StackRegent vs Plesk, a Plesk alternative for Windows Server

Why hosts look for a Plesk alternative for Windows#

Plesk is the panel most Windows hosting providers grew up with, and for many of them it still works. The search for a Plesk alternative for Windows usually starts with one of three events: a renewal notice, a server that crosses a domain limit, or an extension that turns out to be paid or Linux-only. Plesk has announced that license prices change for new orders and renewals from January 1, 2027, so the question is on many renewal calendars this winter.

StackRegent was built for one platform only: Windows Server 2016, 2019, 2022 and 2025 with IIS 10. That focus is the main difference. Plesk is one product for Linux and Windows, and a number of its tools exist only on the Linux side. StackRegent has no Linux side, so everything it offers runs on Windows.

The table above compares the two row by row with sources. This page explains the differences that matter when you run Windows hosting for paying customers.

Editions and domain limits versus hosting accounts#

Plesk sells three editions per server. As listed on its pricing page in November 2026:

Yearly billing takes about one month off. The editions also differ in features: according to Plesk's 2026 customer licensing guide, Web Admin has the Power User view and a limited WP Toolkit, Web Pro adds the Service Provider view and the full WP Toolkit, and reseller management comes with Web Host.

StackRegent counts something else: hosting accounts, which the panel calls subscriptions. Domains, subdomains, aliases, mailboxes and databases inside a subscription are not counted at all. A customer who parks twelve domains on one subscription uses one account of your license. Every plan, from one account to unlimited, has the same features, including the reseller panel, the WordPress Toolkit, the REST API and migration tools. Current prices are on the pricing page; they are read from the store, so they are always the ones you pay.

The practical effect is that a customer adding domains never pushes your server into a higher edition. Your cost grows only when you sell another hosting account.

What Plesk sells separately, and what is Linux-only#

Plesk's extension catalog is large, and some of its most useful items cost extra or do not run on Windows at all. Checked on Plesk's own pages in November 2026:

• Backup to Cloud Pro is needed for scheduled subscription backups to cloud or SFTP storage, and Plesk's support article lists it for Plesk for Windows too.
• WP Toolkit is free on Web Pro and Web Host; on Web Admin it has to be bought, and Smart Updates is a separate purchase.
• Imunify360 is described as cybersecurity "for Linux web servers"; its own price list starts at $12 a month per server.
• Plesk Email Security lists Linux distributions only.
• Fail2Ban IP banning is marked Linux only in the Plesk documentation; Windows servers get the panel's own login protection.
• Cgroups Manager, which caps CPU, memory and disk I/O per subscription, supports Linux distributions only.

StackRegent includes its equivalents in every license, built for Windows: scheduled backups to S3-compatible storage, SFTP or FTP/FTPS; a WordPress Toolkit; Microsoft Defender scanning of website folders and mail; a spam filter with SPF, DNS block lists, greylisting and optional SpamAssassin; IP Address Banning that also covers Remote Desktop; and per-subscription limits through Windows job objects. The included free page lists them one by one with who charges for what.

IIS isolation and resource limits#

On Plesk for Windows, a subscription can get a dedicated IIS application pool, and once that pool is switched on you can set a maximum CPU percentage and recycle the pool when it uses too much private memory. That is useful, but it covers the pool, not everything the customer runs.

In StackRegent, every subscription always runs in its own IIS application pool under its own Windows user. PHP runs through FastCGI as that user with a locked php.ini per site. All of the subscription's processes, its websites, PHP and scheduled tasks, are placed in a Windows job object with caps for CPU, memory, disk I/O and process count, taken from the service plan or from server-wide defaults. Limit-reached counters show which accounts hit their ceiling.

Account isolation is checked rather than assumed: the Account Isolation page finds broken permissions and repairs them in one click, NTFS quotas cap storage, and the panel never follows junctions or hard links when it handles customer files. Details are in resource limits and isolation.

Mail on Windows: the same MailEnable base#

Plesk for Windows bundles MailEnable Standard and also supports SmarterMail and IceWarp. StackRegent installs and manages MailEnable Standard too, so mail data maps cleanly between the two and customers keep the same protocols and ports.

Around MailEnable, StackRegent adds Roundcube webmail on webmail.<domain>, DKIM signing, hourly outgoing recipient limits per domain or subscription, a smarthost option for servers whose port 25 is blocked, and Microsoft Defender scanning of mail queues and mailboxes. Plesk Email Security, Plesk's premium spam and virus filter, is Linux-only, so on Windows the comparison is between StackRegent's built-in filter and Plesk's bundled SpamAssassin. See email hosting.

Security tools on a Windows server#

Both panels run ModSecurity on IIS. StackRegent installs ModSecurity for IIS with the OWASP Core Rule Set 4, starts it in detection-only mode, and lets you switch off rules by ID, tag or message. One limitation is worth knowing: on IIS the firewall checks addresses, query strings and headers, not the bodies of posted forms, because reading them would break ASP.NET forms.

StackRegent also manages Windows Defender Firewall from the panel, with a Panic Mode and an automatic rollback if a change makes the panel unreachable. IP Address Banning watches Remote Desktop and Windows logons, the panel, FTP, SMTP, POP3, IMAP and password-protected directories. Administrators can use TOTP two-step sign-in and restrict the addresses they log in from. Let's Encrypt certificates are issued for sites and for the panel itself; wildcard certificates are not available yet, while Plesk's free SSL It! extension offers them.

Moving from Plesk for Windows to StackRegent#

A Plesk alternative is only practical if leaving is safe. StackRegent's Migration & Transfer Manager connects to a Plesk for Windows server over HTTPS through a migration agent (stackregent.exe migration-agent) or the StackRegent Migrator extension installed in Plesk. Neither changes anything in Plesk.

The transfer moves customers, resellers, service plans, domains, website files, databases with their users, mail with messages, FTP accounts and scheduled tasks, one subscription at a time, with resumable transfers. The agent reads the passwords Plesk encrypted, so customers keep them. You can test each site through Website Preview or a hosts-file entry, migrate again just before the DNS switch to copy the newest content, and only then point DNS at the new server.

When the servers cannot reach each other, the Backup Manager restores Plesk backups in the Windows .xml.zip or Linux .tar format. A password-protected StackRegent backup can also be converted back into Plesk for Windows format, so the move is not one-way. The migration page walks through the process.

When Plesk is still the better fit#

A fair comparison says when not to switch. Keep Plesk if you want one panel across Linux and Windows servers: StackRegent runs on Windows only. Keep it if your customers rely on an extension with no StackRegent counterpart, such as Sitejet Builder or a third-party integration from the catalog. Plesk Migrator can also bring accounts in from cPanel, which StackRegent cannot do, and Plesk issues wildcard Let's Encrypt certificates today.

StackRegent tends to fit when your servers are Windows-only, when customers add domains freely and you do not want that to change your bill, when you want per-account CPU, memory and I/O caps on IIS, and when you want resellers on every plan. The quickest test is the 10-day free trial: restore one Plesk backup, open the customer panel and compare.

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