SingLink 2.0 Protocol

Which plans can use SingLink 2.0

SingLink 2.0 is currently available to Pro, Max and Rich members. Fast and Plus plans don’t include SingLink 2.0 nodes yet; they can use the other SingLink protocols already available on their plan.

Plan permissions are issued from the account backend, and the client shows the protocols your account currently has access to in real time — treat what’s shown in the client as authoritative.

• Pro: includes 2.0, plus nodes reserved exclusively for the 2.0 protocol
• Max: includes 2.0
• Rich: includes 2.0

What "up to 99% stability" means in a real session

Stability isn’t a speed number — it’s whether a connection can absorb network turbulence without dropping. SingLink 2.0’s connection stability reaches up to 99%, meaning that, under comparable conditions, it drops and needs to reconnect less often than protocols optimized for speed or early feature access.

That’s a different goal from “faster.” A protocol can post a strong number in a one-off speed test and still be quick to disconnect the moment you switch networks, hit a weak signal, or run into carrier interference. SingLink 2.0 prioritizes the connection holding up over the peak number in a single test.

Stability figures are provided by SingLink VPN’s product team; real-world results vary with network conditions, device and carrier.

Situations where 2.0 fits better

SingLink 2.0 is better suited to situations where the connection needs to hold for a long time without being interrupted — an extended video call, a large upload or download running for a while, a long remote-work session, or any other sustained task you don’t want cut off partway through.

For short, occasional browsing, the difference between protocols is less noticeable. The longer the session and the harder the network, the more a stable connection is worth.

• Long video calls or online classes
• Large file uploads, downloads or syncs that run for a while
• Extended remote work or remote-desktop sessions
• Networks that are already prone to dropping and reconnecting

Choosing between 2.0, Beta, Sola and Mini

SingLink VPN runs several in-house protocols side by side, each with a different focus: Beta is aimed at users chasing speed and early access to new capabilities; Sola and Mini are the protocols available on other plan tiers, and their specific characteristics and best-fit scenarios are described in the client.

If your plan already includes 2.0 and what you need right now is a connection that holds and doesn’t drop, 2.0 is generally the more sensible default. If you care more about a single speed-test peak, or want to try a new feature early, Beta is worth trying. If your account doesn’t have 2.0 yet, the protocols already included on your plan remain available — the client supports one-tap protocol switching, so comparing them is easy.

What Pro’s reserved 2.0 nodes mean

On top of having access to SingLink 2.0, Pro members also get nodes reserved specifically for the 2.0 protocol. These nodes serve only 2.0 connections — they aren’t shared with other protocols.

For Pro members who care most about connection stability, this means 2.0 sessions can draw on that reserved capacity instead of competing for the same nodes as everyone else.

Max and Rich members can also use SingLink 2.0, but the reserved-node benefit is currently specific to Pro.

Turning on SingLink 2.0 in the app

On a plan that includes 2.0, the protocol shows up in the client’s protocol/node selection screen once you’re signed in. One-tap protocol switching is a standard part of the SingLink VPN client, and switching doesn’t require signing out and back in.

If 2.0 doesn’t appear in your client, that usually means your current plan doesn’t include it yet — check your plan tier on the account page, or upgrade to Pro, Max or Rich.

What this page covers versus the technical whitepaper

This page answers product-level questions only: who can use 2.0, what stability actually means in use, which situations call for it, and what Pro members get on top. The protocol’s internal implementation — DNS handling, smart routing, key exchange, how Session and Stream are established, frame encapsulation, and the full thirteen-stage connection pipeline covering TCP and UDP handling — is documented in full in the SingLink Protocol technical whitepaper, and this page doesn’t repeat it.

If you need the protocol architecture, handshake details, or a technical comparison against external protocols like VLESS or AnyTLS, go to the SingLink Protocol whitepaper (/tech/singlink-protocol). If you just want to know whether this protocol is usable, worth it, and right for you, this page already covers what you need.

Frequently asked questions