AssemblyAI builds industry-leading Speech AI models for automatic speech recognition and understanding, serving as critical infrastructure for Voice AI applications. The company offers speech-to-text, streaming transcription, speech understanding, LLM Gateway, guardrails, and speech-to-speech products through a developer-first API with usage-based pricing. AssemblyAI serves Fortune 500 companies and startups across use cases including conversation intelligence, medical transcription, contact centers, voice agents, and AI notetakers. The company has raised over $63M in funding, including a $50M Series C led by Accel, and positions itself as the best way to build Voice AI apps with superhuman Speech AI models. Signal Plug searches live against assemblyai.com's mail server to find and verify email addresses for any AssemblyAI employee.
Signal Plug searches live against assemblyai.com's mail server — not a static database. Get a verified email for any AssemblyAI employee with confidence score in under 2 seconds.
94% accuracy · No credit card required · 10 free searches/month
AssemblyAI builds industry-leading Speech AI models for automatic speech recognition and understanding, serving as critical infrastructure for Voice AI applications. The company offers speech-to-text, streaming transcription, speech understanding, LLM Gateway, guardrails, and speech-to-speech products through a developer-first API with usage-based pricing. AssemblyAI serves Fortune 500 companies and startups across use cases including conversation intelligence, medical transcription, contact centers, voice agents, and AI notetakers. The company has raised over $63M in funding, including a $50M Series C led by Accel, and positions itself as the best way to build Voice AI apps with superhuman Speech AI models.
Competitive Advantage
Universal-3 Pro is positioned as the first promptable speech language model, combining traditional speech recognition with language model prompting capabilities. The company offers free access to Universal-3 Pro throughout February, reflecting high confidence in competitive performance. AssemblyAI's speech understanding models go beyond transcription to identify speakers, extract key information, and uncover insights from audio data. The platform serves as critical infrastructure for multiple leading VoiceAI products including Granola and Dovetail, indicating strong product-market fit. Leadership values include 'Play to win' philosophy focused on building a top 1% company with emphasis on craftsmanship and quality.
The most commonly verified format at AssemblyAI:
Medium ConfidenceSignal Plug tests all common patterns against AssemblyAI's live mail server and returns whichever passes the SMTP check.
Run a live search for AssemblyAI →Data-driven signals to help you prospect AssemblyAI effectively.
AssemblyAI sells to top VoiceAI companies, from startups to Fortune 500s, seeking to unlock value from voice data and launch best-in-class voice products. The platform appeals to developers and product teams building transformational AI-powered audio products who need reliable, accurate speech-to-text and understanding capabilities at scale.
Primary Contact
Product Managers
Tuesday–Thursday, 9am–11am
Signal Plug performs live SMTP verification against assemblyai.com's mail server — not a static scraped database — which means results reflect the real, current state of AssemblyAI'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 AssemblyAI contacts before upgrading.
Enter the contact's name
Type the first and last name of the AssemblyAI employee you want to reach. Signal Plug handles all seniority levels, from C-suite to individual contributors.
Enter the domain
Use assemblyai.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 AssemblyAI 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 AssemblyAI names in a single batch.
Whether you're running outbound sales, recruiting, or building a partnership list, these are the roles most frequently contacted at Technology like AssemblyAI.
Based on AssemblyAI's profile, the highest-value contacts for outbound are:
Signal Plug works for any role at any seniority level at assemblyai.com. If you have a name and the domain, you can find a verified email.
How well AssemblyAI fits a typical B2B outbound pipeline, based on available signals.
Good 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 assemblyai.com's mail server using SMTP verification. This means results reflect the current state of AssemblyAI'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 AssemblyAI contacts to email first and personalize your outreach before you hit send. Plans start at $29/month for 500 searches — no annual contracts or seat fees.
Signal Plug performs a live SMTP check against assemblyai.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 AssemblyAI employee emails is maintained.
Yes. Growth and Scale plan users can upload a CSV of names and run bulk lookups against assemblyai.com in a single batch.
AssemblyAI provides industry-leading Speech AI models including speech-to-text, streaming transcription, and speech understanding capabilities delivered through a developer-first API.
AssemblyAI uses usage-based pricing that scales effortlessly to millions of hours of audio processing.
Universal-3 Pro is the first promptable speech language model, designed as the most accurate real-time transcription model for voice agents.
Major customers include Zoom, Siro, Granola, Dovetail, Ashby, and Cluely, spanning from startups to Fortune 500 companies.
Signal Plug searches in real time against assemblyai.com's mail server to find and verify email addresses for AssemblyAI 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