15Five is an AI-powered strategic performance management platform that helps businesses drive employee engagement, performance, and retention. The platform combines 360° performance reviews, engagement surveys, goal and OKR tracking, manager coaching and training, and feedback tools like guided 1-on-1s and check-ins. Serving over 3,500 companies and 250,000 employees, 15Five leverages generative AI, custom analytics, and human-centered principles to empower HR leaders with data-driven insights and transform managers into changemakers. The company operates on a SaaS subscription model targeting mid-market and enterprise organizations. Signal Plug searches live against 15five.com's mail server to find and verify email addresses for any 15Five employee.
Signal Plug searches live against 15five.com's mail server — not a static database. Get a verified email for any 15Five employee with confidence score in under 2 seconds.
94% accuracy · No credit card required · 10 free searches/month
15Five is an AI-powered strategic performance management platform that helps businesses drive employee engagement, performance, and retention. The platform combines 360° performance reviews, engagement surveys, goal and OKR tracking, manager coaching and training, and feedback tools like guided 1-on-1s and check-ins. Serving over 3,500 companies and 250,000 employees, 15Five leverages generative AI, custom analytics, and human-centered principles to empower HR leaders with data-driven insights and transform managers into changemakers. The company operates on a SaaS subscription model targeting mid-market and enterprise organizations.
The most commonly verified format at 15Five:
High ConfidenceSecondary format also observed: firstname.lastname@15five.com
Signal Plug tests all common patterns against 15Five's live mail server and returns whichever passes the SMTP check.
Run a live search for 15Five →Data-driven signals to help you prospect 15Five effectively.
Primary Contact
VP of People
9–11am PST (12–2pm EST)
Tech hub — decision-makers reachable
From 1 employees in 2011 to ~350 in 2026.
Signal Plug performs live SMTP verification against 15five.com's mail server — not a static scraped database — which means results reflect the real, current state of 15Five's email infrastructure. Here's how to run a lookup:
Create a free account
Sign up at Signal Plug in under 30 seconds. No credit card required. The Free plan includes 10 searches per month so you can test the tool with real 15Five contacts before upgrading.
Enter the contact's name
Type the first and last name of the 15Five employee you want to reach. Signal Plug handles all seniority levels, from C-suite to individual contributors.
Enter the domain
Use 15five.com. Signal Plug tests all common naming patterns automatically and returns only the format that passes the SMTP check.
Get a verified result
Signal Plug returns an email address with a confidence score (0–100) and deliverability status (Valid, Risky, or Catch-all) within 2 seconds. The confidence score tells you how reliable the result is before you use it.
Export and use
One-click CSV export lets you bring 15Five contacts into Salesforce, HubSpot, Outreach, Lemlist, or any other tool in your stack. Growth and Scale plan users can run bulk lookups across an entire list of 15Five names in a single batch.
15Five competes directly with Lattice, Culture Amp, BetterUp and others in the Technology space.
| Company | Size | Tier | Focus | Email Format |
|---|---|---|---|---|
| 15Five | 201–500 | SMB | Human Resources / Performance Management Software | firstname |
| Lattice | — | — | — | firstname.lastname |
| Culture Amp | — | — | — | firstname.lastname |
| BetterUp | — | — | — | firstname.lastname |
| Leapsome | — | — | — | firstname.lastname |
| Reflektive | — | — | — | firstname.lastname |
Based on industry, headcount tier, and growth signals, these companies share a similar profile:
Whether you're running outbound sales, recruiting, or building a partnership list, these are the roles most frequently contacted at Technology like 15Five.
Based on 15Five's profile, the highest-value contacts for outbound are:
Signal Plug works for any role at any seniority level at 15five.com. If you have a name and the domain, you can find a verified email.
How well 15Five fits a typical B2B outbound pipeline, based on available signals.
Strong Fit
Funnel Fit Score
Most email finder tools pull from static databases of scraped email addresses. These databases go stale as people change jobs and companies update their email infrastructure. Signal Plug takes a different approach: every search performs a live check against 15five.com's mail server using SMTP verification. This means results reflect the current state of 15Five's email system — not a cached result from months or years ago.
Signal Plug enriches every result with supporting data: a confidence score (0–100), deliverability status (Valid, Risky, or Catch-all), job title where available, and LinkedIn profile URL. This context helps you prioritize which 15Five contacts to email first and personalize your outreach before you hit send. Given 15Five's smb footprint (201–500 employees), Growth plan users at $149/month get the search volume needed for a full account campaign. Plans start at $29/month for 500 searches — no annual contracts or seat fees.
Signal Plug performs a live SMTP check against 15five.com's mail server for every query — not a static database lookup. Our platform-wide accuracy rate is 94%. Each result comes with a confidence score (0–100) so you can gauge reliability before using the address.
Free plan: 10 searches. Starter ($29/mo): 500. Growth ($149/mo): 2,000. Scale ($299/mo): 5,000. No company-specific caps.
No. Signal Plug generates and verifies emails in real time via SMTP checks — no static database of 15Five employee emails is maintained.
Yes. Growth and Scale plan users can upload a CSV of names and run bulk lookups against 15five.com in a single batch.
15Five is an AI-powered strategic performance management platform that combines reviews, engagement surveys, OKR tracking, manager coaching, and feedback tools to drive employee performance and retention.
Over 3,500 companies rely on 15Five daily, serving approximately 250,000 employees.
Key products include 360° performance reviews, engagement surveys, goal & OKR tracking, manager coaching and training, guided 1-on-1s, check-ins, compensation management, and AI tools like AMAYA and Kona AI Coach.
Notable customers include Credit Karma, HubSpot, and Pendo.
Signal Plug searches in real time against 15five.com's mail server to find and verify email addresses for 15Five employees. Enter a name, enter the domain, get a verified result with a confidence score in under 2 seconds.
Start finding emails free →10 free searches · No credit card required · Upgrade from $29/month