How Attestor compares
There are a lot of "CMMC tools." Most solve a different problem than Attestor. Here's the honest breakdown.
First, two different jobs
Before comparing tools, it helps to separate two categories that get lumped together in "CMMC compliance" pitches.
GRC / compliance-automation tools
Vanta · Drata · Totem · FutureFeed
Track your policies, controls, and readiness across frameworks. They tell you what you must do and help you document it. They do not collect your security logs, monitor your systems, or produce log-based evidence.
SIEM / audit logging
Attestor · Splunk · Blumira · Huntress
Actually collect and monitor security events, and produce the log-based evidence an assessor wants for the Audit & Accountability controls.
Feature comparison
Where each category fits — and where it doesn't — for a CMMC Level 2 program.
| Capability | Attestor | Enterprise SIEM Splunk, LogRhythm | Cloud SIEM Blumira, Huntress | GRC / Compliance Vanta, Drata, Totem |
|---|---|---|---|---|
| Self-hosted — CUI stays in your enclave | self-hosted, but heavy | cloud-hosted | cloud-hosted | |
| Purpose-built for CMMC / 800-171 evidence | general SIEM | readiness, not log evidence | ||
| Collects & monitors security logs | ||||
| Auto-maps events to 800-171 / CMMC controls | manual | |||
| Signed, assessor-ready evidence bundles | control evidence, not log evidence | |||
| Fit for a small team / low complexity | ||||
| Typical cost | $ · transparent tiers | $$ · often six figures | $ · per-seat, cloud | $ · $3k–$50k / yr |
Comparison reflects typical positioning; verify specifics with each vendor. Competitor names are trademarks of their respective owners.
Attestor + your GRC tool = full picture
Your GRC tool manages the control framework, policy documents, and readiness tracking across all 110 practices. Attestor provides the live audit logging, continuous monitoring, and cryptographically signed evidence for the AU and monitoring controls a C3PAO will actually inspect.
Together they cover both the paperwork and the proof — without expanding your CUI boundary into a shared cloud SIEM.
Attestor itself never sends your data to Phaethon — no telemetry, no analytics, no licence check-in. The only outbound connections it makes are the alert webhooks and SMTP destinations you configure.
When Attestor is the right fit
We'd rather tell you up front than have you find out three months in.
Good fit
- You handle CUI and can't (or won't) send logs to a third-party cloud.
- You're a small-to-midsize DIB contractor preparing for a Level 2 assessment.
- You want assessor-ready evidence without standing up Splunk.
- You're an MSP building a CMMC offering and need to keep each client's data in their enclave.
Probably not the right fit
- You want a fully managed, done-for-you service — Attestor is self-managed software.
- You need a single tool to manage all 110 controls end-to-end — pair Attestor with a GRC tool.
- You have no ability to run Docker in your environment.