Let's Encrypt (ISRG)
Open SourceAbout Let's Encrypt (ISRG)
Let's Encrypt is a Certificate Authority that provides free TLS certificates. Let's Encrypt is a project of the nonprofit Internet Security Research Group. It operates as a free, automated, and open Certificate Authority run for the public's benefit. It gives people digital certificates needed to enable HTTPS for websites, for free.
Used for
- Enabling HTTPS encryption on websites
- Demonstrating control over a domain to obtain a certificate
- Automatically managing certificates using ACME clients
- Securing and renewing certificates via software running on a web server
Who it is for
- Anyone who owns a domain name can use the service.
From Let's Encrypt (ISRG)'s own website, read 2026-10-23. How we build listings.
How to evaluate Data Security & DLP
This is how the CIOPages Research Team evaluates this category. It is not an assessment of Let's Encrypt (ISRG). The category covers two kinds of product, so both frameworks are here. Most buyers need one of them.
Data Loss Prevention (DLP)
30%
Classification Accuracy & Detection
Exact data match (EDM) and indexed/document matching for structured records, ML and trainable classifiers for unstructured content, fingerprinting, OCR on images and screenshots, and the false-positive rate observed on YOUR data — not the vendor’s sample set
25%
Channel Coverage & Enforcement
Consistent policy across endpoint (USB, clipboard, print, local sync), network/web, email, sanctioned and unsanctioned cloud/SaaS, and increasingly GenAI prompts — with real enforcement (block, encrypt, quarantine, justify) on each channel, not just monitoring
15%
Insider Risk & Behavioral Context
Risk-adaptive enforcement that tightens around high-risk users, UEBA and activity timelines, integration with IRM, and the ability to back-test a new policy against historical activity before it goes live
15%
Data Discovery & DSPM Convergence
At-rest discovery across endpoints, file shares, databases, and cloud stores; data-security-posture visibility (where sensitive data lives, who can access it); and whether discovery, DLP, and DSPM share one classification model and console
10%
Tuning, Operations & Incident Workflow
Quality of the incident queue and remediation workflow, policy simulation/monitor mode, end-user coaching and self-remediation, SIEM/SOAR/XDR integration, and the realistic FTE load to run the program day to day
5%
Deployment Model & Architecture
Cloud-delivered vs. on-prem servers and appliances, endpoint agent footprint and performance impact, data residency for incident evidence, and fit with an existing SSE/SASE or M365/Workspace estate
Data Security Posture Management (DSPM)
25%
Classification Accuracy & Sensitive-Data Discovery
Precision and recall on your data — structured and unstructured — beyond regex and dictionaries; AI/ML and LLM-based context detection for proprietary IP, source code, and free-text documents; secrets and credential discovery; false-positive rate; ability to learn custom data types without heavy rule-writing
20%
Data-Store & Environment Coverage
Depth across managed cloud databases (RDS, Cosmos, Cloud SQL), object storage, data warehouses (Snowflake, BigQuery, Redshift, Databricks), SaaS apps (M365, Salesforce, Google Workspace), on-prem file shares and NAS, and shadow/unmanaged stores; agentless connect-and-scan vs. agent or proxy requirements; does data leave your tenant?
20%
Risk Context: Identity, Access & Exposure
Linking each sensitive store to who can access it (data access governance), effective permissions across human and machine identities, public/internet exposure, third-party and external sharing, and — ideally — reachable attack paths; the quality of the “exposed regulated data” shortlist versus a flat inventory
15%
AI & LLM Data Security (AI-SPM)
Discovery of sensitive data in AI training sets, RAG sources, and vector stores; governance of data flowing into and out of copilots and LLM apps; detection of shadow AI; oversharing assessments for tools like Microsoft 365 Copilot; data-use policy enforcement at the AI boundary
10%
Remediation, DDR & Workflow Integration
Guided and automated remediation (revoke access, fix permissions, quarantine, tokenize/mask), real-time data detection & response on data movement and exfiltration, ownership routing to the right team, and clean integration with SIEM/SOAR, ITSM, and existing DLP rather than a siloed dashboard
10%
Compliance, Privacy & Reporting
Out-of-the-box mapping to GDPR, CCPA/CPRA, HIPAA, PCI DSS and emerging AI regulation; data-residency and sovereignty detection; support for privacy workflows (DSAR/RoPA) where the same engine serves the privacy office; audit-ready evidence, data-risk trend reporting, and RBAC/SSO on the console
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Quick Facts
letsencrypt.orgCategoryCybersecurity
SubcategoryData Security & DLP
PricingFree
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