Viscosity
Viscosity: A paid desktop client for configuring and monitoring OpenVPN connections. Ranked #26 of 27 in Vpn Client by our editors (6.4/10); pricing: 30-day trial; best for desktop users configuring OpenVPN connections.
At a glance
- Editor score6.4 / 10
- Pricing30-day trial
- Best forDesktop users configuring OpenVPN connections
- Free planNo
- Facts checked24 Sep 2026
Where it wins
- Detailed routing, DNS, and conditional connection controls
- Supports multiple simultaneous VPN connections and varied authentication options
- Packages connection profiles and settings for managed distribution
Where it doesn't
- Supports OpenVPN only, rather than a range of VPN protocols
- Limited to macOS and Windows desktop use
- No time-unlimited free plan; the trial lasts 30 days
Our verdict on Viscosity
Viscosity is a desktop client for importing, configuring, and monitoring OpenVPN connections on macOS and Windows. It is suited to individuals and teams connecting to workplace, home, or VPN-provider networks that already support OpenVPN. Its connection editor and profile-packaging options also make it relevant to administrators distributing connection settings. This is a focused client, not a VPN service: it connects to compatible servers, and the product description does not specify a network of server locations.
Configuration depth is a central strength. Users can monitor connection details, traffic, and network statistics, choose full or split DNS, and set advanced routing rules and conditional connections. Viscosity also supports simultaneous connections to multiple VPNs, traffic obfuscation including Obfsproxy integration, and scripts triggered by VPN connection events. Authentication options include PKI, smartcards, U2F, and one-time passwords. These controls suit people who need to manage how desktop traffic is routed or how connections authenticate; they may be more than a basic connection workflow requires.
According to the published plan, Viscosity is a one-time purchase starting at USD $16, with no subscription or recurring fees. A 30-day trial is available, but it is not a permanent free plan. The listed purchase includes email support and free updates for future 1.x versions. macOS and Windows support provide a desktop option across those systems, while the OpenVPN-only scope rules it out for buyers seeking a client for other VPN protocols or platforms. Choose Viscosity when detailed OpenVPN configuration, monitoring, or profile distribution matters; look elsewhere if broad protocol coverage or a free ongoing option is a requirement.
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Viscosity pricing
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Viscosity fact sheet
| Free plan | No |
|---|---|
| Paid from | Not verified |
| Simultaneous connections | Not verified |
| Kill switch | Not verified |
| Split tunneling | Not verified |
| Supported platforms | macOS, Windows |
| VPN protocols | OpenVPN |
| Server locations | Not verified |
| Free trial | 30 days |
| Deployment | Desktop |
| Platforms | macOS, Windows |
| Compliance & security | 2FA |
| Support | Email, Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | 30-day trial (source) |
| Website | sparklabs.com |
| Facts checked | 24 Sep 2026 |
Alternatives to Viscosity
- AWS Client VPNStrong AWS-native remote-access VPN; usage-based charges require cost monitoring.9.1
- Check Point Endpoint Security VPNA managed IPsec client for corporate access, with Windows-focused endpoint controls.8.9
- NetBirdAn open-source WireGuard network with identity controls, cloud hosting, and self-hosting.8.8
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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