Reference

Services

Synapse stays simple by default. Every power feature lives in a service you switch on yourself, and the app looks exactly as it did before that service existed while it's off.

Open Settings > Services (or Services in the More menu or the command palette, which open the same page) to turn any of these on or off. Turning a service off removes its menu items, panels, shortcuts and background work straight away; nothing it added stays behind.

Everything is free in 0.x

Synapse doesn't gate any service behind a licence yet. A small number are marked "Pro" below for when licensing switches on in a later major version; until then they work the same as any other service.

Connections

Service	Default	What it adds
Advanced SSH Extra connection options for complex networks and hardware keys.	Off	Jump hosts (ProxyJump chains) Agent forwarding HTTP and SOCKS5 proxies Shared identities for many hosts and groups Per-host environment variables and login scripts SSH certificates; security keys (FIDO2) use System OpenSSH Connection security details
Persistent sessions Keep remote shells running through dropped connections and sleep.	Off	Shells run inside tmux (or screen) on the server Reattach automatically after reconnecting Per host, or for all hosts by default
Advanced tunnels More port-forwarding types and tunnels that start with a host.	Off	Remote (-R) and SOCKS (-D) forwarding Saved tunnels per host that start automatically X11 forwarding to a local X server
Serial and Telnet Connect to network gear and devices over serial ports or Telnet.	Off	Serial port sessions (baud rate, parity, flow control) Telnet sessions

Terminal

Service	Default	What it adds
Logs and recordings Save what happens in your sessions.	Off	Session logs to files, for all sessions or chosen hosts Recordings you can replay Audit log of AI actions
Highlights and triggers Colour important output and react to it automatically.	Off	Keyword highlighting Triggers that notify, play a sound or send input
Smart input Help while you type commands.	Off	Autocomplete from history, paths and snippets (`Tab` or `Right arrow`) Plain English to command (`Ctrl`+`I`) Next-command suggestions Explain or fix failed commands

Files

Service	Default	What it adds
Folder sync Compare and sync local and remote folders side by side.	Off	Side-by-side local and remote folders Compare by size and time, or by checksum Upload, download or mirror, with a preview of every change

AI

Service	Default	What it adds
Agent hub See and answer your AI coding agents without reading raw terminal output.	Off	Live status of Claude Code, Codex, Gemini CLI, Aider and other agents in your terminals "Needs you" alerts with badges and desktop notifications Dashboard of agents on every host, with quick replies and approvals Focus view: a calm summary instead of raw terminal output Resume agents running in tmux and recent conversations Readable, searchable transcripts (secrets hidden) Prompt composer (`Ctrl`+`G`) Structured mode (ACP): a chat view with exact status and approvals for Claude, Codex, Gemini and OpenCode
Agent workflows Run and review agent work at scale.	Off	Parallel agents in git worktrees, inside tmux Review agent changes with line comments, then commit, push or open a PR Task board that follows your agents Scheduled headless agent runs (while Synapse is open, or in the host crontab) Plan review with comments Relay across all open sessions (opt-in)
Stack harnesses (Pro) Rules, settings and checks that make AI coding agents build the way an expert in your stack would.	Off	Detects the stack of a project folder (Laravel, WordPress, Next.js...) and suggests a harness Writes agent rules, settings and commands into the project, merged with what is already there Preview of every change before writing, with permissions and hooks called out Update or remove cleanly: only what the harness added is taken out Checks as one-click buttons with pass or fail, and stack commands in Session tools Newer harness versions from a signed online catalogue See Harnesses for the full list.
AI guardrails Safety checks for anything sent to or suggested by AI.	On	Hide secrets before sending to AI Flag risky commands and always confirm them
AI usage and limits Track what AI costs and handle usage limits.	Off	Token and cost tracking Usage-limit countdown and retry
Voice dictation Dictate commands and prompts by voice.	Off	Dictate into terminals and the Relay composer with a shortcut (`Ctrl`+`Shift`+`Space`) or a mic button Enter inserts the text without running or sending it; Esc cancels Speech recognised on this computer (whisper.cpp) or by OpenAI, Gemini or Grok Model downloads, microphone choice, language and hold to talk in Settings

Hosts and sync

Service	Default	What it adds
Web preview Open a web app running on a server in a built-in browser.	Off	Open a server port through an automatic tunnel, or any address Browser window with address bar, back, forward, reload and device sizes Screenshots, saved or attached to Relay
Cloud and containers Find servers and containers automatically.	Off	Import servers from AWS EC2, DigitalOcean, Hetzner Cloud, Linode and Vultr Refresh imported hosts: new addresses, servers that are gone Docker containers and Kubernetes pods of a connected host Open a shell in a container or pod in a new pane
Server health CPU, memory, disk and processes for the connected host.	Off	Health view in session tools: CPU, memory, swap, disks, network, load and uptime Process list with filter, stop and kill Reads the server only while the view is open
Sync between devices End-to-end encrypted sync of hosts and the vault.	Off	Pair devices with a QR code or a short code Hosts, groups, snippets, chosen settings and the vault Encrypted before it leaves your device; the mailbox only stores what it cannot read Your own mailbox: a small PHP script on your web hosting Device list: rename, remove (replaces the sync key) See Sync and the phone app.
Teams Share hosts with teammates without sharing personal passwords.	Off	Shared team vaults on the same mailbox, end-to-end encrypted Invite by code; owners and members Share hosts and snippets; credentials only when placed in the team vault Removing a member replaces the team key

A service whose name says "Coming soon" on the Services page isn't built yet and can't be switched on; everything listed above is available today in 0.2.5.