Xeno and Solara are both external Roblox executors, which means they share the same structural limitations. But they differ in UNC scores, update frequency, and—most importantly—their security reputation. Here is the honest breakdown.
Quick Comparison
| Feature | Xeno | Solara |
|---|---|---|
| Type | External executor | External executor |
| UNC Score | ~84% (reported by third parties) | 76% (official) |
| sUNC Score | ~40% (reported) | 59% (official) |
| Keyless | Yes — 100% free, no keys | Yes — no key system, but Linkvertise on download |
| Safety Reputation | Official source only; fake sites are malware | Multiple confirmed malware variants; security researchers warn against it |
UNC and sUNC: Who Wins?
On paper, Solara has the higher sUNC score. Solara's official site states 76% UNC and 59% sUNC, and explains that the ceiling is lower than a paid internal executor because it is external [citation:8]. Xeno's UNC is reported at around 84%, but its sUNC is lower at around 40% [citation:15].
In practice, this means Xeno may pass more basic function-existence checks, while Solara may handle more advanced functions that actually work as intended. A Codeberg project optimized for low-sUNC executors specifically lists Xeno as fully tested and functional, while noting Solara "may fail or produce unexpected behavior" [citation:4].
Neither score is high enough for the most demanding scripts. If you need maximum compatibility, neither Xeno nor Solara is the right choice.
The Safety Difference Is Massive
This is where the comparison stops being close. Security researchers at ESET (WeLiveSecurity) have documented that Solara is a major target for malware distribution. Fake Solara installers distributed through YouTube, Discord, and fake official sites have been confirmed to deliver remote access trojans (RATs) and information stealers [citation:14].
More concerning: Grokipedia's analysis notes that multiple independent malware analyses have identified confirmed malicious payloads—including LummaC2 Stealer and Redline—bundled in various Solara variants. This indicates that some antivirus detections are not false positives, but reflect genuine threats [citation:5].
Gridinsoft also flagged a site called "solara-executor.com" as phishing with a trust score of 6/100 [citation:11]. Solara's own official site warns: "Reuploads on random sites and YouTube descriptions are the usual way people end up with malware while thinking they installed Solara" [citation:8].
Critical: Solara's official site itself acknowledges that fake versions are the primary malware vector. If you use Solara, you must download only from its official release mirrors. For Xeno, the official source is getxeno.space.
Xeno's Safety Position
Xeno has its own security concerns. Gridinsoft flagged a fake "xeno-executor.online" site as suspicious with a trust score of 22/100 [citation:12]. Xeno's developer has publicly responded to malware accusations, stating that Xeno is not a keylogger and that lower UNC is a deliberate trade-off for stability .
The difference is that Xeno has a single clear official source (getxeno.space), while Solara's official site itself admits that "anything else claiming to be an official Solara server is not run by us" [citation:8]. This makes it harder for new users to know which Solara download is safe.
Bottom line: If you want slightly higher sUNC and are willing to navigate Solara's significant malware risk, Solara has the edge on paper. If you want a clear official source, frequent stability updates, and a lower chance of downloading an infected file, Xeno is the safer choice. Only download Xeno from getxeno.space. See Is Xeno Safe to Use? for the full risk breakdown.
Related Guides
Compare Xeno to other executors: Xeno vs Krnl, Xeno vs Delta, Xeno vs Wave. Curious about UNC scores? Read Xeno UNC Level Explained.