Signl is a social listening engine for LinkedIn. It follows the conversations your market takes part in (your own posts, your competitors’, and the creators your buyers follow), picks out the people showing buying intent, checks each one against who you sell to, finds a verified work email and writes a reason to reach out and an opening line grounded in what they said. It keeps listening in the background, and works from the Signl inbox or from Claude, ChatGPT or any MCP-compatible agent.
What you get for each person
- What they said. Their comment, and the post they left it on, linked so you can read the thread.
- Why they matter. A one-line reason, a read of their intent (a question, a pain point, a buying signal) and how well they fit who you sell to, with a confidence score.
- What to say. A suggested opening line built from their comment, and which of your offers to lead with. Edit either before you send.
- How to reach them. A verified work email for the people worth contacting, ready to add to an Instantly campaign.
People with nothing to reply to, job seekers and people selling their own services in the comments are set aside before anything is spent on them. You can see every one and the reason on the Filtered out tab, and restore anyone we got wrong.
What makes it different
A comment is someone telling you, in their own words and in public, what they care about this week. That makes a better first line than any firmographic filter, and a warmer list than any database.
Signl is also built for an agent to use. Ask Claude to watch three competitors, and Signl keeps checking in the background. Ask again tomorrow, in a new conversation, and it tells you who has commented since. The agent does not have to remember anything; Signl keeps track.
Getting started
Signing up is free and takes a minute, with no credit card. Start by defining your ICP, including what you sell and the offers you can lead with, because that is what every commenter is measured against. Then add a LinkedIn profile to watch, or connect your agent and ask it to.