01 Advisors (01A) is a venture capital firm founded by former Twitter CEO Dick Costolo, former Twitter CRO/COO Adam Bain, and former Facebook CRO David Fischer. The firm invests $10M-$20M in hyper-growth companies at the Series A and B stages after they have achieved product-market fit, focusing on scaling and go-to-market strategy. The founders collectively grew companies from $0 to $123B in yearly combined revenue and created $1T of public company market cap. Operating under the motto "For Operators, by Operators," 01A leverages its partners' extensive operational experience to help founders transform breakthrough products into world-class companies. Signal Plug searches live against 01a.com's mail server to find and verify email addresses for any 01 Advisors employee.
Signal Plug searches live against 01a.com's mail server — not a static database. Get a verified email for any 01 Advisors employee with confidence score in under 2 seconds.
94% accuracy · No credit card required · 10 free searches/month
01 Advisors (01A) is a venture capital firm founded by former Twitter CEO Dick Costolo, former Twitter CRO/COO Adam Bain, and former Facebook CRO David Fischer. The firm invests $10M-$20M in hyper-growth companies at the Series A and B stages after they have achieved product-market fit, focusing on scaling and go-to-market strategy. The founders collectively grew companies from $0 to $123B in yearly combined revenue and created $1T of public company market cap. Operating under the motto "For Operators, by Operators," 01A leverages its partners' extensive operational experience to help founders transform breakthrough products into world-class companies.
The most commonly verified format at 01 Advisors:
Medium ConfidenceSignal Plug tests all common patterns against 01 Advisors's live mail server and returns whichever passes the SMTP check.
Run a live search for 01 Advisors →Data-driven signals to help you prospect 01 Advisors effectively.
Primary Contact
Startup Founders
9–11am PST (12–2pm EST)
Tech hub — decision-makers reachable
Signal Plug performs live SMTP verification against 01a.com's mail server — not a static scraped database — which means results reflect the real, current state of 01 Advisors'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 01 Advisors contacts before upgrading.
Enter the contact's name
Type the first and last name of the 01 Advisors employee you want to reach. Signal Plug handles all seniority levels, from C-suite to individual contributors.
Enter the domain
Use 01a.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 01 Advisors 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 01 Advisors names in a single batch.
01 Advisors competes directly with Andreessen Horowitz, Benchmark, Sequoia Capital and others in the Financial Services space.
| Company | Size | Tier | Focus | Email Format |
|---|---|---|---|---|
| 01 Advisors | 11–50 | Startup | Venture Capital | hello |
| Andreessen Horowitz | — | — | — | firstname.lastname |
| Benchmark | — | — | — | firstname.lastname |
| Sequoia Capital | — | — | — | firstname.lastname |
| Greylock Partners | — | — | — | 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 Financial Services like 01 Advisors.
Based on 01 Advisors's profile, the highest-value contacts for outbound are:
Signal Plug works for any role at any seniority level at 01a.com. If you have a name and the domain, you can find a verified email.
How well 01 Advisors fits a typical B2B outbound pipeline, based on available signals.
Moderate 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 01a.com's mail server using SMTP verification. This means results reflect the current state of 01 Advisors'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 01 Advisors contacts to email first and personalize your outreach before you hit send. Given 01 Advisors's startup footprint (11–50 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 01a.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 01 Advisors employee emails is maintained.
Yes. Growth and Scale plan users can upload a CSV of names and run bulk lookups against 01a.com in a single batch.
01A (01 Advisors) is a venture capital firm founded by former executives of Twitter and Facebook that invests in hyper-growth companies.
01A typically invests $10M-$20M per deal, targeting Series A and B stage companies.
01A was founded by Dick Costolo (former CEO of Twitter), Adam Bain (former CRO/COO of Twitter), and David Fischer (former CRO of Facebook).
01A has offices in San Francisco (415 Jackson, CA 94111) and New York City (817 Broadway, NY 10003).
Signal Plug searches in real time against 01a.com's mail server to find and verify email addresses for 01 Advisors 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