Perimeter 81 (now Check Point SASE)

Overview

Perimeter 81 was an Israeli cloud-delivered remote access and network security service. Check Point announced the deal on 2023-08-10 for about 490 million dollars and closed it on 2023-09-13. The product became Harmony SASE, and in March 2026 it was renamed again: Check Point's product page now reads "Check Point SASE Platform (Formerly Harmony SASE)," and the 2026 release notes record the rebrand reaching UI, email templates, and API references in April 2026. perimeter81.com redirects to sase.checkpoint.com, which still carries the Perimeter 81 name in its page title and login hosts.

What it is good at

Fast setup for smaller teams. The Check Point SASE site groups the service into Private Access (ZTNA, agentless ZTNA, an enterprise browser, a private backbone, and firewall as a service), Internet Access (hybrid secure web gateway, SaaS security, browser and Wi-Fi security), and SD-WAN, delivered from 85 or more points of presence (a vendor figure). The model is a managed cloud network: connect cloud and office resources, push the agent, and write identity-based access rules, with no appliances to rack. That suits SMB and mid-market IT teams without network engineers.

Identity and posture controls are maturing. The 2026 release notes add certificate issuer and root CA checks to device posture (January), MD5 file-hash and multi-version OS rules (generally available in September), SCIM from Microsoft Entra ID keyed on the immutable identifier, and early-availability transparent SSO for the agent on Entra-joined devices. Browser-based RDP with Network Level Authentication went generally available in April 2026. See device posture and SCIM.

Where it falls short

Two renames since 2023 mean documentation, marketplace listings, and third-party reviews are inconsistent, and older Perimeter 81 pricing and feature pages still circulate. The roadmap is now Check Point's, which helps buyers who run Check Point firewalls and endpoint and matters less to others. It is SaaS only; deep on-premises control or an air-gapped deployment is not an option. Several identity features above were early availability when we checked, so confirm general availability for anything you depend on.

Pricing

Quote-based. As of 2026-11-05 the pricing page offers a TCO calculator, a demo, and a "Start Now" sign-up, but no published per-user prices. Perimeter 81's former public tiers no longer appear there.

Best for, and who should look elsewhere

Choose Check Point SASE if you are an SMB or mid-market team that wants ZTNA and web security from one console quickly, and especially if you already run Check Point. For an independent ZTNA, compare Twingate, Tailscale, or Cloudflare. For enterprise SASE with SD-WAN at scale, look at Cato Networks or Zscaler. The best zero trust tools ranking and the consolidation report give context.

Bottom line

Perimeter 81 is now Check Point SASE: still approachable cloud ZTNA for smaller teams, but quote-priced and best bought by Check Point customers.