Comparison

Sigma VPN vs Chatsabi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sigma VPN

Encrypt your internet connection for enhanced privacy and data security. Protect your information on public Wi-Fi and mask your IP address by connecting to servers worldwide. Enjoy a simple, one-tap connection across multiple devices.

Highlights
  • Encrypted internet connection
  • Public Wi-Fi protection
  • IP address masking
  • One-tap connect
  • Multi-device support
Features
Read full description

Sigma VPN is a VPN app that encrypts your internet connection to help protect your privacy and the security of your data. • Encrypted connection: Your internet traffic is encrypted and routed through our secure servers. • Protection on public Wi-Fi: Keeps your data safe from third parties on shared networks in cafés, hotels and airports. • Protects your IP address: Choose from servers in different countries and hide your real IP address from the websites you visit. • One-tap connect: A simple interface gets you connected in seconds. • Multi-device support: Use it on more than one device. Sigma VPN is intended for users aged 18 and over. You must use the app in accordance with the laws of the country you are in and our Terms and Conditions; use for illegal purposes is prohibited. Terms and Conditions: https://www.sigmavpn.app/terms-and-conditions Privacy Policy: https://www.sigmavpn.app/privacy-policy-1

About

Chatsabi

Features
Read full description

Chatsabi is an AI assistant built for answers you can trust. Ask questions in natural language, get clear responses grounded in real sources, and keep the conversation going with follow-ups and voice input. Whether you are researching a topic, drafting an email, summarizing a document, or exploring what is happening in the world today, Chatsabi brings search and conversation together in one focused mobile experience. EARCH AND CHAT YOU CAN RELY ON • Ask anything in plain language — no special commands required • Get answers designed to be clear, useful, and easy to read • See sources and citations so you can verify claims and dig deeper • Turn on web search when you need up-to-date information • Continue the thread with follow-up questions that keep context • Pin, rename, and manage chats when you are signed in VOICE WHEN YOU NEED HANDS-FREE • Tap the microphone to ask by voice • Transcribe speech into text for your next message • Optional spoken replies for a more natural back-and-forth • Great for quick questions on the go GEMS — SPECIALIZED TOOLS IN ONE APP Chatsabi includes Gems: focused workflows for everyday tasks, without switching apps. • Transcribe — turn audio into text • Translate — work across languages • Rewrite — polish tone and clarity • PDF & documents — work with PDFs, Word, Excel, and more • Chart creator — visualize data from spreadsheets • Email agent — connect Gmail or Outlook to search, draft, and manage mail (when you choose to link an account) • Meetings & virtual guest — calendar-aware help when you connect your provider • Lesson tutor & tutor — guided learning support • Site research, YouTube, notes, photo edit, and more Connect only what you use. Many Gems work through secure browser sign-in to your provider — you stay in control. BUILT FOR MOBILE • Clean, dark interface designed for comfortable reading • Fast access to recent and pinned conversations • Composer tools for attachments, web search, and voice settings • Sign in to save chats and sync across devices • Guest mode with limited free chats — upgrade by signing in for more PRIVACY AND PERMISSIONS Chatsabi requests sensitive permissions only when a feature needs them: • Microphone — voice messages and voice-related Gems • Photos / camera — attachments and photo editing (only what you select) • Internet — chat, search, and account features We do not require location, contacts, or broad device access for core chat. Review each permission prompt before you allow access. WHO IS CHATSABI FOR? • Students and professionals who want cited, checkable answers • Anyone tired of vague AI replies without sources • People who juggle email, documents, translation, and research daily • Mobile users who want one assistant instead of many single-purpose apps IMPORTANT Chatsabi can make mistakes. Consider checking important information, especially for health, legal, financial, or safety decisions. Sources help you verify — they are not a substitute for professional advice. GET STARTED Download ChatSabi, ask your first question, and explore Gems from the menu. Create a free account when you are ready to save history and unlock the full experience. Privacy Policy and Terms of Service are available inside the app. Questions or feedback? Use Support in the app menu.

Screenshots

Sigma VPN4 screens
Chatsabi4 screens

Verdict

The call

The clearest difference is iOS requirement: Sigma VPN at 15.0 against Chatsabi's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sigma VPN ships an update every 3 months, Chatsabi every 2 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

Scorecard1 real difference · 9 level
Sigma VPN versus Chatsabi: the parameters behind the verdict, then further details
ParameterSigma VPNChatsabi
PriceFreeFree
Rating3.5 (15 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings15 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size36 MB66 MB
Age rating17+17+
DeveloperSigma Telecom LLCMazino Amuno

In-app purchases

None

Sigma VPN

No in-app purchases

None

Chatsabi

No in-app purchases

Questions

Is Sigma VPN free?
Sigma VPN is free to download, with no in-app purchases.
Is Chatsabi free?
Chatsabi is free to download, with no in-app purchases.
Do Sigma VPN or Chatsabi have ads?
Neither Sigma VPN nor Chatsabi shows ads.
Which is updated more often, Sigma VPN or Chatsabi?
Sigma VPN ships an update every 3 months, and Chatsabi every 2 months. Most recently, Sigma VPN was updated on November 3, 2026 and Chatsabi on October 28, 2026.

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