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SPECIFICTION
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Basilisk vs Opera

Basilisk

basilisk-browser.org

Opera

opera.com

Side by side

FigureBasiliskOpera
Price fromFree$4/mo
Free planYesYes
Free trial—Yes
Open sourceYes—
Web—Yes
WindowsYesYes
macOSYesYes
LinuxYesYes
iOS—Yes
Android—Yes
Plans published14
Spec score · Web browsers8.2 (#58)9.2 (#5)
Browser engineotherchromium
Cross-device syncYesYes
Extension supportown_storeboth
Free planYesYes
Supported platformsdesktopOpera offers downloads for Windows, macOS, Linux, Android, iOS, and Chromebook.
SupportUser support and public discussion are handled through the Basilisk section of the Pale Moon forum; confirmed reproducible bugs should be filed in the source repository.Opera directs users to its Help Center, community forums, and bug report wizard for assistance and issue reports.

Plans

Basilisk

  • BasiliskFree

Basilisk pricing →

Opera

  • Opera browserFree
  • VPN Pro — six months$5 a month
  • VPN Pro — one month$8 a month
  • VPN Pro — one year$48 a year

Opera pricing →

In their own words

Basilisk

Basilisk has no write-up on Specifiction yet; its figures are above.

Visit basilisk-browser.org

Opera

Opera is a free web browser for Android, iOS, Linux, macOS, Windows, and the web, with extension support and cross-device sync. Tab Islands group related tabs for collapsing or expanding. Built-in tools include an ad blocker that can also block cryptocurrency-mining scripts, plus a free VPN with no data cap and three general locations. Opera AI can use open-tab context, generate images, summarize PDFs, and translate or summarize YouTube videos. ChatGPT and Gemini are available from the sidebar, and Opera says its AI tools do not require sign-up. The sidebar also offers WhatsApp, Slack, Discord, Messenger, and Telegram, while Music Player supports Apple Music, Spotify, YouTube Music, and Deezer. Users can set browsing data—including history, cookies, passwords, and autofill data—to clear on exit. Opera browser costs nothing. VPN Pro is separate: plans cost $4 per month billed $48 yearly, $5 per month billed $30 every six months, or $8 per month billed monthly.

Visit opera.com