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Shimo vs Viscosity: catalog facts
Shimo	Viscosity
Paid Paid licence with a free trial; Shimo 6 was offered for 29 euros in September.	Paid One-time purchase of $16 after a 30-day free trial, no subscription.
macOS	Windows, macOS
Supports WireGuard, OpenVPN, IPsec, AnyConnect, Fortinet and SSH in one app Concurrent and automated connections	Native interface on both macOS and Windows Fine-grained DNS and routing control
macOS only, version 13 or newer Not a VPN service itself; you need your own servers or provider	Paid after the trial OpenVPN only, no WireGuard
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.