/Companies

Segment

acquired by TwilioYC S11YC Top CompanyTop employer of YC founders · 13

San Francisco, US · Founded 2011 · Tennessee LLC · 550 employees · 21 known investors

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Segment is a customer data platform that collects, unifies, and activates first-party customer data from multiple touchpoints, enabling businesses to create unified customer profiles and orchestrate personalized experiences across 750+ integrations and destinations.

Also known as ClassMetric, Inc. · Segment.io, Inc. · Twilio Segment

Data & InfrastructureEnterprise SoftwareMarketing TechSaaSB2BUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S11)

Segment was founded in 2011 by Ilya Volodarsky, Calvin French-Owen, Peter Reinhardt, and Ian Taylor.

IVIlya Volodarsky
Ilya VolodarskyFounderCo-founder of Segment, a customer data platform that was acquired by Twilio in 2020. He now works at Wildfires.org, developing software and hardware to help plan and implement hazardous fuel treatment projects aimed at reducing catastrophic wildfires.30 Under 30 2015
CFCalvin French-Owen
Calvin French-OwenCTO2011–2020Angel investor30 Under 30 2015
PRPeter Reinhardt
Peter ReinhardtCEO2011–2022Reinhardt co-founded Segment in 2011 and led it as CEO through 2022, having earlier worked as a research assistant at the Naval Postgraduate School and co-founded Iomys Labs. He has since founded Charm Industrial, Revoy, Antipode and Geoforge, and served on the board of Arcadia from 2021 to 2024.30 Under 30 2015
IT
Ian TaylorCofounder30 Under 30 2015
JG
Jenn GarrettExecutive
AB
Andrew BeairdExecutive
MD
Mark DeutschmannExecutive
AS
Albert StrasheimDirector of Engineering, Foundation
SS
Shannon SellersRecruiter
NH
Nicole HirschGTM Recruiting Manager
GN
Gurdas NijorSenior Engineering Manager
MT
Michael TanSenior SIRT Manager

Investors · 21

Greycroftlisted by GreycroftNew York · $100K – $5M

How we know: Greycroft's portfolio page · the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · company funding news (hacker news) · segment.com · open dataset · 5k.vc investor directory · Not right? Tell us

Agrolimen Venturesreported

How we know: Y Combinator's founder network · Not right? Tell us

General CatalystreportedSan Francisco · $30M

How we know: Y Combinator's founder network · Not right? Tell us

Meritech Capital PartnersreportedPalo Alto · $5M – $40M

How we know: a partner's Signal profile · Y Combinator's founder network · open dataset · 5k.vc investor directory · Not right? Tell us

Start Capitalreported

How we know: Y Combinator's founder network · Not right? Tell us

Also in the syndicate · 1

Y Combinator Continuity Fundlead

Funding

SEC filings, press & company announcements

$129M disclosed across 3 of 5 rounds · 2014–2017

▶$975KraisedNov 2017 · 12 investors · Residential
Rule 506(b)
Officers, directors & promoters on the filing
  • Jenn GarrettExecutive Officer
  • Andrew BeairdExecutive Officer
  • VP Holdings LLCDirector
  • Mark DeutschmannExecutive Officer
Offering amount
$975K
Amount sold
$975K
First sale
Nov 2017
Incorporated
Limited Liability Company, Tennessee, 2017
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Company profile

researched Aug 2026

Segment is a customer data platform (CDP) offering software and APIs to collect, clean and control customer data. Businesses implement event tracking through a single Segment API rather than integrating a separate API for each downstream tool or database, and Segment then routes that data to analytics, marketing automation and data-warehouse destinations [2]. The product line is organized around Connections (a customer data pipeline that collects first-party data from every touchpoint and activates it to a data warehouse or one of 550+ destinations), and a combined CDP offering of Connections plus Unify and Engage for unified profiles, advanced audience building and real-time journey orchestration [0][1].

The company is now part of Twilio and is marketed as Twilio Segment; its website states that the Segment and Twilio sites are being merged, with Segment products, documentation and resources available and supported on Twilio.com, and that customers can combine Segment data with the wider Twilio platform for communications and AI [0][1]. Segment publishes an integrations catalog of 750+ integrations, plus recipes, GitHub libraries, documentation, a help center with an AI assistant, and a partner program for implementation and pre-built integrations [0][1].

Segment operates a public trust center describing its security and privacy program. Listed compliance frameworks include CCPA, GDPR, HIPAA, ISO/IEC 27001 (with a Statement of Applicability), ISO/IEC 27017:2015, ISO/IEC 27018:2019 and SOC 2, and the portal covers product security, data security, app security, access control, infrastructure (including Amazon Web Services), endpoint, network and corporate security, along with pentest and DR test reports [3].

Founding story

Segment was founded in 2011 and went through Y Combinator's Summer 2011 batch [2]. Three of the founders, including CEO Peter Reinhardt, dropped out of MIT to take part in the program [4]. The team spent about a year and a half pivoting without product-market fit, first building a classroom lecture tool and then an analytics tool, with roughly six months of runway remaining when they released a simple open-source JavaScript library on Hacker News; the strong response, and user requests for a hosted version, led to the pivot into a customer data platform [6]. A secondary profile lists the founders as Peter Reinhardt, Ilya Volodarsky, Calvin French-Owen and Ian Storm Taylor, motivated by the difficulty of collecting and managing customer event data across multiple platforms [5].

Business model

Segment sells a software/API platform on a self-serve and sales-assisted basis, with a free entry point ("Start for free"), published pricing pages for Connections and for the full CDP bundle, and a "Contact sales" motion for larger deals [0][1]. A description of its differentiation cites flexible pricing models scaling from startups to enterprises [5].

Subscription/usage-based software pricing for the Connections pipeline and the Connections + Unify + Engage CDP bundle, with separate published pricing for each product line [0][1]. Company history includes a period of growth around $12-13M ARR and a subsequent $20M ARR milestone reached after a pricing and packaging overhaul [6].

Traction

More than 15,000 customers as of July 2017, including Intuit, Atlassian and Gap [4]. Team size of 550 per Y Combinator [2]. A secondary profile states Segment serves over 25,000 companies and processes trillions of API calls annually [5]. The company reached roughly $12-13M ARR during a period of stalled growth and later hit a $20M ARR goal [6].

Latest developments

Segment's website announces that segment.com is being merged into Twilio.com, with the same CDP products, documentation and support available there [0][1]. Product positioning now emphasizes combining Segment data with the broader Twilio platform for communications and AI [0][1].

▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Positioned as a central customer data platform sitting between a company's data sources and its analytics and marketing tools; CEO Peter Reinhardt argued that rather than consolidating, the marketing/analytics tool landscape continues to fragment into specialized tools, increasing demand for data infrastructure that connects them [4]. Y Combinator classifies the company as SaaS/B2B [2].

A single API and large integration catalog remove the need to implement each downstream tool separately, and more than 200 tools had been built on top of Segment as of 2017, about 30% of them by third-party partners rather than Segment [4][2]. Additional cited differentiators include real-time event-driven collection, identity resolution and audience activation in one suite, warehouse-centric zero-copy architecture, developer tooling (SDKs, APIs, Terraform provider), and privacy/compliance capabilities [5][3].

Technology

A single event-collection API and SDK set gathers first-party data from websites, apps, servers and cloud services, then cleans and routes it in real time to a data warehouse or to 550+ destinations, with a broader catalog of 750+ integrations [0][1][2]. Layered products provide identity resolution and unified profiles (Unify) and audience building and journey orchestration (Engage), including use of warehouse data to enhance experiences [0][1]. Secondary descriptions characterize the architecture as event-driven with zero-copy use of the data warehouse as a source of truth, high-capacity event streaming, SDK libraries, pre-built integrations, and infrastructure-as-code support via APIs and a Terraform provider [5]. Infrastructure runs on Amazon Web Services and includes virtual private cloud, firewall, SIEM, logging and access-monitoring controls [3].

Go-to-market

Developer-led and self-serve entry via free sign-up, documentation, open-source libraries on GitHub, recipes and an integrations catalog, combined with a direct sales motion ("Contact sales") and a partner ecosystem for implementation and pre-built integrations [0][1]. Distribution now also runs through the Twilio platform and Twilio.com following the website merger [0][1]. Early growth came from launching an open-source JavaScript library on Hacker News, which reached the top of the site and generated thousands of GitHub stars and email signups, revealing demand for a hosted service [6].

Digital businesses of all sizes needing to unify fragmented customer data, spanning startups through large enterprises; named customers include Intuit, Atlassian and Gap, and data sources integrated include Stripe, Salesforce, Mailchimp and Zendesk [4]. Segment was initially adopted by startups, with the company later targeting large enterprises [4].

Geography

Headquartered in San Francisco [2][5]; the referenced sources do not detail additional office locations.

History

Founded in 2011 out of Y Combinator's Summer 2011 batch [2], Segment pivoted to customer data infrastructure after an open-source launch on Hacker News [6]. It raised a $64M Series C in July 2017 led by the Y Combinator Continuity Fund and GV, bringing total funding to $109M at the time, with Ali Rowghani joining the board [4]. A fractional CFO engagement beginning shortly after the seed round supported financial strategy, including a shift to annual prepayment terms to reduce burn; the company later worked through a growth slowdown at $12-13M ARR before reaching $20M ARR [6]. Segment was acquired by Twilio in a $3.2 billion deal, and Y Combinator lists its status as acquired [6][2]. Co-founder and CEO Peter Reinhardt subsequently became CEO of Charm Industrial [6]. In its current form the business operates as Twilio Segment, with its website being consolidated into Twilio.com [0][1].

Risks & controversies

One aggregator profile lists Segment's status as "Inactive" and reports $286.6M raised across five rounds, which conflicts with Y Combinator's "Acquired" status and with the $109M total funding reported at the 2017 Series C; these figures could not be reconciled from the available sources [5][2][4]. The consolidation of segment.com into Twilio.com indicates the brand is being folded into the parent company's web presence [0][1].

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Acquisition valueSep 2024$3.2B
ARRSep 2024$20M
Companies servedJan 202525,000 companies
CustomersJul 201715,000 customers
DestinationsJan 2025550 destinations
Employee rangeJan 2025501-1000
IntegrationsJan 2025750 integrations
Team sizeJan 2025550 employees
Tools built on top of SegmentJul 2017200 tools
Total funding raisedJul 2017$109M
Total funding raised (aggregator, conflicting)Jan 2025$286.6M

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

10 people who came through Segment went on to found or lead other companies.

Related companies · 10

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AmplitudeAmplitude provides an AI analytics platform that helps companies understand customer behavior and make data-driven product decisions. The platform serves product and engineering teams across enterprises looking to optimize user experience and digital innovation.
HeronHeron builds AI software that automates document-heavy workflows for financial services, insurance, and professional services firms. The platform uses large language models to handle repetitive, error-prone processes like small business underwriting and transaction categorization.
OracleOracle sells enterprise database software, applications and cloud infrastructure, and has grown through large acquisitions including PeopleSoft, Siebel and Sun Microsystems.
MagiCodeMagiCode provides an AI agent that generates, audits, and validates frontend code, then submits pull requests on behalf of development teams seeking to reduce manual coding work.
Zendesk New YorkThis is Zendesk's internal belonging/diversity and inclusion program page, not a company profile page for an external company. It describes Zendesk's internal culture initiatives and leadership development programs.

Companies working in the same space as Segment.

Timeline · 5

launches, deals, and filings
Jan 2025
segment.com consolidated into Twilio.com

Segment announced it is merging its website into Twilio.com, where the same CDP products, documentation, resources and support are available.

source ↗

Apr 2021
Segment acquired by Twilio

Segment was acquired by Twilio in a deal described as a $3.2 billion exit; Y Combinator lists the company's status as acquired, and Segment now operates as Twilio Segment.

$3.2B source ↗

Jul 2017
Segment raises $64M Series C led by Y Combinator Continuity Fund and GV

Series C of $64 million led by the Y Combinator Continuity Fund and GV, with participation from existing investors Accel, Thrive Capital, SV Angel and NEA; brought total funding to $109M.

$64M source ↗

Jul 2017
Ali Rowghani joins Segment's board of directors

As part of the Series C, Y Combinator Continuity Fund lead and former Twitter COO Ali Rowghani joined Segment's board.

source ↗

Jan 2011
Y Combinator Summer 2011 batch

Segment participated in Y Combinator's Summer 2011 batch; three founders, including CEO Peter Reinhardt, dropped out of MIT to attend.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 3

corporate structure
ClassMetric, Inc.
SegmentTennessee
Segment.io, Inc.

In the news

▸Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Segment do?
Twilio-owned customer data platform that collects, unifies and routes first-party customer data to hundreds of tools.
Who founded Segment?
Segment was founded by Ilya Volodarsky, Calvin French-Owen, Peter Reinhardt, Ian Taylor in 2011.
Who are Segment's investors?
Segment's investors include Accel, Converge, Founders Circle Capital, Greycroft, GV (Google Ventures), Headline, Headline Growth Management, LLC, Kleiner Perkins and 12 more.
How much funding has Segment raised?
Segment has disclosed $129M raised across 3 of its 5 known rounds.
Who acquired Segment?
Segment was acquired by Twilio.
Where is Segment headquartered?
Segment is headquartered in San Francisco, US.