~ % fs-cli stats
FlowSense Statistics ==================== Packets Flows RX 32,676,587 Active 956 Dropped 0 Created 42,026 Bytes RX 38.24 GB Uptime: 4h 54m 13s
Traffic Classification
Runs on your Mac.
No cloud processing needed.
Every Flow.Under Your Control.
Agentic Cyber Intelligence. See every connection your Mac makes. Warden, its AI guard, flags the new ones.
Free on macOS · 7-day full trial
Featured On
A closer look / Live view
A Closer Look / Live View
02 / Flow tree
Follow a Connection Down
Group connections by program, app and hostname, then open a row to see its flows.
ChatGPT6 programs · 19 flowschatgpt.com4 flows · 126 ms
tls1.26 flowsTraffic Classification Engine
Identifies apps and services without decrypting your content.
Signatures1,5894× since 1 October, shipped over the air
Catalogue Entries872
Protocols10
Categories69
State-Machine Signatures and Local AI
State-Machine Signatures
State machines follow each connection's first packets. Same traffic, same answer, every time.
A hostname trie, an Aho-Corasick scan for payload patterns, and multi-packet programs that step through a connection's opening packets in both directions. Correlation tables carry what one connection reveals, such as a DNS answer, a TLS fingerprint or a call's media server, to the next.
Local AI
Warden's model judges each new connection on your Mac: ads, trackers, telemetry, scans.
It reads the engine's labels for the connection and decides whether it needs you. It's a Research Preview: we recommend Ask mode, and its confidence score is not a measure of accuracy. It never decides to slow traffic.
Warden
An AI Guard for Every New Connection.
Warden suggests what to block, slow or allow, or acts on its own in Auto.
Warden · Agentic cyber protectorOn
Needs YouDoneSetup
Done · 45
KKeplr Walletrpc-injective.keplr.appBlocked
HHermes Agenthermes-agent.nousresearch.comAllowed
TTailscale Connectivity CheckNetActuate, Inc. · PolandAllowed
325 processed2 active rules45 allowed
Live
Every Connection, Right Now.
Every connection by program, app and hostname, as it happens.
Last 60 seconds756 flows
↑ 2.2 Mb/s↓ 1.4 Mb/s
ChatGPT6 programs · 19 flows↓ 172 kb/s↑ 22 kb/schatgpt.com4 flows · 126 ms↓ 26 kb/s↑ 644 b/stls1.26 flows↓ 144 kb/s↑ 8 kb/s
npm Registryregistry.npmjs.org · 124 ms↓ 986 b/s↑ 806 b/sFlow Map
See Where Every Connection Goes.
Trace a connection across the world, from your Mac to the server.
Signatures
See What FlowSense Can Name.
Browse the apps, vendors and categories FlowSense recognises, and see what each update added.
872* Entries592* Vendors69* Categories
Recognises the Apps You Use Every Day.From 
YouTube, 
Spotify, 
Zoom To 
GitHub, 
Slack, 
Figma. And Many More.
* List Updated on a Regular Basis.
Policy
Block or Slow Traffic.
Block or slow apps, hostnames or categories.
RulesShapersClassifiersLists
Known bad networksDaily
SSpamhaus DROPNetworks no Mac should talk to
Ad-block listsDaily
EEasyListAds
EEasyPrivacyTrackers
SStevenBlack hostsAds and malware
AAdGuard DNS filterAds
HHaGeZi Multi PROAds and trackers
A list names what to block. A rule does the blocking.
Local AI by Default.
Download a Model. Keep It on Your Mac.
Settings › Intelligence › Change Intelligence › Download. Pick a model that fits your Mac, or choose Apple Intelligence from Installed.
Choose a Model for Each Job.
Settings › Intelligence keeps Chat, voice, speech and Warden choices together. In Change Intelligence, Ollama connects to your own model server.
Bring Your Own Provider and Key.
For Chat and the briefing, open Change Intelligence › API and choose OpenAI or Anthropic. Warden has its own API tab for Jev, Cloudflare Workers AI and OpenAI.
Cloud providers receive the questions or connection details they process.
Connect Your AI Apps.
What used the most data today?
flowsense · usage_report
Tailscale: 2.6 GB of today's 2.7 GB. Then Zoom at 48 MB and Slack at 21 MB.
With Allow Changes on, block advertising on a 5-minute trial
flowsense · set_access_rule
Done. Advertising is blocked until 3:20 PM, then unblocks unless you keep it.
MCP for Any AI App
Claude Code, Codex, Cursor or any MCP app can read traffic. Allow Changes gives reconnected apps permission to write rules. The server runs only on your Mac, behind a token.
With the Window Closed
Keeps Running With the Window Closed
Close the window. The engine, MCP and your rules stay on.
The Command Line
Your Network. At Your Prompt.
Live traffic, rules and diagnostics from your terminal.
Bundled with FlowSense. Try it here.
Sample data. Click to type. Tab to complete · ↑ for history.
Take It for a Spin
On your Mac: Settings › General › Command-Line Tool
All Commands 54 entries
Choose a command to try a sample. Add --help for its flags. Router commands need a router engine.
Observe
Signatures and Maps
Policy
Engine
Sharing
Shell
Router
No matching commands. Try a shorter search.
FlowSense vs the Competition
| Identifies | Slows traffic | AI guard | |
|---|---|---|---|
| FlowSense | The app, and the service inside its traffic | Yes, per classified service or host | Warden, on your Mac |
| Little Snitch | App and host | — | Version 7 beta: on request, in the cloud |
| LuLu | App and host | — | — |
| FireAI | App and host | — | On-device, blocks on its own |
Pricing
Free to Watch. Pay Once to Take Control.
Free
View-Only
$0No Time Limit
- Every Connection in Live
- 800+ Apps and Services Named
- Map Any Connection
What Free includes
See every connection; change nothing. Live, Today's charts, the map and the menu bar stay free after your trial.
A free account is required.
Trial
Everything, Free
7 daysEvery Feature
- Starts When You First Sign In on a Mac
- Nothing to Cancel
How the trial works
One trial per account, on one Mac. A Mac that has had a trial cannot get another under a different account.
Back to Free afterwards, unless you buy. The trial ends by itself.
Full
FlowSense Full
$49One-Time · 1 Mac
- Everything in Free
- Warden in Ask or Auto
- Rules to Block or Slow Traffic
What Full includes
- Block Lists Feed Rules for Ads, Trackers and Threats
- Chat, Voice and the Daily Briefing
- MCP for Claude, ChatGPT, Cursor and VS Code
A block list only names traffic; a rule blocks it. Chat reads your traffic but can't change rules.
Warden, rules that block or slow, block lists, Chat, the daily briefing and MCP need Full.
For Warden, we recommend Ask, which waits for you before acting. Auto is a Research Preview.
Auto blocks only when at least 80% sure. Every block starts as a 5-minute trial. It takes at most 3 actions in 10 minutes and 20 a day. Confidence is not accuracy.
It never touches Apple updates, iCloud, DNS, macOS or FlowSense.
The bundled model runs on your Mac and always asks before slowing traffic. A cloud decision provider gets connection details and can slow traffic in Auto.
Price and license terms
Pay once for FlowSense and all future app updates. If subscriptions arrive, you keep every feature you paid for and every app update. New services that cost us money each time you use them, such as hosted AI, may be sold separately.
Full refund within 30 days of paying. Discount codes are accepted at checkout. Not available in the EU, the UK, Iceland, Liechtenstein or Norway yet.
See Every Connection. Guard the New Ones.
DownloadMake it yours
Eleven Themes. One of Them Whips the Packets.
- Light, Dark, or Follow Your Mac
- Pick What the Menu Bar Shows
- Choose Live's Columns and the Order of Its Tree
5 more themes
