# Signal-Based Outbound > Signal-based outbound is B2B prospecting where you only reach out after a prospect does something that suggests they might buy, such as viewing your profile, engaging with a competitor, changing jobs, hiring, or raising money. This site explains the method, each buying signal, how fast signals expire, worked examples, the playbook and the tools. It is published by Valley. Key definition: Signal-based outbound is a B2B prospecting method where you only reach out to a prospect after they show a buying signal, such as viewing your profile, engaging with your posts or a competitor's, visiting your website, starting a new job, hiring for a relevant role or raising money. ## The basics - [What is signal-based outbound?](https://signalbasedoutbound.com/index.md): Signal-based outbound means messaging prospects only after they do something that suggests they might buy. A plain-English definition and how to start. - [Buying signals for B2B outbound, ranked](https://signalbasedoutbound.com/buying-signals/index.md): The B2B buying signals worth acting on, ranked: profile viewers, post engagers, site visitors, competitor followers, job changes, hiring and funding. - [How to run signal-based outbound: a step-by-step playbook](https://signalbasedoutbound.com/playbook/index.md): A seven-step signal-based outbound playbook: choose signals, capture them daily, qualify hard, research, write a message that earns a reply, send fast, measure. - [Signal-based outbound vs cold outbound](https://signalbasedoutbound.com/vs-cold-outbound/index.md): Signal-based vs cold outbound on reply rates, list size, cost and effort, with data from 7.3 million prospects, plus when cold outbound still makes sense. - [Signal-based outbound tools: the stack vs one system](https://signalbasedoutbound.com/tools/index.md): What you need to run signal-based outbound, what the usual five-tool stack costs, what to look for in software, and where Valley fits (and where it doesn't). - [Signal-based outbound FAQ](https://signalbasedoutbound.com/faq/index.md): Answers to the common questions about signal-based outbound: reply rates, list size, whether it is creepy, LinkedIn limits, and how much it costs. ## Buying signals - [LinkedIn profile viewers: how to turn them into outreach](https://signalbasedoutbound.com/signals/profile-viewers/index.md): LinkedIn profile viewers outreach: where to find viewers, how to qualify them, how fast to act, and example messages that never mention the view. - [LinkedIn post engagers as leads: who to message and how](https://signalbasedoutbound.com/signals/post-engagers/index.md): How to turn LinkedIn post engagers into leads: weigh comments over likes, qualify hard, act within days, and write messages about the topic, not the like. - [Competitor followers outreach: borrowing their audience](https://signalbasedoutbound.com/signals/competitor-engagers/index.md): Competitor followers outreach done right: message engagers, watch followers, filter out their staff and customers, never name the competitor. - [Website visitor identification for outreach: what works](https://signalbasedoutbound.com/signals/website-visitors/index.md): Website visitor identification outreach: company vs person-level matching, which pages show intent, GDPR caution, and messages that never mention the visit. - [Job change signals in sales: new leaders and champions](https://signalbasedoutbound.com/signals/job-changes/index.md): Job change signals for sales: why new leaders review tools in their first 90 days, when to reach out, how to track moved champions, and example messages. - [Hiring signals for sales prospecting: reading job ads](https://signalbasedoutbound.com/signals/hiring/index.md): Hiring signals for sales prospecting: what a job ad reveals, where to find them, who to contact instead of the recruiter, and how to reference the ad well. - [Funding round outreach without joining the pile](https://signalbasedoutbound.com/signals/funding/index.md): Funding round outreach that stands out: read the use of funds, wait out the first week, reach the plan's owner, and stack funding with stronger signals. ## Guides - [How fast do buying signals expire?](https://signalbasedoutbound.com/signal-decay/index.md): How fast do buying signals expire? Response windows for every signal, from hours to 90 days, why speed beats polish, and a daily rhythm to stay inside them. - [Signal-based outbound examples: 9 worked messages](https://signalbasedoutbound.com/examples/index.md): Signal based outbound examples: nine worked cases from signal to person to why now to message, plus when to mention the trigger and when never to. - [Signal-based selling: how sales teams use buying signals](https://signalbasedoutbound.com/signal-based-selling/index.md): Signal based selling explained: how it differs from signal-based outbound, how reps rank accounts by fit and signal, and how to stack signals across a deal. - [Signal-based outbound vs intent data](https://signalbasedoutbound.com/vs-intent-data/index.md): Signal based outbound vs intent data: person-level first-party signals against account-level third-party intent, when each helps, and how to combine them. - [Buying signals glossary](https://signalbasedoutbound.com/glossary/index.md): A buying signals glossary: 30 terms from abandoned signup to warm outbound, each defined in plain English, with links to full guides on signal-based outbound. ## Optional - [Everything on this site as one text file](https://signalbasedoutbound.com/llms-full.txt) - [Sister site: Warm outbound, explained](https://warmoutbound.site/llms.txt) - [Valley](https://joinvalley.co/?utm_source=signalbasedoutbound): Valley is an AI outbound platform that finds the people most likely to buy from you - from live buying signals, natural-language search, or your own lists - qualifies them against your ICP, researches each one, and sends personalised messages that get 15-45% reply rates, against a category average of about 2%. Pricing (Valley): Starter is $199 a seat a month, or $149 a month billed quarterly, for LinkedIn outreach. 7-day free trial, card required. Teams book a demo for Plus, Growth and Scale.