Surfshark has launched Dausos, a new proprietary VPN protocol aimed at a familiar problem in consumer privacy software: the trade-off between speed and security. The beta release is currently limited to macOS, but the company is presenting it as a protocol built specifically for mainstream VPN use rather than adapted from older networking standards.
That distinction matters because most widely used VPN protocols, including OpenVPN, IKEv2, and even the newer WireGuard, were not originally conceived with consumer subscription VPN services as their primary use case. Providers have spent years tuning them for mass-market apps, but Surfshark argues Dausos starts from a different premise: individual users on commercial VPN networks need fast, isolated connections that can hold up under heavy shared infrastructure.
A protocol built around dedicated tunnels
The central technical claim behind Dausos is simple enough to understand even without reading the code. Instead of placing multiple users inside a shared traffic tunnel, Surfshark says the protocol creates a separate tunnel for each user. In practical terms, that is meant to reduce interference from other customers’ traffic and cut some of the congestion that can appear when many connections are processed together on the same server path.
Surfshark says this approach can deliver speeds up to 30% faster than other protocols, including WireGuard. That is an ambitious claim, and like most performance claims in networking, it depends heavily on location, server load, device, connection quality, and the service being accessed. Early hands-on testing described in the launch context suggests the real-world picture is more mixed: Dausos appeared solid for browsing and streaming, but WireGuard still held an edge in download speed retention, while Dausos performed slightly better on uploads.
Why the encryption choice stands out
Dausos also departs from the usual formula on encryption. Surfshark says it uses AEGIS-256X2 rather than the more familiar AES-GCM. For ordinary users, the important point is not the acronym itself but what it signals: VPN companies are looking for ways to improve efficiency without weakening protection, and they are also increasingly eager to show they are thinking about future cryptographic threats, including post-quantum concerns.
That said, new cryptographic designs and new protocol implementations deserve scrutiny, not marketing enthusiasm. Security software gains trust slowly. A claim that something is newer or more advanced does not by itself make it safer, especially when the protocol is proprietary and not yet broadly tested by the wider security community over time.
Audit results help, but maturity still matters
To support the launch, Surfshark commissioned Cure53 to assess Dausos. According to the company and the audit summary, no Critical or High severity issues were found in the protocol itself, and the remediation process was handled quickly. That is a meaningful signal, because independent review is one of the few reliable ways to separate serious engineering from promotional language.
Still, an audit is a checkpoint, not a final verdict. New protocols often reveal their strengths and weaknesses only after wider deployment across different devices, networks, and edge cases. The fact that some testers initially reported poor performance on residential connections underscores that point, even if Surfshark says it has already fixed the problem.
What Dausos means for VPN users now
For subscribers, the immediate takeaway is modest rather than dramatic. Dausos looks like a credible experiment in refining how consumer VPN traffic is handled, and its early performance appears close enough to WireGuard to justify trying it, especially for users curious about upload performance or protocol isolation. Because it is available to Surfshark subscribers at no extra cost, the barrier to testing it is low, though access currently requires the beta app from Apple’s App Store rather than the standard macOS download from Surfshark’s site.
The broader question is whether Dausos remains a closed product feature or matures into something the industry can inspect more fully. Surfshark has said open-sourcing is not possible at this early stage, though it is under discussion. That decision may shape how seriously Dausos is taken beyond Surfshark’s own ecosystem. In VPN security, performance matters, but transparency still carries weight.
