The request names Signal Messenger, which none of these sources describes; the closest match is Home Assistant's notification actions, which can send messages to targets such as Signal if configured, 111. None of the other products is a messaging app, so no alternative covers the request directly.
A question back: Do you want to use Signal Messenger itself as a chat app, or send automated notifications through it?
- 1
Home Assistanthome-assistant.ioverified and signed
Open source home automation whose notify actions (notify.send_message, notify.notify) send messages to selected targets, so it can relay alerts to a messaging channel 111.
for agents: notify.send_message · notify.notify · notify.persistent_notification
Sources
- 1Home Assistanthome-assistant.io · read 2026-10-29
- 11Signal Messenger: declares "notify.send_message" (the record we read and signed)unfragile.ai · read 2026-10-24
Left out: Tryagentroom, because each one's own page says it is retired or discontinued.
For agents: the 10 actions behind this answer
notify.send_message · Signal Messenger verified and signed
Sends a notification message.
enroll · SigRank — Token Efficiency Leaderboard verified and signed
Bind THIS device to your SigRank operator so your signed token runs cascade to the live board. Paste the key from signalaf.com → Settings → "New key" (or "Generate connect code"). On first run it generates + stores a local ed25519 keypair (~/.sigrank-mcp/identity.json); only the PUBLIC key is ever s
Skill Marketplace · SIGNALS Agent API verified and signed
Browse and deploy pre-built agent templates
· Signaliz website read, tools not yet checked
Discover verified companies from any market signal, keep target accounts under watch, verify contacts, and turn dated evidence into outreach with Signaliz.
· SignalPipe website read, tools not yet checked
Hand SignalPipe any text — a Reddit post, an email, a Slack message — and three AI judges decide if the author is a real buyer. REST or MCP, from $29/mo.
· Signal Band website read, tools not yet checked
Decision checks for founders and commercial teams: test a venture or an AI business case against the evidence, and take a board-ready paper to the meeting.
· Run402 Docs Detection Market Phase Signal Zhiji website read, tools not yet checked
Deploy and operate full-stack applications with the Run402 CLI.
· Run402 Docs Gateway Llm Router Signal Zhiji website read, tools not yet checked
Deploy and operate full-stack applications with the Run402 CLI.
· Apple Signal website read, tools not yet checked
Discover the innovative world of Apple and shop everything iPhone, iPad, Apple Watch, Mac, and Apple TV, plus explore accessories, entertainment, and expert device support.
· Signal8 website read, tools not yet checked
Real-time quotes, screeners, insider and congressional trades, dilution risk and AI-analysed SEC filings, in one terminal.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.