Shortlist by what you need
Start here if you know why you are leaving Sigma AI Browser.
Want the closest match?
AnytypeMost similar to Sigma AI Browser in what it does, its category and its price.
Visit (opens Anytype in a new tab)Need a free plan?
remioHas a free plan, rated 4.1 out of 5.
Visit (opens remio in a new tab)Want the lowest price?
SYSTRANFrom $18.99/mo, the lowest starting price here.
Visit (opens SYSTRAN in a new tab)Want the best rated?
VoilaRated 4.0 out of 5 in our review, against 3.8 for Sigma AI Browser.
Visit (opens Voila in a new tab)
At a glance
Green means better than Sigma AI Browser, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Sigma AI BrowserBaseline | 3.8 | Free | Yes | Private browser with an agent that fills forms and books things, plus an offline local model. | |
| Anytype | 4.2+0.4 | $10/mo | Yes | Local-first and encrypted, with no cloud account required | vs Sigma AI Browser |
| remio | 4.1+0.3 | $11.6/mo | Yes | Local-first second brain that captures pages, files, meetings and email, then answers from them. | vs Sigma AI Browser |
| Voila | 4.0+0.2 | Free | Yes | One assistant across five browsers, both mobile platforms and both desktops. | vs Sigma AI Browser |
 Auri | 3.5−0.3 | Free | Yes | AI keyboard and system-wide dictation for Apple devices - improve text in any app, on iPhone, iPad, Watch and Mac. | vs Sigma AI Browser |
 Beam Eye Tracker | 3.8Same | Not listed | No | Webcam-based eye and head tracking for PC games that runs locally, with no extra hardware. | vs Sigma AI Browser |
 PDF Pals | 4.0+0.2 | $29/mo | No | Native Mac app for chatting with PDFs locally using your own OpenAI or Azure API key. | vs Sigma AI Browser |
| SYSTRAN | 4.0+0.2 | $18.99/mo | No | Fifty years of machine translation, with on-premise and custom model training. | vs Sigma AI Browser |
 Helper | 3.5−0.3 | Free | Yes | Native desktop client that puts ChatGPT in its own window instead of a browser tab. | vs Sigma AI Browser |
The alternatives in detail
In order of how closely each one matches Sigma AI Browser.
Anytype
4.2$10/mo
vs Sigma AI Browser+0.4
Local-first and encrypted, with no cloud account required.
- Local-first architecture with end-to-end encryption
- Peer-to-peer sync without requiring a cloud account
- Customizable object-based data model
Genuine local-first, encrypted architecture, not privacy as an afterthought
Peer-to-peer sync can feel less seamless than a pure cloud-sync competitor
remio
4.1$11.6/mo
vs Sigma AI Browser+0.3
Local-first second brain that captures pages, files, meetings and email, then answers from them.
- Automatic capture of pages, files, emails and meetings
- Local storage with no manual filing
- Ask remio conversational search
Local storage for the most sensitive corpus most people assemble
Credit metering means heavy use climbs tiers quickly
Voila
4.0Free
vs Sigma AI Browser+0.2
One assistant across five browsers, both mobile platforms and both desktops.
- Extensions for Chrome, Firefox, Edge, Brave and Safari
- Apps for iOS, Android, macOS and Windows
- Reads webpages, documents and images
Present on every browser and device, so the habit actually forms
No pricing tiers shown
Auri
3.5Free
vs Sigma AI Browser−0.3
AI keyboard and system-wide dictation for Apple devices - improve text in any app, on iPhone, iPad, Watch and Mac.
- AI keyboard working inside any app
- System-wide voice dictation on iOS and Mac
- Text improvement in place
Works where you already type rather than in a separate app
Apple only - nothing for Android, Windows or the web
Beam Eye Tracker
3.8Not listed
vs Sigma AI BrowserSame
Webcam-based eye and head tracking for PC games that runs locally, with no extra hardware.
- Neural-network eye and head tracking from a webcam or phone
- 6DoF head tracking with direct camera control in hundreds of games
- Local processing with no biometric data stored, per the vendor
No extra hardware and a one-time price with no subscription
Webcam tracking can be less precise than dedicated infrared trackers
PDF Pals
4.0$29/mo
vs Sigma AI Browser+0.2
Native Mac app for chatting with PDFs locally using your own OpenAI or Azure API key.
- Local document storage with no file upload to vendor servers
- Bring-your-own API key support for OpenAI, Azure, and OpenRouter
- OCR engine for scanned PDFs and complex forms
Local-first design addresses real privacy concerns around uploading sensitive PDFs
Mac-only, with no Windows or web version for cross-platform teams
SYSTRAN
4.0$18.99/mo
vs Sigma AI Browser+0.2
Fifty years of machine translation, with on-premise and custom model training.
- 55 languages across 30+ file formats
- Translate Server and Private Cloud for on-premise deployment
- Model Studio for training custom translation models
On-premise and private cloud for data that cannot leave the building
No pricing figures on any of the three tiers
Helper
3.5Free
vs Sigma AI Browser−0.3
Native desktop client that puts ChatGPT in its own window instead of a browser tab.
- Native desktop client
- Builds for macOS, Windows and Linux
- ChatGPT access outside the browser
A real window rather than a tab that gets buried
A wrapper around OpenAI's service, dependent on its terms and availability
FAQ
Questions people ask
Is Sigma AI Browser free?
Sigma AI Browser has a free plan.
What is the best free alternative to Sigma AI Browser?
Anytype is the highest-rated alternative here with a free plan (4.2 out of 5). Other free options: remio, Voila, Auri.
What is the cheapest alternative to Sigma AI Browser?
Among paid plans, Anytype has the lowest starting price (from $10/mo). If you need it free, start with Anytype.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.