SentiLink
SentiLink sells fraud detection software for financial institutions, using machine learning to spot fake identities during account openings. The San Francisco-based company has raised $84M and employs 194 people.
The growth story
SentiLink grew from 40 to 194 employees between 2021 and 2026, raising $84M along the way, most recently a Series B in August 2021.
About
SentiLink provides fraud prevention tools that banks and fintechs use to verify identities when customers open accounts. Its software detects synthetic identities, stolen credentials, and first-party fraud attempts using machine learning models trained by risk analysts.
The company raised $84M in a Series B round in 2021, backed by investors including Andreessen Horowitz and Craft Ventures. It serves major U.S. banks, credit unions, and fintech unicorns, though its exact customer count isn't disclosed.
Founders and leadership
Engineering is SentiLink's largest department with 33 staff. The company has a median employee tenure of 2 years, suggesting moderate turnover.
The SentiLink org chart
Naftali Harris (Co-Founder and CEO) leads 60 mapped leaders with 5 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Engineering 55 (+17% YoY), Business Development 24 (+33% YoY), Information Technology 18 (+13% YoY), Human Resources 12 (+9% YoY), Sales 11 (+10% YoY), Finance 10 (0% YoY).
Talent flow
SentiLink hires heavily from fraud detection firms like Affirm, Ekata, and Socure. Alumni often move to security startups, with P0 Security being the top destination.
Most common previous employers of SentiLink staff: Affirm (12), Ekata, a Mastercard company (7), Prove (6), Socure (6), Amazon (6), ID.me (5). Former SentiLink employees most often moved to P0 Security (3), Databricks (2), Gigs (2), Self (2), Indagari (2), Navigate (2).
Alumni worth knowing
The SentiLink mafia
Three SentiLink alumni have founded companies, including Fernstone (YC F25) and Indagari. These startups employ a combined 14 people.
3Bryant Le, was Software Engineer until 2025Jennifer Zelenty, was Founding Product Manager until 2021Stan Tronik, CPA, was Controller until 2026Hiring now
Web traffic
Traffic mix: 26% direct, 53% search, 9% social, 1% paid.
What this company is made of
Most common skills at SentiLink: Leadership (87), Microsoft Office (73), Python (Programming Language) (71), SQL (58), Microsoft Excel (55), Management (53), Data Analysis (51), Customer Service (50).
Where the team actually sits
SentiLink people are concentrated in California, United States (22), Texas, United States (18), San Francisco Bay Area (13), New York, United States (12).
Search footprint
SentiLink attracts about 2,431 organic search visits a month, traffic worth roughly $11K a month if bought through ads. It gained 472 ranking keywords and lost 362 in the last period.
What employees say
- Compensation
- 4.00 / 5
- Career opportunities
- 3.30 / 5
- Senior management
- 3.10 / 5
- Work-life balance
- 2.80 / 5
Frequently asked
SentiLink has 194 employees as of September 2026.
SentiLink has raised $84M in total, most recently a Series B round in August 2021.
SentiLink was founded in 2017 by Naftali Harris, Maxwell Blumenfeld.
Naftali Harris (Co-Founder and CEO) sits at the top of SentiLink's reporting structure, with 5 direct reports.
The most common previous employers of current SentiLink staff are Affirm (12 people), Ekata, a Mastercard company (7 people), Prove (6 people).
Former SentiLink employees most often move to P0 Security (3), Databricks (2), Gigs (2).
At least 3 companies have a founder who previously worked at SentiLink, including Fernstone (YC F25), Indagari, BooksClose.
SentiLink attracts about 2,431 organic search visits a month, worth roughly $11K a month in equivalent ad spend.
The most common skills among SentiLink staff are Leadership, Microsoft Office, Python (Programming Language), SQL, Microsoft Excel.
SentiLink staff are concentrated in California, United States (22), Texas, United States (18), San Francisco Bay Area (13).
SentiLink has about 55 people in Engineering, up 17% over the past year, as of September 2026.
SentiLink has about 24 people in Business Development, up 33% over the past year, as of September 2026.
Computed from 169 current and 94 former SentiLink profiles, as of September 2026. Source: Crustdata.
Build this for any company
Every number on this page came from the Crustdata API. Point the MCP at a company and get the same org chart, alumni list and talent flow in one prompt.