complete picture: what happened on the endpoints, whether the damage reached the data, and which recovery point is confirmed clean. Boards, regulators, and insurers ask all three.

PROVE YOUR RECOVERY